[zfs-discuss] Re: Production use ?

Christ Schlacta aarcane at aarcane.org
Fri May 25 12:41:51 EDT 2012


This is where lustre would come in handy, if someone intimately familiar
with it would add a ppa for it.
On May 25, 2012 7:59 AM, <josh at burstyns.com> wrote:

> All very true. I guess I've just been very cautious since I'm just
> starting my journey with ZFS and DRBD/Heartbeat.
>
> Perhaps I'll setup a test lab and test your advice over the weekend. :)
>
> > On 05/25/2012 03:36 PM, josh at burstyns.com wrote:
> >> We do not automate failover -- that wasn't our mandate with this
> >> project.
> >> (The project was designed to protect the data via DRBD at all costs.) We
> >> are aware that manual intervention will be required to "failover" the
> >> ZFS
> >> ZVOLs and the targets.
> >
> > Why manual? Surely you could automate this using RHCS (or heartbeat). I
> > fairly regularly deploy redundant MySQL servers that use a DRBD backed
> > FS for the databases/binlogs, and the failover works quite well
> > (obviously the client has to reconnect).
> >
> >> I spent some time trying to conceive of a way to automate a failover but
> >> in the end decided that it was better to have a person attend to a
> >> failure
> >> in lieu of trying to come up with every possible scenario. Again, this
> >> is
> >> mainly due to the non-integration of DRBD, ZFS and the iSCSI daemon.
> >
> > You could have it automated with a cascade of dependencies in RHCS. You
> > have the iscsi service dependant on zfs service, which is in turn
> > dependant on DRBD being primary.
> >
> > Gordan
> >
>
>
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