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which kernel ? <br>
<br>
<div class="moz-cite-prefix">On 10/21/2015 06:53 AM, tomaz kosir
wrote:<br>
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<blockquote cite="mid:562798C5.3000504@oracle.com" type="cite">
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Hi All,<br>
<br>
cst has ovm crash 2 weeks ago due to network outage. This has been
somehow fixed now.<br>
Now we are searching for some hints how to prevent such issues in
the feature.<br>
What we are thinking about is to increase o2cb timeouts. If we
increase those timeouts to ie. 1h, does this mean we'll have 1hour
to fix network outage? Disk are connected directly, we have no
issues with that during network outage.<br>
<br>
There is interesting note Increase OC2B Cluster Heartbeat Timeout
on Exalogic Virtual (Doc ID 1995593.1):<br>
<blockquote>A detailed step-by-step procedure is provided in this
document to increase the O2CB cluster heartbeat timeout from 5
min to a very large value of 24 hr. The increased timeout
effectively prevents a catastrophic reboot of all compute nodes
on an Exalogic rack in a virtual configuration due to fencing,
in the event of ZFS taking a long time to complete a takeover.<br>
</blockquote>
<br>
If O2CB_HEARTBEAT_THRESHOLD and O2CB_IDLE_TIMEOUT_MS are huge, OVS
servers will survive long network outage.<br>
What is much better then to get node crash which couse a lot of
work to setup cluster back to working state.<br>
<br>
Many thanks,<br>
Tomaž<br>
<br>
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