<html>
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix">Hi JF,<br>
</div>
<blockquote cite="mid:5507FE38.30507@uni.lu" type="cite">
<pre wrap="">
Hello Pierre,
I see your point and I understand your arguments. But as it happens, the
way you create your volumes has an impact on what you can do afterward,
and how you can expand them. *It has nothing to do with GlusterFS
itself, nor the developers or the community, it's all in your
architectural choices in the beginning.*</pre>
</blockquote>
Yes Theoretical you are right. Here at INRA, we are in a specific
unit with a constant growing. But the budget is dedicated annually.<br>
So I have build three clusters dedicated to different type of
computations and when the new plateform will need storage I have to
either build a new cluster or by a complete set of Four node or
seven node depending of my budget.<br>
Our unit is not in a data-center profile for the computation, the
evolution is a continue process.<br>
<br>
<br>
<blockquote cite="mid:5507FE38.30507@uni.lu" type="cite">
<pre wrap="">It would be the same problem with many other distributed FS, or even
some RAID setups. That is the kind of thing that you have to think about
in the very beginning, and that will have consequences later.</pre>
</blockquote>
Yes, that's the reason we have a scratch zone dedicated for the
computation and intermediate files, that is not secured all the user
know that it's like your DD in your PC. And other volume secured
with raid 5 and replica.<br>
I think that the choice ar good for three years, the time for us to
get the first DD problems. <br>
<br>
<blockquote cite="mid:5507FE38.30507@uni.lu" type="cite">
<pre wrap="">
As for your 14-node cluster, if it's again a distributed+striped volume,
then it's a 2 × 7 volume (distributed over 2 brick groups, each being a
7-disk stripe). To extend it, you will have to add 7 more bricks to
create a new striped brick group, and your volume will be transformed
into a 3 × 7 one.
</pre>
</blockquote>
OK that's better.<br>
<blockquote cite="mid:5507FE38.30507@uni.lu" type="cite">
<pre wrap="">I would advise you to read carefully the master documentation pertaining
to volume creation and architecture. Maybe it will help you understand
better the way things work and the impacts of your choices:
<a class="moz-txt-link-freetext" href="https://github.com/gluster/glusterfs/blob/master/doc/admin-guide/en-US/markdown/admin_setting_volumes.md">https://github.com/gluster/glusterfs/blob/master/doc/admin-guide/en-US/markdown/admin_setting_volumes.md</a>
</pre>
</blockquote>
I will.<br>
<br>
Many thanks for you and All.<br>
<br>
Sincerely.<br>
<br>
<div class="moz-signature">-- <br>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Signature electronique</title>
<!-- tableau général -->
<table border="0" cellpadding="0" cellspacing="0" width="auto">
<tbody>
<tr>
<td><a href="http://www.inra.fr"><img
src="cid:part1.02030900.09000809@jouy.inra.fr"
alt="INRA" longdesc="http://www.inra.fr" border="0"
height="60" width="147"></a></td>
</tr>
<tr>
<td style="padding-left:77px">
<!-- tableau identité -->
<table style="border-top:#999 solid 1px;
border-bottom:#999 solid 1px;" border="0"
cellpadding="0" cellspacing="0" width="auto">
<tbody>
<tr>
<td height="10"> </td>
</tr>
<tr>
<td align="left" valign="top"><font color="#8bac21"
face="Arial, Helvetica, sans-serif" size="2"><strong>Pierre
Léonard</strong></font></td>
</tr>
<tr>
<td align="left" valign="top"><font color="#000000"
face="Arial, Helvetica, sans-serif" size="1"><strong>Senior
IT Manager</strong></font></td>
</tr>
<tr>
<td align="left" valign="top"><font color="#8bac21"
face="Arial, Helvetica, sans-serif" size="1"><strong>MetaGenoPolis</strong></font></td>
</tr>
<tr>
</tr>
<tr>
<td align="left" height="30" valign="middle"><font
color="#8bac21" face="Arial, Helvetica,
sans-serif" size="2"><a
href="mailto:Pierre.Leonard@jouy.inra.fr"
style="color:#8bac21; text-decoration:none;">Pierre.Leonard@jouy.inra.fr</a></font></td>
</tr>
<tr>
<td align="left" valign="top"><font color="#000000"
face="Arial, Helvetica, sans-serif" size="1">Tél.
: +33 (0)1 34 65 29 78</font></td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td style="padding-left:77px;">
<!-- tableau adresse -->
<table border="0" cellpadding="0" cellspacing="0"
width="auto">
<tbody>
<tr>
<td align="left" height="20" valign="bottom"><font
color="#000000" face="Arial, Helvetica,
sans-serif" size="1">Centre de recherche INRA </font></td>
</tr>
<tr>
<td align="left" valign="bottom"><font
color="#000000" face="Arial, Helvetica,
sans-serif" size="1">Domaine de Vilvert Bât.
325 R+1</font></td>
</tr>
<tr>
<td align="left" valign="bottom"><font
color="#000000" face="Arial, Helvetica,
sans-serif" size="1">78 352 Jouy-en-Josas CEDEX</font></td>
</tr>
<tr>
<td align="left" valign="bottom"><font
color="#000000" face="Arial, Helvetica,
sans-serif" size="1">France</font></td>
</tr>
<tr>
<td align="left" valign="bottom"><font
color="#8bac21" face="Arial, Helvetica,
sans-serif" size="1"><a
href="http://www.mgps.eu"
style="color:#8bac21; text-decoration:none;">www.mgps.eu</a></font></td>
</tr>
<!-- <tr>
<td align="left" valign="bottom"><font face="Arial, Helvetica, sans-serif" size="1" color="#8bac21"><a href="https://intranet.inra.fr/mica/" style="color:#8bac21; text-decoration:none;"> https://intranet.inra.fr/mica/</a></font></td>
</tr>
-->
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>