Click here to close now.




Welcome!

@CloudExpo Authors: Pat Romanski, Roger Strukhoff, Liz McMillan, Scott Allen, Elizabeth White

Related Topics: Containers Expo Blog

Containers Expo Blog: Article

"Virtualization Is Now a Key Strategic Theme," Says Citrix CTO

Exclusive Q&A with Simon Crosby, CTO of Citrix & Founder of XenSource

"Virtualization is already widely used, but primarily for the first-order benefit, namely server consolidation," notes Citrix CTO Simon Crosby, in this Exclusive Q&A with SYS-CON's Virtualization Journal. "The second-order benefits of agility, availability and manageability of the IT stack are now becoming better understood," Crosby continues, "and as a consequence virtualization has moved from a tactical tool for gaining immediate savings, to become a key strategic theme for every IT department."

About Simon Crosby:
Now CTO of Citrix Systems, Simon Crosby was founder and CTO of XenSource prior to the acquisition of XenSource by Citrix. Prior to XenSource, he was a principal engineer at Intel where he led strategic research in distributed autonomic computing, platform security and trust. In 2007, he was awarded a coveted spot as one of InfoWorld’s Top 25 CTOs.

Virtualization Journal: Starting at 35,000 ft…where does the Xen hypervisor fit in the virtualization universe?
Simon Crosby: The Xen hypervisor is the industry’s most strategic code base for virtualization. Why? First, it is a tiny, optimized, open source reference standard hypervisor for a wide range of CPU architectures, with extensive support for high performance virtualization-enhanced CPUs and I/O subsystems. Because it has multiple routes to market in any given year, the hardware manufacturers ensure that Xen has “first and best” support for the latest hardware, ensuring that it always leads the industry in scalability and performance. In addition:
  • It is collaboratively built by the industry’s leading IT vendors, led by Citrix and including Intel, AMD, IBM, HP, Novell, Red Hat, Sun, VA Linux and many others.
  • The Xen security architecture is contributed by the security community, including researchers, IBM’s secure hypervisor project, the NSA and DoD.
  • Xen is used in the world’s largest virtualization deployments, for example by Amazon, with a deployment of thousands of servers virtualized using Xen.
  • The Microsoft Hyper-V hypervisor is in fact an implementation of the Xen reference architecture, built by Microsoft, and compatible with Citrix XenServer.
Virtualization Journal: The first public release of Xen was made available in 2003, how long did it take for you and your Cambridge collaborators to get it to that stage?
Crosby: The Xen code base has been in development now for seven years. When we started XenSource, we had released Xen 2.5, and were working on Xen 3.0.

Virtualization Journal:
What was and is the relationship between XenSource, Inc. and the Xen project?
Crosby: XenSource’s founders – all former University of Cambridge faculty who developed Xen in their research – decided that the Xen hypervisor needed a company to support its ongoing development when large users of Xen told us that we needed to build a complete product offering based on Xen so they could be confident that their commercial deployments would have the backing of a commercial entity.

Virtualization Journal: XenSource still hosts the xen.org site – what’s the situation there, since the Citrix acquisition? Will the community and its processes continue to be respected?
Simon Crosby: XenSource is part of Citrix – indeed XenSource is no longer a formal entity at all. Citrix hosts xen.org for the community, but it is run entirely separately from all of our product development activity. The community site at www.xen.org has its own program manager, tasked with serving the community and the Xen project Advisory Board.


The board oversees the day-to-day project management processes, and sets policies such as the trademark policy for the Xen® brand. The advisory board members come from Intel, IBM, HP, Novell, Red Hat and Sun, and the Chair is Ian Pratt, the Xen project leader, from Citrix. Citrix has already invested heavily in additional headcount on Xen, and is a sponsor of the upcoming Xen Summit, to be held in conjunction with Usenix in Boston, in June.


Virtualization Journal: If paravirtualization equals second-generation virtualization, what will third-generation virtualization look like?
Simon Crosby: From a hypervisor architecture perspective, there is very little left to “optimize away” in the way that paravirtualization allows us to slim down the code base. What will happen is that all of the data center infrastructure, from CPUs to memory management, to I/O chipsets and even storage subsystems will become “virtualization aware” and assist with the job of speeding up what formerly had to be done either in the hypervisor or the virtualization stack that drives it.

