On Fri, Jan 6, 2012 at 11:00, Florian Haas <[email protected]> wrote:
> Pacemaker integration has an added benefit: since Pacemaker is aware
> of the services in a cluster, we can always tell the cluster, i want
> this many mon instances, or this many OSDs, and Pacemaker can ensure
> exactly that. Pacemaker is also unique among cluster managers that it

We already talked on IRC, but just to clarify this to all:

How many OSDs to run (on what hosts) is a question about the available
& correctly-functioning storage devices, not really about the
administrators wishes. If you want to run more, plug in more hard
drives; starting OSDs without them having a backing store is not
helpful.

The planned architecture handles this automatically, triggering based
on the udev "new block device detected" hook. And that's one of the
reasons /etc/init.d/ceph-osd just isn't good enough for the brave new
world.
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