2 the writeconf procedure – HP StorageWorks Scalable File Share User Manual
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# debugfs -c -R 'dump CONFIGS/testfs-client /tmp/testfs-client' /dev/mapper/mpath0
debugfs 1.40.7.sun3 (28-Feb-2008)
/dev/mapper/mpath0: catastrophic mode - not reading inode or group bitmaps
# llog_reader /tmp/testfs-client
Header size : 8192
Time : Fri Oct 31 16:50:52 2008
Number of records: 20
Target uuid : config_uuid
-----------------------
#01 (224)marker 3 (flags=0x01, v1.6.6.0) testfs-clilov 'lov setup' Fri Oct 3 1 16:50:52 2008-
#02 (120)attach 0:testfs-clilov 1:lov 2:testfs-clilov_UUID
#03 (168)lov_setup 0:testfs-clilov 1:(struct lov_desc) uuid=testfs-clilov_UUID stripe:cnt=1
size=1048576 offset=0 patt ern=0x1
#04 (224)marker 3 (flags=0x02, v1.6.6.0) testfs-clilov 'lov setup' Fri Oct 3 1 16:50:52 2008-
#05 (224)marker 4 (flags=0x01, v1.6.6.0) testfs-MDT0000 'add mdc' Fri Oct 31 16:50:52 2008-
#06 (088)add_uuid nid=172.31.97.1@o2ib(0x50000ac1f6101) 0: 1:172.31.97.1@o2ib
#07 (128)attach 0:testfs-MDT0000-mdc 1:mdc 2:testfs-MDT0000-mdc_UUID
#08 (144)setup 0:testfs-MDT0000-mdc 1:testfs-MDT0000_UUID 2:172.31.97.1@o2 ib
#09 (088)add_uuid nid=172.31.97.2@o2ib(0x50000ac1f6102) 0: 1:172.31.97.2@o2ib
#10 (112)add_conn 0:testfs-MDT0000-mdc 1:172.31.97.2@o2ib
#11 (128)mount_option 0: 1:testfs-client 2:testfs-clilov 3:testfs-MDT0000-mdc
#12 (224)marker 4 (flags=0x02, v1.6.6.0) testfs-MDT0000 'add mdc' Fri Oct 31 16:50:52 2008-
#13 (224)marker 8 (flags=0x01, v1.6.6.0) testfs-OST0000 'add osc' Fri Oct 31 16:51:29 2008-
#14 (088)add_uuid nid=172.31.97.2@o2ib(0x50000ac1f6102) 0: 1:172.31.97.2@o2ib
#15 (128)attach 0:testfs-OST0000-osc 1:osc 2:testfs-clilov_UUID
#16 (144)setup 0:testfs-OST0000-osc 1:testfs-OST0000_UUID 2:172.31.97.2@o2 ib
#17 (088)add_uuid nid=172.31.97.1@o2ib(0x50000ac1f6101) 0: 1:172.31.97.1@o2ib
#18 (112)add_conn 0:testfs-OST0000-osc 1:172.31.97.1@o2ib
#19 (128)lov_modify_tgts add 0:testfs-clilov 1:testfs-OST0000_UUID 2:0 3:1
#20 (224)marker 8 (flags=0x02, v1.6.6.0) testfs-OST0000 'add osc' Fri Oct 31 16:51:29 2008-
#
5.5.1.2 The writeconf Procedure
Sometimes a client does not connect to one or more components of the file system despite the
file system appearing healthy. This might be caused by information in the configuration logs.
Frequently, this situation can be corrected by the use of the "writeconf procedure" described in
the Lustre Operations Manual section 4.2.3.2.
To see if the problem can be fixed with writeconf, run the following test:
1.
On the MGS node run:
[root@adm ~]# debugfs -c -R 'dump CONFIGS/testfs-client /tmp/testfs-client' /dev/mapper/mpath0
Replace testfs with file system name and mpath0 with mpath for MGS device.
2.
Convert the dump file to ASCII:
[root@adm ~]# llog_reader /tmp/testfs-client > /tmp/testfs-client.txt
[root@adm ~]# grep MDT /tmp/testfs-client.txt
#05 (224)marker 4 (flags=0x01, v1.6.6.0) scratch-MDT0000 'add mdc' Wed Dec 10 09:53:41 2008-
#07 (136)attach 0:scratch-MDT0000-mdc 1:mdc 2:scratch-MDT0000-mdc_UUID
#08 (144)setup 0:scratch-MDT0000-mdc 1:scratch-MDT0000_UUID 2:10.129.10.1@o2ib
#09 (128)mount_option 0: 1:scratch-client 2:scratch-clilov 3:scratch-MDT0000-mdc
#10 (224)marker 4 (flags=0x02, v1.6.6.0) scratch-MDT0000 'add mdc' Wed Dec 10 09:53:41 2008-
The problem is in line #08. The MDT is related to 10.129.10.1@o2ib, but in this example the
IP address is for the MGS node not the MDT node. So MDT will never mount on the MDT
node.
To fix the problem, use the following procedure:
IMPORTANT:
The following steps must be performed in the exact order as they appear below.
1.
Unmount HP SFS from all client nodes.
# umount /testfs
2.
Stop Heartbeat on HP SFS server nodes.
a.
Stop the Heartbeat service on all the OSS nodes:
# pdsh -w oss[1-n] service heartbeat stop
b.
Stop the Heartbeat service on the MDS and MGS nodes:
# pdsh -w mgs,mds service heartbeat stop
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