Xen.org Unveils Ultimate Cloud Development Environment with First Xen Cloud Platform Release

2017-07-27T00:01:08+00:00 March 13th, 2011|Uncategorized|

» Xen.org, the home of the open source Xen hypervisor, today announced the availability of Xen® Cloud Platform (XCP) 1.0.  Developed as part of the Xen Cloud Project introduced in 2009, XCP 1.0 provides a full-featured solution for small and medium size enterprises wanting to build private clouds, as well as open source enthusiasts, universities and researchers wanting to experiment with cloud computing.  It represents a shift in enterprise usability for Xen.org, which has traditionally released software as source code only.  XCP enables developers to create and “play” with new and innovative technologies and techniques against a mature, stable and scalable virtualization stack.  

Facts and Highlights:

  • XCP is an open source server virtualization platform in a single, tested installable image that features the Xen hypervisor, network and storage support, a management stack and tools, as well as support for a range of guest operating systems including Windows® and Linux®.  
  • As a result of the close alignment between the Xen.org and OpenStack communities, XCP 1.0 integrates seamlessly with the OpenStack Bexar release, providing an end-to-end open source software stack covering everything from the bare metal to cloud orchestration software.  This integration will significantly help progress the vision of Xen.org and OpenStack to enable widespread ubiquity of virtual and cloud computing.
  • XCP 1.0 includes a fully featured, enterprise-class Xen API Management tool stack with features such as disaster recovery support, security, real-time performance monitoring, support for multi-host resource pools, and upgrade and patching capabilities.
  • XCP 1.0 provides support for virtual networking capabilities via Open vSwitch and a range of open source GUI management tools.
  • The Xen community will also be enabled to test features with XCP 1.0 that could offer future value to enterprise products such as Citrix XenServer® and Citrix OpenCloud.

Quotes:

  • Margaret Lewis, Director of Commercial Software Solutions, AMD:  “2011 is set to be the year when cloud deployments become even more widespread, and tools like XCP 1.0 will prove critical in developing the mature and secure cloud services of tomorrow.  AMD is committed to supporting the open-source Xen Community. The powerful combination of  AMD Opteron™ processors, with high core counts and outstanding power efficiency, and the Xen Cloud Platform can enable innovative, end-to-end solutions that deliver the features, scalability and performance that cloud providers require.”
  • Andrew Warfield, Assistant Professor, Department of Computer Science, University of British Columbia:  “XCP gives my students the opportunity to explore interesting new applications of virtualization – things like high-availability, next generation storage, and enhanced software development tools – all against a mature, stable, and scalable virtualization stack.  It’s a fantastic resource!”
  • Stephen Spector, Community Manager, OpenStack  “We are pleased the Xen.org and OpenStack communities are working together to advance open source cloud standards.  The OpenStack mission is to build the open standard cloud operating system with broad technology contributions and industry support, and support from the Xen.org community progresses that mission.”
  • Dan Kakinoki, President and CEO, VA Linux Japan:  “As a Xen.org advisory board member, VA Linux is excited to see XCP 1.0 and the new functionalities it offers.  It provides our clients an excellent opportunity and we expect it will continue to be the largest cloud platform. VA Linux continues to deliver high-quality consulting services for the Xen-based cloud technology in Japan.”

Source: Citrix

Citrix XenClient – What is XenClient?

2017-07-27T00:01:08+00:00 December 8th, 2010|Uncategorized|

What is Citrix XenClient?

Virtual desktops… to go

XenClient is a client-side hypervisor that enables virtual desktops to run directly on client devices. By separating the operating system from the underlying hardware, desktop images can now be created, secured, deployed and moved across any supported hardware, greatly reducing the maintenance burden on IT and simplifying disaster recovery for laptop users. Optimized for Intel vPro XenClient delivers the high definition experience that users expect.

XenClient Video

Learn how XenClient can bring security performance and flexibility to both IT and your laptop users extending the benefits of desktop virtualization to users that need to work from anywhere at anytime.

Citrix XenDesktop

2017-07-27T00:01:08+00:00 December 8th, 2010|Uncategorized|

What is Citrix XenDesktop?

Citrix XenDesktop transforms Windows desktops into an on-demand service that can be accessed by any user, on any device, anywhere, with unparalleled simplicity and scalability. Whether workers are using the latest tablets, smartphones, laptops or thin clients, XenDesktop can quickly and securely deliver virtual desktops and applications to them with a high-definition user experience.

Why use XenDesktop to transform your desktop computing environment?

Innovative technologies in XenDesktop enable you to turn your vision for a more flexible, mobile and agile desktop computing environment into a reality.

Citrix Receiver, a lightweight universal client, enables any PC, Mac, smartphone, tablet or thin client to access corporate applications and desktops—easily and securely.

Citrix HDX technology delivers a rich, complete user experience that rivals a local PC, from optimized graphics and multimedia, to high-definition webcam, broad USB device support and high-speed printing.

Going far beyond the limitations of VDI-only solutions, Citrix FlexCast delivery technology gives each type of worker in your enterprise the virtual desktop that’s right for them—hosted or local, online or offline, standardized or personalized—through a single solution.

Members of your workforce can access any Windows, web or SaaS application on demand through a single interface. Simple, self-service provisioning reduces desktop management costs and complexity.

Built on an open, scalable, proven architecture, XenDesktop gives you the simplicity, flexibility and scalability to meet any requirement, while fully leveraging current and future investments.

XenDesktop Video

Citrix XenApp 6 Sets New Standard in On-Demand App Delivery for Physical and Virtual Desktops

2017-07-27T00:01:09+00:00 September 10th, 2010|Uncategorized|

citrix_logoCitrix Systems, Inc. announced Citrix® XenApp™ 6, the de facto standard for centralizing applications in the datacenter and delivering them as an on-demand service to both physical and virtual desktops. XenApp 6 offers major new enhancements that simplify computing for IT, including easier central management, enhanced enterprise scalability and seamless integration with Microsoft technologies like App-V and Windows Server 2008 R2. XenApp 6 also improves productivity for end users with extensive new high-definition HDX™ technology enhancements and simplified self-service access to apps from any device, including PCs, Macs, laptops and smart phones.

The new enhancements to XenApp 6 will also be available as an integrated feature of the company’s comprehensive desktop virtualization solution, Citrix XenDesktop™ 4. Mainstream adoption of desktop virtualization requires a proven, scalable solution with the ability to deliver any type of virtual desktop to any user on any device, and to be able to interchange delivery technologies at any time. With more than half the ROI of virtual desktops coming from centralized app management, this integration provides an unparalleled advantage over any other desktop virtualization solution on the market today. This powerful combination makes it easy for customers to deliver apps as an on-demand service to any user, on any device, across a broad range of both physical and virtual desktops.


Bill Burley, Group Vice President and General Manager, XenApp Product Group at Citrix

“Citrix XenApp 6 delivers an entirely new level of IT simplification and user experience that goes beyond anything we’ve ever done with XenApp. The new simplified management capabilities and increased scalability reduce the cost of application management by up to 50 percent for both physical and virtual desktop environments. Combined with Citrix Dazzle, the self-service enterprise app store, and broad new support for Macs, laptops and smart phones with Citrix Receiver, customers can now deliver apps as an on-demand service to any user in any location at a fraction of the cost of traditional application management.”

Garth Fort, General Manager of System Center Marketing, Server and Tools Business at Microsoft Corp.  

“With support for Windows Server 2008 R2 in XenApp 6 and new integration with Citrix XenApp and Microsoft App-V, we are providing increasing value to our customers and delivering a simplified yet powerful application delivery infrastructure. Customers can leverage their existing investment in Microsoft solutions while continuing to expand their ability to deliver applications on-demand.”

