[Users] host raiding two LUN from different external storage

[Shu Ming]

IMHO, host level raid means software raid in one local node.  In order 
to support live migration, we should clone the
software raid in the destination node and make sure all the data are 
flushed into the external storage device before
migration starts.

On 2012-7-29 17:08, Johan Kragsterman wrote:
> Hi!
>
> In some setups, like when you got two datacenters that works like failover sites, you would like to have two external raid controllers(storage devices), one in each datacenter.
>
> You then send two identical LUN's, from each controller, to a cluster, let's say two hosts, for simplicity. What you normally do is to host raid these LUN's in mirror(raid 1), so the hosts write the same to both LUN's, and both controllers.
>
> Question for me here is if I can accomplish this in oVirt management? Because if I can't, it will be a problem, because if I host raid at the host level, then the storage would be local storage for oVirt, wouldn't it? And then I suppose it can't be used for live migration, can it?
>
>   Regrds Johan
> _______________________________________________
> Users mailing list
> Users at ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>


-- 
Shu Ming <shuming at linux.vnet.ibm.com>
IBM China Systems and Technology Laboratory