[Gluster-devel] combining AFR and cluster/unify

[Krishna Srinivas]

On 3/12/07, Pooya Woodcock <pooya at packetcloud.net> wrote:
> Hi Krishna,
>
> I'll clarify a bit by saying the main purpose of having cluster/unify
> plus AFR is to have an expandable grid file system but have
> redundancy on it too. I don't mind having to restart the daemons or
> remount the glusterfs volume.
>
> I have the funds to build a 20 node glusterfs cluster and I was
> thinking that 20 machines each with 2x750Gig SATA drives in cluster/
> unify would yield around 25-30 or so TB of storage. An EMC san of
> comparable size will cost us way more than this grid. If you add the
> AFR portion, and say replicate *:4 , that's like saying you can take
> down 3 servers and still be guaranteed to have a node in the cluster
> with the file you're looking for.
>
> Please let me know if I'm wrong, and with that in mind, can you
> provide an example of how to do this on a cluster of 4 servers to
> start ?
>

Hi Pooya,

Your idea is correct. For the example of how to do it, have you gone
through our wiki documentation?
http://www.gluster.org/docs/index.php/GlusterFS
Let us know if you need any help.

Krishna


> Thanks, and awesome project!
> Pooya
>
> On Mar 11, 2007, at 1:24 PM, Krishna Srinivas wrote:
>
> > Pooya,
> >
> > If you change the client.vol you have to restart the glusterfs.
> > If you change the server.vol you have to restart the glusterfsd.
> >
> > It is possible not to restart glusterfs but still grow the
> > glusterfs volume.
> > i.e by using an extra glusterfsd which does unify which communicates
> > with the glusterfs. you can change the configs for this glusterfsd
> > and restart it. However glusterfs will not work properly till you
> > start
> > this glusterfsd process, but you dont have to restart the glusterfs
> > process.
> >
> > Let me know if I need to explain by example.
> >
> > Krishna
> >
> > On 3/10/07, Pooya Woodcock <pooya at packetcloud.net> wrote:
> >>
> >> I just had a chance to experiment with GlusterFS this evening and one
> >> question came up. I am wondering if it is possible to combine types
> >> cluster/unify and AFR such that you have a mounted glusterfs volume
> >> that grows in size and also has *:2 on its files, for example.
> >>
> >> Thanks,
> >>
> >> Pooya
> >>
> >>
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>
>
>
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