[LU-9324] sanity-pfl test 10 needs to reset the file system default layout

• Type: Technical task
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.11.0
• Affects Version/s: Lustre 2.10.0
• Labels: pfl test
• Assignee: Zhenyu Xu
• Reporter: James Nunez (Inactive)

Description

sanity-pfl test_10 sets the default layout on $MOUNT and does not return the file system to the original state. For users running the Lustre test suites as a sanity check on their file systems, this is an unexpected side effect. We should return the file system to the state it was in before running sanity-pfl.

From sanity-pfl, the following code in test 10 sets the default layout:

        $LFS setstripe -d $MOUNT || error "clear root layout"

	# set root composite layout                                             
	$LFS setstripe -E 2M -c 1 -S 1M -E 16M -c2 -S 2M \
		-E -1 -c 4 -S 4M $MOUNT ||
                error "Set root layout failed"

Here's what the file system layout looks like before and after sanity-pfl test 10:

# lfs getstripe /lustre/scratch
/lustre/scratch
stripe_count:  1 stripe_size:   1048576 stripe_offset: -1
[root@eagle-48vm6 tests]# ./auster -k -v sanity-pfl --only 10
Started at Wed Apr 12 14:54:34 UTC 2017
…
./auster: completed with rc 0
[root@eagle-48vm6 tests]# lfs getstripe /lustre/scratch
/lustre/scratch
  lcm_layout_gen:  0
  lcm_entry_count: 3
    lcme_id:             N/A
    lcme_flags:          0
    lcme_extent.e_start: 0
    lcme_extent.e_end:   2097152
      stripe_count:  1       stripe_size:   1048576       stripe_offset: -1
    lcme_id:             N/A
    lcme_flags:          0
    lcme_extent.e_start: 2097152
    lcme_extent.e_end:   16777216
      stripe_count:  2       stripe_size:   2097152       stripe_offset: -1
    lcme_id:             N/A
    lcme_flags:          0
    lcme_extent.e_start: 16777216
    lcme_extent.e_end:   EOF
      stripe_count:  4       stripe_size:   4194304       stripe_offset: -1

Issue Links

• is related to: LU-10353 parallel-scale* tests fail with ‘No space left on device’
• is related to: LU-7723 few tests in sanity.sh fail because of STRIPES_PER_OBJ=-1
• is related to: LU-9897 Tracking of lustre library improvements.
• is related to: LU-9486 sanity test 27D failed with 'llapi_layout_test failed'
• is related to: LU-11918 Allow setting default file layout on root directory at mkfs time
• is related to: LU-8998 Progressive File Layout (PFL)