What is static overhead memory?

By Duncan Epping, on May 6th, 2013%

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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Comments are closed   4.1, 5.0, 5.1, cloud, drs, memory, Miscellaneous, Server, VMware, vSphere

Increase Storage IO Control logging level

By Duncan Epping, on May 2nd, 2013%

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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Comments are closed   4.1, 5.0, 5.1, Miscellaneous, sioc, Storage, storage io control

Death to false myths: Admission Control lowers consolidation ratio

By Duncan Epping, on December 11th, 2012%

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 →

“Death to false myths: Admission Control lowers consolidation ratio” originally appeared on Yellow-Bricks.com. Follow us on Twitter and Facebook.
Available now: vSphere 5.1 Clustering Deepdive. (paper | e-book)

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Comments are closed   4.1, 5.0, 5.1, admission control, BC-DR, ha, high availability, Miscellaneous, myth, Server, vSphere

Insufficient resources to satisfy HA failover level on cluster

By Duncan Epping, on December 4th, 2012%

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 →

“Insufficient resources to satisfy HA failover level on cluster” originally appeared on Yellow-Bricks.com. Follow us on Twitter and Facebook.
Available now: vSphere 5.1 Clustering Deepdive. (paper | e-book)

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Comments are closed   4.1, 5.0, 5.1, BC-DR, ha, Miscellaneous, Server, VMware, vSphere

vCenter Extension error when deploying vSphere Replication?

By Duncan Epping, on November 26th, 2012%

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 →

“vCenter Extension error when deploying vSphere Replication?” originally appeared on Yellow-Bricks.com. Follow us on Twitter and Facebook.
Available now: vSphere 5.1 Clustering Deepdive. (paper | e-book)

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Comments are closed   4.1, 5.0, 5.1, Miscellaneous, Server, Various, vcenter

How do I configure an HA vpxd.das advanced setting?

By Duncan Epping, on November 7th, 2012%

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 →

“How do I configure an HA vpxd.das advanced setting?” originally appeared on Yellow-Bricks.com. Follow us on Twitter and Facebook.
Available now: vSphere 5.1 Clustering Deepdive. (paper | e-book)

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Comments are closed   4.1, 5.0, 5.1, BC-DR, ha, Miscellaneous, Server, vSphere

HA Admission Control does not disallow HA initiated restarts

By Duncan Epping, on March 6th, 2012%

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 [...]

“HA Admission Control does not disallow HA initiated restarts” originally appeared on Yellow-Bricks.com. Follow us on Twitter and Facebook.
Available now: vSphere 5 Clustering Deepdive. (paper | e-book)

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Comments are closed   4.1, 5.0, BC-DR, ha, Server, vSphere

I selected “failover host” and my VMs still end up on a different host after an HA event

By Duncan Epping, on March 2nd, 2012%

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 [...]

“I selected “failover host” and my VMs still end up on a different host after an HA event” originally appeared on Yellow-Bricks.com. Follow us on Twitter and Facebook.
Available now: vSphere 5 Clustering Deepdive. (paper | e-book)

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Comments are closed   4.1, 5.0, admission control, BC-DR, ha, Server, vSphere