Click here to close now.


Containers Expo Blog Authors: Carmen Gonzalez, Liz McMillan, Yakov Fain, XebiaLabs Blog, AppDynamics Blog

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 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 for the community, but it is run entirely separately from all of our product development activity. The community site at 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.

@ThingsExpo Stories
WebRTC services have already permeated corporate communications in the form of videoconferencing solutions. However, WebRTC has the potential of going beyond and catalyzing a new class of services providing more than calls with capabilities such as mass-scale real-time media broadcasting, enriched and augmented video, person-to-machine and machine-to-machine communications. In his session at @ThingsExpo, Luis Lopez, CEO of Kurento, will introduce the technologies required for implementing these ideas and some early experiments performed in the Kurento open source software community in areas ...
Too often with compelling new technologies market participants become overly enamored with that attractiveness of the technology and neglect underlying business drivers. This tendency, what some call the “newest shiny object syndrome,” is understandable given that virtually all of us are heavily engaged in technology. But it is also mistaken. Without concrete business cases driving its deployment, IoT, like many other technologies before it, will fade into obscurity.
SYS-CON Events announced today that Dyn, the worldwide leader in Internet Performance, will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Dyn is a cloud-based Internet Performance company. Dyn helps companies monitor, control, and optimize online infrastructure for an exceptional end-user experience. Through a world-class network and unrivaled, objective intelligence into Internet conditions, Dyn ensures traffic gets delivered faster, safer, and more reliably than ever.
Today air travel is a minefield of delays, hassles and customer disappointment. Airlines struggle to revitalize the experience. GE and M2Mi will demonstrate practical examples of how IoT solutions are helping airlines bring back personalization, reduce trip time and improve reliability. In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect with GE, and Dr. Sarah Cooper, M2Mi's VP Business Development and Engineering, will explore the IoT cloud-based platform technologies driving this change including privacy controls, data transparency and integration of real time context w...
The IoT market is on track to hit $7.1 trillion in 2020. The reality is that only a handful of companies are ready for this massive demand. There are a lot of barriers, paint points, traps, and hidden roadblocks. How can we deal with these issues and challenges? The paradigm has changed. Old-style ad-hoc trial-and-error ways will certainly lead you to the dead end. What is mandatory is an overarching and adaptive approach to effectively handle the rapid changes and exponential growth.
Who are you? How do you introduce yourself? Do you use a name, or do you greet a friend by the last four digits of his social security number? Assuming you don’t, why are we content to associate our identity with 10 random digits assigned by our phone company? Identity is an issue that affects everyone, but as individuals we don’t spend a lot of time thinking about it. In his session at @ThingsExpo, Ben Klang, Founder & President of Mojo Lingo, will discuss the impact of technology on identity. Should we federate, or not? How should identity be secured? Who owns the identity? How is identity ...
The buzz continues for cloud, data analytics and the Internet of Things (IoT) and their collective impact across all industries. But a new conversation is emerging - how do companies use industry disruption and technology enablers to lead in markets undergoing change, uncertainty and ambiguity? Organizations of all sizes need to evolve and transform, often under massive pressure, as industry lines blur and merge and traditional business models are assaulted and turned upside down. In this new data-driven world, marketplaces reign supreme while interoperability, APIs and applications deliver un...
Electric power utilities face relentless pressure on their financial performance, and reducing distribution grid losses is one of the last untapped opportunities to meet their business goals. Combining IoT-enabled sensors and cloud-based data analytics, utilities now are able to find, quantify and reduce losses faster – and with a smaller IT footprint. Solutions exist using Internet-enabled sensors deployed temporarily at strategic locations within the distribution grid to measure actual line loads.
The Internet of Everything is re-shaping technology trends–moving away from “request/response” architecture to an “always-on” Streaming Web where data is in constant motion and secure, reliable communication is an absolute necessity. As more and more THINGS go online, the challenges that developers will need to address will only increase exponentially. In his session at @ThingsExpo, Todd Greene, Founder & CEO of PubNub, will explore the current state of IoT connectivity and review key trends and technology requirements that will drive the Internet of Things from hype to reality.
