<p></p>
<p>Sridhar Avantsa</p>
<p><a href="mailto:savantsa@gmail.com">savantsa@gmail.com</a><br>
</p>
<div class="gmail_quote">On Aug 7, 2013 3:02 PM, <<a href="mailto:ocfs2-users-request@oss.oracle.com">ocfs2-users-request@oss.oracle.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Today's Topics:<br>
<br>
1. Re: OCFS2 tuning, fragmentation and localalloc option.<br>
Cluster hanging during mix read+write workloads (Goldwyn Rodrigues)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Tue, 06 Aug 2013 20:21:19 -0500<br>
From: Goldwyn Rodrigues <<a href="mailto:rgoldwyn@suse.de">rgoldwyn@suse.de</a>><br>
Subject: Re: [Ocfs2-users] OCFS2 tuning, fragmentation and localalloc<br>
option. Cluster hanging during mix read+write workloads<br>
To: Gavin Jones <<a href="mailto:gjones@where2getit.com">gjones@where2getit.com</a>><br>
Cc: <a href="mailto:ocfs2-users@oss.oracle.com">ocfs2-users@oss.oracle.com</a><br>
Message-ID: <<a href="mailto:5201A10F.3050307@suse.de">5201A10F.3050307@suse.de</a>><br>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed<br>
<br>
Hi Gavin,<br>
<br>
On 08/06/2013 04:51 PM, Gavin Jones wrote:<br>
> Hello Goldwyn,<br>
><br>
> Thanks for taking a look at this. So, then, it does seem to be DLM<br>
> related. We were running fine for a few weeks and then it came up<br>
> again this morning and has been going on throughout the day.<br>
><br>
> Regarding the DLM debugging, I allowed debugging for DLM_GLUE,<br>
> DLM_THREAD, DLM_MASTER and DLM_RECOVERY. However, I don't see any DLM<br>
> logging output in dmesg or syslog --is there perhaps another way to<br>
> get at the actual DLM log? I've searched around a bit but didn't find<br>
> anything that made it clear.<br>
<br>
Unfortunately CONFIG_OCFS2_DEBUG_MASKLOG is not enabled for opensuse<br>
kernels but for SLES kernels only. Sorry about that :(<br>
<br>
However, you can recompile the kernel with this enabled in the config file.<br>
<br>
><br>
> As for OCFS2 and iSCSI communications, they use the same physical<br>
> network interface but different VLANs on that interface. The<br>
> "connectionX:0" errors, then, seem to indicate an issue with the ISCSI<br>
> connection. The system logs and monitoring software don't show any<br>
> warnings or errors about the interface going down, so the only thing I<br>
> can think of is the connection load balancing on the SAN, though<br>
> that's merely a hunch. Maybe I should mail the list and see if anyone<br>
> has a similar setup.<br>
<br>
You will not have anything in the logs if the network issues are<br>
intermittent. Perhaps a simple ping when the issue is occurring is the<br>
best tool.<br>
<br>
My doubts on network issues keep getting stronger by the information you<br>
have given me so far. Also, as Sunil mentioned, you have a problem if<br>
the storage does not respond anyways.<br>
<br>
><br>
> If you could please point me in the right direction to make use of the<br>
> DLM debugging via debugs.ocfs2, I would appreciate it.<br>
><br>
<br>
<snipped><br>
<br>
--<br>
Goldwyn<br>
<br>
<br>
<br>
------------------------------<br>
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End of Ocfs2-users Digest, Vol 116, Issue 4<br>
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</blockquote></div>