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https://issues.apache.org/jira/browse/HDDS-15946?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Janus Chow updated HDDS-15946:
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Summary: [Ozone versioning] [T2] VersionId generation strategy framework
(was: [Ozone versioning] VersionId generation strategy framework)
> [Ozone versioning] [T2] VersionId generation strategy framework
> ---------------------------------------------------------------
>
> Key: HDDS-15946
> URL: https://issues.apache.org/jira/browse/HDDS-15946
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Janus Chow
> Assignee: Janus Chow
> Priority: Major
>
> This ticket includes the follows tasks:
> |*Sub-task*|*Scope*|*Acceptance*|
> |T2.1 interface + default generator|`VersionIdGenerator` interface;
> `TransactionIndexVersionIdGenerator`; the
> `ozone.om.versioning.version-id-generator` class-name config, loaded
> reflectively|shared contract test (strictly increasing / frozen / reserved
> ids) run against every generator; unknown class and class not implementing
> the interface both rejected; default generator carries no allocator state|
> |T2.2 commit-time ordering check|`VersionIdAllocator`: refuse a commit whose
> id does not come after the key's current version; fall back to a
> versionedKeyTable lookup for records predating versioning|increasing id
> accepted; id at or below the current one rejected with `INVALID_REQUEST`;
> taken id on a pre-versioning record rejected with `KEY_ALREADY_EXISTS`;
> steady state performs no lookup (unit test asserts versionedKeyTable is never
> touched)|
> |T2.3 pinned-first generator|`PinnedFirstVersionIdGenerator`: first-version
> detection (no current in keyTable) + `FIRST_VERSION_ID = 1` sentinel|first
> PUT gets the sentinel, later PUTs get transaction indexes; sentinel sorts
> before every transaction index; sentinel does not collide with the null slot;
> selectable by configuration|
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