Within the next year, I/O Virtualization (often called IOV) standardized by the PCI SIG will start to be supported by fabric and I/O card vendors. This allows optimized fast-path I/O between guests and hardware in a virtualization-safe manner, without needing to use the driver stack offered by the virtualization platform itself. This effectively removes most of the remaining overhead of virtualization. We recently demonstrated XenServer with a performance of about 10,000 iSCSI IOPS on a 10Gb/s IOV card from SolarFlare, for example. This means that the most challenging workloads can now be virtualized.


Virtualization Journal: How about embedded hypervisors, what’s the future trajectory there?
Crosby: Citrix XenServer is now an add-in option at point of sale on over 50 percent of x86 servers worldwide. We recently announced a jointly developed embedded product with HP for ProLiant servers that HP refers to as its “preferred embedded virtualization option for ProLiant.” Putting the virtualization platform in hardware is, in our view, the next natural progression for the industry, since OEMs can leverage the capabilities of the hardware through their add-on systems management stacks to offer customers powerful, seamless management for virtualization as a built-in component of the management stack.

For customers, this is the cheapest and highest performance virtualization offering available, and it has the full benefit of complete integration with all of HP’s management tools. At the same time, Microsoft with Hyper-V in the OS, and the Linux vendors with Xen have the opportunity to leverage the same code base through a different delivery model, where the OS virtualizes more instances of that OS, or other guests. This model is still in its early stages – the Linux vendors don’t virtualize Windows well, and Microsoft Hyper-V doesn’t support Linux particularly well.



Virtualization Journal: It has inevitably been said that 2008 is, at long last, The Year of Virtualization. What do you think took everyone in Enterprise IT so long?
Crosby: Enterprise IT has not been standing still. Indeed virtualization is already widely used, but primarily for the first-order benefit, namely server consolidation. The second-order benefits of agility, availability and manageability of the IT stack are now becoming better understood, and as a consequence virtualization has moved from a tactical tool for gaining immediate savings, to become a key strategic theme for every IT department.

But there is also another key factor that changes in 2008. Until this year the competition in the market was really only VMware and XenSource – a tiny startup. The acquisition by Citrix gives our product, XenServer, a huge channel, a large investment in features, additional value-added functions that leverage Xen, 24x7 worldwide support and all the clout needed to serve true enterprise customers and use cases. As we go to market with XenServer, we also collaborate closely with Microsoft, who will deliver Hyper-V to market in the summer. Our intention is to leverage both footprints to deliver powerful virtualization-optimized solutions to customers for data-center automation, virtual desktop infrastructure and application delivery. Citrix products XenServer, XenDesktop and XenApp, all contain virtualization as a core feature set (server, desktop and application, respectively).

Until 2008, VMware was the only choice, their hypervisor cost thousands of dollars, and they had the market to themselves. In 2008, Citrix and Microsoft bring customers an open architecture, a price/performance and feature set that is difficult to beat, and a powerful channel that can deliver customers a real choice for their virtual infrastructure for the first time. Importantly, our products will all also add value to VMware virtualized infrastructure, to fully support customers that have purchased VMware enterprise licenses.

It will be a very exciting year!

Virtualization Journal: What’s the risk of Virtualization becoming just another buzzword used in the attempt to get organizations to “sign a check”?
Crosby: The word is already over-used, and every vendor wants a “virtualization spin” on their product. Customers are smart though, and I think they understand that first and foremost they need to pick a hypervisor. There’s VMware, or the compatible pair of Xen and Microsoft Hyper-V. Second, there’s virtualized storage. We believe that there will be tremendous innovation in the storage area to optimize the management of storage for virtual machines in hardware, as opposed to doing this in software on the host, as VMware does. Third, there are dynamic infrastructure software services that:
  • Provision virtual machines – we offer dynamic provisioning on XenServer, Hyper-V, VMware and (crucially) on bare metal
  • Optimize performance of virtual machines on the infrastructure through workflow based automated provisioning
  • Protect virtual machines by offering them high-availability or even fault-tolerance
  • Manage VM lifecycle
This area of virtualization management is an area rich with innovation that can exploit XenServer or Hyper-V to deliver powerful new choices to customers. There is a lot of hot air in vendors’ pitches right now, and customers should really look under the covers to understand the ROI before they purchase new tools.


Virtualization Journal:
The Xen AB currently has members from Citrix, IBM, Intel, HP, Novell, Red Hat and Sun – is it likely that further companies would get onto the Advisory Board?
Crosby: The AB is drawn from the top contributors to Xen, and includes the first key vendors that delivered the Xen hypervisor to market. As new vendors join the ranks of those that ship Xen to customers, I expect the AB will grow, since those vendors have a strategic interest in Xen’s continued prominence.

