Open Stack

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Hi guys.

at the moment Cinder doesn't allow to attach a volume twice.
I mean i need to build for each application cluster an extra storage
share point (NFS, glusterFS, ...) in the tenant.
Other way is to build a shared storage for all tenants.


Both options are more expensive than needed because:

* Cinder backend servers are highly redundant (maybe 3 times mirror) =>
data will be stored 3 times
* Creating 2 VM's for shared storage in a tenant with NFS + drbd => data
will be stored 6 times 2xNFS x 3xCinder

Better way would be to attach a volume directly on n instances. The
administrator must be solve write conflicts with known possibilities.

I've found two blueprints to this topic:

https://blueprints.launchpad.net/cinder/+spec/shared-volume
https://blueprints.launchpad.net/cinder/+spec/multi-attach-volume

Do anyone know if this will be include in Juno ? I didn't find any on
launchpad for the milestones.


Thanks and Cheers
Heiko

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anynines.com
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