[LU-15707] Unable to create file without a pool with a pool define on the parent or on the fs root.

Related — Mon, 13 Nov 2023 11:56:04 +0000

The user need to have a way to force file creation without a pool to select specific OSTs (lfs setstripe --ost) or to use all the OST for the stripe's selections.
The patch https://review.whamcloud.com/41815 remove the pool from the layout when a ostlist is supplied (lfs setstripe --ost) , but this behavior will be changed with ~~LU-15658~~.

Reproducer:

# lfs setstripe -p ost0 testdir/
# lfs setstripe -p ''  testdir/testfile              
# lfs setstripe -p none  testdir/testfile2           
# lfs setstripe -c2  testdir/testfile3
# lfs getstripe -p testdir/* 
ost0                                             
                                                 
ost0                                             
                                                 
ost0

On 2.12.8:

# lfs setstripe -p ost0 testdir/
# lfs setstripe --ost 1,0  testdir/testfile1              
lfs setstripe: setstripe error for 'testdir/testfile1': Invalid argument
# lfs setstripe --ost 0,1  testdir/testfile2  
# lfs getstripe -p testdir/testfile2
ost0

EINVAL is returned because MDT only check if the first OST index is in the pool (see the ~~LU-14480~~).

Whamcloud Community JIRA

[LU-15707] Unable to create file without a pool with a pool define on the parent or on the fs root.