On Tue, Dec 03, 2013 at 11:50:57PM +1100, Dave Chinner wrote:
thanks very much for your quick and detailled answer!
> OK, 32GB RAM, no obvious shortage, no dirty or writeback data.
> 2TB SATA drives, 32AGs, only unusual setting is 64k directory block
yes, the 64k was taken from a too quickly read of advice, I don't think
it's of any help on a ceph cluster but I'm not an FS guru. Is there a
way to lower it at runtime?
> Yup, there's your problem:
> Which, I think, is pretty easy to do. Yup, barely smoke tested patch
> below that demonstrates the fix. Beware - patch may eat babies and
> ask for more. Use it at your own risk!
unfortunatly I cannot test this patch because:
- it's a production cluster and it's currently hard for me to reboot
nodes (not enough nodes ;))
- just after hiting this problem I saw a kernel 3.11 available on Debian
backports and decided to upgrade the whole cluster.
since this upgrade, there is no problems anymore ... I cross my fingers