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<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>Hello,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'> </span></font><span lang=EN-GB>I’m
working with OCFS2 on Radhat Advanced Server 4 Patch 3 and I had kernel panics
too. I use OCFS2 only for RAC archive logs and RMAN backups.<o:p></o:p></span></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span lang=EN-GB
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span lang=EN-GB
style='font-size:11.0pt'> Well, I’m testing one solution and
seems to be fine:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span lang=EN-GB
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt;text-indent:35.4pt'><font
size=2 color=blue face=Georgia><span lang=EN-GB style='font-size:11.0pt'>In
/etc/ocfs2/cluster.conf I have replaced the public IPs by the heartbeat IPs (parameter
ip_address), but keeping the names.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span lang=EN-GB
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span lang=EN-GB
style='font-size:11.0pt'> Is there anyone that knows this solution
and have tested it with fails?<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span lang=EN-GB
style='font-size:11.0pt'> <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>Regards from Spain,<o:p></o:p></span></font></p>
<p class=MsoPlainText><b><u><font size=2 color=blue face=Georgia><span
lang=EN-GB style='font-size:11.0pt;font-weight:bold'>MARTÍN<o:p></o:p></span></font></u></b></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span lang=EN-GB
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span lang=EN-GB
style='font-size:11.0pt'>-----Mensaje original-----<br>
De: ocfs2-users-bounces@oss.oracle.com [mailto:ocfs2-users-bounces@oss.oracle.</span>com]
En nombre de Alexei_Roudnev<br>
Enviado el: miércoles, 04 de octubre de 2006 0:49<br>
Para: Sunil Mushran; ocfs2-users<br>
Asunto: Re: [Ocfs2-users] Re: FW: Use of OCFS2 file systems.</font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>Unfortunately, it MAKES CLUSTER LESS STABLE. It works
until network and SAN<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>systems afe fine, but is not so good in failed
situations.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>Even if we use OCFSv2 for idle file systems (which do
nothing 90% of the<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>time) , o2cb reboots nodes when lost heartbeat<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>or (worst) network or (even worst) both... Instead of
trying to recover<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>without it (as I said 0- FS is in consistant state,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>no activity at all).<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>It is not just OCFSv2 problem - Oracle CSS behave
simular (butis much more<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>stable in reality), and Linux HA cluster<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>too (but it can use different heartbeat conenctions so
it can be configured<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>very reliable).<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>You are right saying that _cluster software always
have a tendency to fence<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>or kill neighbours to keep<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>internal consistancy_. But OCFSv2 is one of he worst
examples of such<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>software.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>What can be done _relatively easy_.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>(1) as we saiud many times - redundancy and better
timeout control in<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>heartbeat. (Of course, long timeouts means _long
recovery_, but it's OK for<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>90%<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>installations). Typical network recovery is 1 minute,
not 10 seconds.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>(2) System should not make bad things IF it is in
consistant state. In many<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>cases, if system have not outstanding IO requests, it
can recover<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>without server reboot (or at least try to do it) even
if it lost heartbeats<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>and suspect, that other systems could take control out
of it.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>It is serious theoretical challenge _how to do it
safely_, but it is very<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>desired for such systems.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>(3) In some configurations, FS can be treated as _not
so important_. It<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>means that it is safer to switch into red_only and try
to recover online,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>but not panic. Good example - you have production
Oracle which uses ASM, and<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>you use OCFSv2 for backup storage. IT is safer to make
IOP failure on this<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>storage vs rebooting system without reasons.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>PS. I had 2 network outages in the lab today,m because
of bad UPS - and in<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>all cases, ALL OCFSv2 servers (in 2 different
clusters) rebooted. No one<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>survived short (30 seconds) lost of Ethernet
conenction (including iSCSI).<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>In some cases, one server rebooted by OCFS and otehr
by another part of the<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>cluster (HA or RAC) - but result is exactly this -
_all_ OCFSv2 panic on a<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>shport network/san outage, in all cases.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>----- Original Message ----- <o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>From: "Sunil Mushran"
<Sunil.Mushran@oracle.com><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>To: "ocfs2-users"
<ocfs2-users@oss.oracle.com><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>Sent: Tuesday, October 03, 2006 1:51 PM<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>Subject: [Ocfs2-users] Re: FW: Use of OCFS2 file
systems.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> I try to avoid responding to such emails because
I am not sure how<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> much credibility a partisan has in such debates.
After all I have been<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> working on OCFS/OCFS2 the last 4/5 years.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> Having said that, I have some issues with the
statements. While it is true<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> that we can improve on the disk/net heartbeat, it
is wrong to say that it<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> does not work or makes the cluster unstable.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> We have OCFS2 running on lots of clusters in
Oracle that are testing each<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> new revision of the database. While these
machines are test boxes, they<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>are<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> all running loads designed to break Oracle. I am
rarely pinged about them<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> hitting an OCFS2 issue.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> We also have internal production databases as
well as Oracle customers who<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> are using OCFS2 with much success.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> However, we do have room for improvement and we
are working on it.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> For the list of ongoing projects, you can peruse
the OCFS2 Development<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> Wiki at http://oss.oracle.com/osswiki/OCFS2.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> If you wish to contribute code, as this is an
open source project, feel<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>free<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> to ping me or the ocfs2-devel@oss.oracle.com
mailing list.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> Thanks<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> Sunil Mushran<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > Hi Sunial,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > What are your thoughts about this message on
the mailing lists?<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > Thanks!<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > Sanjeet<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> >
------------------------------------------------------------------------<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > *From:* ocfs2-users-bounces@oss.oracle.com<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > [mailto:ocfs2-users-bounces@oss.oracle.com]
*On Behalf Of<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>*Alexei_Roudnev<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > *Sent:* Friday, September 29, 2006 11:50 PM<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > *To:* Bill Wells; Sunil Mushran<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > *Cc:* ocfs2-users@oss.oracle.com<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > *Subject:* Re: [Ocfs2-users] Use of OCFS2
file systems.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > If you can avoid OCFSv2 on a RAC server,
better do it. Any cluster<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > (RAC and OCFS) have it's own instability
elements (OCFSv2 have a poor<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > heartbeat alghoritm and so tend to
self-fence without real failure,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > and (in addition) is relatively new. It
works fine enough to be used,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > when you really need file sharing (such as
database files or backups<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > or even archive logs), but the less you use
it, the better. Oracle<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > home files feels well without sharing.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > // I don't see problems with OCFSv2 on SLES9
SP3-updated, but I avoid<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > to use it for mission critical file systems
or heavy-duty file systems,<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > // and I still have failure scenario, when
RAC cluster could work but<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > OCFS cause full-cluster failure<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > // If you have network problem, SAN<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > // system restart, disk io error, etc etc -
you can end up with system<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > panic or reboot, caused by OCFS -<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> > // so the less OCFS you have, the better is
your system stability.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> ><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> _______________________________________________<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> Ocfs2-users mailing list<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>> Ocfs2-users@oss.oracle.com<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>>
http://oss.oracle.com/mailman/listinfo/ocfs2-users<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 color=blue face=Georgia><span
style='font-size:11.0pt'>_______________________________________________<o:p></o:p></span></font></p>
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