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git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/swift refs/changes/95/872595/1"}}},"commit":{"parents":[{"commit":"247c17b60cbf398c49c44f81252184a564d73eca","subject":"Merge \"Sharding: No stat updates before CLEAVED state\"","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/247c17b60cbf398c49c44f81252184a564d73eca"}]}],"author":{"name":"Tim Burke","email":"tim.burke@gmail.com","date":"2021-09-02 17:12:54.000000000","tz":-420},"committer":{"name":"Clay Gerrard","email":"clay.gerrard@gmail.com","date":"2023-02-02 19:03:05.000000000","tz":-360},"subject":"ring: Introduce a v2 ring format","message":"ring: Introduce a v2 ring format\n\n* New required metadata: dev_id_bytes -- the number of bytes each device\n  ID occupies. While this commit does not start writing values other\n  than 2, it *can* read values of 1, 2, or 4.\n* New length-encoding for fields in on-disk structure. This ensures we\n  know where to stop reading the replica2part2dev table even when there\n  is a fractional replica count. The length is always a 64-bit value,\n  including the one used for the JSON metadata length.\n* Removed the replica_count metadata item. This is no longer necessary,\n  as it can be calculated from the part_shift, dev_id_bytes, and\n  replica2part2dev length.\n* Removed the byteorder metadata item. Ring data should always be\n  written down with network (big endian) order.\n\nThere\u0027s a bunch of moving pieces here:\n\n- Add a new RingWriter class.\n\n  Stick it in a new swift.common.ring.io module. You *can* use it like\n  the old gzip file, but you can also define named sections which can\n  be referenced later on read. Section names may be arbitrary strings,\n  but the \"swift/\" prefix is reserved for upstream use. Sections must\n  contain a single length-value encoded BLOB. If sections are used, an\n  additional BLOB is written at the end containing a JSON section-index,\n  followed by an uncompressed offset for the index.\n\n  Move RingReader to ring/io.py, too.\n\n- Drop MD5 tracking in RingReader. It was brittle at best anyway, and\n  nothing uses it. YAGNI\n\n  Drive-by: Fix size/raw_size attributes when loading only metadata.\n\n- Add the ability to seek within RingReaders, though you need to know\n  what you\u0027re doing and only seek to flush points.\n\n- Let RingData and RingBuilder objects change how wide their\n  replica2part2dev_id arrays are. Add a dev_id_bytes key to serialized\n  ring metadata.\n\nSee: https://etherpad.opendev.org/p/swift-ring-v2-serialization\n\nChange-Id: I8929d18f98aac32aaa4c777d4134d992afb89d7a\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/c9890fb087384080ebadeeca74ce6ac6235445bb"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/c9890fb087384080ebadeeca74ce6ac6235445bb"}]},"branch":"refs/heads/master"},"7e4ac43d703f93a82ae4568c762f637fa23eef48":{"kind":"REWORK","_number":2,"created":"2023-02-16 20:15:39.000000000","uploader":{"_account_id":1179,"name":"Clay Gerrard","email":"clay.gerrard@gmail.com","username":"clay-gerrard"},"ref":"refs/changes/95/872595/2","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/swift","ref":"refs/changes/95/872595/2","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/swift refs/changes/95/872595/2 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/swift refs/changes/95/872595/2 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/swift refs/changes/95/872595/2 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/swift refs/changes/95/872595/2"}}},"commit":{"parents":[{"commit":"247c17b60cbf398c49c44f81252184a564d73eca","subject":"Merge \"Sharding: No stat updates before CLEAVED state\"","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/247c17b60cbf398c49c44f81252184a564d73eca"}]}],"author":{"name":"Tim Burke","email":"tim.burke@gmail.com","date":"2021-09-02 17:12:54.000000000","tz":-420},"committer":{"name":"Clay Gerrard","email":"clay.gerrard@gmail.com","date":"2023-02-16 19:57:52.000000000","tz":-360},"subject":"ring: Introduce a v2 ring format","message":"ring: Introduce a v2 ring format\n\n* New required metadata: dev_id_bytes -- the number of bytes each device\n  ID occupies. While this commit does not start writing values other\n  than 2, it *can* read values of 1, 2, or 4.