Gluster users - Jul 2009 - GlusterFS & XenServer Baremetal

Hello,

What is for you the best GlusterFS scenario in using XenServer (i'm not
talking about Xen on a linux but XenServer baremetal) for a web farm
(Apache-Tomcat) ? I were thinking of using ZFS as the filesystem for the
different nodes.

The objectives/needs :

* A storage cluster with the capacity equal to at least 1 node(assuming all
nodes are the same).
* being able to lose/take down any one brick in the cluster at any time
without a loss of data.
* more than the throughput of a single server, if not in overall speed, then
in width.
* being able to add more bricks in and have the expectation of increased
storage capacity and throughput.
* present the storage as a single entity

I saw the GlusterFS for Archlinux so maybe an interesting solution for
Xenserver as it uses archlinux but by also probably loosing the AFS use and
its advantages.

On Sat, 18 Jul 2009, Alexandre Emeriau wrote:
> Hello,
>
> What is for you the best GlusterFS scenario in using XenServer (i'm not
> talking about Xen on a linux but XenServer baremetal) for a web farm
> (Apache-Tomcat) ? I were thinking of using ZFS as the filesystem for the
> different nodes.
>
> The objectives/needs :
>
> * A storage cluster with the capacity equal to at least 1 node(assuming all
> nodes are the same).
> * being able to lose/take down any one brick in the cluster at any time
> without a loss of data.
> * more than the throughput of a single server, if not in overall speed,
then
> in width.
> * being able to add more bricks in and have the expectation of increased
> storage capacity and throughput.
> * present the storage as a single entity
This is all doable, the only downside is that last time I tested even with 
raw RAID 6 IO of 400 meg, I was only able to get 25 MB/s with 
--disable-direct-io-mode.
><>
Nathan Stratton                                CTO, BlinkMind, Inc.
nathan at robotics.net                         nathan at blinkmind.com
http://www.robotics.net                        http://www.blinkmind.com