[openstack-dev] Announcing Ekko -- Scalable block-based backup for OpenStack

Preston L. Bannister preston at bannister.us
Sun Jan 31 00:01:04 UTC 2016

Seems to me there are three threads here.

The Freezer folk were given a task, and did the best possible to support
backup given what OpenStack allowed. To date, OpenStack is simply not very
good at supporting backup as a service. (Apologies to the Freezer folk if I

The patches (finally) landing in QEMU in support of incremental backup
could be the basis for efficient backup services in OpenStack. This is all
fairly high risk, in the short term. The bits that landed in QEMU 2.4 may
not be sufficient (there are more QEMU patches trying to land). When put
into production, we may find faults. For use in OpenStack, we may need
changes in libvirt, and/or in Nova. (Or *maybe* not if usage for backup
proves orthogonal.)  The only way to work out the prior is to start. The
timeline could be months or years.

There is a need for a common API for backup as a service in the cloud.
Something more than imitating AWS. Allow some room for vendors with
differing approach.

I see the above as not competing, but aspects of the same problem.

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