[Gluster-devel] Trying to run a mailcluster

[Guido Smit]

Hi all,

I'm trying to set up a mailcluster for a while now, using glusterfs as 
filesystem. I've installed fuse2.7.2glfs8, glusterfs-tla662 on Centos5

As for now, running on 3 servers. 1 configured as dedicated server, 1 as 
client only, 1 as server and client.

Normal file operations are doing great, speed can be a little faster, 
but overall I'm happy with it. When starting Dovecot, the following 
error shows up (1st line repeats for every client that logs in):

2008-02-15 14:27:43 E [afr.c:3730:afr_lk_cbk] afr: 
(path=/comlog.nl/xxxxxxxxx/Maildir/dovecot.index.log child=pop2-mail) 
op_ret=-1 op_errno=77
2008-02-15 14:30:52 C [client-protocol.c:222:call_bail] pop2-mail-ns: 
bailing transport
2008-02-15 14:30:52 C [client-protocol.c:222:call_bail] pop2-mail: 
bailing transport
2008-02-15 14:32:40 C [client-protocol.c:222:call_bail] pop2-mail-ns: 
bailing transport

Everything stalls, no ls, no df nothing. I have to kill all dovecot 
processes, kill glusterfs and glusterfsd
I've tried with an empty namespace on both servers, but it didn't 
resolve this.

I really need some advise here.

My configs:
glusterfs-server.vol

volume pop1-mail-ns
       type storage/posix
       option directory /home/namespace
end-volume

volume pop1-mail-ds
       type storage/posix
       option directory /home/export
end-volume

volume pop1-mail
       type features/posix-locks
       option mandatory on                     # enables mandatory 
locking on all files
       subvolumes pop1-mail-ds
end-volume

volume pop2-mail
       type protocol/client
       option transport-type tcp/client
       option remote-host 62.59.252.42
       option remote-subvolume pop2-mail-ds
end-volume

volume pop2-mail-ns
       type protocol/client
       option transport-type tcp/client
       option remote-host 62.59.252.42
       option remote-subvolume pop2-mail-ns
end-volume

volume afr
       type cluster/afr
       subvolumes pop1-mail pop2-mail
end-volume

volume afr-ns
      type cluster/afr
      subvolumes pop1-mail-ns pop2-mail-ns
end-volume

volume unify
       type cluster/unify
       option namespace afr-ns
       option scheduler rr
       subvolumes afr
end-volume

volume mail-ds-readahead
       type performance/read-ahead
       option page-size 128kB                  # 256KB is the default 
option
       option page-count 4                     # 2 is default option
       option force-atime-update off           # default is off
       subvolumes unify
end-volume

volume mail-ds-writebehind
       type performance/write-behind
       option aggregate-size 1MB               # default is 0bytes
       option flush-behind on                  # default is 'off'
       subvolumes mail-ds-readahead
end-volume

volume mail-ds
       type performance/io-threads
       option thread-count 4                   # deault is 1
       option cache-size 32MB                  #64MB
       subvolumes mail-ds-writebehind
end-volume

volume server
       type protocol/server
       option transport-type tcp/server
       subvolumes pop1-mail-ds pop1-mail-ns mail-ds
       option auth.ip.pop1-mail-ds.allow 62.59.252.*,127.0.0.1
       option auth.ip.pop1-mail-ns.allow 62.59.252.*,127.0.0.1
       option auth.ip.mail-ds.allow 62.59.252.*,127.0.0.1
end-volume


glusterfs-client.vol:

volume mailspool
       type protocol/client
       option transport-type tcp/client
       option remote-host 62.59.252.41
       option remote-subvolume mail-ds
end-volume

volume readahead
       type performance/read-ahead
       option page-size 128kB
       option page-count 16
       option force-atime-update off # default is off
       subvolumes mailspool
end-volume

volume writeback
       type performance/write-behind
       option aggregate-size 1MB
       option flush-behind on      # default is 'off'
       subvolumes readahead
end-volume

volume iothreads
       type performance/io-threads
       option thread-count 4  # deault is 1
       option cache-size 32MB #64MB
       subvolumes writeback
end-volume

volume io-cache
       type performance/io-cache
       option cache-size 128MB             # default is 32MB
       option page-size 1MB               #128KB is default option
       option priority *:0 # default is '*:0'
       option force-revalidate-timeout 2  # default is 1
       subvolumes iothreads
end-volume



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