mkaberle
2 Bronze

Do we recommend PV-SCSI for all workloads?

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For workloads like Application servers, or Apps that access flat file system based repositories?

I know we would recommend it for DB workloads, but customer was asking about using it for non-DB workloads.

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jeff_browning
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Re: Do we recommend PV-SCSI for all workloads?

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Matt:

pvscsi is free and from what I can tell, performance is never worse when you run it. I think of pvscsi as being like chicken soup when you have a cold: Can't hurt, might help.

Certainly for any IO intensive workload, pvscsi is a no-brainer.

Regards,

Jeff

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ichakrab
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Re: Do we recommend PV-SCSI for all workloads?

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Hi Matthew,

It would be great if you can elaborate on your question for greater clarity. I feel that flat file repository may be a single point of failure and there may be a bottleneck in performance in the long-run.

Thanks.

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jeff_browning
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Re: Do we recommend PV-SCSI for all workloads?

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Matt:

pvscsi is free and from what I can tell, performance is never worse when you run it. I think of pvscsi as being like chicken soup when you have a cold: Can't hurt, might help.

Certainly for any IO intensive workload, pvscsi is a no-brainer.

Regards,

Jeff

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sudhirbala
2 Bronze

Re: Do we recommend PV-SCSI for all workloads?

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I agree with Jeff.

We, VMware, absolutely recommend using PVSCSI for DB workloads. PVSCSI enhances performances and also facilitates more queues to the vmdk's , hence more channels to the luns.

mkaberle
2 Bronze

Re: Do we recommend PV-SCSI for all workloads?

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I am more worried about using pv SCSI for non DB workloads.

Any reason not to use it?

Sent from my iPhone, please excuse typo's

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sudhirbala
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Re: Do we recommend PV-SCSI for all workloads?

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Nope, PVSCSI is available if you need that extra boost, it does not hurt to use it., For example, I have customers who are using PVSCSI for RHEL OS vmdk's in their production env, RHEL out of the box provides pvscsi support, OS disks are not IO heavy but they like doing this just to ensure that they have reserve boost in case they need to use that SCSI controller for some other vmdk's which may take advantage of pvscsi capabilities....

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mkaberle
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Re: Do we recommend PV-SCSI for all workloads?

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Customer is looking for a Recommendation on using PVSCSI vs LSI Logic going forward for all VMs.

Thoughts?

Sent from my iPhone, please excuse typo's

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sudhirbala
2 Bronze

Re: Do we recommend PV-SCSI for all workloads?

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-For high IO workloads , DB/Non DB, PVSCSI controllers are recommended for hosting that application VMDK's.

-you can use LSI logic as the SCSI controller for that OS vmdk if you do not see a lot of IO's on the OS disk.

-HTH

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mkaberle
2 Bronze

Re: Do we recommend PV-SCSI for all workloads?

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It does help. Thanks...

Sent from my iPhone, please excuse typo's

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jeff_browning
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Re: Do we recommend PV-SCSI for all workloads?

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Like I said, might help, can't hurt. I would always load pvscsi, personally.

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