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Myth of VM mobility and follow-the-sun data centers
This article is part of the Network Evolution issue of December 2011 Vol. 2, No. 6
After I made a particularly snarky comment about an article that touted inter-data center VM mobility as the ultimate tool to reach the 100% availability heavens (this is why that argument is totally invalid), someone asked me why I don’t believe in workload mobility, disaster avoidance and follow-the-sun data centers. I am positive that some businesses have the need for all three of the above-mentioned functionalities, but I also know that live VM migration isn't the right tool for any of them. Read Ivan's IOS Hints Blog Ivan lays out the basics of Juniper's Qfabric data center network technology: QFabric hardware architecture QFabric control plane overview QFabric forwarding Let’s focus on the most bizarre of the three ideas: using VM mobility to implement follow-the-sun data centers. The underlying business requirements are sound and simple – moving the servers closer to end users reduces latency and long-distance bandwidth requirements. Reduced latency also improves response times and throughput. However, you cannot reach ...
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Features in this issue
Trying to decide cellular vs. Wi-Fi for mobile devices? An enterprise wireless connection policy will help steer mobile devices to the right network.
News in this issue
Hotspot 2.0 and the IEEE 802.11u protocol could allow mobile device users to securely roam between Wi-Fi and cellular networks without stopping to authenticate.
Implementing FCoE network convergence is possible considering the move to 10 GbE and the emergence of data center bridging.
FCoE at the edge can be a step toward network convergence, but end-to-end FCoE needs a whole lot more engineering before it can be reliable.
Think VM mobility and follow-the-sun data centers work for high availability and disaster avoidance? Think again. Long-distance migration is still a problem.