15 décembre 2009

Boot from Paravirtualized SCSI Adapter

From vSphere U1, VMware now support booting from a Paravirtualized SCSI adapter, why would you want to do this?  Well why not, check out the VMware Performance Blog where VMware have tested this adapter and shared their results. VMware were able to achieve 350,000 I/O operations per second on a single vSphere host (ESX 4.0) and 3 virtual machines.  From their findings the VMware Paravirtual SCSI (PVSCSI) adapter was able to achieve 12% more throughput with 18% less CPU cost compared to the LSI virtual adapter… Now you see... [Lire la suite]
Posté par jcdemarque à 06:37 - - Permalien [#]
Tags : , , , , , ,

29 octobre 2009

How-to enable PvSCSI and when

VMware Paravirtualized SCSI (PVSCSI driver) Introduced with vSphere 4 this driver can speed up and offload CPU.  VMware Paravirtual SCSI (PVSCSI) adapter is able to achieve 12% more throughput with 18% less CPU cost compared to the LSI virtual adapter.vSphere ships with this new high performance virtual storage adapter. Bus logic and LSI logic were the only choices so far. PVSCSI is best suited to run highly I/O intensive applications in the guest more efficiently (reduced CPU cycles)Before you activate and configure take... [Lire la suite]
Posté par jcdemarque à 11:00 - - Permalien [#]
Tags : , , , , , ,
20 mai 2009

vSphere performance

The last couple of weeks I’ve seen all these performance numbers(most not publicly available though)  of vSphere, one even more impressing than the other. I think every one will agree that the latest one is really impressive, 364.00 IOPS is just insane. There’s no load vSphere can’t handle, when correctly sized of course. But something that even made a bigger impression on me, as a consolidation fanatic, is the following line from the latest performance study:VMware’s new paravirtualized SCSI adapter (pvSCSI) offered 12%... [Lire la suite]
Posté par jcdemarque à 12:02 - - Permalien [#]
Tags : , , , ,