[OpenIndiana-discuss] Should I upgrade the pool?

[alka]

OpenIndiana 151.a5 supports feature flags.
You can use them after upgrading the pool to ZFS v5000

(you cannot downgrade from 5000 to lower numbers so 
this is currently OI 151a5 only (You can expect these features in all
systems derived from Illumos  like Linux, Nexenta or FreeBSD etc)

more
blog.delphix.com/csiden/files/2012/01/ZFS_Feature_Flags.pdf


Am 17.08.2012 um 20:53 schrieb Robert Soubie:

> Bonjour,
> 
> I just rebuilt my home ZFS server using openindiana (formerly Solaris Xpress 11) and napp-it, an configured it for Windows or Android clients.  The boot pool (rpool) was built by OI's installer; the storage pool (tank, 9GB) was created by napp-it's "create pool" function, using the ashift=12 parameter (6 x WDEARS 1.5Tb disks in RAIDZ2 configuration).
> So far, everything works, as a couple of thorough tests have shown, and I have restored the whole server from a backup machine I built. Napp-it "dd" benchmarks reports nice figures, 125.02 MB/s Write and 323.88 MB/s Read.
> 
> However, I have noticed that the pool status report (below) contains a suggestion to upgrade the pool, which is currently v28, which surprises me. Before proceeding, I would like to obtain informed opinions on the matter, including risks on the whole setup, if any.
> 
> Many thanks for any help,
> Robert.
> 
> Below is the information obtained from napp-it:
> 
> My pools:
> 
> Root Pool (ashift = 9):
> rpool    5000      16454639525011445801       vdevs: 1
> vdev 1: mirror      9      500.07 GB
> 
> Storage pool (ashift = 12, obtained through napp-it "Create Pool" command):
> tank    28      4308072134310677912       vdevs: 1
> vdev 1: raidz2      12      9.00 TB
> 
> zpool status (obtained from napp-it->jobs->scrub->pool status):
> 
>  pool: rpool
> state: ONLINE
>  scan: resilvered 6.47G in 0h4m with 0 errors on Wed Aug 15 23:59:44 2012
> config:
> 
>    NAME          STATE     READ WRITE CKSUM
>    rpool         ONLINE       0     0     0
>      mirror-0    ONLINE       0     0     0
>        c4t0d0s0  ONLINE       0     0     0
>        c4t1d0s0  ONLINE       0     0     0
> 
> errors: No known data errors
> 
>  pool: tank
> state: ONLINE
> status: The pool is formatted using an older on-disk format.  The pool can
>    still be used, but some features are unavailable.
> action: Upgrade the pool using 'zpool upgrade'.  Once this is done, the
>    pool will no longer be accessible on older software versions.
>  scan: none requested
> config:
> 
>    NAME        STATE     READ WRITE CKSUM
>    tank        ONLINE       0     0     0
>      raidz2-0  ONLINE       0     0     0
>        c5t0d0  ONLINE       0     0     0
>        c5t1d0  ONLINE       0     0     0
>        c5t2d0  ONLINE       0     0     0
>        c5t3d0  ONLINE       0     0     0
>        c5t4d0  ONLINE       0     0     0
>        c5t5d0  ONLINE       0     0     0
> 
> errors: No known data errors
> 
> 
> 
> 
> 
> -- 
> Éditions de l'Âge d'Or — Stanley G. Weinbaum
> http://www.lulu.com/robert_soubie
> http://www.smashwords.com/profile/view/StanleyGWeinbaum
> 
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