[Gluster-devel] GlusterFS 1.3.0-pre2.2: AFR setup

[Krishna Srinivas]

Hi Gerry,

If there are four machines: server1 server2 server3 server4

server1 server spec file:
volume brick
	type storage/posix
	option directory /var/www
end-volume

### Add network serving capabilities to the "brick" volume
volume server
	type protocol/server
	option transport-type tcp/server
	option listen-port 6996
	subvolumes brick
	option auth.ip.brick.allow *
end-volume

server1 client spec file will be like this:
volume client1
	type storage/posix
        option directory /var/www
end-volume

volume client2
	type protocol/client
	option transport-type tcp/client
	option remote-host server2
	option remote-port 6996
	option remote-subvolume brick
end-volume

volume client3
	type protocol/client
	option transport-type tcp/client
	option remote-host server3
	option remote-port 6996
	option remote-subvolume brick
end-volume

volume client4
	type protocol/client
	option transport-type tcp/client
	option remote-host server4
	option remote-port 6996
	option remote-subvolume brick
end-volume

volume afr
	type cluster/afr
	subvolumes client1 client2 client3 client4
	option replicate *:4
end-volume

here all read() operations happen on client1 as it is mentioned
first in the list of subvolumes. so it serves your purpose.

Let us know if you need more help.

On 3/4/07, Gerry Reno <greno at verizon.net> wrote:
> Krishna Srinivas wrote:
> > Hi Gerry,
> >
> > Could not really understand the requirements for your setup.
> >
> > Have you gone through the documentation?
> > http://www.gluster.org/docs/index.php/GlusterFS_User_Guide#Automatic_File_Replication_Translator
> >
> >
> Hi Krishna,
>   Yes, this is the document I'm using.  Let me describe in plain english
> what I need.  I want to be able to setup a webserver farm using a
> clustered filesystem.  In this way /var/www will be the same exact copy
> on all nodes.  What is written to /var/www on any node should be
> replicated to the local storage brick on all the other nodes.  This will
> simplify synchronizing all the webserver files and provide good
> performance because the webserver files will be local to each node.
>   Can AFR do this?  Because in reality wouldn't all the nodes be both
> master nodes and mirror nodes.  If not AFR, then how can I do this?
>
> Thanks,
> Gerry
>
>
>
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