Comments for Virtualization Eh

Comment on Checking vSphere Monitor Modes and Performance Implications by Paul

Paul — Wed, 30 Nov 2011 16:43:00 +0000

Good article very informative thanks

Comment on CPU Contention %RDY with CPU Limits %MLMTD by virtualizationeh

virtualizationeh — Fri, 02 Sep 2011 23:16:39 +0000

Hi Chris,

Sorry for the delay – big VMworld event…

You should be able to hot add virtual disks using the LSI SAS controller. The recognition of the disks is a property of the OS and nothing to do with the virtualization layer.

Give it a try.

Comment on PVSCSI, LSI SAS or Parallel – What vSCSI adapter should I choose? by Richard Bance

Richard Bance — Sat, 27 Aug 2011 07:08:42 +0000

I know this is a late reply, but hwat about if you need to hot add disks for replication. I think the SAS controller will not work, but the parallel one will….is this correct?

Comment on PVSCSI, LSI SAS or Parallel – What vSCSI adapter should I choose? by Выбор SCSI контроллера в VMware vSphere - chmv | chmv

Выбор SCSI контроллера в VMware vSphere - chmv | chmv — Fri, 08 Jul 2011 20:38:28 +0000

[...] VMware Paravirtual (PVSCSI) невозможно, выбирайте LSI Logic SAS ради совместимости с будущими [...]

Comment on CPU Contention %RDY with CPU Limits %MLMTD by Chris

Chris — Thu, 19 May 2011 17:01:12 +0000

So the values within RESXTOP of 0.10 are 0.1% or 10%?

Comment on CPU Contention %RDY with CPU Limits %MLMTD by virtualizationeh

virtualizationeh — Thu, 19 May 2011 15:46:55 +0000

Hi Chris,

I set the investigative threshold at 10% Ready per vCPU.

So a single vCPU VM can accumulate 10% RDY in esxtop or a two vCPU VM can accumulate 20% RDY, etc. Above that threshold one should better understand why its occurring.

Cheers, Mark

Comment on CPU Contention %RDY with CPU Limits %MLMTD by Chris

Chris — Wed, 18 May 2011 21:16:01 +0000

Mark,

Specific question on the RDY% value. I am trying to figure out what average value for RDY% would indicate a problem with CPU contention. We load our ESXi hosts fairly heavily and I want to make sure these machines have enough resources.

Comment on esxtop/resxtop NFS Datastore Counters – Now Available by virtualizationeh

virtualizationeh — Mon, 29 Nov 2010 16:44:12 +0000

Hey TMac,

The NAA is an IEEE disk device identifier used within vSphere 4.x.

More info here:
Identifying disks when working with VMware ESX

Decoding them is slightly harder but the first section following naa. contains the format and vendor code.

Hope that helps, let me know.

Comment on esxtop/resxtop NFS Datastore Counters – Now Available by TMac

TMac — Fri, 26 Nov 2010 15:37:56 +0000

Hey Mark,

I’ve been checking out the new NFS counters in esxtop. Can you tell me what the naa.xxxxxxxx device is?

TMac

Comment on PVSCSI, LSI SAS or Parallel – What vSCSI adapter should I choose? by michael

michael — Sun, 10 Oct 2010 19:02:22 +0000

Thanks again for investigating the subject.