← Back to team overview

openstack team mailing list archive

Re: Shared Storage with cinder ?

 

On Fri, Jul 5, 2013 at 10:31 AM, Clint Byrum <clint@xxxxxxxxxx> wrote:

> Excerpts from Heiko Krämer's message of 2013-07-05 09:24:03 -0700:
> > Heyho guys,
> >
> > I'm searching for a solution to share storage over more then one
> instance.
> >
> > Normally you attach a block device with cinder directly via iscsi or
> > glusterfs or whatever to one instance and that's it. Multi attachments
> > are not present.
> >
> >
> > Use case:
> >
> > I've an application on 4 application instances and a database instance.
> > Now you have static file like images, movies, css ... but this files
> > should be available on each application instance.
>
> This use case is best served by object storage like swift and CEPH's
> radosgw.
>
> > Now you need to fire up an "storage" instance and attach a volume. After
> > that you can with nfs or what ever share your stuff to the application
> > instances but i think this is a very big ressource overhead for small
> > projects. You need a instance only to share your data on each project
> > and this n times :(
> >
>
> If you only have one small app with 5 instances, running your own
> OpenStack is quite overkill.  However, I suspect you have OpenStack so
> you can have many small apps with a few instances, and thus you'll find
> many of them can benefit from a good solid object store.
>
> _______________________________________________
> Mailing list: https://launchpad.net/~openstack
> Post to     : openstack@xxxxxxxxxxxxxxxxxxx
> Unsubscribe : https://launchpad.net/~openstack
> More help   : https://help.launchpad.net/ListHelp
>

Cinder does not offer multi-attach currently, we're hoping to change that
for the Havana release:
https://blueprints.launchpad.net/cinder/+spec/shared-volume

References