On 03/12/2010 08:55, Pasi Kärkkäinen wrote:
> On Fri, Dec 03, 2010 at 12:45:22PM +0530, Rajagopal Swaminathan wrote:
>> Greetings,
>>
>> On Fri, Dec 3, 2010 at 12:37 AM, Fabian Arrotin
>> <fabian.arro...@arrfab.net>  wrote:
>>> Adam Wead wrote:
>>>> Hi all,
>>>>
>>> Why would so much people use a clusterfs for Virtualization ?
>>> Just use lvm and a logical volumes for your guests.
>> Did you mean CLVM? Where does snapshot stand?
>>
>> bitty outta touch with tech these days...
>>
> You can also use normal LVM over shared iSCSI LUN,
> but you need to be (very) careful with running LVM management commands
> and getting all the nodes (dom0s) to be in sync :)
>
> (Citrix XenServer does this, but there the management toolstack
> takes care of the LVM command execution + state synchronization).
>

Hi,

We use this solution on a san shared storage with Xen and Centos 5 for 3 
years now and i confirm that works fine.
We use live migration without problem.
We "manage" the pool of xen server from standalone server. This server 
assume only one instance of a vm run on the pool.

We plan to migrate with kvm and centos 6.
We thinked about the opportunity to move to a clusetred/shared 
filesystem in order to take benefits of the qcow2 image file format 
(snapshot, diff, etc...)

Googling a lot, it seems there is 2 solution :
   * NFS fileserver
   * ClusterFileSystem on the san (FC,iscsi,etc...)

As anyone have advices/experiences in production with these solutions ?

We have here a good hadware (SAN FC, multipathing, etc....) and the 
clusteringFileSystem seems to be the solution but we search about the 
best/simple solution (easy to manage) and the rhcs seems to be complex.

> -- Pasi
>
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-- 
Frederic Soulier

DSI / Service Système
Université Toulouse 1 Capitole
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31 042 Toulouse Cedex 9
Tel: +33 5 61 63 39 98 Fax: +33 5 61 63 37 98

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