Am Dienstag, 19. August 2008 01:59:09 schrieb Andreas Dilger: > 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.
Yep, that seems to be the case. We setup a new YPserver which solely serves the LUSTRE system and the messages disappears. Not only that. We had problems when copying data onto lustre and starting a 'du' od 'ls -la' on the lustre file system the client hung. https://bugzilla.lustre.org/show_bug.cgi?id=16384 That problem dissapeared as well with the new YPserver. Thanks for your help ! Heiko > > 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