Key Facts and Highlights:

  • Simplified Management – XenApp 6 dramatically simplifies desktop computing with AppCenter™, a powerful new management console that makes it easy for IT to centrally manage all applications enterprise-wide from a single location.
  • Unparalleled Scalability – XenApp 6 has been verified to scale up to more than 100,000 concurrent users in a single farm, giving customers unprecedented levels of cost savings and datacenter efficiency.
  • Expanded Microsoft Integration – Seamless integration between XenApp 6 and Microsoft App-V makes it easy for customers to centrally manage applications using whatever mix of local and hosted solutions best fit their unique requirements. XenApp 6 also includes full support for Microsoft Windows Server 2008 R2, adding a broad range of platform enhancements including simplified provisioning, easier automation, and more efficient power consumption.
  • Self-Service Apps – Through its integration with Citrix Dazzle™, XenApp 6 gives users an entirely new level of flexibility and mobility, allowing them to choose the apps they need on-demand, without costly manual IT support. Apps available to users through the Dazzle “storefront” can include those delivered by XenApp or Microsoft App-V, as well as IT supported SaaS or web applications.
  • Mac and Smart Phone Support – In addition to supporting PCs, thin clients and laptops, XenApp 6 now makes it easy for users to access Windows apps from Macs and popular smart phones such as Apple iPhone, Google Android and Windows Mobile.
  • Enhanced High-Definition HDX™ Technology – XenApp 6 includes broad new HDX technology enhancements that allow customers to deliver real-time media applications like voice and CD-quality audio with a rich, high-definition user experience. New HDX enhancements in XenApp 6 also expand support for a broad range of USB devices, including webcams, microphones, digital cameras and scanners.

Video: Highlights of XenApp 6
Pricing and Availability:

The new XenApp 6 release will be available for download beginning on March 24, 2010, and will be offered as a free upgrade to all XenApp customers with current Subscription Advantage agreements. Suggested list pricing for new licenses of XenApp 6 will begin at $350 per concurrent user. More information on the new features in XenApp 6 can be found at http://www.citrix.com/xenapp6.

XenApp 6 will also be included as an integrated feature of the company’s broader XenDesktop 4 product line, which is available to customers at a suggested list price beginning at $225 per-user or per-device.

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About Citrix
Citrix Systems, Inc. (NASDAQ:CTXS) is a leading provider of virtualization, networking and cloud computing solutions for more than 230,000 organizations worldwide. Its Citrix Delivery Center™, Citrix Cloud Center™ (C3) and Citrix Online product families radically simplify computing for millions of users, delivering desktops and applications as an on-demand service to any user, in any location on any device. Citrix customers include the world’s largest Internet companies, 99 percent of Fortune Global 500 enterprises, and hundreds of thousands of small businesses and prosumers worldwide. Citrix partners with over 10,000 companies worldwide in more than 100 countries. Founded in 1989, annual revenue in 2009 was $1.61 billion.

For Citrix Investors
This release contains forward-looking statements which are made pursuant to the safe harbor provisions of Section 21E of the Securities Exchange Act of 1934.  The forward-looking statements in this release do not constitute guarantees of future performance.  Those statements involve a number of factors that could cause actual results to differ materially, including risks associated with revenue growth and recognition of revenue, products, their development and distribution, product demand and pipeline, economic and competitive factors, the Company’s key strategic relationships, acquisition and related integration risks as well as other risks detailed in the Company’s filings with the Securities and Exchange Commission. Citrix assumes no obligation to update any forward-looking information contained in this press release or with respect to the announcements described herein.

The development, release and timing of any features or functionality described for our products remains at our sole discretion and is subject to change without notice or consultation. The information provided is for informational purposes only and is not a commitment, promise or legal obligation to deliver any material, code or functionality and should not be relied upon in making purchasing decisions or incorporated into any contract.

Source: Citrix

Citrix Extends Client Virtualization

2017-07-27T00:01:09+00:00 August 30th, 2010|Uncategorized|

Virtualization software maker Citrix Systems last week unveiled the word’s first bare-metal client hypervisor, announced a new version of its server virtualization platform and welcomed news from several partners.

Citrix used its annual Synergy show, held this year in San Francisco, to let partners and customers know that it is aiming to extend its ecosystem.

The new XenClient product is a “super fast, 64-bit, bad-to-the bone hypervisor — a true Type 1 hypervisor that bonds to the laptop and delivers a bare metal experience to the apps, OS and things that run on top of it,” said Citrix CEO Mark Templeton, speaking in his keynote address. The company made an “express kit” trial version available for download and promised general availability later this year.

“Desktop virtualization is going mainstream,” Templeton said. “It’s becoming more and more of the fabric of enterprise computing.” Computer makers Dell and Hewlett-Packard disclosed plans at the show to roll out new laptops designed to support the new XenClient hypervisor. The bare-metal client hypervisor is essentially the same technology used on servers, but designed for a client machine.

Although it’s possible to use a server hypervisor on a client machine, it’s not made for that hardware, hence it lacks support for USB devices, graphics accelerators and other features essential to the client. Templeton declared that XenClient would “change the game” by adding a local hypervisor to the laptop, allowing a single-client box to run multiple VMs.

The advantages of running multiple VMs on a single corporate laptop are myriad: A user can, for example, keep personal computing files and apps on a corporate laptop securely isolated in a separate VM. IT can provide a temporary employee or contractor with VM loaded with corporate apps.

And client-side hypervisors make provisioning to mobile client machines much simpler. “People forget that last

[point],” said Ovum senior analyst Tim Stammers. “But if you talk to IT departments, they’ll tell you making images for machines is a real pain. The local hypervisor solves that problem.”

Both Citrix and rival virtualization company VMware promised in 2008 to deliver a client-side hypervisor in 2009. “The fact that they were both late shows that this is very hard stuff,” Stammers said.

Native Bare Metal Hypervisor

XenClient is a Type 1 hypervisor, a native hypervisor that runs on bare metal. Existing Type 2 hypervisors, which have been around for a long time and allow users to do things like run Windows on a Mac (such as Player and Parallels), aren’t as secure as the native versions, Stammers said. Type 2s run on an operating system that can be hacked.

The XenClient was developed in collaboration with chip maker Intel, and optimized for Intel Core 2 desktops and laptops with its vPro technology. The hypervisor serves as “a foundation for centrally managed OS/user environments to be streamed, cached and executed locally on desktop/laptop devices, including off-network mobility,” the two companies said in a statement.

According to sources close to the company, VMware is concentrating on refining its Type 2 virtualization technology, rather than pursing a bare-metal client strategy. VMware had not returned calls for comment at press time. But Stammers believes that VMware will probably come out with a native client hypervisor later this year.

Conference attendee Larry Cohen, a systems administrator for a Silicon Valley manufacturer he preferred not to name, was impressed by the XenClient technology, but said he wished the company would focus more on XenCenter, the company’s XenServer management console. In particular, he’d like to see a better event viewer and logging capabilities. “It would make troubleshooting issues on the physical hardware a lot easier,” Cohen said.

Server Upgrade

Citrix also launched XenServer 5.6 at the show. The latest version of its server virtualization platform mainly fills in some gaps in the previous version, Stammer said. Memory management was one of the key enhancements, he said, but also pointed to new features in the Enterprise and Platinum editions, including automatic work-load balancing, power management and storage integration with StorageLink, Citrix’s platform for providing linking server virtualization to storage resources.

“This market has become a constant race to add tools,” Stammer said. “I often say that server virtualization gives you great flexibility, but flexibility can tie you in knots. So we do need these tools, and different shops need different tools.”

