[OpenIndiana-discuss] Should I upgrade the pool?

[Mike La Spina]

Hi Robert,

You do not need to enable the feature flags at this point however you will in the future need to consider the following:
 
You have come to a fork in the road. You can chose one of two directions going forward.
 
1. Follow the illumos path which is open and has a community.
2. Follow the Horacle path and hold your position with the ability to move back to Solaris ZFS.

You are running a home ZFS server so the risk is very small at this point and it's really a question of what you trust. 
Do you believe that Horacle will bring something to their closed works which could be more appealing than our community based illumos path offers?

For example illumos can mount any version of ZFS with feature flags, Express/Solaris cannot.

Regards,
Mike   



-----Original Message-----
From: Robert Soubie [mailto:robert.soubie at free.fr] 
Sent: Friday, August 17, 2012 1:53 PM
To: Discussion list for OpenIndiana
Subject: [OpenIndiana-discuss] Should I upgrade the pool?

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





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