I am trying to get a lustre client to mount the service, but with one or
more OST disabled. This does not appear to be working. Lustre version
is 1.8.4.
mount -o localflock,exclude=umt3-OST0019 -t lustre
10.10.1....@tcp0:/umt3 /lustre/umt3
dmesg on this client shows the following during the umount/mount sequence:
Lustre: client ffff810c25c03800 umount complete
Lustre: Skipped 1 previous similar message
Lustre: mgc10.10.1....@tcp: Reactivating import
Lustre: 450250:0:(obd_mount.c:1786:lustre_check_exclusion()) Excluding
umt3-OST0019 (on exclusion list)
Lustre: 450250:0:(obd_mount.c:1786:lustre_check_exclusion()) Skipped 1
previous similar message
Lustre: 5942:0:(client.c:1476:ptlrpc_expire_one_request()) @@@ Request
x1354682302740498 sent from umt3-MDT0000-mdc-ffff810628209000 to NID
10.10.1...@tcp 0s ago has failed due to network error (5s prior to
deadline).
r...@ffff810620e66400 x1354682302740498/t0
o38->umt3-mdt0000_u...@10.10.1.49@tcp:12/10 lens 368/584 e 0 to 1 dl
1292342239 ref 1 fl Rpc:N/0/0 rc 0/0
Lustre: 5942:0:(client.c:1476:ptlrpc_expire_one_request()) Skipped 1
previous similar message
Lustre: Client umt3-client has started
When I check following the mount, using "lctl dl", I see the following,
and it is clear that the OST is active as far as this client is concerned.
19 UP osc umt3-OST0018-osc-ffff810628209000
05b29472-d125-c36e-c023-e0eb76aaf353 5
20 UP osc umt3-OST0019-osc-ffff810628209000
05b29472-d125-c36e-c023-e0eb76aaf353 5
21 UP osc umt3-OST001a-osc-ffff810628209000
05b29472-d125-c36e-c023-e0eb76aaf353 5
Two questions here. The first, obviously, is what is wrong with this
picture? Why can't I exclude this OST from activity on this client? Is
it because the OSS serving that OST still has the OST active? If the
OST were deactivated or otherwise unavailable on the OSS, would the
client mount then succeed to exclude this OST? (OK, more than one
question in the group....)
Second group, what is the correct syntax for excluding more that one
OST? Is it a comma-separated list of exclusions, or are separate
excludes required?
mount -o localflock,exclude=umt3-OST0019,umt3-OST0020 -t lustre
10.10.1....@tcp0:/umt3/lustre/umt3
or
mount -o localflock,exclude=umt3-OST0019,exclude=umt3-OST0020 -t
lustre 10.10.1....@tcp0:/umt3 /lustre/umt3
Thanks,
bob
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