\n* New length-encoding for fields in on-disk structure. This ensures we\n  know where to stop reading the replica2part2dev table even when there\n  is a fractional replica count. The length is always a 64-bit value,\n  including the one used for the JSON metadata length.\n* Removed the replica_count metadata item. This is no longer necessary,\n  as it can be calculated from the part_shift, dev_id_bytes, and\n  replica2part2dev length.\n* Removed the byteorder metadata item. Ring data should always be\n  written down with network (big endian) order.\n\nThere\u0027s a bunch of moving pieces here:\n\n- Add a new RingWriter class.\n\n  Stick it in a new swift.common.ring.io module. You *can* use it like\n  the old gzip file, but you can also define named sections which can\n  be referenced later on read. Section names may be arbitrary strings,\n  but the \"swift/\" prefix is reserved for upstream use. Sections must\n  contain a single length-value encoded BLOB. If sections are used, an\n  additional BLOB is written at the end containing a JSON section-index,\n  followed by an uncompressed offset for the index.\n\n  Move RingReader to ring/io.py, too.\n\n- Drop MD5 tracking in RingReader. It was brittle at best anyway, and\n  nothing uses it. YAGNI\n\n  Drive-by: Fix size/raw_size attributes when loading only metadata.\n\n- Add the ability to seek within RingReaders, though you need to know\n  what you\u0027re doing and only seek to flush points.\n\n- Let RingData and RingBuilder objects change how wide their\n  replica2part2dev_id arrays are. Add a dev_id_bytes key to serialized\n  ring metadata.\n\nSee: https://etherpad.opendev.org/p/swift-ring-v2-serialization\n\nChange-Id: I8929d18f98aac32aaa4c777d4134d992afb89d7a\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/7e4ac43d703f93a82ae4568c762f637fa23eef48"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/swift/commit/7e4ac43d703f93a82ae4568c762f637fa23eef48"}]},"branch":"refs/heads/master"}},"requirements":[],"submit_records":[{"rule_name":"gerrit~DefaultSubmitRule","status":"OK","labels":[{"label":"Verified","status":"MAY","applied_by":{"_account_id":22348,"name":"Zuul","username":"zuul","tags":["SERVICE_USER"]}},{"label":"Code-Review","status":"MAY"},{"label":"Workflow","status":"MAY"}]}],"submit_requirements":[{"name":"Verified","description":"Verified in gate by CI","status":"UNSATISFIED","is_legacy":false,"submittability_expression_result":{"expression":"label:Verified\u003dMAX AND -label:Verified\u003dMIN","fulfilled":false,"status":"FAIL","passing_atoms":[],"failing_atoms":["label:Verified\u003dMAX","label:Verified\u003dMIN"],"atom_explanations":{"label:Verified\u003dMAX":"","label:Verified\u003dMIN":""}}},{"name":"Code-Review","description":"Code reviewed by core reviewer","status":"UNSATISFIED","is_legacy":false,"submittability_expression_result":{"expression":"label:Code-Review\u003dMAX AND -label:Code-Review\u003dMIN","fulfilled":false,"status":"FAIL","passing_atoms":[],"failing_atoms":["label:Code-Review\u003dMAX","label:Code-Review\u003dMIN"],"atom_explanations":{"label:Code-Review\u003dMAX":"","label:Code-Review\u003dMIN":""}}},{"name":"Workflow","description":"Approved for gate by core reviewer","status":"UNSATISFIED","is_legacy":false,"submittability_expression_result":{"expression":"label:Workflow\u003dMAX AND -label:Workflow\u003dMIN","fulfilled":false,"status":"FAIL","passing_atoms":[],"failing_atoms":["label:Workflow\u003dMAX","label:Workflow\u003dMIN"],"atom_explanations":{"label:Workflow\u003dMAX":"","label:Workflow\u003dMIN":""}}}]}