Virtualization Journal:
You’ve been hailed as one of the top 25 CTOs in the industry: what duty or duties of care do you feel such acclaim brings with it for a top software executive in the first decade of the twenty-first century? Is the ‘IT greening’ aspect of virtualization important to you, for example?
Crosby: I am incredibly fortunate to be in a position that allows me to advocate a technology and community that I find inspiring. The community builds the world’s best hypervisor using a development model based on collaborative contribution without charge. Xen is great because its community makes it great and makes it freely available.

The impact of Xen in a global sense, beyond vendors and products, has been to slash the price of virtualization, making it a free feature set available to everyone. Server consolidation should be free, because it makes a powerful contribution to the greening of IT. To the Xen community goes the credit for a powerful, open, collaborative development spirit that will have a tremendous worldwide impact on power consumption and therefore global warming.

More Stories By Jeremy Geelan

Jeremy Geelan is Chairman & CEO of the 21st Century Internet Group, Inc. and an Executive Academy Member of the International Academy of Digital Arts & Sciences. Formerly he was President & COO at Cloud Expo, Inc. and Conference Chair of the worldwide Cloud Expo series. He appears regularly at conferences and trade shows, speaking to technology audiences across six continents. You can follow him on twitter: @jg21.

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@CloudExpo Stories
Predictive analytics tools monitor, report, and troubleshoot in order to make proactive decisions about the health, performance, and utilization of storage. Most enterprises combine cloud and on-premise storage, resulting in blended environments of physical, virtual, cloud, and other platforms, which justifies more sophisticated storage analytics. In his session at 18th Cloud Expo, Peter McCallum, Vice President of Datacenter Solutions at FalconStor, discussed using predictive analytics to mon...
The cloud promises new levels of agility and cost-savings for Big Data, data warehousing and analytics. But it’s challenging to understand all the options – from IaaS and PaaS to newer services like HaaS (Hadoop as a Service) and BDaaS (Big Data as a Service). In her session at @BigDataExpo at @ThingsExpo, Hannah Smalltree, a director at Cazena, provided an educational overview of emerging “as-a-service” options for Big Data in the cloud. This is critical background for IT and data profession...
The initial debate is over: Any enterprise with a serious commitment to IT is migrating to the cloud. But things are not so simple. There is a complex mix of on-premises, colocated, and public-cloud deployments. In this power panel at 18th Cloud Expo, moderated by Conference Chair Roger Strukhoff, Randy De Meno, Chief Technologist - Windows Products and Microsoft Partnerships at Commvault; Dave Landa, Chief Operating Officer at kintone; William Morrish, General Manager Product Sales at Interou...
In addition to all the benefits, IoT is also bringing new kind of customer experience challenges - cars that unlock themselves, thermostats turning houses into saunas and baby video monitors broadcasting over the internet. This list can only increase because while IoT services should be intuitive and simple to use, the delivery ecosystem is a myriad of potential problems as IoT explodes complexity. So finding a performance issue is like finding the proverbial needle in the haystack.
Cloud Expo, Inc. has announced today that Andi Mann returns to 'DevOps at Cloud Expo 2016' as Conference Chair The @DevOpsSummit at Cloud Expo will take place on November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. "DevOps is set to be one of the most profound disruptions to hit IT in decades," said Andi Mann. "It is a natural extension of cloud computing, and I have seen both firsthand and in independent research the fantastic results DevOps delivers. So I am excited t...
When it comes to cloud computing, the ability to turn massive amounts of compute cores on and off on demand sounds attractive to IT staff, who need to manage peaks and valleys in user activity. With cloud bursting, the majority of the data can stay on premises while tapping into compute from public cloud providers, reducing risk and minimizing need to move large files. In his session at 18th Cloud Expo, Scott Jeschonek, Director of Product Management at Avere Systems, discussed the IT and busin...
The pace of innovation, vendor lock-in, production sustainability, cost-effectiveness, and managing risk… In his session at 18th Cloud Expo, Dan Choquette, Founder of RackN, discussed how CIOs are challenged finding the balance of finding the right tools, technology and operational model that serves the business the best. He also discussed how clouds, open source software and infrastructure solutions have benefits but also drawbacks and how workload and operational portability between vendors ...
Apixio Inc. has raised $19.3 million in Series D venture capital funding led by SSM Partners with participation from First Analysis, Bain Capital Ventures and Apixio’s largest angel investor. Apixio will dedicate the proceeds toward advancing and scaling products powered by its cognitive computing platform, further enabling insights for optimal patient care. The Series D funding comes as Apixio experiences strong momentum and increasing demand for its HCC Profiler solution, which mines unstruc...
