On Friday 29 October 2004 09:32, Ritesh Agrawal wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > > Hi All, > > ~ I have a problem related to GFS deployment on a SAN volume, > > ~ SCENARIO: > > ~ Clustered Mail Server application > > ~ Environment: > ~ RedHat ES 3.0 > ~ Redhat Cluster Suite > ~ Cluster file system - GFS (ver 6.0) on ex3fs Um. Can you elaborate on this a bit? GFS ext3? > > ~ DELL PowerEdge 1550 / 2650 / 1650 / 1750 > ~ EMC CX series > ~ HBA Qlogix 23xx > > ~ SET-UP > ~ DNS--> load balancer(s) --> cluster node + file lock management --> SAN > ~ (mutli LUN) > ~ single file lock manager in the cluster (one among the cluster nodes) > ~ 3 nodes in backend cluster to handle POP3 and SMTP requests > ~ data stored in SAN, block size 128K, read / write cache enabled > > ~ all the nodes have direct access to SAN through fibre channel > > ~ In the migration process , when there were 3 nodes , all the systems > ~ were running smoothly > ~ but ! > ~ when I added some more load (mailboxes) with 2 more backend nodes, after > ~ some time 2-3 nodes (any of the nodes in cluster) hanged with the > ~ following error: > > ~ Oct 24 11:04:29 c5 kernel: GFS: Assertion failed on line 599 of file > ~ inode.c > ~ Oct 24 11:04:29 c5 kernel: GFS: assertion: "(tmp_gh->gh_flags > ~ &GL_LOCAL_EXCL) || !(gh->gh_flags & GL_LOCAL_EXCL)" > ~ Oct 24 11:04:29 c5 kernel: GFS: time = 1095145469 Oct 24 11:04:29 c5 > ~ kernel: GFS: fsid=310farm:gfs01.2: glock = (4, 0) > ~ Oct 24 11:04:29 c5 kernel: > ~ Oct 24 11:04:29 c5 kernel: Kernel panic: GFS: Record message above and > ~ reboot. > > ~ (LOCK MANAGER STILL KEEPS RUNNING and other nodes function properly) > ~ I tried with different configurations of Lock manager but failed to get > ~ it right. > > ~ Is the problem with > > ~ GFS (any limitations ?????????) > ~ I/O > ~ block size > ~ lock management > ~ or (my architecture itself) > > > ~ How can i resolve this issue? > ~ I am unable to find out proper reason of this. > ~ Can someone of you who's had hands on this help me out? > > ~ Thanks for all those wonderful (non-witty) answers ! > ~ Thorough solutions on the above win a linux friend :-) ! > > - - -- > Regards > Ritesh Agrawal > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.2.2 (GNU/Linux) > Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org > > iD8DBQFBglSEFoz+P95jnTIRAuFsAJ9zK0zu8O6F5tGqZ6I1NSTGnLInzgCbBVU9 > 5qzDkbXxS/DSRGF6ABGYm0Y= > =gFBU > -----END PGP SIGNATURE-----
