After additional digging and investigation, looks like it's showing me the
"compressed" size, which is good. I've regroomed the storage pools and
started moving things back, and I'm seeing files deflate back to their
expected size. What really tipped me off was when I decided to log in to
one of the VM's. VMware showed 120GB provisioned, 92GB allocated on the
standard block storage. After storage vmotioning back to NFS, it showed
62GB allocated. The key was when I logged in to the machine, Windows said
it was using 90GB. All said and done, it was a good adventure, and I got
the info that I needed. Thanks to all that took the time to reply.
From: Donal Farrell [mailto:vmlinuz...@gmail.com]
Sent: Wednesday, November 23, 2011 10:42 AM
To: Matt Breitbach
Subject: Re: [zfs-discuss] Compression
is this on esx 3.5.x? or 4.x or greater?
The reason i ask is that svmotion to and from nfs datastores did not
work correctly in esx 3.5.x
Also can you past the output of cat /vmfs/volumes/datastore/vmname.vmdk
On Wed, Nov 23, 2011 at 1:55 PM, Matt Breitbach
> Currently using NFS to access the datastore.
> -----Original Message-----
> From: Richard Elling [mailto:richard.ell...@gmail.com]
> Sent: Tuesday, November 22, 2011 11:10 PM
> To: Matt Breitbach
> Cc: firstname.lastname@example.org
> Subject: Re: [zfs-discuss] Compression
> Hi Matt,
> On Nov 22, 2011, at 7:39 PM, Matt Breitbach wrote:
>> So I'm looking at files on my ZFS volume that are compressed, and I'm
>> wondering to myself, "self, are the values shown here the size on disk,
>> are they the pre-compressed values". Google gives me no great results on
>> the first few pages, so I headed here.
>> This really relates to my VMware environment. I had some "things" happen
>> my platform that required me to Storage Vmotion everything off of a
>> particular zpool. When I did that, I saw most VM's inflate to nearly
>> thick provisioned size. What didn't swell to that size went to about 2/3
>> provisioned (non-Nexenta storage).
>> I have been seeing 1.3-1.5x compression ratios on pretty much everything
>> turn compression on for (these are general use VM's -
>> My question is this - when I'm looking in the file structure, or in the
>> datastore browser in VMware, am I seeing the uncompressed file size, or
>> compressed filesize?
>> My gut tells me that since they inflated _so_ badly when I storage
>> them, that they are the compressed values, but I would love to know for
> How are you measuring the space?
> Are you using block (iscsi/fc) or NFS to access the datastores from ESXi?
> -- richard
> ZFS and performance consulting
> LISA '11, Boston, MA, December 4-9
> zfs-discuss mailing list
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