XenServer 5.6 comes in four editions: Free, Advanced, Enterprise and Platinum. Each edition provides additional features.

The free version of XenServer has become an “entryway for new virtualization customers” for Citrix, said IDC analayst Al Gillen. IDC is seeing a growing number of infrastructure vendors using the “free-plus-premium”offering strategy (sometimes called “freemium”) to build market share, Gillen said. 

Stammer applauded both Citrix releases, but said that the future of XenServer is uncertain. Increasingly, this market looks like it’s going to come down to Microsoft’s Hyper-V and VMware ESX, he said. He points to statements by Citrix executives, who as recently as 18 months ago, said that in the future most of Citrix’s business will come from the sale of tools used to manage Hyper-V.

HP Readies XenClient Notebooks

HP made a splash at the show with demos of the industry’s first Citrix-ready XenClient platforms. “Using a local hypervisor, the ability to bring the virtual machine down and run it locally, allows you to be productive whether you’re connected or not,” said Jeff Groudan, director of thin client solutions for HP’s person systems group. “So you have the mobility, but also a lot of the management capabilities inherent of VDI (virtual desktop infrastructure), such as being able to manage the image centrally.”

HP also gave a nod to Adobe’s recently beleaguered Flash technology with an enhancement of the Remote Desktop Protocol (RDP) 6. RDP 6 is one of the most common VDI protocols used by VMware View and Microsoft Remote Desktop Services environments, but it doesn’t Flash natively. The RDP Enhancements for Flash is a component that runs on the thin client machine and allows the server to redirect the Flash content down to the client, which also decompresses the file.

“One of the challenges of client virtualization, whether it’s Citrix or someone else’s VDI environment, is they don’t handle Flash very elegantly,” Groudan said. “The experience may not be very good, or it may overly load down the server when they do the decompression for the thin client. The RDP Enhancements fix that problem.

“It was clear to us that complexity of client virtualization has been an inhibitor of growth in this area, Groudan added. “So we have a laser focus on simplifying the process, but also on optimizing the end-user experience.”

HP also unveiled VDI reference architectures for XenDesktop and XenServer at the Synergy event. Joseph George, client virtualization business lead for HP’s infrastructure software and blades division, said the reference architectures are the fruit of his company’s ongoing strategy of “converged infrastructure.” HP believes that that strategy can accelerate the delivery of client virtualization.

“We’ve got the best portfolio out there when it comes to converged infrastructure and client virtualization,” he said. “And the expertise we have in our ranks has allowed us to put together these new reference architectures.”

The new HP and Citrix VDI reference architectures provide the functionality of a stand-alone desktop, George said, while enabling unified management of both physical and virtual infrastructures from the same centralized console.

The HP/Citrix VDI solution supports more than 1,000 users of XenDesktop 4.0, XenServer 5.5 or Provisioning Server 5.1, George said. It leverages HP BladeSystem’s c-Class or HP ProLiant servers with HP Flex-10 technology, HP storage and networking and a choice of HP t5740 or HP t5325 thin client machines.

The big gadget news at the event came from Dell CEO and founder Michael Dell, who surprised conference attendees by officially unveiling his company’s new mini-tablet PC during his keynote. It was actually more of a teaser than an unveiling of the device a MID (mobile Internet device) dubbed The Streak, which Dell casually pulled from his pocket while onstage.

“The device we use to access our information shouldn’t matter anymore,” Dell said. “Whether it’s a phone, or a notebook, a netbook or a desktop PC, your client image can follow you everywhere.” Dell then took the wraps off The Streak, which was loaded with the Android OS and Citrix’s virtual desktop software. Dell said The Streak would be available first in Europe in June, with a U.S. launched planned for later this summer. The carrier will be AT&T.

  • By John K. Waters
    • 05/17/2010

 

Source: Redmondmag.com

TAKE FIVE: Why I Like Citrix

2017-07-27T00:01:09+00:00 August 10th, 2010|Uncategorized|

Here’s a situation where the nice guy finishes as President and CEO.

For the past few weeks, I’ve been working on a profile of Citrix. I’ve really enjoyed the research — because I felt like there was a good story lurking under the covers — and the writing, which has been made easier by the great interviews I had with Citrix CTO Simon Crosby, and Citrix President and CEO Mark Templeton. Here’s what I discovered.

Take 1
Mark Templeton. I can’t help it, I just like the guy. He was running late for our phone interview, so I had some time to chat with Julie Geer, the helpful PR person who had lined up the interview, and she was telling me how much everybody likes Mark — I know, I know, it’s not as though she’s going to say what a dirtball he is, even if he was, which he isn’t. When Templeton gets on the line, he apologizes left and right about keeping me waiting. My reaction: Wow, he’s totally unpretentious for a guy in his position. There was no “slick” in him. On a more professional level, you’ve got to admire somebody who has been president and CEO of a high-tech company for 11 years and has not only hung onto his job, but has navigated Citrix through a lot of turbulent waters. Mark Templeton = good guy.

Take 2
Simon Crosby. When I think of Simon, I harken back to Eric Clapton (E.C.) talking about Stevie Ray Vaughan. E.C. said Stevie Ray was like an “open channel,” meaning that he never had to stop and regroup before taking off on another fabulous sonic blast. Simon is a great interview because he can talk on and on — in detail — about whatever he’s asked to discuss. The only downside to that is trying to figure out what to use and what to edit out, which is a small price to pay for all that good content.

Take 3
The Microsoft deal. When you take the time to look at this long-standing agreement (it goes back at least to the late ’90s), you can see how good it is for both companies, which are complementary as opposed to being competitive. As long as Citrix can remain the company that best exemplifies what Microsoft is looking for in an OEM partner — which Microsoft says is the case — they can continue to earn big bucks by delivering Windows apps to that huge market. Adding to the luster for Citrix: Microsoft makes no bones about saying VMware is a competitor.

Take 4
XenDesktop. The buck stops at XenDesktop, which is the real deal for Citrix as a competitor to VMware, and which is now available as part of a suite with XenApp, which has been making Citrix a lot of money for a long time. Yes, VMware has excelled in the server virtualization market — which seems not to bother Citrix because the company still has big plans for XenServer as the hypervisor of choice for XenDesktop, XenApp and NetScaler — but Citrix is at least VMware’s equal in the VDI/desktop virtualization space, which has huge potential. XenDesktop’s use of HDX adaptive technology (which includes the ICA protocol) looks to have an advantage over PCoIP, which VMware uses with its View VDI product. Bottom line: the future looks legitimately bright.

Take 5
The Citrix image. Citrix has been taking it on the chin from bloggers, reporters and pundits of all kinds for quite a while now, mostly around two topics: the possible demise of XenServer as a result of its perceived poor performance in the server virtualization market, and the possibility of Microsoft abrogating its cooperative agreement with Citrix and then blowing the company out of the virtualization market. To which I reply: Citrix has announced that the next full version of XenServer will be available by mid-year, and Microsoft loves dealing with Citrix, as I noted in my third take. All of which goes to prove: indeed, image is not everything.

Source: Redmondmag.com

Top 10 Storage Virtualization Trends of 2010

2017-07-27T00:01:09+00:00 August 4th, 2010|Uncategorized|

The storage area network (SAN) is now an essential technology for many large and midsize enterprises. Over the years SANs have become more sophisticated as vendors have rolled out systems that deliver better storage utilization and functionality. Based on these positive developments, 2010 should bring new and interesting products in several key areas. Here are our top 10 trends to keep an eye on in the coming year — along with the insights of key IT managers who are looking to optimize their existing storage and virtualization strategies.

