03 janvier 2013

Isolation detection in vSphere 5.1 versus 5.0

I received a question today from someone who wanted to know the difference for isolation detection between vSphere 5.0 and 5.1. I described this in our book, but I figured I would share it here as well. Note that this is an outtake from the book. The isolation detection mechanism has changed substantially since previous versions of vSphere. The main difference is the fact that HA triggers a master election process before it will declare a host is isolated. In this timeline, “s” refers to seconds. The following timeline is the... [Lire la suite]
Posté par jcdemarque à 11:14 - - Commentaires [0] - Permalien [#]
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25 mai 2009

vSphere HA Isolation Response

As of VMware vCenter 2.5 Update 2 the HA default isolation response changed from “Power Off” to “Leave powered on”. A lot of people liked this new default setting because it would lower the chances of downtime due to a “false positive”. I’ve never been a fan though, I just don’t like using degraded hardware or a degraded ESX host for that matter. Those that did like the change should take notice of the fact that with vSphere comes a new default isolation response: Note that this change is only for new clusters, if you... [Lire la suite]
Posté par jcdemarque à 16:06 - - Commentaires [0] - Permalien [#]
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