Am 30.08.2013 21:40, schrieb Robert Hajime Lanning: > On 08/29/13 10:50, Tobias Reinhard wrote: >> Hi! >> >> I would like to defrag the XFS partition on which my glusterfs brick is. >> Normally no program cares about xfs_fsr. >> >> Just to make sure: is it "safe" to run xfs_fsr on a glusterfs brick >> while everything is online or does any part of glusterfs gets confused? >> >> I have a two node replicated volume (if that is relevant) running >> glusterfs 3.4 > > The GlusterFS server is all userspace. So, as long as you are not > taking the underlying (XFS) filesystem offline, it won't care one bit. > > Though you might see a performance hit for anything doing I/O to the > filesystem in question. > > Do you run your filesystems near full capacity? (wondering why you > need a defrag.) > The FS is 70% full (on a 3.5TB parition). I placed some KVM images on the cluster in QED format. It seems they get fragmented as they grow. Whenever a node goes offline and gets online again the self-healing is nearly killing the cluster. The images are only read at 15mb/s. Even throtteling down the self-heal only helps a little. I'll try if a defrag solves this issue. Tobias