1. Integration of solid state with rotating media for higher performance and lower energy costs.
Product picks: EMC FAST, Fusion-io, Compellent Storage Center

In an effort to provide the best possible storage solutions, many storage vendors are looking for ways to marry the high performance of solid-data memory to the lower cost of rotating media. As prices continue to drop for all storage technologies — and as hard drives get faster and cheaper — vendors are specifically working to incorporate the latest solid-state drive technologies into traditional SAN arrays. EMC Corp. and Compellent both offer fully automated storage tiering, which is the ability to store data depending on the needs of the application. More-frequently accessed files are stored on faster-performing disks, while less-frequently needed files are moved to tape.

“We’re using the Compellent product as part of our new Savvis Symphony cloud infrastructure service offering,” says Bryan Doerr, CTO of St. Louis-based services provider Savvis Inc. “We like how it has a policy that sits between the application and the array to control how each block of data is written to the physical media, based on frequency of usage.”

Doerr is pleased that these decisions are made automatically. “We don’t have to map tables or keep track of what files are stored where, and that’s a very powerful benefit to us,” he says. “Compellent can move individual blocks from a low-cost and low-performing SATA drive to a solid-state drive for the most-frequently updated data.”

One of the more interesting products is a hardware accelerator plug-in adapter card from Fusion-io that can pre-cache data using solid data memory for SAN arrays and other large-scale storage applications.

2. De-duplication technology — on storage and backups — can help open unused space.
Product picks: EMC Avamar, Symantec/Veritas Netbackup PureDisk, IBM/Tivoli Storage Manager, NetApp FlexClone

De-duplication technologies can provide a powerful way to quickly reclaim storage and minimize backup jobs. When users first start applying these technologies, they’re frequently surprised at how much duplication actually exists. As depicted in Figure 1, with PureDisk software from Symantec Corp., users can drill into a backup job and see that they could save more than 95 percent of their storage by getting rid of duplicate data. This capability offers huge potential savings, particularly when backing up virtual machine (VM) collections and remote offices.

Part of the challenge when using VMs is dealing with the fact that they share many common files inside each virtual image — the boot files for the operating system, the applications and so forth. A de-duplication product can leverage this by making only a single copy of common files.

PureDisk is typical of de-duplication products in that it operates in two different ways. For starters, you can use a PureDisk client or agent that runs on each VM and reports the unique files back to the central PureDisk backup server. And PureDisk can also back up the entire VMware VMDK image file without any agents on the separate VMs. This offloads backup from the ESX server and enables single-pass backups to protect all the files — whether they’re in use or not — that comprise the VM.

“De-duplication gives us big storage savings,” says Chuck Ballard, network and technical services manager at food manufacturer J&B Group, based in St. Michael, Minn. “We have 30 machines, each with a 20GB virtual hard drive, on our SAN. Rather than occupy 600GB, we have about a third of that, and we can grow and shrink our volumes as our needs dictate. We use the

[NetApp] LUN copy utility to replicate our workstation copies off of a master image.”

Ballard stores his images on NetApp’s SAN arrays that have their own utility — called FlexClone — to make virtual copies of the data. “We had EMC and also looked at IBM, but both of them had limited dynamic-provisioning features,” he says, adding that a VMware upgrade that required 4.5TB on J&B Group’s old SAN now uses just 1.5TB on the company’s new storage infrastructure.

3. More granularity in backup and restoration of virtual servers.
Product picks: Vizioncore vRanger Pro, Symantec Netbackup, Asigra Cloud Backup

When combined with de-duplication technologies, more granular backups make for efficient data protection — particularly in virtualized environments where storage requirements quickly balloon and it can take longer than overnight to make backups. Backup vendors are getting better at enabling recoveries that understand the data structure of VM images and can extract just the necessary files without having to restore an entire VM disk image. Symantec Netbackup and Vizioncore vRanger both have this feature, which makes them handy products to have in the case of accidentally deleted configuration or user files. For its part, Asigra Cloud Backup can protect server resources both inside the data center and the cloud.

4. Live migrations and better integration of VM snapshots make it easier to back up, copy and patch VMs.
Product picks: FalconStor FDS, VMware vMotion and vStorage APIs, Citrix XenServer

VMware vStorage API for Data Protection facilitates LAN-free backup of VMs from a central proxy server rather than directly from an ESX Server. Users can do centralized backups without the overhead and hassle of having to run separate backup tasks from inside each VM. These APIs were formerly known as the VMware Consolidated Backup, and the idea behind them is to offload the ESX server from the backup process. This involves taking VM snapshots at any point in time to facilitate the backup and recovery process, so an entire .VMDK image doesn’t have to be backed up from scratch. It also shortens recovery time.

Enhanced VM storage management also includes the ability to perform live VM migrations without having to shut down the underlying OS. Citrix Systems XenServer offers this feature in version 5.5, and VMware has several tools including vMotion and vSphere that can make it easier to add additional RAM and disk storage to a running VM.

Finally, vendors are getting wise to the fact that many IT engineers are carrying smartphones and developing specific software to help them manage their virtualization products. VMware has responded to this trend with vCenter Mobile Access, which allows users to start, stop, copy and manage their VMs from their BlackBerry devices. Citrix also has its Receiver for iPhone client, which makes it possible to remotely control a desktop from an iPhone and run any Windows apps on XenApp 5- or Presentation Server 4.5-hosted servers. While looking at a Windows desktop from the tiny iPhone and BlackBerry screens can be frustrating — and a real scrolling workout — it can also be helpful in emergency situations when you can’t get to a full desktop and need to fix something quickly on the fly.

5. Thin and dynamic provisioning of storage to help moderate storage growth.
Product picks: Symantec/Veritas Storage Foundation Manager, Compellent Dynamic Capacity, Citrix XenServer Essentials, 3Par Inserv

There are probably more than a dozen different products in this segment that are getting better at detecting and managing storage needs. A lot of space can be wasted setting up new VMs on SAN arrays, and these products can reduce that waste substantially. This happens because, when provisioning SANs, users generally don’t know exactly how much storage they’ll need, so they tend to err on the high side by creating volumes that are large enough to meet their needs for the life of the server. The same thing happens when they create individual VMs on each virtual disk partition.

With dynamic-provisioning applications, as application needs grow, SANs automatically extend the volume until it reaches the configured maximum size. This allows users to over-provision disk space, which is fine if their storage needs grow slowly. However, because VMs can create a lot of space in a short period of time, this can also lead to problems. Savvy users will deal with this situation by monitoring their storage requirements with Storage Resource Management tools and staying on top of what has been provisioned and used.

Savvis is using the 3Par InServ Storage Servers for thin provisioning. “We don’t have to worry about mapping individual logical units to specific physical drives — we just put the physical drives in the array and 3Par will carve them up into usable chunks of storage. This gives us much higher storage densities and less wasted space,” says Doerr.

Citrix XenServer Essentials includes both thin- and dynamic-provisioning capabilities, encoding differentials between the virtual disk images so that multiple VMs consume a fraction of the space required because the same files aren’t duplicated. Dynamic workload streaming can be used to rapidly deploy server workloads to the most appropriate server resources — physical or virtual — at any time during the week, month, quarter or year. This is particularly useful for applications that may be regularly migrated between testing and production environments or for systems that require physical deployments for peak user activity during the business cycle.

Compellent has another unique feature, which is the ability to reclaim unused space. Their software searches for unused storage memory blocks that are part of deleted files and marks them as unused so that Windows OSes can overwrite them.

6. Greater VM densities per host will improve storage performance and management.
Product pick: Cisco Unified Communications Server

As corporations make use of virtualization, they find that it can have many applications in a variety of areas. And nothing — other than video — stretches storage faster than duplicating a VM image or setting up a bunch of virtual desktops. With these greater VM densities comes a challenge to keep up with the RAM requirements needed to support them.

In this environment, we’re beginning to see new classes of servers that can handle hundreds of gigabytes of RAM. For example, the Cisco Systems Unified Communications Server (UCS) supports large amounts of memory and VM density (see Figure 2): In one demonstration from VirtualStorm last fall at VMworld, there were more than 400 VMs running Windows XP on each of six blades on one Cisco UCS. Each XP instance had more than 90GB of applications contained in its Virtual Desktop Infrastructure image, which was very impressive.

“It required a perfect balance between the desktops, the infrastructure, the virtualization and the management of the desktops and their applications in order to scale to thousands of desktops in a single environment,” says Erik Westhovens, one of the engineers from VirtualStorm writing on a blog entry about the demonstration.

Savvis is an early UCS customer. “I like where Cisco is taking this platform; combining more functionality within the data center inside the box itself,” Doerr says. “Having the switching and management under the hood, along with native virtualization support, helps us to save money and offer different classes of service to our Symphony cloud customers and ultimately a better cloud-computing experience.”

“If you don’t buy enough RAM for your servers, it doesn’t pay to have the higher-priced VMware licenses,” says an IT manager for a major New York City-based law firm that uses EMC SANs. “We now have five VMware boxes running 40 VMs a piece, and bought new servers specifically to handle this.”

As users run more guest VMs on a single physical server, they’ll find they need to have more RAM installed on the server to maintain performance. This may mean they need to move to a more expensive, multiple-CPU server to handle the larger RAM requirements. Cisco has recognized that many IT shops are over-buying multiple-CPU servers just so they can get enough dual in-line memory module slots to install more RAM. The Cisco UCS hardware will handle 384GB of RAM and not require the purchase of multiple processor licenses for VMware hypervisors, which saves money in the long run.

James Sokol, the CTO for a benefits consultancy in New York City, points out that good hypervisor planning means balancing the number of guest VMs with the expanded RAM required to best provision each guest VM. “You want to run as many guests per host [as possible] to control the number of host licenses you need to purchase and maintain,” Sokol says. “We utilize servers with dual quad-core CPUs and 32GB of RAM to meet our hosted-server requirements.”

A good rule of thumb for Windows guest VMs is to use a gigabyte of RAM for every guest VM that you run.

7. Better high-availability integration and more fault-tolerant operations.
Product picks: VMware vSphere 4 and Citrix XenServer 5.5

The latest hypervisors from VMware and Citrix include features that expedite failover to a backup server and enable fault-tolerant operations. This makes it easier for VMs to be kept in sync when they’re running on different physical hosts, and enhances the ability to move the data stored on one host to another without impacting production applications or user computing. The goal is to provide mainframe-class reliability and operations to virtual resources.

One area where virtualized resources are still playing catch-up to the mainframe computing world is security policies and access controls. Citrix still lacks role-based access controls, and VMware has only recently added this to its vSphere line. This means that in many shops, just about any user can start and stop a VM instance without facing difficult authentication hurdles. There are third-party security tools — such as the HyTrust Appliance for VMware — that allow more granularity over which users have what kind of access to particular VMs. Expect other third-party virtualization management vendors to enter this market in the coming year. (To get an idea of how HyTrust’s software operates, check out the screencast I prepared for them here.)

8. Private cloud creation and virtualized networks — including vendor solutions that offer ways to virtualize your data center entirely in the cloud.
Product picks: Amazon Virtual Private Cloud, VMware vSphere vShield Zones, ReliaCloud, Hexagrid VxDataCenter

Vendors are virtualizing more and more pieces of the data center and using virtual network switches — what VMware calles vShield Zones — to ensure that your network traffic never leaves the virtualized world but still retains nearly the same level of security found in your physical network. For example, you can set up firewalls that stay with the VMs as they migrate between hypervisors, create security policies and set up virtual LANs. Think of it as setting up a security perimeter around your virtual data center.

Amazon has been hard at work with Elastic Computing — its cloud-based, virtualization-hosted storage — and last summer added Virtual Private Cloud to its offerings (see Figure 3). This enables users to extend their VPNs to include the Amazon cloud, further mixing the physical and virtual network infrastructures. It’s also possible to extend any security device on your physical network to cover the Amazon cloud-based servers. The same is true with Amazon Web Services, where customers pay on a usage-only basis with no long-term contracts or commitments.

Microsoft has a series of new projects to extend its Windows Azure cloud-based computing to private clouds. They can be found at here and include ventures such as “Project Sydney,” which enables customers to securely link their on premises-based and cloud servers; AppFabric, which is a collection of existing Windows Azure developer components; and updates to Visual Studio 2010.

Some of these are, or soon will be, available in beta. But like other efforts, more federated security between the cloud and in-house servers will require improvements before these new offerings can be dependably used by most enterprises.

Two new entrants to the cloud computing services arena are Hexagrid Inc. and ReliaCloud, both of which offer a wide range of infrastructure services, including high availability, hardware firewalls and load balancing. With these companies, all cloud servers are assigned private IP addresses and have persistence, meaning that users treat them as real servers even though they’re residing in the cloud. Expect more vendors to offer these and other features that allow IT managers to combine physical and cloud resources.

9. Better application awareness of cloud-based services.
Product picks: Exchange 2010, Sparxent MailShadow
It isn’t just about networks in the cloud, but actual applications too, such as Microsoft Exchange services. The days are coming when you’ll be able to run an Exchange server on a remote data center and failover without anyone noticing. Part of this has to do with improvements Microsoft is making to the upcoming 2010 release of its popular e-mail server software. This also has to do with how the virtualization and third-party vendors are incorporating and integrating disaster recovery into their software offerings. An example of the latter is MailShadow from Sparxent Inc. This cloud-based service makes a “shadow” copy of each user’s Exchange mailbox that’s kept in constant synchronization. There are numerous cloud-based Exchange hosting providers that have offered their services over the past few years, and Microsoft is working on its own cloud-based solutions as well.

10. Start learning the high-end, metric system measurements of storage.
If you thought you knew the difference between gigabytes and terabytes, start boning up on the higher end of the metric scale. SAN management vendor DataCore Software Corp. now supports arrays that can contain up to a petabyte — a thousand terabytes — of data. Savvis sells 50GB increments of its SAN utility storage to its co-location customers, which Doerr says has been very well received. “It’s for customers that don’t want to run their own SANs or just want to run the compute-selected functions,” he states. “There’s a lot of variation across our customers. You have to be flexible if you want to win their business.” Given that it wasn’t too long ago when no one could purchase a 50GB hard drive, he says this shows that, “we’re going to be talking exabytes when it comes to describing our storage needs before too long.” Next up: zettabytes and yottabytes.

Source: Redmondmag.com

Virtual Servers, Real Growth

2017-07-27T00:01:09+00:00 July 12th, 2010|Uncategorized|

 

If you follow tech industry trends, you’ve probably heard of cloud computing, an increasingly popular approach of delivering technology resources over the Internet rather than from on-site computer systems.

Chances are, you’re less familiar with virtualization — the obscure software that makes it all possible.

The concept is simple: rather than having computers run a single business application — and sit idle most of the time — virtualization software divides a system into several “virtual” machines, all running software in parallel.

The technology not only squeezes more work out of each computer, but makes large systems much more flexible, letting data-center techies easily deploy computing horsepower where it’s needed at a moment’s notice.

The approach cuts costs, reducing the amount of hardware, space and energy needed to power up large data centers. Maintaining these flexible systems is easier, too, because managing software and hardware centrally requires less tech support.

