[Ocfs2-users] Recommended settings for mkfs.ocfs2

Brian Kroth bpkroth at gmail.com
Mon Apr 19 06:53:47 PDT 2010


lenny-backports has a 2.6.32 based kernel that might already have the
free space fix in it.  I haven't checked yet.

Also you don't really explain what you're trying to use the data store
for (eg: lots of small files, video files, heavy writes, heavy reads,
random, sequential, etc.).  It may impact the options you want to give
to mkfs.

Brian

Andrew Robert Nicols <andrew.nicols at luns.net.uk> 2010-04-19 10:06:
> I'm planning to deploy a new data store using a pair of servers running
> Debian Lenny and using DRBD to replicate data between them. 
> 
> My intention is to use ocfs2 as the file system on these so that we can
> operate in a dual primary mode.
> 
> The raid device I'm using gives 15TB of usable space and, having had a
> brief look through the ocfs2-users archive, I see that in January an issue
> with space left on device was fixed, but this isn't available in the stock
> Lenny kernel yet (2.6.26).
> 
> From the notes on the bug, I see that altering the number of slots on the
> file system can help to alleviate the issue, but what are the
> recommendations on what mkfs.ocfs2 options work best.
> 
> I've already created the file system with 2 node slots, but I see from
> comment #13 that Sunil recommends against adding slots. I am free to
> re-create the file system if need be.
> 
> To summarise:
> * 2 Node cluster
> * 15TB storage
> * ocfs2-tools version 1.4.1
> * 2.6.26 kernel
> 
> Any advice would be gratefully received,
> 
> Andrew Nicols
> 
> -- 
> Systems Developer
> 
> e: andrew.nicols at luns.net.uk
> im: a.nicols at jabber.lancs.ac.uk
> t: +44 (0)1524 5 10147
> 
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