[LU-7984] Group quota does not reflect actual usage

• Type: Bug
• Resolution: Won't Fix
• Priority: Major
• Affects Version/s: Lustre 2.4.2
• Environment: CentOS 6.5, Linux 2.6.32-431.20.3.el6.x86_64; ; Everything running on ZFS, llnl's patches to make ZFS usable (13chaos); ; lz4 compression enable; ; Site is Linkoping University
• Severity: 3
• Assignee: Niu Yawei (Inactive)
• Reporter: Peter Bortas

Description

1. du -hs --apparent-size .
   15T .
2. du -hs .
   9,5T .
3. lfs find . ! -G rcaguess
4. lfs quota -g rcaguess /rfs18
   Disk quotas for group rcaguess (gid 771):
   Filesystem kbytes quota limit grace files quota limit grace
   /rfs18
   375111456* 0 1048576 - 340878 0 0 -

(Filesystem name edited to protect the guilty, but other than that
it's a cut'n'paste.)

There is such a huge difference between usage measured by the quota
system and reality that it's a real operation issue.

Is this resolvable without downtime? Getting to within 10% of real usage is workable, it doesn't need to be perfect.

If not, what is the procedure to do an off-line fsck of the quota in 2.4?