[Linux-cluster] data journaling for increased performance

[David Teigland]

On Wed, Sep 06, 2006 at 05:09:54PM +0200, Riaan van Niekerk wrote:
> has anyone been able to use GFS data journaling to get any measurable 
> performance boost? For those unfamiliar:
> 
> http://www.redhat.com/docs/manuals/csgfs/browse/rh-gfs-en/s1-manage-data-journal.html
> 
> We have a 2.6 TB maildir mail store (e.g. lots of small files) and think 
> of implementing it (we will take any performance increase we can get as 
> long as it does not impact reliability), and even though it will only 
> apply to new files.
> 
> Also, is it possible to check if the inherit_jdata (for directories) or 
> jdata (for files) flag has been set?

'gfs_tool stat' will show the gfs-specific flags on files or directories.

Dave