RAIDZ capacity (was ZFS version 15 committed to head)

[Stefan Bethke]

Am 17.07.2010 um 16:30 schrieb Marco van Lienen:

> I also posted the example of creating a test raidz pool based on 3 65Mb files.
> On osol there is more available space being reported by 'zfs list' on that test raidz pool
> When I created a similar test raidz pool also based on 3 65Mb files, 'zfs list' on my FreeBSD boxes (9.0-CURRENT amd64 and 8.0-RELEASE-p2 i386) is showing much less available space.
> So regardless whether we use whole disks or simply files for testing purposes, 'zfs list' on the osol system is reporting more available space.

I suggest to read up on ZFS a bit more.

With OpenSolaris 09.06, with three 20 GB virtual disks, I'm getting this:

root at opensolaris:~# zpool create tank raidz c8t1d0 c8t2d0 c8t3d0
root at opensolaris:~# zpool list
NAME   SIZE   USED  AVAIL    CAP  HEALTH  ALTROOT
tank  59.5G   881K  59.5G     0%  ONLINE  -
root at opensolaris:~# zfs list
NAME   USED  AVAIL  REFER  MOUNTPOINT
tank  91.2K  39.0G  25.3K  /tank

Which is exactly the same behavior as with FreeBSD.  And of course you only get to store 40 GB worth of files on this filesystem.


Stefan

-- 
Stefan Bethke <stb at lassitu.de>   Fon +49 151 14070811