Ceph

Context¶

Discussed on CDM_06-APR-2016 (http://tracker.ceph.com/projects/ceph/wiki/CDM_06-APR-2016). Building block for deduplication.

Idea¶

Create a special pool type that only stores reference counted, content addressed, write-once objects.

Later features like tieringv2 or deduplicating clients would use this pool to (1) store objects and (2) as a distributed fingerprint index.

Implementation¶

• Object classes
• Limit access and operations to the pool to certain object classes in order to have immutable objects and prevent collisions with non-CAS objects
• Pluggable fingerprints (content addresses)
• Tests and tools