Gluster users - May 2010 - Replication between two separate clusters

Hello -

My company is in need of a clustered NAS solution, mostly for CIFS
fileshares.  We have been considering commercial solutions from Isilon and
NetApp, but I have a feeling I'm not going to get the budget approval for
those products.  I also tend to stay away from closed hardware solutions...
but I digress.  We want to have a production and a DR cluster that replicate
across a WAN.  Is it possible with Gluster to have two separate clusters
replicating volumes that are already mirrored in their independent cluster?
So far it looks like that's what AFR is supposed to do.

Any information or assistance that anyone can provide in clarifying my
understanding of this scenario would be very helpful and much appreciated.

Thank you,

Jeffrey

Hi Jeffery,

What would latency between your two clusters be?

Kamal

Jeffrey Negro wrote:
> Hello -
> 
> My company is in need of a clustered NAS solution, mostly for CIFS
> fileshares.  We have been considering commercial solutions from Isilon and
> NetApp, but I have a feeling I'm not going to get the budget approval
for
> those products.  I also tend to stay away from closed hardware solutions...
> but I digress.  We want to have a production and a DR cluster that
replicate
> across a WAN.  Is it possible with Gluster to have two separate clusters
> replicating volumes that are already mirrored in their independent cluster?
> So far it looks like that's what AFR is supposed to do.
> 
> Any information or assistance that anyone can provide in clarifying my
> understanding of this scenario would be very helpful and much appreciated.
> 
> Thank you,
> 
> Jeffrey
> 
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://gluster.org/cgi-bin/mailman/listinfo/gluster-users

On 05/24/2010 05:39 PM, Jeffrey Negro wrote:
> but I digress.  We want to have a production and a DR cluster that
replicate
> across a WAN.  Is it possible with Gluster to have two separate clusters
Unless your WAN has the latency and throughput of a LAN, you probably 
don't want to be doing this.  Gluster isn't designed (in a general 
sense) for WAN usage.


-- 
Daniel Maher <dma+gluster AT witbe DOT net>

>> Is it possible with Gluster to have two separate clusters
>> replicating volumes that are already mirrored in their independent
cluster?
>> So far it looks like that's what AFR is supposed to do.
This is what I'm setting up as well, we'll have individual, stand
alone, clusters that are synced using a combination of
rsync/ssh/lsyncd/csync2.  For me this is a true DR environment, since
each instance will be storing and serving content at the same time,
and won't be reliant on the other, but as long as they're both up they
will keep each other in sync as to be a mirror.

P

On Mon, May 24, 2010 at 10:39 AM, Jeffrey Negro <jnegro at billtrust.com>
wrote:
> Hello -
>
> My company is in need of a clustered NAS solution, mostly for CIFS
> fileshares. ?We have been considering commercial solutions from Isilon and
> NetApp, but I have a feeling I'm not going to get the budget approval
for
> those products. ?I also tend to stay away from closed hardware solutions...
> but I digress. ?We want to have a production and a DR cluster that
replicate
> across a WAN. ?Is it possible with Gluster to have two separate clusters
> replicating volumes that are already mirrored in their independent cluster?
> So far it looks like that's what AFR is supposed to do.
>
> Any information or assistance that anyone can provide in clarifying my
> understanding of this scenario would be very helpful and much appreciated.
>
> Thank you,
>
> Jeffrey
>
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://gluster.org/cgi-bin/mailman/listinfo/gluster-users
>
>


-- 
http://philcryer.com

Jeffrey - 
AFR has been deprecated, we use "cluster/replicate" now. Replicate
works by implementing "Mirror on Write". If you are using the
GlusterFS client and your volume is mirrored the client actually writes to both
nodes at the same time so the replication is synchronous.
Unfortunately replicate is not very tolerant of queuing and isn't suggested
for WAN replication unless you have a lot of very low latency bandwidth. We have
an async solution in the roadmap, please give me a call if you want some more
details.




Thanks, 

Craig 

-- 
Craig Carl 













Sales Engineer; Gluster, Inc. 
Cell - ( 408) 829-9953 (California, USA) 
Office - ( 408) 770-1884 
Gtalk - craig.carl at gmail.com 
Twitter - @gluster 
Installing Gluster Storage Platform, the movie! 


From: "Jeffrey Negro" <jnegro at billtrust.com> 
To: phil at cryer.us 
Cc: gluster-users at gluster.org 
Sent: Tuesday, May 25, 2010 7:01:39 AM 
Subject: Re: [Gluster-users] Replication between two separate clusters 

How close to realtime replication is your solution? and if anyone else can 
tell me exactly what AFR is supposed to do, it would be much appreciated. 


Jeffrey Negro, Network Engineer 
Billtrust - Improving Your Billing, Improving Your Business 
www.billtrust.com 
609.235.1010 x137 



On Tue, May 25, 2010 at 9:39 AM, phil cryer <phil at cryer.us> wrote: 
> >> Is it possible with Gluster to have two separate clusters 
> >> replicating volumes that are already mirrored in their independent
> cluster? 
> >> So far it looks like that's what AFR is supposed to do. 
> 
> This is what I'm setting up as well, we'll have individual, stand 
> alone, clusters that are synced using a combination of 
> rsync/ssh/lsyncd/csync2. For me this is a true DR environment, since 
> each instance will be storing and serving content at the same time, 
> and won't be reliant on the other, but as long as they're both up
they
> will keep each other in sync as to be a mirror. 
> 
> P 
> 
> On Mon, May 24, 2010 at 10:39 AM, Jeffrey Negro <jnegro at
billtrust.com>
> wrote: 
> > Hello - 
> > 
> > My company is in need of a clustered NAS solution, mostly for CIFS 
> > fileshares. We have been considering commercial solutions from Isilon 
> and 
> > NetApp, but I have a feeling I'm not going to get the budget
approval for
> > those products. I also tend to stay away from closed hardware 
> solutions... 
> > but I digress. We want to have a production and a DR cluster that 
> replicate 
> > across a WAN. Is it possible with Gluster to have two separate
clusters
> > replicating volumes that are already mirrored in their independent 
> cluster? 
> > So far it looks like that's what AFR is supposed to do. 
> > 
> > Any information or assistance that anyone can provide in clarifying my
> > understanding of this scenario would be very helpful and much 
> appreciated. 
> > 
> > Thank you, 
> > 
> > Jeffrey 
> > 
> > _______________________________________________ 
> > Gluster-users mailing list 
> > Gluster-users at gluster.org 
> > http://gluster.org/cgi-bin/mailman/listinfo/gluster-users 
> > 
> > 
> 
> 
> 
> -- 
> http://philcryer.com 
> 
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