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https://issues.apache.org/jira/browse/HDDS-13117?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chu Cheng Li reassigned HDDS-13117:
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Assignee: Chu Cheng Li
> Add support for S3 conditional requests
> ---------------------------------------
>
> Key: HDDS-13117
> URL: https://issues.apache.org/jira/browse/HDDS-13117
> Project: Apache Ozone
> Issue Type: Sub-task
> Reporter: Ivan Andika
> Assignee: Chu Cheng Li
> Priority: Major
>
> [https://docs.aws.amazon.com/AmazonS3/latest/userguide/conditional-requests.html]
> Last year, AWS S3 supported conditional writes (although GCS has supported it
> for a long time). Conditional reads have been supported for a while.
> This feature has been used by some applications (databases on s3). One blog
> ([https://www.morling.dev/blog/leader-election-with-s3-conditional-writes/])
> also implemented a PoC of leader election based on s3 conditional writes.
> HDDS-10656 has already implemented a atomic rewrite key feature, but we need
> to check whether we can use this feature.
> Currently OM HA has only a single Raft group with a single applier thread
> (see Ratis StateMachineUpdater), therefore it should be quite straightforward
> (at least for conditional writes). However, a short design doc will be
> useful. We can separate this tickets to multiple smaller tickets
> # Conditional reads (HeadObject / GetObject)
> # Conditional copy (CopyObject): See release 2.37.0 (Add conditional writes
> in CopyObject on destination key to prevent unintended object modifications.)
> # Conditional writes
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