[LU-14755] t-f is to be enhanced to create required number of pools on fs

Wed, 30 Jun 2021 12:52:08 +0000

We are interested in running some tests on fs with the pools. The proposed enhancement allows to create $FS_NPOOLS number of pools containing $FS_POOL_NOSTS number of osts. If $FS_NPOOLS not set the number of pools created is $OSTCOUNT / $FS_POOL_NOSTS. Pools names are $FS_POOL based. Pools are not created if FS_POOL not set.
Examples 1:
FS_POOL=global OSTCOUNT=2
lustre.global0
OST lustre-OST0000_UUID
OST lustre-OST0001_UUID
Example 2:
FS_POOL=global OSTCOUNT=6 FS_POOL_NOSTS=3
lustre.global0
OST lustre-OST0000_UUID
OST lustre-OST0001_UUID
OST lustre-OST0002_UUID
lustre.global1
OST lustre-OST0003_UUID
OST lustre-OST0004_UUID
OST lustre-OST0005_UUID
Example 3:
FS_POOL=p OSTCOUNT=5 KEEP_POOLS=true FS_NPOOLS=7 FS_POOL_NOSTS=3
Pool: lustre.p0
lustre-OST0000_UUID
lustre-OST0001_UUID
lustre-OST0002_UUID
Pool: lustre.p1
lustre-OST0003_UUID
lustre-OST0004_UUID
lustre-OST0000_UUID
Pool: lustre.p2
lustre-OST0001_UUID
lustre-OST0002_UUID
lustre-OST0003_UUID
Pool: lustre.p3
lustre-OST0004_UUID
lustre-OST0000_UUID
lustre-OST0001_UUID
Pool: lustre.p4
lustre-OST0002_UUID
lustre-OST0003_UUID
lustre-OST0004_UUID
Pool: lustre.p5
lustre-OST0000_UUID
lustre-OST0001_UUID
lustre-OST0002_UUID
Pool: lustre.p6
lustre-OST0003_UUID
lustre-OST0004_UUID
lustre-OST0000_UUID

Patch adds the ability to remove all old pools at the start if DELETE_OLD_POOLS set to true (default is false) and the ability keep the new pools not deleted at the end if KEEP_POOLS set to true (default is false).

Whamcloud Community JIRA

[LU-14755] t-f is to be enhanced to create required number of pools on fs