[LU-9424] ‘lfs getstripe --component-count’ return nothing for non-composite files

• Type: Technical task
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: Lustre 2.10.0
• Fix Version/s: Lustre 2.10.0
• Labels: pfl
• Assignee: Niu Yawei (Inactive)
• Reporter: James Nunez

Description

I’ve created several composite and non-composite files:

# touch /lustre/scratch/nocomp
# lfs setstripe -E 1M -E 2M -E 3M /lustre/scratch/threecompfile
# lfs setstripe -E 3M /lustre/scratch/onec
# lfs setstripe -E 1m -E 4M /lustre/scratch/twoc

For non-composite (non-PFL) files, I thought the component count would be 0 or 1, but that’s not the case. Using ‘lfs find –component-count’, I know that the component count for the non-composite file, nocomp, is not 0 and not 1:

# lfs getstripe --component-count /lustre/scratch/nocomp 
# lfs getstripe --component-count /lustre/scratch/onec 
1
# lfs getstripe --component-count /lustre/scratch/twoc 
2
# lfs getstripe --component-count /lustre/scratch/threecompfile 
3

# lfs find --component-count 0 /lustre/scratch
# lfs find --component-count 1 /lustre/scratch
/lustre/scratch/onec

# lfs find ! --component-count 0 /lustre/scratch
/lustre/scratch
/lustre/scratch/twoc
/lustre/scratch/onec
/lustre/scratch/nocomp
/lustre/scratch/threecompfile

# lfs find ! --component-count 1 /lustre/scratch
/lustre/scratch
/lustre/scratch/twoc
/lustre/scratch/nocomp
/lustre/scratch/threecompfile

It seems like non-composite files should have a count of 1 or, possibly, 0.

Issue Links

• is related to: LU-9362 PFL: Files with multiple components should not return multiple values for ‘lfs getstripe’
• is related to: LU-9349 PFL known issues tracking ticket