The Internet of Things (IoT) is growing rapidly by extending current technologies, products and networks. By 2020, Cisco estimates there will be 50 billion connected devices. Gartner has forecast revenues of over $300 billion, just to IoT suppliers. Now is the time to figure out how you’ll make money – not just create innovative products. With hundreds of new products and companies jumping into the IoT fray every month, there’s no shortage of innovation. Despite this, McKinsey/VisionMobile data shows "less than 10 percent of IoT developers are making enough to support a reasonably sized team....
You have your devices and your data, but what about the rest of your Internet of Things story? Two popular classes of technologies that nicely handle the Big Data analytics for Internet of Things are Apache Hadoop and NoSQL. Hadoop is designed for parallelizing analytical work across many servers and is ideal for the massive data volumes you create with IoT devices. NoSQL databases such as Apache HBase are ideal for storing and retrieving IoT data as “time series data.”
Today’s connected world is moving from devices towards things, what this means is that by using increasingly low cost sensors embedded in devices we can create many new use cases. These span across use cases in cities, vehicles, home, offices, factories, retail environments, worksites, health, logistics, and health. These use cases rely on ubiquitous connectivity and generate massive amounts of data at scale. These technologies enable new business opportunities, ways to optimize and automate, along with new ways to engage with users.
The IoT is upon us, but today’s databases, built on 30-year-old math, require multiple platforms to create a single solution. Data demands of the IoT require Big Data systems that can handle ingest, transactions and analytics concurrently adapting to varied situations as they occur, with speed at scale. In his session at @ThingsExpo, Chad Jones, chief strategy officer at Deep Information Sciences, will look differently at IoT data so enterprises can fully leverage their IoT potential. He’ll share tips on how to speed up business initiatives, harness Big Data and remain one step ahead by apply...
There will be 20 billion IoT devices connected to the Internet soon. What if we could control these devices with our voice, mind, or gestures? What if we could teach these devices how to talk to each other? What if these devices could learn how to interact with us (and each other) to make our lives better? What if Jarvis was real? How can I gain these super powers? In his session at 17th Cloud Expo, Chris Matthieu, co-founder and CTO of Octoblu, will show you!
SYS-CON Events announced today that ProfitBricks, the provider of painless cloud infrastructure, will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. ProfitBricks is the IaaS provider that offers a painless cloud experience for all IT users, with no learning curve. ProfitBricks boasts flexible cloud servers and networking, an integrated Data Center Designer tool for visual control over the cloud and the best price/performance value available. ProfitBricks was named one of the coolest Clo...
As a company adopts a DevOps approach to software development, what are key things that both the Dev and Ops side of the business must keep in mind to ensure effective continuous delivery? In his session at DevOps Summit, Mark Hydar, Head of DevOps, Ericsson TV Platforms, will share best practices and provide helpful tips for Ops teams to adopt an open line of communication with the development side of the house to ensure success between the two sides.
SYS-CON Events announced today that IBM Cloud Data Services has been named “Bronze Sponsor” of SYS-CON's 17th Cloud Expo, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. IBM Cloud Data Services offers a portfolio of integrated, best-of-breed cloud data services for developers focused on mobile computing and analytics use cases.
SYS-CON Events announced today that Sandy Carter, IBM General Manager Cloud Ecosystem and Developers, and a Social Business Evangelist, will keynote at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA.
Developing software for the Internet of Things (IoT) comes with its own set of challenges. Security, privacy, and unified standards are a few key issues. In addition, each IoT product is comprised of at least three separate application components: the software embedded in the device, the backend big-data service, and the mobile application for the end user's controls. Each component is developed by a different team, using different technologies and practices, and deployed to a different stack/target - this makes the integration of these separate pipelines and the coordination of software upd...
Mobile messaging has been a popular communication channel for more than 20 years. Finnish engineer Matti Makkonen invented the idea for SMS (Short Message Service) in 1984, making his vision a reality on December 3, 1992 by sending the first message ("Happy Christmas") from a PC to a cell phone. Since then, the technology has evolved immensely, from both a technology standpoint, and in our everyday uses for it. Originally used for person-to-person (P2P) communication, i.e., Sally sends a text message to Betty – mobile messaging now offers tremendous value to businesses for customer and empl...