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

[Krishna Srinivas]

But this setup will be vulnerable to race conditions, for example
if server1 and server2 try to create file with same name in the
same path.

On 3/4/07, Krishna Srinivas <krishna at zresearch.com> wrote:
> 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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> >
>