[Gluster-users] Problems with Postfix-Locks

[Michael Kugele]

Hi,

I'm trying to store the data of a mySQL database in a gluster mount  
point.

The system configuration is:

- Ubuntu 8.04 64 bit
- glusterfs 1.3.12 mainline 2.5 patch 797
- fuse: fuse-2.7.3glfs10 (no kernel module) - module comes with ubuntu


The simliest configuration that brings up errors is the following:

The server and the client are on the same machine - I use two  
processes for the server and the client.

Start the server:
glusterfsd --spec-file=/etc/glusterfs/server.vol -n io-thr

Start the client:
glusterfs --spec-file=/etc/glusterfs/client.vol /storage


I have a symbolic link (var/lib/mysql) that points to /storage/mysql.  
In /storage/mysql all the database files are stored.
When I start the mysql server for the first time everything works just  
fine:

/etc/init.d/mysql start (no errors)

Then I stop the server
/etc/init.d/mysql stop (no errors)

When I try to restart the server - it seems to be locked.

In glusterfs.log the following line appears every second
2008-12-05 01:48:18 E [fuse-bridge.c:2422:fuse_setlk_cbk] glusterfs- 
fuse: 1330: ERR => -1 (11)

In glusterfsd.log the following line appears every second
2008-12-05 01:48:18 E [posix-locks.c:1148:pl_lk] posix-locks:  
returning EAGAIN

After approx. one minute the mysql server is up and running - although  
the start script reported an error (failed to start mysql..)
At the same time the entries in the logfiles stop appearing.


It seams to me that somehow the mysql binary filed have been locked  
and have not been unlocked by either the mysql server nor fuse/ 
glusterfs.

Do you habe any ideas to solve this problem. After googling a while I  
found some similar problems storing VMware files on gluster mounts or  
storing firefox profiles on them.
Attached are my gluster-config files.

Thanks a lot!

Mike



#################
server.vol
#################

#### local brick ####
volume posix
     type storage/posix
     option directory /home/storage
end-volume

volume posix-locks
     type features/posix-locks
     subvolumes posix
end-volume

volume io-thr
     type performance/io-threads
     subvolumes posix-locks
    option thread-count 4
end-volume

#### export local brick ####
volume server
     type protocol/server
     subvolumes io-thr
     option transport-type tcp/server
     option auth.ip.io-thr.allow 192.168.0.*
end-volume

###############
client.vol
###############
volume remote
     type protocol/client
     option transport-type tcp/client
     option remote-host 192.168.0.20
     option remote-subvolume io-thr
     option transport-timeout 3
end-volume