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<div class="moz-cite-prefix">On 03/23/2016 06:56 PM, Ralf Simon
wrote:<br>
</div>
<blockquote
cite="mid:OFB7993BC2.EAD6F7E4-ONC1257F7F.0048DD46-C1257F7F.0049DA1C@notes.denic.de"
type="cite"><font face="sans-serif" size="2">Hello,</font>
<br>
<br>
<font face="sans-serif" size="2">I've installed ....</font>
<br>
<br>
<font face="sans-serif" size="2"># yum info glusterfs-server</font>
<br>
<font face="sans-serif" size="2">Loaded plugins: fastestmirror</font>
<br>
<font face="sans-serif" size="2">Loading mirror speeds from cached
hostfile</font>
<br>
<font face="sans-serif" size="2">Installed Packages</font>
<br>
<font face="sans-serif" size="2">Name : glusterfs-server</font>
<br>
<font face="sans-serif" size="2">Arch : x86_64</font>
<br>
<font face="sans-serif" size="2">Version : 3.7.6</font></blockquote>
<font size="2"><br>
I think the patch <a class="moz-txt-link-freetext" href="http://review.gluster.org/#/c/12748/">http://review.gluster.org/#/c/12748/</a> to enhance
the volinfo output went in for 3.7.7. But I would advise you to
use 3.7.9 that was recently released because a couple of arbiter
related fixes have happened since 3.7.6<br>
Hope this helps,<br>
Ravi<br>
<br>
</font>
<blockquote
cite="mid:OFB7993BC2.EAD6F7E4-ONC1257F7F.0048DD46-C1257F7F.0049DA1C@notes.denic.de"
type="cite">
<br>
<font face="sans-serif" size="2">Release : 1.el7</font>
<br>
<font face="sans-serif" size="2">Size : 4.3
M</font>
<br>
<font face="sans-serif" size="2">Repo : installed</font>
<br>
<font face="sans-serif" size="2">From repo : latest</font>
<br>
<font face="sans-serif" size="2">Summary : Clustered
file-system
server</font>
<br>
<font face="sans-serif" size="2">URL : </font><a
moz-do-not-send="true"
href="http://www.gluster.org/docs/index.php/GlusterFS"><font
face="sans-serif" size="2" color="blue"><a class="moz-txt-link-freetext" href="http://www.gluster.org/docs/index.php/GlusterFS">http://www.gluster.org/docs/index.php/GlusterFS</a></font></a>
<br>
<font face="sans-serif" size="2">License : GPLv2 or LGPLv3+</font>
<br>
<font face="sans-serif" size="2">Description : GlusterFS is a
distributed
file-system capable of scaling to several</font>
<br>
<font face="sans-serif" size="2">
: petabytes. It aggregates various storage bricks over
Infiniband RDMA</font>
<br>
<font face="sans-serif" size="2">
: or TCP/IP interconnect into one large parallel network file</font>
<br>
<font face="sans-serif" size="2">
: system. GlusterFS is one of the most sophisticated file
systems in</font>
<br>
<font face="sans-serif" size="2">
: terms of features and extensibility. It borrows a powerful
concept</font>
<br>
<font face="sans-serif" size="2">
: called Translators from GNU Hurd kernel. Much of the code in
GlusterFS</font>
<br>
<font face="sans-serif" size="2">
: is in user space and easily manageable.</font>
<br>
<font face="sans-serif" size="2">
:</font>
<br>
<font face="sans-serif" size="2">
: This package provides the glusterfs server daemon.</font>
<br>
<br>
<font face="sans-serif" size="2">I wanted to build a ...</font>
<br>
<br>
<font face="sans-serif" size="2"># gluster volume create gv0
replica
3 arbiter 1 d90029:/data/brick0 d90031:/data/brick0
d90034:/data/brick0</font>
<br>
<font face="sans-serif" size="2">volume create: gv0: success:
please
start the volume to access data</font>
<br>
<br>
<font face="sans-serif" size="2">... but I got a ...</font>
<br>
<br>
<font face="sans-serif" size="2"># gluster volume info</font>
<br>
<br>
<font face="sans-serif" size="2">Volume Name: gv0</font>
<br>
<font face="sans-serif" size="2">Type: Replicate</font>
<br>
<font face="sans-serif" size="2">Volume ID:
329325fc-ceed-4dee-926f-038f44281678</font>
<br>
<font face="sans-serif" size="2">Status: Created</font>
<br>
<font face="sans-serif" size="2">Number of Bricks: </font><font
face="sans-serif" size="2" color="#ff4040"><b>1
x 3 = 3</b></font>
<br>
<font face="sans-serif" size="2">Transport-type: tcp</font>
<br>
<font face="sans-serif" size="2">Bricks:</font>
<br>
<font face="sans-serif" size="2">Brick1: d90029:/data/brick0</font>
<br>
<font face="sans-serif" size="2">Brick2: d90031:/data/brick0</font>
