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<div class="moz-cite-prefix">On 11/09/2016 10:21 AM, Lopez, Dan-Joe
wrote:<br>
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<p class="MsoNormal"><a moz-do-not-send="true"
name="_MailEndCompose"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">Thanks
Joe and Gandalf!<o:p></o:p></span></a></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">I’ve
look at the blog that you wrote Joe, but it seems to
reference a more complicated scenario than I am working
with.<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">We
have a` replica n` volume, and I want to make it a`
replica n+1` volume. Is that possible?<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></span></p>
<p class="MsoNormal" style="vertical-align:bottom"><span
style="mso-bookmark:_MailEndCompose"><span
style="font-family:"Arial",sans-serif;color:black">Dan-Joe
Lopez
</span></span><span style="mso-bookmark:_MailEndCompose"><o:p></o:p></span></p>
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<br>
Sure, that's easy, add-brick $myvol replica $new_n $new_brick<br>
<br>
but... why are you adding replica? Is it to improve redundancy and
availability, or is it so you "have the same files on all our
servers" (a common mistake)?<br>
<br>
Another page that might be of use to you:<br>
<a class="moz-txt-link-freetext" href="https://joejulian.name/blog/glusterfs-replication-dos-and-donts/">https://joejulian.name/blog/glusterfs-replication-dos-and-donts/</a><br>
<br>
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cite="mid:505416a2fdc0451ba2bca5d75d9ab987@USPHLE13US01.global.corp.sap"
type="cite">
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<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></span></p>
<span style="mso-bookmark:_MailEndCompose"></span>
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">
<a class="moz-txt-link-abbreviated" href="mailto:gluster-users-bounces@gluster.org">gluster-users-bounces@gluster.org</a>
[<a class="moz-txt-link-freetext" href="mailto:gluster-users-bounces@gluster.org">mailto:gluster-users-bounces@gluster.org</a>]
<b>On Behalf Of </b>Gandalf Corvotempesta<br>
<b>Sent:</b> Tuesday, November 8, 2016 10:54 PM<br>
<b>To:</b> Joe Julian <a class="moz-txt-link-rfc2396E" href="mailto:joe@julianfamily.org"><joe@julianfamily.org></a><br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:gluster-users@gluster.org">gluster-users@gluster.org</a><br>
<b>Subject:</b> Re: [Gluster-users] Automation of single
server addition to replica<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p>Il 09 nov 2016 1:23 AM, "Joe Julian" <<a
moz-do-not-send="true" href="mailto:joe@julianfamily.org">joe@julianfamily.org</a>>
ha scritto:<br>
><br>
> Replicas are defined in the order bricks are listed in
the volume create command. So gluster volume create myvol
replica 2 server1:/data/brick1 server2:/data/brick1
server3:/data/brick1 server4:/data/brick1 will replicate
between server1 and server2 and replicate between server3 and
server4.<br>
><br>
> See also <a moz-do-not-send="true"
href="https://joejulian.name/blog/how-to-expand-glusterfs-replicated-clusters-by-one-server/">https://joejulian.name/blog/how-to-expand-glusterfs-replicated-clusters-by-one-server/</a><br>
><o:p></o:p></p>
<p>i really hope this could be automated in newer gluster
versions<br>
There is almost no sense to make a replica on the same server
so gluster<br>
should automatically move bricks to preserve data consistency
when adding servers.<o:p></o:p></p>
<p>Ceph does this by moving objects around and you don't have to
add servers in a multiple of replica<o:p></o:p></p>
<p>the rebalance command could be used to rebalance newly added
bricks by preserving replicas in a proper state
<o:p></o:p></p>
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