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<p class="MsoNormal"><span lang="EN-US">Hi all, question…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is it useful to create gluster volume on machines with one hard disc?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">for example I have this: 1 physical machine with 7 nodes. Only 1 SSD per node.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Now I have shared storage on the master node that is shared across all other nodes using NFS.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is it handy to create distributed gluster volume across all nodes? Keeping in mind there is only 1 SSD per node...<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I was thinking about creating something like this:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Volume Name: sharedvolume<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Type: Distribute<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Number of Bricks: 8<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Transport-type: tcp<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Bricks:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Brick1: node0:/data/brick/shared<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Brick2: node1:/data/brick/shared<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Brick3: node2:/data/brick/shared<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Brick4: node3:/data/brick/shared<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Brick5: node4:/data/brick/shared<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Brick6: node5:/data/brick/shared<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Brick7: node6:/data/brick/shared<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US">Brick8: node7:/data/brick/shared<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:35.4pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">And then share it on each node as:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">nodeX:/sharedvolume /storage/shared glusterfs defaults,_netdev 0 0<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US">A little more information on the set-up:<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US">MASTER NODE (1x):<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">/dev/sda: 480.1 GB<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> /dev/mapper/centos_node0-root: 445.8 GB<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> /dev/mapper/centos_node0-swap: 33.8 GB<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">WORKER NODE (6x):<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">/dev/sda: 240.1 GB<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> /dev/mapper/centos_nodeX-root: 215.5 GB<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> /dev/mapper/centos_nodeX-swap: 24.0 GB<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The root / needs a lot of space for /tmp. But the /storage/shared is also on the root /.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">It sounds dangerous to create another logical volume for the shared storage. If the /tmp is full and the /storage/shared is not using a lot of space then this extra LV is not handy.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:8.0pt;color:#777777;mso-fareast-language:NL-BE">David Comeyne</span></b><span lang="EN-GB" style="mso-fareast-language:NL-BE"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:8.0pt;color:#777777;mso-fareast-language:NL-BE">System Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:NL-BE"><o:p> </o:p></span></p>
<p class="MsoNormal"><a href="http://www.applied-maths.com/default.htm"><span style="font-size:8.0pt;color:blue;mso-fareast-language:NL-BE;text-decoration:none"><img border="0" width="128" height="36" id="_x0000_i1025" src="http://www.applied-maths.com/pct/logo.gif" alt="http://www.applied-maths.com/pct/logo.gif"></span></a><span lang="EN-GB" style="mso-fareast-language:NL-BE"><o:p></o:p></span></p>
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