The benefits of virtualization have made cloud computing an economical alternative to traditional data centers.

“Without virtualization, there is no cloud,” said Charles King, principal analyst of Pund-IT.

That’s transforming the technology industry and boosting the fortunes of virtualization pioneers such as VMware (NYSE:VMW – News), Citrix Systems (NMS:CTXS), two of the best-performing stocks in IBD’s specialty enterprise software group. As of Friday, the group ranked No. 24 among IBD’s 197 Industry Groups, up from No. 121 three months ago.

1. Business

Specialty enterprise software represents a small but fast-growing segment of the overall software enterprise market, which according to market research firm Gartner is set to hit $229 billion this year.

As with most software, the segment is a high-margin business. With high upfront development costs but negligible manufacturing and distribution expenses, specialty software companies strive for mass-market appeal. Once developers recoup their initial development costs, additional sales represent pure profit.

Software developers also make money helping customers install and run their software, another high-margin business.

But competition is fierce. Unlike capital-intensive businesses, software companies require no factory, heavy equipment, storefront or inventory to launch. Low barriers to entry mean a constant stream of new competitors looking to out-innovate incumbents.

In addition to the virtualization firms, notable names in the group include CA Technologies (NMS:CA) and Compuware (NMS:CPWR).

All offer infrastructure software to manage data centers.

“Big-iron” mainframe computers began using virtualization in the 1970s, around the time when CA and Compuware were founded.

In the late 1990s, VMware brought the technology to low-cost systems running ordinary Intel (NMS:INTC) chips. VMware has since emerged as the dominant player in virtualization.

Citrix has added a twist to the concept, virtualizing desktop computers. Rather than installing workers’ operating system and applications on hundreds of PCs spread across the globe, companies can use the technology to run PCs from a bank of central servers. Workers, who access their virtual PCs over the Internet, don’t know the difference.

Microsoft (NMS:MSFT) has jumped in with its own virtualization product, HyperV, which it bundles free into Windows Server software packages. Oracle (NMS:ORCL) and Red Hat (NYSE:RHT – News) have launched virtualization products as well.

Meanwhile, CA and Compuware are racing to move beyond their mainframe roots to support virtualization and cloud-computing-enabled data centers. In February, CA said it would buy 3Tera to build services and deploy applications aimed at the cloud-computing market.

And Compuware bought privately held Gomez, Inc. last fall to manage cloud application performance.

Name Of The Game: Innovate. With a fast-moving market and steady influx of new competitors, keeping customers happy with good service and money-saving breakthroughs is vital.

2. Market

Nearly everyone who runs a corporate computer system is a potential buyer of virtualization software. Companies ramping up their information-technology purchases use the software to manage their sprawling infrastructure; others with limited budgets use it to squeeze more out of their existing systems.

Sales of server-virtualization software are set to grow 14% this year to $1.28 billion, according to a report by Lazard Capital Markets. Sales of software to manage virtual environments will grow 44% in 2010 to $1.88 billion.

Desktop virtualization revenue will rise 184% this year to $847.8 million. Citrix has the edge in this budding market with its XenDesktop product.

VMware is dominant among large enterprises, controlling about 85% of the server virtualization market. Microsoft is favored by small and midsize companies.

Virtualization is seen as “a strategic asset” for enabling cloud computing, and continues to gain momentum, says Lazard analyst Joel Fishbein.

VMware has the early-mover advantage in this market with its vSphere platform and has stayed ahead by adding new features such as data security and disaster recovery, analysts say.

But Citrix is partnering closely with Microsoft to take on VMware in virtualization.

3. Climate

Competition is heating up as companies scramble to adopt virtualization. Before 2009, just 30% of companies used virtualization, says analyst Fishbein. This year, that will double to 60%. Most of the gain is coming from small and midsize customers.

In addition, virtual servers are soon expected to more than double as a percentage of the overall server workload, from 18% today to 48% by 2012.

VMware says it can stay a step ahead of the pack by building new features into its products, says Dan Chu, VMware’s vice president of cloud infrastructure and services.

“We have a large technology lead with what we enable for our customers,” Chu said. “We are several years ahead of what the others are doing.”

Citrix CEO Mark Templeton says his firm’s broadening strategy — offering a variety of products with multiple licensing options and distribution channels — will grow sales.

“What’s going on is a massive shift in how computing gets delivered,” Templeton said. “In an environment that’s changing so dramatically, the highest-risk thing you can do is not act.”

4. Technology

The first virtualization boom stemmed from a shift over the last decade away from big expensive mainframes and minicomputers to massive banks of cheap Intel-powered machines. Virtualization gave these low-cost systems some of the high-end features of their pricier counterparts.

Virtualization software makers are betting on a second wave of growth fueled by the industrywide shift to cloud computing.

Technology managers use virtualization to run cloud computing in their own data centers. And large tech vendors such as Microsoft use the technology for cloud-computing services they sell to customers.

Dividing computers into isolated virtual machines gives cloud service providers the benefits of shared computing resources without the security downsides.

VMware has the early lead in virtualization. But the technology is quickly becoming a commodity as Microsoft and others bundle it into their broader platforms.

“VMware is known as a virtualization company, and Microsoft is a platform company,” said David Greschler, who heads up Microsoft’s virtualization efforts. “Their strategy is to sell virtualization, but our strategy is to make virtualization available as part of a larger platform at no extra cost.”

At the same time, a shift toward a world of cloud-computing services hosted by the likes of Microsoft, Amazon.com (NMS:AMZN) and Google (NMS:GOOG) could lead to fewer companies purchasing virtualization software themselves.

Source: Investor’s Business Daily

Avoiding the Pitfalls of Virtualization

2017-07-27T00:01:09+00:00 July 8th, 2010|Uncategorized|

Virtualization is rarely as simple to implement and manage as it has been made out to be. Here’s what to look out for when planning your organization’s next virtualization project.

No technology in recent memory has come with as many promises as server virtualization. As I’m sure you know, all of these promises can be broken down into one simple concept: Virtualization allows you to consolidate a bunch of underutilized servers into a single server, which allows the organization to save a bundle on maintenance costs.

So with server virtualization promising such a dramatic boost to an organization’s return on investment (ROI), even in a bad economy, what’s not to like? What many organizations are finding out is that in practice, virtualization is rarely as simple to implement and manage as it has been made out to be. In fact, there are numerous potential pitfalls associated with the virtualization process. In this article, I want to take a look at some of these pitfalls, and at how they can impact an organization.

Subpar Performance
While it’s true that virtualizing your data center has the potential to make better use of server resources, any increase in ROI can quickly be consumed by decreased user productivity if virtual servers fail to perform as they did prior to being virtualized. In fact, it has been said that subpar performance is the kiss of death for a virtual data center.

So how do you make sure that your servers are going to perform as well as they do now when virtualized? One common solution is to work through some capacity planning estimates, and then attempt to virtualize the server in an isolated lab environment. But this approach will only get you so far. Lab environments do not experience the same loads as production environments, and while there are load simulation tools available, the reliability of these tools decreases dramatically when multiple virtual servers are being tested simultaneously.

While proper capacity planning and testing are important, you must be prepared to optimize your servers once they have been virtualized. Optimization means being aware of what hardware resources are being used by each virtual server, and making any necessary adjustments to the way hardware resources are distributed among the virtual machines (VMs) in an effort to improve performance across the board for all of the guest servers on a given host.

Network Management Difficulties
When organizations initially begin to virtualize their servers, they’re often surprised by how difficult it can be to manage those virtual servers using their legacy network management software. While any decent network management application will perform application metering, compile a software inventory, and allow remote control sessions for both physical and virtual servers, there are some areas in which traditional network management software is not well-equipped to deal with VMs.

