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, or > 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 on > 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 their > 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 I > turn compression on for (these are general use VM's - > webservers,SQL,firewall,etc). > > 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 the > compressed filesize? > > My gut tells me that since they inflated _so_ badly when I storage vmotioned > them, that they are the compressed values, but I would love to know for > sure. 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 http://www.RichardElling.com LISA '11, Boston, MA, December 4-9 _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
