We had a discussion internally on static overhead memory. Coincidentally I spoke with Aashish Parikh from the DRS team on this topic a couple of weeks ago when I was in Palo Alto. Aashish is working on improving the overhead memory estimation calculation so that both HA and DRS can be even more efficient when … … Continue reading →
“What is static overhead memory?” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.
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I received this question today around how to increase the Storage IO Control logging level. I knew either Frank or I wrote about this in the past but I couldn’t find it… which made sense as it was actually documented in our book. I figured I would dump the blurp in to an article so … … Continue reading →
“Increase Storage IO Control logging level” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.
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Death to false myths probably sounds a bit euuhm well Dutch probably, or “direct” as others would label it. Lately I have seen some statements floating around which are either false or misused. One of them is around Admission Control Continue reading →
. . . → Read More: Death to false myths: Admission Control lowers consolidation ratio
I had this question yesterday where the error “Insufficient resources to satisfy HA failover level on cluster” comes from. And although it is hopefully clear to all of my regular readers this is caused by something that is called vSphere Continue reading →
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I’ve seen this popping up fairly often now and was under the impression I wrote about it a while back, but can’t find it. So here you go. If during the deployment of an OVF, in this case vSphere Replication, Continue reading →
. . . → Read More: vCenter Extension error when deploying vSphere Replication?
On the community forums someone asked a question around how to set “config.vpxd.das.electionWaitTimeSec”. I was looking at the documentation and it is indeed not really clear on what / where / how to set an HA vpxd.das advanced setting. This Continue reading →
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I had a question about HA Admission Control today and as this is something that has come up multiple times I figured I would dedicate an article to it. This customer had enabled HA Admission Control and artificially wanted to control the amount of virtual machines a single host could run by manually specifying the slot size. (For more details [...]
. . . → Read More: HA Admission Control does not disallow HA initiated restarts
I received a question today about HA admission control policies, and more specifically about the “failover host” admission control policy. The question was why VMs were restarted on a different host then selected with the “Failover Host” admission control policy. Shouldn’t this policy guarantee that a VM is restarted on the designated host? The answer is fairly straight forward, and [...]
. . . → Read More: I selected “failover host” and my VMs still end up on a different host after an HA event