> ServerA(mon+osd): > Filesystem Size Used Avail Use% Mounted on > /dev/sda1 9.2G 2.4G 6.4G 27% / > tmpfs 5.9G 0 5.9G 0% /lib/init/rw > udev 5.9G 148K 5.9G 1% /dev > tmpfs 5.9G 0 5.9G 0% /dev/shm > /dev/sda7 674G 483M 629G 1% /var/lib/ceph/mon > /dev/sda6 917G 2.4G 868G 1% /var/lib/ceph/osd/ceph-4 I see that you have separate partitions for osd and mon. Some of them are on the same disk as OS. I would strongly recommend having separate disk (not just partition) for each osd. There is another problem probably more important. By default journal is stored in /var/lib/ceph/osd/$cluster-$id/journal which means you have data and journal on the same disk. It is what slows you down the most. I was amazed how faster the cluster can be just by putting the journal somewhere else (tmpfs - only for tests, another disk). From my experiance, there is no need for separate disk for mon. It can go with OS. Run rados bench everytime you make an improvement in your cluster. -- Regards Maciej Galkiewicz -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
