Comments on: PVSCSI and Low IO Workloads

By: More vSphere 4.1 Enhancements – Welcome Back PVSCSI Driver! « thelowercasew.com

Mon, 16 Aug 2010 13:08:07 +0000

[...] In a post on his vPivot blog, former VMware performance guru Scott Drummonds echoed the sentiments and stated that this issue would be resolved in a future release of vSphere. He noted that the PVSCSI driver was only slightly slower than the LSI driver in certain scenarios but acknowledged that it could result in slightly less performance with no efficiency gains. [...]

By: drummonds

drummonds — Fri, 23 Jul 2010 05:48:47 +0000

PVSCSI coalescing has been fixed in ESX 4.1. VMware has checked in the fix to the code branch that will produce ESX 4.0 U3. I am not the right person to comment on PVSCI support for SCSI3.

By: Erik Bjerregård

Erik Bjerregård — Wed, 21 Jul 2010 11:28:58 +0000

Hi, any updates on when PVSCSI will work optimal for low IOPS? Anu new status on scsi3 support fro PVSCSI?

By: VMware pvSCSI – When and when not to use it | virtual insanity

VMware pvSCSI – When and when not to use it | virtual insanity — Thu, 29 Apr 2010 11:31:10 +0000

[...] I didn’t really understand this and the knowledge base article is lacking any detail on the rational behind the statement. I reached out to VMware performance engineer Scott Drummonds to see if he had anything he could publish to help clarify the KB article. Scott was nice enough to research this and posted his findings here. [...]

By: RTFM Education » Blog Archive » vNews – Mar, 2010

RTFM Education » Blog Archive » vNews – Mar, 2010 — Thu, 04 Mar 2010 18:49:35 +0000

[...] Citrix release virtual appliances [...]

By: Future Imperfect » Blog Archive » PVSCSI or LSI Logic: that is the question

Fri, 26 Feb 2010 10:43:37 +0000

[...] can read about it at pivot point. Filed under: I.T, VMWare Comment [...]

By: Scott

Scott — Thu, 25 Feb 2010 18:12:02 +0000

Exactly! That is my point in the summary. If your environment matches the case where pvscsi is slightly worse, by definition you have an application where performance is not important.

By: FP

FP — Thu, 25 Feb 2010 14:02:29 +0000

If I am in a situation where pvscsi is “slightly worse” than the other bus types, it means that I am in an environment with only a small demand for storage performance, right? So why would I care about losing a handlful of ms for my disk access?

By: Scott

Scott — Tue, 23 Feb 2010 23:05:50 +0000

Quite the contrary: I recommend that you always use vmxnet. Use the most recent version available to you.

By: cw

cw — Tue, 23 Feb 2010 22:25:19 +0000

so you recommend to NOT use VMXNET3 at all?