<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Arial; font-size: 10pt; color: #000000'><div>Is it normal to expect very high server load and clients being unable to access the mounts during this process? It means the application running on this will need to be offline for hours.<br><br><hr id="zwchr"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From: </b>"Ravishankar N" <ravishankar@redhat.com><br><b>To: </b>"Alun James" <ajames@tibus.com><br><b>Cc: </b>gluster-users@gluster.org<br><b>Sent: </b>Wednesday, 8 January, 2014 2:37:05 PM<br><b>Subject: </b>Re: [Gluster-users] delete brick / format / add empty brick<br><br>
<div class="moz-cite-prefix">On 01/08/2014 05:57 PM, Alun James
wrote:<br>
</div>
<blockquote cite="mid:11dcc6d3-9af8-48f6-b9ce-3a3cd89a0b12@bossk">
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<div style="font-family: Arial; font-size: 10pt; color: #000000"><font size="2">I have this a go.</font>
<div style="font-size: 10pt;"><br>
</div>
<div style="font-size: 10pt;"><i style="font-size: small;">gluster
volume add-brick myvol replica 2 server2:/brick1 </i></div>
<div><i style="font-size: small;">gluster volume heal myvol full</i></div>
<div>
<div style="font-size: 10pt;"><br>
</div>
<div style="font-size: 10pt;">It seems to be syncing the files
but very slowly. Also the server load on server01 has risen
to 200+ and the gluster clients are no longer able to access
the mounts. Is there a way to do this that is not as
impactful? Could I manually rsync the bricks before adding
the second node back in?</div>
<div style="font-size: 10pt;"><br>
</div>
</div>
</div>
</blockquote>
The recommended way to heal is using the command mentioned. The
gluster self heal daemon takes appropriate file locks before
healing. Since clients are accessing the volume, I don't think
bypassing that and rsyncing the bricks is a good idea. <br>
<br>
Regards,<br>
Ravi<br>
<br>
<br>
<blockquote cite="mid:11dcc6d3-9af8-48f6-b9ce-3a3cd89a0b12@bossk">
<div style="font-family: Arial; font-size: 10pt; color: #000000">
<div>
<div style="font-size: 10pt;"><br>
</div>
<div style="font-size: 10pt;">Alun.</div>
<div style="font-size: 10pt;"><br>
<hr id="zwchr">
<div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From:
</b>"Ravishankar N" <a class="moz-txt-link-rfc2396E" href="mailto:ravishankar@redhat.com" target="_blank"><ravishankar@redhat.com></a><br>
<b>To: </b>"Alun James" <a class="moz-txt-link-rfc2396E" href="mailto:ajames@tibus.com" target="_blank"><ajames@tibus.com></a><br>
<b>Cc: </b><a class="moz-txt-link-abbreviated" href="mailto:gluster-users@gluster.org" target="_blank">gluster-users@gluster.org</a><br>
<b>Sent: </b>Wednesday, 8 January, 2014 4:00:44 AM<br>
<b>Subject: </b>Re: [Gluster-users] delete brick / format
/ add empty brick<br>
<br>
<div class="moz-cite-prefix">On 01/07/2014 09:40 PM, Alun
James wrote:<br>
</div>
<blockquote cite="mid:2d85c83b-17cc-4c02-b73a-ab09266ed554@bossk">
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<div style="font-family: Arial; font-size: 10pt; color:
#000000"><font face="Arial" size="2">Hi folks,</font>
<div style="color: rgb(0, 0, 0); font-family: Arial;
font-size: 10pt;"><br>
</div>
<div><font face="Arial" size="2">I had a 2 node (1
brick each) replica, some network meltdown issues
seemed to cause problems with second node
(server02). glusterfsd process reaching 200-300%
and errors relating to split brain possibilities
and self heal errors.</font></div>
<div><font face="Arial" size="2"><br>
</font></div>
<div><font face="Arial" size="2">Original volume info:</font></div>
<div><font face="Arial" size="2"><br>
</font></div>
<div><font face="Arial" size="2"><i>Volume Name: myvol</i></font></div>
<div><font face="Arial" size="2">
<div><i>Type: Replicate</i></div>
<div><i>Status: Started</i></div>
<div><i>Number of Bricks: 2</i></div>
<div><i>Transport-type: tcp</i></div>
<div><i>Bricks:</i></div>
<div><i>Brick1: server01:/brick1</i></div>
<div><i>Brick2: server02:/brick1</i></div>
<div><br>
</div>
</font></div>
<div><span style="font-family: Arial; font-size:
small;">I removed the second brick (that was
showing server problems).</span></div>
<div><font face="Arial" size="2"><br>
</font></div>
<div><font face="Arial" size="2"><i>gluster volume
remove-brick myvol replica 1 server02:/brick1</i></font></div>
<div><font face="Arial" size="2"><i><br>
</i></font></div>
<div><font face="Arial" size="2">Now the volume status
is:</font></div>
<div><font face="Arial" size="2"><br>
</font></div>
<div><font face="Arial" size="2">
<div><i>Volume Name: tsfsvol0</i></div>
<div><i>Type: Distribute</i></div>
<div><i>Status: Started</i></div>
<div><i>Number of Bricks: 1</i></div>
<div><i>Transport-type: tcp</i></div>
<div><i>Bricks:</i></div>
<div><i>Brick1: server01:/brick1</i></div>
<div><i><br>
</i></div>
<div>All is fine and the data on working server is
sound.</div>
<div><br>
</div>
<div>The xfs partition for <i>server02:/brick1</i> has
been formatted and therefore the data gone. All
other gluster config data has remained
untouched. Can I re-add the second server to the
volume with an empty brick and the data will
auto replicate over from the working server?</div>
<div><br>
</div>
<div><i>gluster volume add-brick myvol replica 2
server2:/brick1 ??</i></div>
</font><font face="Arial" size="2">
<div><br>
</div>
</font></div>
</div>
</blockquote>
<br>
<font size="2"><font face="Arial">Yes this should work
fine. You will need to run a `gluster volume heal
myvol full` to manually trigger the replication.</font></font><br>
<br>
<blockquote cite="mid:2d85c83b-17cc-4c02-b73a-ab09266ed554@bossk">
<div style="font-family: Arial; font-size: 10pt; color:
#000000"><br>
<div style="color: rgb(0, 0, 0); font-family: Arial;
font-size: 10pt;"><br>
<br>
<div><span></span><font face="arial, helvetica,
sans-serif" size="2">ALUN JAMES<br>
<font>Senior Systems Engineer</font><br>
<font>Tibus</font><br>
<br>
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<font>E: <a class="moz-txt-link-abbreviated" href="mailto:ajames@tibus.com" target="_blank">ajames@tibus.com</a></font><br>
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