<div dir="ltr">Thanks, <div><br></div><div>Those nodes do not need coordination between them. They have been working so far until now without HA and OCFS2. A load balancer distributes the requests between both nodes, they do not know about the existence of each other. </div><div><div><br></div><div>However, they do require shared storage to work with the same data. Before setting up the OCFS2 cluster, we have been syncing disks using rsync, but it syncs each minute, not real time.</div><div><br></div><div>So, our requirement would depend on OCFS2, and it works, but not of an HA and stonith setup I think. I see no way how it could add value to the required solution. Or it does?</div><div><br></div><div>Thanks.</div><div><div><br><div> </div></div></div></div><div class="gmail_extra"><br clear="all"><div><div><div dir="ltr"><div dir="ltr"><div><b style="font-family:verdana,sans-serif"><font color="#666666">Jonathan Vargas Rodríguez</font></b><br></div><font face="verdana, sans-serif"><font color="#666666">Founder and Solution Engineer</font></font><br></div><div><font face="verdana, sans-serif"><font color="#666666"><a href="https://alkaid.cr/" target="_blank">Alkaid</a> | Open Source Software</font></font></div><div><br></div><div dir="ltr"><div><font face="courier new, monospace"><font color="#ffffff"><b style="background-color:rgb(111,168,220)"> mail </b></font><b style="color:rgb(68,68,68)"> </b></font><font face="verdana, sans-serif" color="#666666"><a href="mailto:jonathan.vargas@alkaid.cr" target="_blank">jonathan.vargas@alkaid.cr</a></font></div><div><font face="courier new, monospace"><font color="#ffffff" style="font-weight:bold;background-color:rgb(147,196,125)"> telf </font><font style="color:rgb(68,68,68);font-weight:bold"> </font></font><font face="verdana, sans-serif" color="#666666"><a href="tel:%2B506%204001%206259%20Ext.%2001" value="+50640016259" target="_blank">+506 4001 6259 Ext. 01</a> </font></div><div><font face="courier new, monospace"><font color="#ffffff" style="font-weight:bold;background-color:rgb(246,178,107)"> mobi </font><font color="#444444" style="font-weight:bold"> </font><font color="#444444" style="font-weight:bold"> </font></font><span style="color:rgb(102,102,102);font-family:verdana,sans-serif;font-size:12.8000001907349px"><a href="tel:%2B506%204001%206259%20Ext.%2051" value="+50640016259" target="_blank">+506 4001 6259 Ext. 51</a> </span></div><div><br></div></div><div dir="ltr"><div style="font-size:12.8000001907349px"><div><a href="http://linkedin.com/in/jonathanvargas/" target="_blank"><img src="https://alkaid.cr/images/theme/icons/social/linkedin.png"></a> <a href="https://plus.google.com/+JonathanVargas/" target="_blank"><img src="https://alkaid.cr/images/theme/icons/social/googleplus.png"></a> <a href="https://www.facebook.com/alkaid.cr" target="_blank"><img src="https://alkaid.cr/images/theme/icons/social/facebook.png"></a> <a href="https://twitter.com/alkaidcr" target="_blank"><img src="https://alkaid.cr/images/theme/icons/social/twitter.png"></a> </div><div><br></div></div><div style="font-size:12.8000001907349px"><div></div></div></div></div></div></div>
<br><div class="gmail_quote">2015-06-09 21:39 GMT-06:00 Digimer <span dir="ltr"><<a href="mailto:lists@alteeve.ca" target="_blank">lists@alteeve.ca</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span>On 09/06/15 11:04 PM, Jonathan Vargas wrote:<br>
> After reading a bit and chatting at the #suse IRC channel, I'm starting<br>
> to think that for my use case, stonith would not be required.<br>
<br>
</span>Always wrong.<br>
<br>
Fencing/Stonith is always required. Doubly so with shared storage.<br>
<span><br>
> Since there are only two nodes accesing the same disk, and no additional<br>
> redundant cluster channels, what will work meanwhile is disabling stonith.<br>
<br>
</span>You will get a split-brain, it is just a matter of time.<br>
<span><br>
> I consider this also because the application that the Web server hosts,<br>
> is stateless, so if no incoming requests are received by the Load<br>
> Balancer, then, no write operations could be performed.<br>
><br>
> At the end, this was the way it worked before HA. What do you think?<br>
<br>
</span>If the program(s) can run independently without coordination, you do not<br>
need HA. If not, you need fencing.<br>
<span><font color="#888888"><br>
--<br>
Digimer<br>
Papers and Projects: <a href="https://alteeve.ca/w/" target="_blank">https://alteeve.ca/w/</a><br>
What if the cure for cancer is trapped in the mind of a person without<br>
access to education?<br>
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