On Aug 18, 2008 15:46 +0200, Heiko Schroeter wrote: > from time to time we see these messages on our MDS 1.6.5.1 during > copying data onto lustre. > > Is this just informational or an indicator of a broken setup ? Network load > problems ? > > We checked the group rights and they look ok to us. The lustre MDS system > including clients runs with YP setup. It seems to us that the message comes > from "lustre-1.6.5.1/lustre/utils/l_getgroups.c". But we cannot nail down > the real reason.
> Aug 18 14:39:53 mds1 l_getgroups: LONG OP getgrent loop: 25 elapsed, 3 > expected > Aug 18 14:39:53 mds1 l_getgroups: LONG OP get_groups_local: 25 elapsed, 10 > expected The reason is that it seems YP is taking longer than Lustre has expected it to. You should be able to remove these messages by increasing the timeout in /proc/fs/lustre/mds/{mds}/group_acquire_expire. You might also reduce the load on the YP server by increasing the group cache lifetime by increasing /proc/fs/lustre/mds/{mds}/group_expire_interval (default 600 seconds). The message itself isn't harmful, just a warning at this point that your name services are taking longer than expected. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. _______________________________________________ Lustre-discuss mailing list Lustre-discuss@lists.lustre.org http://lists.lustre.org/mailman/listinfo/lustre-discuss