"My role is working with customers, helping them go through this digital transformation. I spend a lot of time talking to banks, big industries, manufacturers working through how they are integrating and transforming their IT platforms and moving them forward," explained William Morrish, General Manager Product Sales at Interoute, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
The Internet of Things will challenge the status quo of how IT and development organizations operate. Or will it? Certainly the fog layer of IoT requires special insights about data ontology, security and transactional integrity. But the developmental challenges are the same: People, Process and Platform and how we integrate our thinking to solve complicated problems. In his session at 19th Cloud Expo, Craig Sproule, CEO of Metavine, will demonstrate how to move beyond today's coding paradigm ...
Internet of @ThingsExpo has announced today that Chris Matthieu has been named tech chair of Internet of @ThingsExpo 2016 Silicon Valley. The 6thInternet of @ThingsExpo will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
SaaS companies can greatly expand revenue potential by pushing beyond their own borders. The challenge is how to do this without degrading service quality. In his session at 18th Cloud Expo, Adam Rogers, Managing Director at Anexia, discussed how IaaS providers with a global presence and both virtual and dedicated infrastructure can help companies expand their service footprint with low “go-to-market” costs.
So you’ve heard how click-to-call widgets can really enhance a website’s potential for customer interaction and you want to try it out for yourself. Or you’re considering offloading pieces of your VoIP infrastructure, but want to see how that would unfold first. Where can you find this technology, that’s free and available to try out? Spotting the potential in a space where customers can experiment with these types of features, Voxbone is launching The Workshop.
The cloud market growth today is largely in public clouds. While there is a lot of spend in IT departments in virtualization, these aren’t yet translating into a true “cloud” experience within the enterprise. What is stopping the growth of the “private cloud” market? In his general session at 18th Cloud Expo, Nara Rajagopalan, CEO of Accelerite, explored the challenges in deploying, managing, and getting adoption for a private cloud within an enterprise. What are the key differences between wh...
SYS-CON Events has announced today that Roger Strukhoff has been named conference chair of Cloud Expo and @ThingsExpo 2016 Silicon Valley. The 19th Cloud Expo and 6th @ThingsExpo will take place on November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. "The Internet of Things brings trillions of dollars of opportunity to developers and enterprise IT, no matter how you measure it," stated Roger Strukhoff. "More importantly, it leverages the power of devices and the Interne...
"We work in the area of Big Data analytics and Big Data analytics is a very crowded space - you have Hadoop, ETL, warehousing, visualization and there's a lot of effort trying to get these tools to talk to each other," explained Mukund Deshpande, head of the Analytics practice at Accelerite, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
The idea of comparing data in motion (at the sensor level) to data at rest (in a Big Data server warehouse) with predictive analytics in the cloud is very appealing to the industrial IoT sector. The problem Big Data vendors have, however, is access to that data in motion at the sensor location. In his session at @ThingsExpo, Scott Allen, CMO of FreeWave, discussed how as IoT is increasingly adopted by industrial markets, there is going to be an increased demand for sensor data from the outermos...
As organizations shift towards IT-as-a-service models, the need for managing and protecting data residing across physical, virtual, and now cloud environments grows with it. Commvault can ensure protection, access and E-Discovery of your data – whether in a private cloud, a Service Provider delivered public cloud, or a hybrid cloud environment – across the heterogeneous enterprise. In his general session at 18th Cloud Expo, Randy De Meno, Chief Technologist - Windows Products and Microsoft Part...
Dialogic has announced that ZVRS chose Dialogic® PowerMedia™ XMS software media server as part of its latest video relay and translation service offering. ZVRS uses Dialogic’s PowerMedia XMS technology to provide a robust solution that supports a broad range of legacy devices and any-to-any video capabilities with its flagship Z70 videophone. ZVRS selected Dialogic’s solution to facilitate a release of Z70 that met its stringent requirements for legacy device support (H.263 and H.264) with high...
CenturyLink has announced that application server solutions from GENBAND are now available as part of CenturyLink’s Networx contracts. The General Services Administration (GSA)’s Networx program includes the largest telecommunications contract vehicles ever awarded by the federal government. CenturyLink recently secured an extension through spring 2020 of its offerings available to federal government agencies via GSA’s Networx Universal and Enterprise contracts. GENBAND’s EXPERiUS™ Application...