[Gluster-users] Scaling Gluster

José Celano jcelano at iqingenieros.com
Mon May 23 17:05:42 UTC 2011

Hi Tony:

On Mon, May 23, 2011 at 4:55 PM, Anthony J. Biacco <
abiacco at formatdynamics.com> wrote:

> I think i read somewhere the server in the mount string is only used to
> retrieve the cluster config. So as long as that server is up at time of
> mount, you're fine.

Yes, It is in the offcial documentation.
I am trying to avoid that. My final objetive is high availability.

> If the server goes down after mount, it doesnt matter as the cluster config
> on the mounting servers knows about all gluster servers.

Yes, there is no problem after mounting becasuse I use replication. The
problem is in new mountig processes
after the seleted "master gluster server" crashes.

> Somebody correct me if i'm wrong.
> Personally, i copy the cluster config to all my mounting servers and use
> that file in the mount command instead of a gluster server hostname.

Yes. That is ok, but I am finding an automatic way in case I make an
auto-scalable Gluster deployment.
If something change in Gluster like the number of servers (I could add more
servers later) then I would have
to copy  the new volumen info to my Apache Rol Amazon Image, and this can
not be done automatically.
Other way could be doing a script to load that file from S3 but I would have
to copy the new volume info file
to S3 every time It changes, and I don´t know how this can be done because I
don´t know how monitoring
and catch Gluster volumes changes.

> -Tony
> -----Original Message-----
> From: Joshua Baker-LePain <jlb17 at duke.edu>
> Sent: May 23, 2011 9:16 AM
> To: José Celano <jcelano at iqingenieros.com>
> Cc: gluster-users at gluster.org <gluster-users at gluster.org>
> Subject: Re: [Gluster-users] Scaling Gluster
> On Thu, 19 May 2011 at 12:40am, José Celano wrote
> > I have 2 replicated servers and several Apache servers that mount the
> same
> > volume.
> > When I mount a Gluster Volumen from one of the Apache servers
> >
> > mount.glusterfs
> >
> ip-XX-XXX-XXX-XXX.eu-west-1.compute.internal:/dab578f4-06fa-4584-ac1d-c6ef14e6d0cf
> > /mnt/glusterfs
> > how could I obtain high availability if that server die?
> Use ucarp to share a virtual IP address between the Gluster servers, and
> mount using that IP address.
> --
> Joshua Baker-LePain
> QB3 Shared Cluster Sysadmin
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