[Ocfs2-users] Support and Stability

[Sunil Mushran]

Fragmentation has been atop our dev priority list for sometime
now. That is, both, reducing it and handling it better when it does
get fragmented.

Just last week we pushed patches for the same into the newly
created 2.6.35.
http://oss.oracle.com/pipermail/ocfs2-devel/2010-May/006511.html

As always, these features will eventually trickle down to the prod
releases.

Sunil

On 05/24/2010 12:41 PM, Brian Kroth wrote:
> Michael Austin<onedbguru at gmail.com>  2010-05-24 13:32:
>    
>>     I would like to get some feedback on the overall perception on the support
>>     and stability of OCFS2 (latest).  This tool looks like a perfect fit for
>>     a production system I am planning, but, due to it's open source roots,
>>     there are some concerns about s&s.  The app will be deemed mission
>>     critical with very little tolerance for any downtime (24x365). 
>>
>>     Thanks.
>>
>>     M. Austin
>>     Consultant
>>      
> It pains me to, but I can't say I'd recommend it for something like a
> mail setup that has heavy write of tiny files.  There's a fragmentation
> issue that burned us bad recently and before that a locking issue
> (search the archives).  Even then I have to say that the Oracle devs
> were responsive to us even without a service contract, for which I'm
> very grateful.  You might have better luck with a "supported" distro.
> I've always used mainline kernels with Debian.
>
> That said, I had been using an earlier version for a web server backend
> (couple of TB, mostly read) and a video streaming library (_many_ TB and
> _lots_ of read traffic) for a long time without any reports of problems.
> I don't work there anymore, but from what I hear everything's still
> humming along without interruption (that should be read overall cluster
> interruption) for almost 3 years now.  That even with crummy server rooms
> that try bake their inhabitants from time to time :)
>
> I will also say just off hand that OCFS2 is still the best OSS shared
> disk cluster fs I've tried.  I've tested GFS2 off and on for a couple of
> years and it still has a rather trivial deadlock case:
>
> # cssh node1 node2 node3
> # mkdir /cluster/$HOSTNAME
> # touch /cluster/$HOSTNAME/test
> # rm -rf /cluster/*
>
> Cheers,
> Brian
>    
>
>
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