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Allocation limit on TPVV

jruffer
Trusted Contributor

Allocation limit on TPVV

Is it possible to put an allocation limit on a Thinly Provisioned Virtual Volume?

In settings I can see Allocation Limit <Disabled> but can't see a way to enable and set a limit.

Jeremy

11 REPLIES
Mark Smithers
Regular Advisor

Re: Allocation limit on TPVV

Jeremy,

I never seen the "enabled" box greyed out and I can't find anything at all to control it.  Have you spoken to HP about this?  Would be interesting to know why it's greyed out.

As an alternative, try using SSMC version 2.2 to see if that works.  Don;t go for 2.3 as there are issues with Virtual Volumes in that version.

Cheers

Mark

 

Sheldon Smith
Honored Contributor

Re: Allocation limit on TPVV

While it is possible to set an allocation limit, it is not recommended as a Best Practice. Instead use Allocation Warning. Personally, I have yet to see a good Use Case for allocation limits.


Note: While I work for Hewlett Packard Enterprise, all of my comments (whether noted or not), are my own and are not any official representation of the company.
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jruffer
Trusted Contributor

Re: Allocation limit on TPVV

Hi Mike,

It's not greyed out, it isn't there.

What is SSMC?

Jeremy

jruffer
Trusted Contributor

Re: Allocation limit on TPVV

Hi Sheldon,

The event that prompted the question was that a bad query on a database used 1.5 TB more than the VV would normally use. This caused other systems to run out of space.  This is still causing us problems nearly 3 weeks later.

If we could set it so that they got No space on device earlier then we would not have the problem.

Regards

Jeremy

jruffer
Trusted Contributor

Re: Allocation limit on TPVV

I found it after I ticked Show advanced options.

Jeremy

Sheldon Smith
Honored Contributor

Re: Allocation limit on TPVV

SSMC is the StoreServ Management Console software. It replaces the older (InForm) Management Console. SSMC runs as a Windows service / Linux daemon and it's accessed via browser.


Note: While I work for Hewlett Packard Enterprise, all of my comments (whether noted or not), are my own and are not any official representation of the company.
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If my post was useful, click on my KUDOS! thumb below!
Dennis Handly
Acclaimed Contributor

Re: Allocation limit on TPVV

>Is it possible to put an allocation limit on a TPVV?

 

By setting the max size smaller?

jruffer
Trusted Contributor

Re: Allocation limit on TPVV

Yes, I would like the system to give the "no space on device" error earlier.

The size of the TPVV was intended to allow for at least 3 years growth, we don't want it getting that big yet.

jruffer
Trusted Contributor

Re: Allocation limit on TPVV

There is a tick box for Allow stale snapshots.  What are the implications of unticking this?

Jeremy

Dennis Handly
Acclaimed Contributor

Re: Allocation limit on TPVV

>The size of the TPVV was intended to allow for at least 3 years growth, we don't want it getting that big yet.

 

You could always use growvv.  But CLI supports "-usr-aw %" or "-usr-al %" for createvv and setvv.

jruffer
Trusted Contributor

Re: Allocation limit on TPVV

What happens is that writes fail rather than getting a no space on device error.  A bit more recovery is involved.

A better solution would be not to use thin provisioning.

Jeremy