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https://issues.apache.org/jira/browse/HDDS-16082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Janus Chow updated HDDS-16082:
------------------------------
    Description: 
This ticket includes the following tasks:
|*Sub-task*|*Scope*|*Acceptance*|
|T5.1 PUT null-slot overwrite|SUSPENDED PUT locates and replaces the null 
slot|no version accumulation; old null-version data reclaimed; Enabled-era 
versions unaffected.
the new record becomes the current version even when the null slot was 
noncurrent|
|T5.2 DELETE null marker|SUSPENDED DELETE writes an isNullVersion=true 
marker|overwrites the existing null slot; historical versions stay 
readable/deletable by versionId|
|T5.3 pre-versioning keys, zero migration|keys written before enabling 
versioning interpreted as null versions|no data rewrite of any kind; 
versionId=null addressing hits the legacy record|
|T5.4 MPU version retention|multipart upload completion follows the same 
version-retention path as PUT|the superseded version is demoted to the 
versionedKeyTable instead of being dropped — it stays readable by versionId and 
its blocks are neither leaked nor reclaimed; the completed key carries a 
generated versionId; a SUSPENDED completion takes the null slot with the same 
semantics as T5.1|

  was:
This ticket includes the following tasks:
|*Sub-task*|*Scope*|*Acceptance*|
|T5.1 PUT null-slot overwrite|SUSPENDED PUT locates and replaces the null 
slot|no version accumulation; old null-version data reclaimed; Enabled-era 
versions unaffected.
the new record becomes the current version even when the null slot was 
noncurrent|
|T5.2 DELETE null marker|SUSPENDED DELETE writes an isNullVersion=true 
marker|overwrites the existing null slot; historical versions stay 
readable/deletable by versionId|
|T5.3 pre-versioning keys, zero migration|keys written before enabling 
versioning interpreted as null versions|no data rewrite of any kind; 
versionId=null addressing hits the legacy record|


> [Ozone versioning] [T5] SUSPENDED semantics
> -------------------------------------------
>
>                 Key: HDDS-16082
>                 URL: https://issues.apache.org/jira/browse/HDDS-16082
>             Project: Apache Ozone
>          Issue Type: Sub-task
>            Reporter: Janus Chow
>            Assignee: Janus Chow
>            Priority: Major
>
> This ticket includes the following tasks:
> |*Sub-task*|*Scope*|*Acceptance*|
> |T5.1 PUT null-slot overwrite|SUSPENDED PUT locates and replaces the null 
> slot|no version accumulation; old null-version data reclaimed; Enabled-era 
> versions unaffected.
> the new record becomes the current version even when the null slot was 
> noncurrent|
> |T5.2 DELETE null marker|SUSPENDED DELETE writes an isNullVersion=true 
> marker|overwrites the existing null slot; historical versions stay 
> readable/deletable by versionId|
> |T5.3 pre-versioning keys, zero migration|keys written before enabling 
> versioning interpreted as null versions|no data rewrite of any kind; 
> versionId=null addressing hits the legacy record|
> |T5.4 MPU version retention|multipart upload completion follows the same 
> version-retention path as PUT|the superseded version is demoted to the 
> versionedKeyTable instead of being dropped — it stays readable by versionId 
> and its blocks are neither leaked nor reclaimed; the completed key carries a 
> generated versionId; a SUSPENDED completion takes the null slot with the same 
> semantics as T5.1|



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