One example of such a problem is that most of the network management products on the market are designed to compile a hardware inventory of all managed computers. If such an application is not virtualization-aware, then the hardware inventory will be misreported.

Likewise, some of the network management applications on the market track server performance, but performance metrics can be greatly skewed in a virtual server environment. While the skewed data may not be a problem in and of itself, it is important to remember that some network management products contain elaborate alerting and automated remediation mechanisms that engage when certain performance problems are detected. These types of mechanisms can wreak havoc on virtual servers.

Finally, legacy network management software is not able to tell you on which host machine a virtual server is currently running. It also lacks the ability to move virtual servers between hosts. While most virtualization products come with their own management consoles, it’s far more efficient to manage physical and virtual servers through a single console.

Virtual Server Sprawl
So far I have talked about various logistical and performance issues associated with managing a virtual data center. Believe it or not, though, a virtual server deployment that works a little too well can be just as big a problem. Some organizations find virtualization to be so effective, that virtual server sprawl ends up becoming an issue.

One organization ended up deploying so many virtual servers that it ended up with more server hardware than it had before it decided to consolidate its servers. This completely undermined its stated goal of reducing hardware costs.

For other organizations, virtual machine sprawl has become a logistical nightmare, as virtual servers are created so rapidly that it becomes difficult to keep track of each one’s purpose, and of which ones are currently in use.

There are some key practices to help avoid virtual server sprawl. One of them is helping management and administrative staff to understand that there are costs associated with deploying virtual servers. Many people I have talked to think of virtual servers as being free because there are no direct hardware costs, and in some cases there’s no cost for licensing the server’s OS. However, most virtual servers do incur licensing costs in the form of anti-virus software, backup agents and network management software. These are in addition to the cost of the license for whatever application the virtual server is running. There are also indirect costs associated with things like system maintenance and hardware resource consumption.

Another way to reduce the potential for VM sprawl is educating the administrative staff on some of the dangers of excessive VM deployments. By its very nature, IT tends to be reactive. I have lost count of the number of times when I have seen a virtual server quickly provisioned in response to a manager’s demands. Such deployments tend to be performed in a haphazard manner because of the pressure to bring a new virtual server online quickly. These types of deployments can undermine security, and may impact an organization’s regulatory compliance status.

Learning New Skills
One potential virtualization pitfall often overlooked is the requirement for the IT staff to learn new skills.

“Before deploying virtualization solutions, we encourage our customers to include storage and networking disciplines into the design process,” says Bill Carovano, technical director for the Datacenter and Cloud Division at Citrix Systems Inc. “We’ve found that a majority of our support calls for XenServer tend to deal with storage and networking integration.”

Virtualization administrators frequently find themselves having to learn about storage and networking technologies, such as Fibre Channel, that connect VMs to networked storage. The issue of learning new skill sets is particularly problematic in siloed organizations where there’s a dedicated storage team, a dedicated networking team and a dedicated virtualization team.

One way Citrix is trying to help customers with such issues is through the introduction of a feature in XenServer Essentials called StorageLink. StorageLink is designed to reduce the degree to which virtualization and storage administrators must work together. It allows the storage admins to provide virtualization admins with disk space that can be sub-divided and used on an as-needed basis.

In spite of features such as StorageLink, administrators in siloed environments must frequently work together if an organization’s virtualization initiative is to succeed. “A virtualization administrator with one of our customers was using XenServer with a Fibre Channel storage array, and was experiencing performance problems with some of the virtual machines,” explains Carovano.

He continues: “After working with the storage admin, it turned out that the root of the problem was that the VMs were located on a LUN cut from relatively slow SATA disks. A virtualization administrator who just looked at an array as a ‘black box’ would have had more difficulty tracking down the root cause.”

Underestimating the Required Number of Hosts
Part of the capacity planning process involves determining how many host servers are going to be required. However, administrators who are new to virtualization often fail to realize that hardware resources are not the only factor in determining the number of required host servers. There are some types of virtual servers that simply should not be grouped together. For example, I once saw an organization place all of its domain controllers (DCs) on a single host. If that host failed, there would be no DCs remaining on the network.

One of the more comical examples of poor planning that I have seen was an organization that created a virtual failover cluster. The problem was that all of the cluster nodes were on the same host, which meant that the cluster was not fault tolerant.

My point is that virtual server placement is an important part of the capacity planning process. It isn’t enough to consider whether or not a host has the hardware resources to host a particular VM. You must also consider whether placing a virtual server on a given host eliminates any of the redundancy that has intentionally been built into the network.

Multiple Eggs into a Single Basket
On a similar note, another common virtualization pitfall is the increasingly high-stakes game of server management. A server failure in a non-virtualized data center is inconvenient, but not typically catastrophic. The failure of a host server in a virtual data center can be a different issue altogether, because the failure of a single host can mean the unavailability of multiple virtual servers.

I’ll concede that both VMware Inc. and Microsoft offer high-availability solutions for virtual data centers, but it’s worth noting that not all organizations are taking advantage of these solutions. Besides, sometimes it’s the virtualization software that ends up causing the problem. Take for instance a situation that recently faced Troy Thompson, of the Department of Defense Education Activity division.

Thompson was running VMware ESX version 3.5, and decided to upgrade his host servers to version 4.0. While the upgrade itself went smoothly, there were nine patches that needed to be applied to the servers when the upgrade was complete. Unfortunately, the servers crashed after roughly a third of the patches had been applied. Although the virtual servers themselves were unharmed, the crash left the host servers in an unbootable state. Ultimately, VMware ESX 4.0 had to be reinstalled from scratch.

My point is that in this particular situation, a routine upgrade caused a crash that resulted in an extended amount of downtime for three virtual servers. In this case, all three of the virtual servers were running mission-critical applications: a Unity voice mail system, and two Cisco call managers. Granted, these servers were scheduled to be taken offline for maintenance, but because of the problems with the upgrade, the servers were offline for much longer than planned. This situation might have been avoided had the upgrade been tested in a lab.

Best Practice Recommendations
I do not claim to have all of the answers to creating a standardized set of best practices for virtualization. Even so, here are a few of my own recommended best practices.

Test Everything Ahead of Time
I’ve always been a big believer in testing upgrades and configuration changes in a lab environment prior to making modifications to production servers. Using this approach helps to spot potential problems ahead of time.

Although lab testing works more often than not, experience has shown me that sometimes lab servers do not behave identically to their production counterparts. There are several reasons why this occurs. Sometimes an earlier modification might have been made to a lab server, but not to a production box, or vice versa. Likewise, lab servers do not handle the same workload as a production server, and they usually run on less-powerful hardware.

When it comes to your virtual data center, though, there may be a better way of testing host server configuration changes. Most larger organizations today seem to think of virtualization hosts less as servers, and more as a pool of resources that can be allocated to VMs. As such, it’s becoming increasingly common to have a few well-equipped but currently unused host servers online. These servers make excellent candidates for testing host-level configuration changes because they should be configured identically to the other host servers on the network, and are usually equipped with comparable hardware.

Some Servers Not Good for Virtualization
Recently, I’ve seen a couple of different organizations working toward trying to virtualize every server in their entire data center. The idea behind this approach isn’t so much about server consolidation as it is about fault tolerance and overall flexibility.

Consider, for example, a database server that typically caries a heavy workload. Such a server would not be a good candidate for consolidation, because the server’s hardware is not being underutilized. If such a server were virtualized, it would probably have to occupy an entire host all by itself in order to maintain the required level of performance. Even so, virtualizing the server may not be a bad idea because doing so may allow it to be easily migrated to more powerful hardware as the server’s workload increases in the future.

