[Gluster-users] SPOF question

[Roberto Lucignani]

Hi all,

I installed two Gluster Storage Platorm 3.0.4 on two servers node01 e
node02.

I created a volume called gluster01 than I mounted it on a Debian box in
this way:

 

mount -t glusterfs /etc/glusterfs/gluster01-tcp.vol /mnt/gluster01/

 

the gluster01-tcp.vol is the following:

 

 

volume 192.168.0.200-1

    type protocol/client

    option transport-type tcp

    option remote-host 192.168.0.200

    option transport.socket.nodelay on

    option transport.remote-port 10012

    option remote-subvolume brick1

end-volume

 

volume 192.168.0.200-2

    type protocol/client

    option transport-type tcp

    option remote-host 192.168.0.200

    option transport.socket.nodelay on

    option transport.remote-port 10012

    option remote-subvolume brick2

end-volume

 

volume 192.168.0.201-1

    type protocol/client

    option transport-type tcp

    option remote-host 192.168.0.201

    option transport.socket.nodelay on

    option transport.remote-port 10012

    option remote-subvolume brick1

end-volume

 

volume 192.168.0.201-2

    type protocol/client

    option transport-type tcp

    option remote-host 192.168.0.201

    option transport.socket.nodelay on

    option transport.remote-port 10012

    option remote-subvolume brick2

end-volume

 

volume mirror-0

    type cluster/replicate

    subvolumes 192.168.0.201-1 192.168.0.200-1

end-volume

 

volume mirror-1

    type cluster/replicate

    subvolumes 192.168.0.201-2 192.168.0.200-2

end-volume

 

volume distribute

    type cluster/distribute

    subvolumes mirror-0 mirror-1

end-volume

 

volume readahead

    type performance/read-ahead

    option page-count 4

    subvolumes distribute

end-volume

 

volume iocache

    type performance/io-cache

    option cache-size `echo $(( $(grep 'MemTotal' /proc/meminfo | sed
's/[^0-9]//g') / 5120 ))`MB

    option cache-timeout 1

    subvolumes readahead

end-volume

 

volume quickread

    type performance/quick-read

    option cache-timeout 1

    option max-file-size 64kB

    subvolumes iocache

end-volume

 

volume writebehind

    type performance/write-behind

    option cache-size 4MB

    subvolumes quickread

end-volume

 

volume statprefetch

    type performance/stat-prefetch

    subvolumes writebehind

end-volume

 

 

 

all works fine and smooth, I can write and read on that volume without any
problem.

The problem is when the node01 is unavailable, I can't access the volume via
mount on the Debian box. This doesn't happen if it is the node02 to be
unavailable.

I expected the same behavior in the two cases, in this way the node01
represents an SPOF, am I wrong ? am I missing something the configuration ?

 

Tnx in advance

Rpberto