On Mon, Apr 18, 2011 at 1:56 PM, Zenon Panoussis <[email protected]> wrote: > > On 04/18/2011 08:41 PM, Colin McCabe wrote: > >> I added "Mount the partition you are logging to using noatime" as a >> "tip" on http://ceph.newdream.net/wiki/Cluster_configuration > > Aha, and I had put a word about noatime for the OSD partition in > http://ceph.newdream.net/wiki/Mounting_the_file_system . Obviously it doesn't > make much of a difference on writes, but it makes a HUGE difference on reads. > > Z
Oh yeah. mtime and ctime are the relevant things for writing (i.e. logging.) Well, I feel dumb now. I'm sure there are other optimizations you could do for the logging partition. I'm curious how much you saved by disabling logging. Also, how are you measuring performance? sincerely, Colin > > > > > > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
