gluster-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Gluster-devel] Need inputs for fixing 866908


From: Vijay Bellur
Subject: Re: [Gluster-devel] Need inputs for fixing 866908
Date: Thu, 13 Dec 2012 11:23:27 +0530
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120828 Thunderbird/15.0

On 12/12/2012 02:09 PM, Pranith Kumar Karampuri wrote:
hi,
   https://bugzilla.redhat.com/show_bug.cgi?id=866908.
gluster volume heal <vol_name> info" command outputs entries which are in ".glusterfs" 
and ".landfill" directory

Reason for the issue:
Whenever a brick is restarted and self-heal has to remove a directory 'dir' it sets a 
flag indicating in rmdir fop that it is 'rm -rf'. The 'dir' is moved to 
'.glusterfs/landfill' by posix because of the flags in rmdir fop, Janitor thread 
removes it asynchronously. gfid-handles exists for 'dir' and files under 'dir' until 
the janitor thread deletes them from landfill. Janitor thread is run every 10 
minutes. Self-heald depends on gfid-handle presence to determine that a file exists 
in the filesystem. Because of this behaviour, stale entries show up in the output of 
'gluster volume heal <volname> info'. The issue is transient, after 10 minutes 
the stale entries won't show up in the output. One way to fix it is by waking up 
Janitor thread as soon as an rmdir fop comes with a special flag indicating that rm 
-rf needs to happen inside landfill. We can even close the issue documenting the 
behaviour as known issue. Let me know your inputs.

The problem as reported seems to be with self-heal-daemon informing the CLI that there are entries to be healed and some of them not being relevant as they are part of .landfill. I cannot think of a foolproof solution for this right away as a rm -rf might happen after self-heal-daemon has sent out a response that contains entries needing self-heal. I think a better way out here is to educate users about entries seen from .landfill in the output of heal * commands as transient and not being relevant for self-healing.

-Vijay




reply via email to

[Prev in Thread] Current Thread [Next in Thread]