[OmniOS-discuss] ZFS pool allocation remains after removing all files

[Rune Tipsmark]

On OmniOS v11 r151010



-----Original Message-----
From: Dan McDonald [mailto:danmcd at omniti.com] 
Sent: Thursday, October 09, 2014 11:11 AM
To: Rune Tipsmark
Cc: Richard Elling; Filip Marvan; omnios-discuss at lists.omniti.com
Subject: Re: [OmniOS-discuss] ZFS pool allocation remains after removing all files


On Oct 9, 2014, at 1:51 PM, Rune Tipsmark <rt at steait.net> wrote:

> I am happy to test in our environment, we have some semi-live demo servers (10+ virtual servers) that are being used as in a real production environment with load on them etc.
> 
> If some VAAI works, should I be able to see it in VMware?

As "hardware assisted erase", I believe.

> Does it make any difference I use SRP to connect the LU's?

My VMware is weak.

> My VAAI status for each LUN is as follows:
> 
> naa.600144f0908abf5d00005391079d0008
>   VAAI Plugin Name:
>   ATS Status: unsupported

Corresponds to ATS, which is in Nexenta only for now.

>   Clone Status: unsupported

Corresponds to XCOPY, which is in Nexenta only for now.

>   Zero Status: supported

Corresponds to WRITE_SAME, which is in all illumos distros.

>   Delete Status: unsupported

Corresponds to UNMAP, which is in all illumos distros.

I'm surprised "delete status" isn't marked as supported, but I do seem to recall a recent push disabled UNMAP (delete status) by default.  Let me look...

... Yeah... there's a global "zvol_unmap_enabled" now.  It *should* be true by default, though.  Which OmniOS revision are you on?

Dan