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<div class="moz-cite-prefix">On 08/08/2016 02:37 PM, David Gossage
wrote:<br>
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<div>On Mon, Aug 8, 2016 at 4:23 PM, Joe Julian <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:joe@julianfamily.org" target="_blank">joe@julianfamily.org</a>></span>
wrote:<br>
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<div>On 08/08/2016 01:39 PM, David Gossage wrote:<br>
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<div dir="ltr">So now that I have my cluster on 3.7.14
and sharded and working I am of course looking for
what to break next.
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<div>Currently each of 3 nodes is on a 6 disk (WD
Red 1TB) raidz6 (zil on mirrored ssd), which I am
thinking is more protection than I may need with a
3 way replica. I was going to one by one change
them to basically raid10 letting it heal in
between.</div>
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<div>Is best way to do that a systemctl stop
glusterd, should I just kill the brick process to
simulate a brick dying, or is their an actual
brick maintenance command? <br>
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Just kill (-15) the brick process. That'll close the TCP
connections and the clients will just go right on
functioning off the remaining replica. When you format
and recreate your filesystem, it'll be missing the
volume-id extended attributes so to start it you'll need
to force it:<br>
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gluster volume start $volname start force<br>
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<div>If I left volume started when brick process is killed
and clients are still (in theory) connected to volume
wouldn't that just give me an error that volume is already
started?</div>
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No, it will just force-start the missing brick.<br>
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<div>Likely I would shut down the volume and do downtime for
this anyway though letting heals go on with VM's off.</div>
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<div>If /etc/glusterfs is unchanged and
/var/lib/glusterd is unchanged will doing a heal
full after reboot or restarting glusterd take care
of everything if I recreate the expected brick
path first?</div>
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Once started, perform a full heal to re-replicate.<br>
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<div>Are the improvements in 3.8 for sharding
significant enough I should first look at updating
to 3.8.2 when released in few days?</div>
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Yes.<br>
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<div dir="ltr"><span><font color="#888888"><span
style="color:rgb(0,0,0)"><b><i>David
Gossage</i></b></span><font><i><span
style="color:rgb(51,51,51)"><b><br>
</b></span></i></font></font></span>
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