The science behind Virtual Machine Monitors, or VMM, aka Hypervisors, was demystified almost half a century ago, in a famous ACM publication, “Formal Requirements for Virtualizable Third Generation Architectures”.
In my life, I had the honor of working on some of the most bleeding edge virtualization technologies of their day. My first was IBM’s VM, VSAM and a host of other v-words. My last was at XenSource (now Citrix) and Cisco, on what I still think is the most complete hypervisor of our age, true to its theoretical foundation in the Math paper I just mentioned.
Though Xen is arguably the most widely used hypervisor in the Cloud or sum of all servers in the world today, I actually think its most interesting accomplishment lies in what its founders just announced this week. Therefore, I want to extend my congratulations to my good friends Simon Crosby and Ian Pratt for the admirable work at Bromium with vSentry.
I think it is remarkable for two reasons. It addresses the missing part of what hypervisors are useful, which is security; for those of you that actually read Popek & Goldberg’s paper, you would note that VMM’s are very good at intercepting not just privileged but also sensitive instructions, and very few people out there, until now have focused on the latter, the security piece. But there is one more reason, in fact the key point of this paper, the necessary and sufficient conditions for a system to be able to have a VMM or hypervisor, and I am hoping the Xen guys who have done so well articulating that for real (not fictional or hyped) hypervisors, can also help sort our the hype from fiction in what is ambiguously called nowadays a “network hypervisor”.
Could this approach be what is actually missing, to sort out truth from hype in what we call SDN today? Is this the new age of hypervisors? Or is this just another useful application of an un-hyped hypervisor?
Tags: Cisco, hypervisor, network, network hypervisor, open source, SDN, security, virtualization, vmm, Xen
By Dan Mathieson, Mayor, City of Stratford
Stratford, Ontario, is a city which has continued to grow and be successful even after multiple changes in industry have occurred. Although we are a city renowned for our Shakespeare Festival, we are also becoming a leader in digital media and infrastructure, as witnessed by the hosting of Canada 3.0 for the fourth time this year.
Canada 3.0 is an annual event which gathers representatives from private industry, government and academia, as well as startups, to discuss and exchange ideas around digital innovation in Canada, and more specifically, how to elevate Canada’s position in the global digital economy.
We have the ability to host a nationally significant event such as Canada 3.0 as a result of our strategy to invest in digital infrastructure and making it a major priority. Over the past five years, through Rhyzome Networks, a 50 km transmission grid of buried optical fibre has been installed – as well as a city-wide Wi-Fi network – which has made Stratford a leader in digital infrastructure. This has lead to Stratford becoming recognized over the past two years by the Intelligent Community Forum as one of the Top 7 Intelligent Communities in the world.
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Tags: customer voice, digital media, network, Wi-Fi network
Do you have an iPhone, Android, Samsung , or any other mobile phone? Not surprising since there will be 15 billion networked devices by 20151. With employees (yes, even IT themselves) bringing their mobile phones to work, businesses are seeing at least a doubling of mobile devices per employee; from laptop-only to laptop + mobile phone (+ tablet)2.
The IT department is faced with an increased burden on their existing wireless network, while securing email access from any platform and simultaneously ensuring an optimal, reliable user mobile experience. Offering a reliable, consistent user mobile experience used to be a luxury ask; today, it impacts employee productivity. Mobile employee productivity can range from wireless laptop access from conference rooms to roaming the within the building accessing corporate email from any mobile device. This is true for me (working at a large enterprise) and my husband (working at a medium-sized business).
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Tags: 802.11n, access point, Aironet, AP, byod, controller, Ironport, midmarket, midsize, mobile, mobility, network, networking, security, wi-fi, wireless
By Tine Christensen, Director of US Service Provider Practice, Cisco Internet Business Solutions Group (IBSG)
America’s healthcare system has been laid low with a scourge of acute symptoms. Spiraling costs, an epidemic of chronic diseases, and a spike in the senior demographic are all driving a mounting crisis. Throw in a gridlocked U.S. Congress and an unresolved regulatory climate, and a “miracle” cure seems a remote dream.
Lately, however, a healing light has been shining from a surprising source: service providers.
Tags: Cisco, collaboration, follow-up care, health care, healthcare, hospitals, IBSG, insurers, interactions, managed services, medical devices, network, partnerships, patient, preventive care, service providers, technology
The explosive growth of mobility has had a transformative impact in recent years. Increasingly, it is viewed not just as an industry force but as an overall economic lever, driving expansion on a GDP level.
This was a core theme of the 2012 Canadian Telecom Summit, which I attended last week in Toronto. Certainly, Canada itself is a prime example, and there was much discussion about the vital role mobile video and data have played as key enablers in Canada’s economy as a whole.
My presentation and panel at the Summit focused on the opportunities afforded to service providers by this unbridled appetite for mobility, especially from a business-to-business perspective. In particular, I discussed the intersection between cloud and the bring-your-own-device (BYOD) movement. This evolution, I believe, will be a critical catalyst, ensuring the continuation of mobility-driven productivity and economic growth.
The fact is, service-provider-delivered business-to-business cloud services have not Read More »
Tags: byod, Canadian Telecom Summit, Cisco, cloud, data, IBSG, mobility, network, service providers, SPs, telecom, telecommunications, video