Nathan,
Thank you. That works! I found that if I change IP address, I also need to remove the file /mnt/mdt/CONFIGS/*-client. The reason is that the OST mounts failed - the OST was still looking for the old IP Address. I grepped for files with the old IP Address, and I found those client files. Is that a safe thing to do? Please note that my mdt and mgs are on the same LUN. Thanks. -Roger ________________________________ From: Nathan Rutman [mailto:[email protected]] Sent: Tuesday, August 03, 2010 2:03 PM To: Roger Spellman Cc: [email protected] Subject: Re: [Lustre-discuss] Problem with write_conf There's a 'failsafe' feature that prevents filesystem name changes: LustreError: 157-3: Trying to start OBD AFTER-MDT0000_UUID using the wrong disk BEFORE-MDT0000_UUID. Were the /dev/ assignments rearranged? You'll have to go and delete the last_rcvd file off the disk for all the servers in the filesystem as well as tunefs --writeconf them all to the name AFTER name. On Aug 2, 2010, at 6:08 PM, Roger Spellman wrote: Hi, I would like to be able to change a file system name. Towards that end, I have run the following commands as an experiment: mkfs.lustre --reformat --fsname BEFORE --device-size=10000 --mgs --mdt --mgsnode=10.2....@o2ib0 /dev/mapper/map0 dmesg -c mount -t lustre /dev/mapper/map0 /mnt/mdt dmesg -c umount /mnt/mdt dmesg -c tunefs.lustre --writeconf --fsname=AFTER --mgs --mdt /dev/mapper/map0 dmesg -c mount -t lustre /dev/mapper/map0 /mnt/mdt dmesg -c Unfortunately, this does not work. Can someone please explain the correct sequence of commands to ues? The output of each command is as follows. Thanks. [r...@ts-hss2-01 ~]# mkfs.lustre --reformat --fsname BEFORE --device-size=10000 --mgs --mdt --mgsnode=10.2....@o2ib0 /dev/mapper/map0 Permanent disk data: Target: BEFORE-MDTffff Index: unassigned Lustre FS: BEFORE Mount type: ldiskfs Flags: 0x75 (MDT MGS needs_index first_time update ) Persistent mount opts: iopen_nopriv,user_xattr,errors=remount-ro Parameters: mgsnode=10.2....@o2ib mdt.group_upcall=/usr/sbin/l_getgroups device size = 1632256MB 2 6 18 formatting backing filesystem ldiskfs on /dev/mapper/map0 target name BEFORE-MDTffff 4k blocks 2500 options -i 4096 -I 512 -q -O dir_index,extents,uninit_groups -F mkfs_cmd = mke2fs -j -b 4096 -L BEFORE-MDTffff -i 4096 -I 512 -q -O dir_index,extents,uninit_groups -F /dev/mapper/map0 2500 Writing CONFIGS/mountdata [r...@ts-hss2-01 ~]# dmesg -c LDISKFS-fs: barriers enabled kjournald2 starting: pid 1388, dev dm-4:8, commit interval 5 seconds LDISKFS FS on dm-4, internal journal on dm-4:8 LDISKFS-fs: delayed allocation enabled LDISKFS-fs: file extents enabled LDISKFS-fs: mballoc enabled LDISKFS-fs: mounted filesystem dm-4 with ordered data mode LDISKFS-fs: mballoc: 1 blocks 1 reqs (0 success) LDISKFS-fs: mballoc: 1 extents scanned, 0 goal hits, 1 2^N hits, 0 breaks, 0 lost LDISKFS-fs: mballoc: 1 generated and it took 2142 LDISKFS-fs: mballoc: 512 preallocated, 0 discarded [r...@ts-hss2-01 ~]# mount -t lustre /dev/mapper/map0 /mnt/mdt [r...