[LU-3943] incorrect inode count in lfs df -i

• Type: Bug
• Resolution: Not a Bug
• Priority: Minor
• Fix Version/s: Lustre 2.6.0
• Affects Version/s: Lustre 1.8.7
• Severity: 3
• Assignee: Jian Yu
• Reporter: Kit Westneat (Inactive)

Description

SFU recently reformatted their MDT to have more inodes, using -i. We did a file-level backup and restore. Everything looks good except client-side df and lfs df are both reporting the old inode count:

client1# lfs df -i
UUID Inodes IUsed IFree IUse% Mounted on
lfs_scra-MDT0000_UUID 121693414 98842604 22850810 81% /global/scratch[MDT:0]
lfs_scra-OST0000_UUID 119472128 21603481 97868647 18% /global/scratch[OST:0]
...

mds# df -i /dev/vg_lfs_scra/mdt
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/vg_lfs_scra/mdt 251658240 98842604 152815636 40% /lustre/lfs_scra/mdt

mds# dumpe2fs -h /dev/vg_lfs_scra/mdt
...
Inode count: 251658240
Block count: 62914560
Reserved block count: 3145728
Free blocks: 22850811
Free inodes: 152815677
...

I'm pretty puzzled by this. Is there something I'm doing wrong? Any other information I can get you?