[lustre-discuss] lustre for home directories
andreas.dilger at intel.com
Wed Apr 25 11:31:24 PDT 2018
On Apr 25, 2018, at 11:09, Riccardo Veraldi <Riccardo.Veraldi at cnaf.infn.it> wrote:
> just wondering if who is using lustre for home directories with several
> users is happy or not.
I can't comment for other people, but there are definitely some sites that are using Lustre for the /home directories. Hopefully they will speak up here.
> I am considering to move home directories from NFS to Lustre/ZFS.
> it is quite easy to send the NFS server in troubles with just a few
> users copying files around.
> What special tuning is needed to optimize Lustre usage with small files?
> I guess 1M record size wold not be a good choice anymore.
You should almost certainly use a default of stripe_count=1 for home directories, on the assumption that files should not be gigantic.
In that case, stripe size does not matter if you have 1-stripe files. This does not affect the on-disk allocation size. If you have dedicated OSTs for the /home directories, then I'd recommend NOT to use recordsize=1M for ZFS, and instead leave it at the default (recordsize=128k).
Lustre Principal Architect
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