[LU-14418] lfs setstripe -c "" removes pool allocation

Tue, 22 Mar 2022 14:50:56 +0000

One of our user groups was setting lfs setstripe -c "$STRIPE_COUNT" in a script and not checking the variable existed. Therefore at some point they managed to run the equivalent of

lfs setstripe -c ""

Testcase (Client: cray-lustre-default-2.7.5.13_4.4.180-6.0.7.1_16.13__gddebdf5c6.x86_64, Server: 2.10.8)

whi550@galaxy-1 [2021-02-04 13:26] /askapbuffer/payne/whi550/testing> mkdir lfs_testing
whi550@galaxy-1 [2021-02-04 13:26] /askapbuffer/payne/whi550/testing> cd lfs_testing
whi550@galaxy-1 [2021-02-04 13:26] /askapbuffer/payne/whi550/testing/lfs_testing> lfs getstripe .
.
stripe_count:   1 stripe_size:    1048576 stripe_offset:  -1 pool:           processing
whi550@galaxy-1 [2021-02-04 13:26] /askapbuffer/payne/whi550/testing/lfs_testing> lfs setstripe -c "" .
whi550@galaxy-1 [2021-02-04 13:26] /askapbuffer/payne/whi550/testing/lfs_testing> lfs getstripe .
.
stripe_count:   1 stripe_size:    1048576 stripe_offset:  -1

testcase on 2.12. (lustre-client-2.12.5-1.x86_64, server lustre-2.12.6-1.el7.x86_64)

set up pools on server:

[root@pgfs-mds4 ~]# mount /dev/mapper/TEST_MGT
[root@pgfs-mds4 ~]# mount /dev/mapper/TEST_OST0000
[root@pgfs-mds4 ~]# mount /dev/mapper/TEST_OST0001
[root@pgfs-mds4 ~]# mount /dev/mapper/TEST_MDT0000
[root@pgfs-mds4 ~]# lctl pool_list testfs
Pools from testfs:
[root@pgfs-mds4 ~]# lctl pool_new testfs.ost0
Pool testfs.ost0 created
[root@pgfs-mds4 ~]# lctl pool_new testfs.ost1
Pool testfs.ost1 created
[root@pgfs-mds4 ~]# lctl pool_add testfs.ost0 testfs-OST0000
OST testfs-OST0000_UUID added to pool testfs.ost0
[root@pgfs-mds4 ~]# lctl pool_add testfs.ost1 testfs-OST0001
OST testfs-OST0001_UUID added to pool testfs.ost1
[root@pgfs-mds4 ~]# rpm -q lustre
lustre-2.12.6-1.el7.x86_64

and the client:

aelwell@hpc-admin2:/testfs/pawsey0001/aelwell/dir1$ lfs getstripe .
.
stripe_count:  1 stripe_size:   1048576 pattern:       raid0 stripe_offset: -1 pool:          ost0

aelwell@hpc-admin2:/testfs/pawsey0001/aelwell/dir1$ lfs setstripe -c "" .
aelwell@hpc-admin2:/testfs/pawsey0001/aelwell/dir1$ lfs getstripe .
.
stripe_count:  1 stripe_size:   1048576 pattern:       0 stripe_offset: -1

aelwell@hpc-admin2:/testfs/pawsey0001/aelwell/dir1$

Whamcloud Community JIRA

[LU-14418] lfs setstripe -c "" removes pool allocation