@ts-hss2-01 ~]# dmesg -c LDISKFS-fs: barriers enabled kjournald2 starting: pid 1406, dev dm-4:8, commit interval 5 seconds LDISKFS FS on dm-4, internal journal on dm-4:8 LDISKFS-fs: delayed allocation enabled LDISKFS-fs: file extents enabled LDISKFS-fs: mballoc enabled LDISKFS-fs: mounted filesystem dm-4 with ordered data mode LDISKFS-fs: mballoc: 0 blocks 0 reqs (0 success) LDISKFS-fs: mballoc: 0 extents scanned, 0 goal hits, 0 2^N hits, 0 breaks, 0 lost LDISKFS-fs: mballoc: 0 generated and it took 0 LDISKFS-fs: mballoc: 0 preallocated, 0 discarded LDISKFS-fs: barriers enabled kjournald2 starting: pid 1410, dev dm-4:8, commit interval 5 seconds LDISKFS FS on dm-4, internal journal on dm-4:8 LDISKFS-fs: delayed allocation enabled LDISKFS-fs: file extents enabled LDISKFS-fs: mballoc enabled LDISKFS-fs: mounted filesystem dm-4 with ordered data mode Lustre: MGS MGS started Lustre: mgc10.2....@o2ib: Reactivating import Lustre: Setting parameter BEFORE-MDT0000.mdt.group_upcall in log BEFORE-MDT0000 Lustre: Enabling user_xattr Lustre: BEFORE-MDT0000: new disk, initializing Lustre: BEFORE-MDT0000: Now serving BEFORE-MDT0000 on /dev/mapper/map0 with recovery enabled Lustre: 1503:0:(lproc_mds.c:271:lprocfs_wr_group_upcall()) BEFORE-MDT0000: group upcall set to /usr/sbin/l_getgroups Lustre: BEFORE-MDT0000.mdt: set parameter group_upcall=/usr/sbin/l_getgroups [r...@ts-hss2-01 ~]# umount /mnt/mdt [r...@ts-hss2-01 ~]# dmesg -c Lustre: Failing over BEFORE-MDT0000 Lustre: Skipped 1 previous similar message Lustre: *** setting obd BEFORE-MDT0000 device 'dm-4' read-only *** Turning device dm-4 (0xfd00004) read-only Lustre: BEFORE-MDT0000: shutting down for failover; client state will be preserved. Lustre: MDT BEFORE-MDT0000 has stopped. LustreError: 1517:0:(ldlm_request.c:1025:ldlm_cli_cancel_req()) Got rc -108 from cancel RPC: canceling anyway LustreError: 1517:0:(ldlm_request.c:1587:ldlm_cli_cancel_list()) ldlm_cli_cancel_list: -108 Lustre: MGS has stopped. LDISKFS-fs: mballoc: 3 blocks 3 reqs (0 success) LDISKFS-fs: mballoc: 8 extents scanned, 0 goal hits, 0 2^N hits, 0 breaks, 0 lost LDISKFS-fs: mballoc: 1 generated and it took 2598 LDISKFS-fs: mballoc: 1145 preallocated, 0 discarded Removing read-only on unknown block (0xfd00004) Lustre: server umount BEFORE-MDT0000 complete [r...@ts-hss2-01 ~]# tunefs.lustre --writeconf --fsname=AFTER --mgs --mdt /dev/mapper/map0 checking for existing Lustre data: found CONFIGS/mountdata Reading CONFIGS/mountdata Read previous values: Target: BEFORE-MDT0000 Index: 0 Lustre FS: BEFORE Mount type: ldiskfs Flags: 0x5 (MDT MGS ) Persistent mount opts: iopen_nopriv,user_xattr,errors=remount-ro Parameters: mgsnode=10.2....@o2ib mdt.group_upcall=/usr/sbin/l_getgroups Permanent disk data: Target: AFTER-MDT0000 Index: 0 Lustre FS: AFTER Mount type: ldiskfs Flags: 0x105 (MDT MGS writeconf ) Persistent mount opts: iopen_nopriv,user_xattr,errors=remount-ro Parameters: mgsnode=10.2....@o2ib mdt.group_upcall=/usr/sbin/l_getgroups Writing CONFIGS/mountdata [r...@ts-hss2-01 ~]# dmesg -c LDISKFS-fs: barriers enabled kjournald2 starting: pid 1539, dev dm-4:8, commit interval 5 seconds LDISKFS FS on dm-4, internal journal on dm-4:8 LDISKFS-fs: delayed allocation enabled LDISKFS-fs: file extents enabled LDISKFS-fs: mballoc enabled LDISKFS-fs: recovery complete. LDISKFS-fs: mounted filesystem dm-4 with ordered data mode LDISKFS-fs: mballoc: 1 blocks 1 reqs (0 success) LDISKFS-fs: mballoc: 6 extents scanned, 0 goal hits, 0 2^N hits, 0 breaks, 0 lost LDISKFS-fs: mballoc: 1 generated and it took 2905 LDISKFS-fs: mballoc: 506 preallocated, 0 discarded [r...@ts-hss2-01 ~]# mount -t lustre /dev/mapper/map0 /mnt/mdt mount.lustre: mount /dev/mapper/map0 at /mnt/mdt failed: Invalid argument This may have multiple causes. Are the mount options correct? Check the syslog for more info. [r...