[LU-1512] OI leaks

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.3.0, Lustre 2.4.0
• Affects Version/s: Lustre 2.3.0, Lustre 2.1.3, Lustre 2.1.6
• Labels: mq213 mq313
• Environment: b2_1 g636ddbf
• Severity: 3
• Assignee: nasf (Inactive)
• Reporter: Brian Murrell (Inactive)

Description

I have a smallish filesystem to which I only allocated a 5GB MDT since the overall dataset was always intended to be very small. This filesystem is simply being used to add and remove files in a loop with something along the lines of:

while true; do
    cp -a /lib /mnt/lustre/foo
    rm -rf /mnt/lustre/foo
done

It seems in doing this I have filled up my MDT with an "oi.16" file that is now 94% of the space of the MDT:

# stat /mnt/lustre/mdt/oi.16 
  File: `/mnt/lustre/mdt/oi.16'
  Size: 4733702144	Blocks: 9254568    IO Block: 4096   regular file
Device: fd05h/64773d	Inode: 13          Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2012-05-27 11:55:00.175323551 +0000
Modify: 2012-05-27 11:55:00.175323551 +0000
Change: 2012-05-27 11:55:00.175323551 +0000

# df -k /mnt/lustre/mdt/
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/LustreVG-mdt0
                       5240128   5240128         0 100% /mnt/lustre/mdt

# ls -ls /mnt/lustre/mdt/oi.16 
4627284 -rw-r--r-- 1 root root 4733702144 May 27 11:55 /mnt/lustre/mdt/oi.16

It seems the OI is leaking and not being reaped when files are removed.