[Gluster-users] NFS mounts with glusterd on localhost - reliable or not?

[Tomasz Chmielewski]

Hi,

are NFS mounts made on a single server (i.e. where glusterd is running) 
supposed to be stable (with gluster 3.2.6)?


I'm using the following line in /etc/fstab:


localhost:/sites /var/ftp/sites nfs _netdev,mountproto=tcp,nfsvers=3,bg 0 0


The problem is, after some time (~1-6 hours), I'm no longer able to 
access this mount.

dmesg says:

[49609.832274] nfs: server localhost not responding, still trying
[49910.639351] nfs: server localhost not responding, still trying
[50211.446433] nfs: server localhost not responding, still trying


What's worse, whenever this happens, *all* other servers in the cluster 
(it's a 10-server distributed volume) will destabilise - their load 
average will grow, and eventually their gluster mount becomes 
unresponsive, too (other servers use normal gluster mounts).

At this point, I have to kill all gluster processes, start glusterd 
again, mount (on servers using gluster mount).


Is it expected behaviour with gluster and NFS mounts on localhost? Can 
it be caused by some kind of deadlock? Any workarounds?



-- 
Tomasz Chmielewski
http://www.ptraveler.com