Hello, We have a newly setup GFS2 cluster on a shared FC storage with three nodes. After setting up the backup software we noticed that it ran very slow, and investigated. It turns out that we have about a million files in varying sizes, and that stat()'ing these takes a long time. For example, a "find" command on the GFS share, limited to 4000 files, takes 0.021s. A "find -ls" command in the same circumstances takes 17 seconds...! And that is only to get the permissions/ownership etc, no data reading. We've looked for GFS tuning tips and the filesystem is mounted with noatime,nodiratime, statfs_slow=0, etc. ping_pong gives about 3200 locks/s for read and write. Also tried mounting only one node and having a local lock manager, with some better performance but not satisfactory. Using a non-cluster filesystem on the same SAN manages "find -ls" in the order of a fraction of a second, which suggests that it's GFS that . Should it be this slow? Any hints to improve performance or to do debugging? Regards SK -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