<br>
<font face="sans-serif" size="2">Brick3: d90034:/data/brick0</font>
<br>
<font face="sans-serif" size="2">Options Reconfigured:</font>
<br>
<font face="sans-serif" size="2">performance.readdir-ahead: on</font>
<br>
<br>
<font face="sans-serif" size="2">... without the requested arbiter
!</font>
<br>
<br>
<font face="sans-serif" size="2">The same situation with 6 bricks
...</font>
<br>
<br>
<font face="sans-serif" size="2"># gluster volume create gv0
replica
3 arbiter 1 d90029:/data/brick0 d90031:/data/brick0
d90034:/data/brick0
d90029:/data/brick1 d90031:/data/brick1 d90034:/data/brick1</font>
<br>
<font face="sans-serif" size="2">volume create: gv0: success:
please
start the volume to access data</font>
<br>
<font face="sans-serif" size="2">[root@d90029 ~]# gluster vol info</font>
<br>
<br>
<font face="sans-serif" size="2">Volume Name: gv0</font>
<br>
<font face="sans-serif" size="2">Type: Distributed-Replicate</font>
<br>
<font face="sans-serif" size="2">Volume ID:
2b8dbcc0-c4bb-41e3-a870-e164d8d10c49</font>
<br>
<font face="sans-serif" size="2">Status: Created</font>
<br>
<font face="sans-serif" size="2">Number of Bricks: </font><font
face="sans-serif" size="2" color="#ff4040"><b>2
x 3 = 6</b></font>
<br>
<font face="sans-serif" size="2">Transport-type: tcp</font>
<br>
<font face="sans-serif" size="2">Bricks:</font>
<br>
<font face="sans-serif" size="2">Brick1: d90029:/data/brick0</font>
<br>
<font face="sans-serif" size="2">Brick2: d90031:/data/brick0</font>
<br>
<font face="sans-serif" size="2">Brick3: d90034:/data/brick0</font>
<br>
<font face="sans-serif" size="2">Brick4: d90029:/data/brick1</font>
<br>
<font face="sans-serif" size="2">Brick5: d90031:/data/brick1</font>
<br>
<font face="sans-serif" size="2">Brick6: d90034:/data/brick1</font>
<br>
<font face="sans-serif" size="2">Options Reconfigured:</font>
<br>
<font face="sans-serif" size="2">performance.readdir-ahead: on</font>
<br>
<br>
<br>
<font face="sans-serif" size="2">In contrast the documentation
tells
....</font>
<br>
<br>
<br>
<font face="sans-serif" size="2"><b>Arbiter configuration</b></font>
<p><font face="sans-serif" size="2">The arbiter configuration
a.k.a. the
arbiter volume is the perfect sweet spot between a 2-way
replica and 3-way
replica to avoid files getting into split-brain, <b><i>without
the 3x storage
space</i></b> as mentioned earlier. The syntax for
creating the volume
is:</font>
</p>
<p><font face="sans-serif" size="2"><b>gluster volume create
replica 3 arbiter
1 host1:brick1 host2:brick2 host3:brick3</b></font>
</p>
<p><font face="sans-serif" size="2">For example:</font>
</p>
<p><font face="sans-serif" size="2"><b>gluster volume create
testvol replica
3 arbiter 1 127.0.0.2:/bricks/brick{1..6} force</b></font>
</p>
<p><font face="sans-serif" size="2">volume create: testvol:
success: please
start the volume to access data</font>
</p>
<p><font face="sans-serif" size="2"><b>gluster volume info</b></font>
</p>
<p><font face="sans-serif" size="2">Volume Name: testvol<br>
Type: Distributed-Replicate<br>
Volume ID: ae6c4162-38c2-4368-ae5d-6bad141a4119<br>
Status: Created<br>
Number of Bricks: </font><font face="sans-serif" size="2"
color="#ff4040"><b>2
x (2 + 1) = 6</b></font><font face="sans-serif" size="2"><br>
Transport-type: tcp<br>
Bricks:<br>
Brick1: 127.0.0.2:/bricks/brick1<br>
Brick2: 127.0.0.2:/bricks/brick2<br>
Brick3: 127.0.0.2:/bricks/brick3 </font><font
face="sans-serif" size="2" color="#ff4040"><b>(arbiter)</b></font><font
face="sans-serif" size="2"><br>
Brick4: 127.0.0.2:/bricks/brick4<br>
Brick5: 127.0.0.2:/bricks/brick5<br>
Brick6: 127.0.0.2:/bricks/brick6 </font><font
face="sans-serif" size="2" color="#ff4040"><b>(arbiter)</b></font><font
face="sans-serif" size="2"><br>
Options Reconfigured : transport.address-family: inet<br>
performance.readdir-ahead: on `</font>
<br>
<br>
<br>
<br>
<font face="sans-serif" size="2">What's going wrong ? Can
anybody help
?</font>
<br>
<br>
<font face="sans-serif" size="2">Kind Regards</font>
<br>
<font face="sans-serif" size="2">Ralf Simon</font>
<br>
<br>
<br>
<br>
</p>
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