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This commit adds codes of RGWDedup and RGWDedupManager. RGWDedup is a function that enables deduplication into RGW layer. - RGWDedup: an instance that controlls RGWDedupManager during its lifecycle - DedupManager: a thread that manages whole deduplication routine Signed-off-by: Sungmin Lee <sung_min.lee@samsung.com>
RGWFPManager is a component of RGWDedup that stores chunks information. Signed-off-by: daegon.yang <daegon.yang@samsung.com> Signed-off-by: Sungmin Lee <sung_min.lee@samsung.com>
RGWDedupWorker does chunking RADOS objects and stores chunks' fingerprints in FPManager. If the fingerprint is already stored in the FPManager, chunk dedup is performed. This commit implements RGWDedupWorker's dedup logic. Signed-off-by: daegon.yang <daegon.yang@samsung.com> Signed-off-by: Sungmin Lee <sung_min.lee@samsung.com>
RGWChunkScrubWorker finds reference mismatches between metadata objects and chunk objects and fix them. It compares all the chunk objects’ references and referenced metadata objects’ chunk information. During scrub processing, if any reference mismatch is found, the workers fix it. Signed-off-by: Sungmin Lee <sung_min.lee@samsung.com>
Signed-off-by: daegon.yang <daegon.yang@samsung.com>
In an environment where multiple-RGW daemons are running in a zone, RGWDedup also supports to operate in a scalable manner. Signed-off-by: Sungmin Lee <sung_min.lee@samsung.com> Signed-off-by: daegon.yang <daegon.yang@samsung.com>
Too many references in a chunk object causes chunk related operation slow. This commit constrains chunk dedup if the number of references of the chunk object exceeds max_chunk_ref_size. Signed-off-by: Sungmin Lee <sung_min.lee@samsung.com>
When a cls_cas_references_chunk() is called on a chunked metadata object, it makes the object's chunks be promoted in maybe_handle_manifest_detail(). It happens, for instance, while doing a chunk scrub job. However, this operation doesn't need to get evicted data. It only needs metadata information that already exists in metadata object. To prevent this object promotion, this commit adds an exception handling for this. Signed-off-by: Sungmin Lee <sung_min.lee@samsung.com>
Signed-off-by: daegon.yang <daegon.yang@samsung.com>
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This PR adds RGWDedup integration tests cods.
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