At the same time, there are some servers in the data center that are poor candidates for virtualization. For example, some software vendors copy-protect their applications by requiring USB-based hardware keys. Such keys typically won’t work with a virtual server. Generally speaking, any server that makes use of specialized hardware is probably going to be a poor virtualization candidate. Likewise, servers with complex storage architecture requirements may also make poor virtualization candidates because moving such a server from one host to another may cause drive mapping problems.

Virtualization technology continues to improve, so I expect that in a few years fully virtualized data centers will be the norm. For right now, though, it’s important to accept that some servers should not be virtualized.

Consider Replacing Your Network Management Software
As I stated earlier, legacy network management software is often ill-equipped to manage both physical and virtual servers. As such, virtual server-aware management software is usually a wise investment.

Avoid Over-Allocating Server Resources
It’s important to keep in mind that each host server contains a finite set of hardware resources. Some of the virtualization products on the market will allow you to over-commit the host server’s resources, but doing so is almost always a bad idea. Microsoft Hyper-V Server, for example, has a layer of abstraction between virtual CPUs and Logical CPUs (which map directly to the number of physical CPU cores installed in the server). Because of this abstraction, it’s possible to allocate more virtual CPUs than the server has logical CPUs.

Choosing not to over-commit hardware resources is about more than just avoiding performance problems; it’s about avoiding surprises. For example, imagine that a virtual server has been allocated two virtual CPUs, and that both of those virtual CPUs correspond to physical CPU cores. If you move that virtual server to a different host, you can be relatively sure that its performance will be similar to what it was on its previous host so long as the same hardware resources are available on the new server. Once moved, the virtual server might be a little bit faster or a little bit slower, but there shouldn’t be a major difference in the way that it performs, assuming that the underlying hardware is comparable.

Now, imagine what would happen if you moved the virtual server to a host whose processor cores were already spoken for. The virtualization software would still allocate CPU resources to the recently moved server, but now its performance is directly tied to other virtual servers’ workloads, making it impossible to predict how any of the virtual servers will perform at a given moment.

As you can see, there is much more to server virtualization than meets the eye. Virtualization is an inexact science with numerous potential pitfalls that can only be avoided through proper planning and testing.

  • Source: Redmondmag.com  By Brien Posey

Integrating Dell EqualLogic SANS with Citrix XenServer

2017-07-27T00:01:11+00:00 May 21st, 2010|Uncategorized|

INTEGRATING DELL EQUALLOGIC SANS WITH CITRIX XENSERVER

VIRTUALIZED STORAGE TO OPTIMIZE THE XENSERVER ENVIRONMENT

Server virtualization can offer strategic value to organizations in a number of arenas. By creating an abstraction layer between operating systems and physical hardware, IT administrators can consolidate server capacity, parcel out computing resources as needed, and streamline system provisioning and deployment, all while improving service levels and network security. Server virtualization also facilitates support for multiple operating systems, broadened choices among vendors and solutions, and employee empowerment across organizations, regardless of location.

In implementing virtualization solutions, however, IT managers often overlook a major opportunity: the integration of the virtualization platform and the shared storage backend. The result of this oversight: two critical components that effectively operate as discrete silos, creating new inefficiencies and increasing administrative workloads.

SAN AND SERVER MANAGEMENT VIA A SINGLE CONSOLE

To address this problem, Citrix and Dell have introduced the next generation of virtualization and storage with the Citrix XenServer Adapter for Dell EqualLogic PS Series SAN arrays. Available as part of Citrix XenServer 5.0 Dell Edition, this module allows IT administrators to hand off storage virtualization operations from the server virtualization software over to the EqualLogic SAN, for effective handling and superb overall performance.

The adapter integrates EqualLogic control interfaces directly into the XenCenter Management Client, helping improve overall system performance, enabling more efficient disk utilization, and realizing more completely the benefits of storage consolidation. The integration also leverages the automated features designed into both the XenServer and the PS Series arrays, reducing administrator workloads and increasing efficiency over more conventional, stove-piped deployments. 

Through this partnered integration, Dell and Citrix offer organizations the full benefit of virtualization, including centralized storage, live migration, high availability, realtime streaming and improved management of workload and life-cycle costs.

VIRTUALIZED STORAGE FOR THE VIRTUALIZED ENVIRONMENT

With their ease-of-use, storage virtualization, and automation features, EqualLogic SANs provide a flexible means for managing storage resources, gracefully scaling, and reducing overall complexity, resulting in low total costs of ownership (TCO). When deployed within a XenServer environment, EqualLogic SANs can simplify the tasks and routines by which applications and data are stored and protected. Unlike other SAN platforms, the EqualLogic PS Series arrays share processor and storage resources dynamically, and perform load-balancing continuously, allowing more efficient implementation of these vital resources.

The Citrix XenServer Adapter for Dell EqualLogic capitalizes on this intelligence and goes even further, allowing simple management of these resources — storage provisioning, intelligent backup, rapid recovery, and capacity growth — live in production environments, with no application interruption or downtime. The XenServer Direct Storage Adapter enables IT administrators to perform unique EqualLogic capabilities through the Citrix XenCenter Management Client, automating the creation and assignment of dedicated storage volumes to each Virtual Machine (VM), without the manual work required by classic direct-storage mapping technologies.

As an integrated virtualization solution, XenServer and EqualLogic maintain high operating efficiency by delegating such advanced capabilities as Thin Provisioning, Fast Cloning, and Automated Snapshots to the EqualLogic SAN. Thin Provisioning helps IT administrators control costs by dedicating only the storage capacity needed in the short term, and maintaining unallocated storage in a common pool for later use by applications or user groups as disk resources are actually consumed. Fast Cloning lets storage administrators create copies of entire volumes (e.g., virtual drives or LUNs) as a background process, without disrupting network operations. Once created, clones can be used to accelerate the provisioning and deployment of standardized VMs, as well as to test new applications, configurations or procedures. Snapshots are space-efficient, point-in-time captures of storage volumes that can be created without disrupting network operations, for use in backing up or testing data.

In addition, XenServer supports iSCSI multipath I/O (MPIO) and simplified disaster recovery, two strategic tools for improving business continuity even in the event of network failures or other outages. MPIO support allows multiple networkpaths — e.g., separate subnetworks or VLANS — for both the SAN arrays and the virtualization servers, as a means of both improving performance and safeguarding against Ethernet switch failures or other network problems. Disaster recovery tools apply snapshot and fast cloning technologies to the processes of initial VM placement, the real-time movement of VMs via XenMotion, and automatic high availability.

CITRIX XENSERVER DELL EDITION: A POWERFUL VIRTUALIZATION SOLUTION

Dell and Citrix have partnered to bring virtualization ready platforms for today’s dynamic and growing data centers. With the 64-bit open-source Xen hypervisor at its core, Citrix XenServer Dell Edition is a powerful virtualization solution that enables efficient resource consolidation, utilization, dynamic provisioning, and integrated systems management. XenServer Dell Edition has a small footprint and is optimized to run from an internal flash storage in Dell PowerEdge servers.

EqualLogic SANs deliver the benefits of consolidated networked storage in a self-managing, iSCSI storage area network that is affordable and easy to use, regardless of scale. By eliminating complex tasks and enabling fast and flexible storage provisioning, EqualLogic solutions can reduce the costs of storage acquisition and ongoing operations.

Citrix XenServer Dell Edition is certified and fully supported by Dell for select server and storage configurations. Citrix XenServer Dell Edition comes pre-installed with Dell OpenManage Server Administrator, which enables systems management right out of the box without any additional need to install an agent on the host.

Source: www.equallogic.com

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