Do we want a periodic script for a zfs scrub?

[Bernd Walter]

On Wed, Jun 09, 2010 at 04:26:27PM +0200, Alexander Leidinger wrote:
> Hi,
> 
> I noticed that we do not have an automatism to scrub a ZFS pool  
> periodically. Is there interest in something like this, or shall I  
> keep it local?

For me scrub'ing takes several days without having a special big
pool size and starting another scrub restarts everything.
You should at least check if another one is still running.
I think resilvering is also a collision case to check for.

> Here's the main part of the monthly periodic script I quickly created:
> ---snip---
> case "$monthly_scrub_zfs_enable" in
>     [Yy][Ee][Ss])
>         echo
>         echo 'Scrubbing of zfs pools:'
> 
>         if [ -z "${monthly_scrub_zfs_pools}" ]; then
>                 monthly_scrub_zfs_pools="$(zpool list -H -o name)"
>         fi
> 
>         for pool in ${monthly_scrub_zfs_pools}; do
>                 # successful only if there is at least one pool to scrub
>                 rc=0
> 
>                 echo "   starting scrubbing of pool '${pool}'"
>                 zpool scrub ${pool}
>                 echo "      consult 'zpool status ${pool}' for the result"
>                 echo "      or wait for the daily_status_zfs mail, if 
>                 enabled"
>         done
>         ;;
> ---snip---

-- 
B.Walter <bernd at bwct.de> http://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.