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On 10/28/2013 09:35 AM, Ray Sun wrote:
> Daniel,
> Thanks for you response. But I am still confusing about use a iscsi
> device, if I want to use it as shared storage, first I need to attach to
> a node as a block storage, then I mount it to other compute nodes using
> NFS. The problem is that this will make a big lost on performance.
> Currently nova already support to create a new VM on ceph RBD, but why
> we can not create it on a block storage?

ceph and NFS are both designed for simultaneous access by multiple clients.

iSCSI is not.

Chris