@ts-hss2-01 ~]# dmesg -c LDISKFS-fs: barriers enabled kjournald2 starting: pid 1567, dev dm-4:8, commit interval 5 seconds LDISKFS FS on dm-4, internal journal on dm-4:8 LDISKFS-fs: delayed allocation enabled LDISKFS-fs: file extents enabled LDISKFS-fs: mballoc enabled LDISKFS-fs: mounted filesystem dm-4 with ordered data mode LDISKFS-fs: mballoc: 0 blocks 0 reqs (0 success) LDISKFS-fs: mballoc: 0 extents scanned, 0 goal hits, 0 2^N hits, 0 breaks, 0 lost LDISKFS-fs: mballoc: 0 generated and it took 0 LDISKFS-fs: mballoc: 0 preallocated, 0 discarded LDISKFS-fs: barriers enabled kjournald2 starting: pid 1575, dev dm-4:8, commit interval 5 seconds LDISKFS FS on dm-4, internal journal on dm-4:8 LDISKFS-fs: delayed allocation enabled LDISKFS-fs: file extents enabled LDISKFS-fs: mballoc enabled LDISKFS-fs: mounted filesystem dm-4 with ordered data mode Lustre: MGS MGS started Lustre: mgc10.2....@o2ib: Reactivating import Lustre: MGS: Logs for fs AFTER were removed by user request. All servers must be restarted in order to regenerate the logs. Lustre: Setting parameter AFTER-MDT0000.mdt.group_upcall in log AFTER-MDT0000 Lustre: Enabling user_xattr LustreError: 157-3: Trying to start OBD AFTER-MDT0000_UUID using the wrong disk BEFORE-MDT0000_UUID. Were the /dev/ assignments rearranged? LustreError: 1665:0:(mds_fs.c:828:mds_fs_setup()) cannot read last_rcvd: rc = -22 LustreError: 1665:0:(handler.c:2007:mds_setup()) AFTER-MDT0000: MDS filesystem method init failed: rc = -22 LustreError: 1665:0:(obd_config.c:372:class_setup()) setup AFTER-MDT0000 failed (-22) LustreError: 1665:0:(obd_config.c:1199:class_config_llog_handler()) Err -22 on cfg command: Lustre: cmd=cf003 0:AFTER-MDT0000 1:AFTER-MDT0000_UUID 2:0 3:AFTER-MDT0000 LustreError: 15b-f: mgc10.2....@o2ib: The configuration from log 'AFTER-MDT0000' failed (-22). Make sure this client and the MGS are running compatible versions of Lustre. LustreError: 15c-8: mgc10.2....@o2ib: The configuration from log 'AFTER-MDT0000' failed (-22). This may be the result of communication errors between this node and the MGS, a bad configuration, or other errors. See the syslog for more information. LustreError: 1566:0:(obd_mount.c:1124:server_start_targets()) failed to start server AFTER-MDT0000: -22 LustreError: 1566:0:(obd_mount.c:1653:server_fill_super()) Unable to start targets: -22 LustreError: 1566:0:(obd_config.c:443:class_cleanup()) Device 4 not setup LustreError: 1566:0:(ldlm_request.c:1025:ldlm_cli_cancel_req()) Got rc -108 from cancel RPC: canceling anyway LustreError: 1566:0:(ldlm_request.c:1587:ldlm_cli_cancel_list()) ldlm_cli_cancel_list: -108 Lustre: MGS has stopped. LDISKFS-fs: mballoc: 1 blocks 1 reqs (0 success) LDISKFS-fs: mballoc: 6 extents scanned, 0 goal hits, 0 2^N hits, 0 breaks, 0 lost LDISKFS-fs: mballoc: 1 generated and it took 2883 LDISKFS-fs: mballoc: 503 preallocated, 0 discarded Lustre: 1566:0:(obd_mount.c:1473:server_put_super()) Cleaning orphaned obd AFTER-mdtlov Lustre: server umount AFTER-MDT0000 complete LustreError: 1566:0:(obd_mount.c:2045:lustre_fill_super()) Unable to mount (-22) Roger Spellman Staff Engineer Terascala, Inc. 508-588-1501 www.terascala.com <http://www.terascala.com/> _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
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