Virtualization Nation, <\/p>\n
Last week, I blogged about the importance of HA for unplanned host downtime. By the number of responses, this is clearly a hot topic. Today, I was going to discuss planned downtime, specifically, the differences between Quick Migration and Live Migration; however, after sifting through all that feedback last week I realized that we need to dispel some myths first… <\/p>\n
After my last blog I received almost two dozen email telling me that VMotion was far superior for unplanned host downtime and that it was a much better HA solution because it could live migrate virtual machines. I\u00e2\u20ac\u2122ve heard this fallacy espoused for many years and, folks, this simply isn\u00e2\u20ac\u2122t the case. <\/p>\n
In the case of unplanned downtime, VMotion can\u00e2\u20ac\u2122t live migrate because there is no warning. Instead you must have VMware HA configured and the best it can do is restart<\/b> the affected virtual machines on other nodes which is the same as what is provided with Windows Server 2008 Hyper-V and Failover Clustering. <\/p>\n