Hi, after running Ceph for a while I see a lot of fragmented files on our OSD filesystems (all running ext4). For example: itchy ~ # fsck -f /srv/ceph/osd/ceph-5 fsck von util-linux 2.22.2 e2fsck 1.42 (29-Nov-2011) [...] /dev/mapper/vgosd00-ceph--osd00: 461903/418119680 files (33.7% non-contiguous), 478239460/836229120 blocks This is an unusually high value for ext4. The normal expectation is something in the 5% range. I suspect that such a high fragmentation produces lots of unnecessary seeks on the disks. Has anyone an idea what to do to make Ceph fragment an OSD filesystem less? TIA Christian -- Dipl.-Inf. Christian Kauhaus <>< · kc@xxxxxxxxxx · systems administration gocept gmbh & co. kg · Forsterstraße 29 · 06112 Halle (Saale) · Germany http://gocept.com · tel +49 345 219401-11 Python, Pyramid, Plone, Zope · consulting, development, hosting, operations _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |