Re: [Xen-users] lustre clustre file system and xen 3

[Karsten Nielsen <karsten-xen@xxxxxxxxxx>]

Christopher G. Stach II wrote:
> Karsten Nielsen wrote:
> > The reason fore having a file backend is that I will be able to live
> > imigrate domU's from one server to the next in case of hardware failor
> > or extremly high load on one of the physical servers.
> That's not a valid reason. :)  There's no requirement to use files for
> that.  Use NBD and GFS or DRBD.
Sorry my bad. I ment shared storage for live imigration. Not a file 
backend. I see the mix up. And my bad english.... :(
My picture should have look like this. Sorry!

---------  ---------
| app 1 |  | app 2 |
---------  ---------
    \        /
     \      /
      \    /
  ----------------
 | shared storage |
  ----------------

I would like to have a very flexible setup. Where I can add application 
servers as well as more shared storage ( my storage i a server with sata 
raid 5 up to 4TB)
should I share my storage DRBD and that way be able to add an other 
shared storage device at later point for HA and on my application 
servers use GFS or OCFS2 ?
I am testing with Lustre on my shared storage at the moment.

> > If I understand you correct you suggest that I make a lot of storage
> > avaliable on both application servers and syncronize data with DRBD ?
> >
> > But if I add a 3. application server that setup does not work unless i
> > add storage space on all three application servers and implement that in
> > the DRBD ?
> DRBD is better for HA.  Do you want to load balance or just failover?
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users