[
https://issues.apache.org/jira/browse/FLINK-9702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16706121#comment-16706121
]
ASF GitHub Bot commented on FLINK-9702:
---------------------------------------
klion26 opened a new pull request #7210: [FLINK-9702][State Backends,
Checkpointing] Improvement in (de)serialization of keys and values for RocksDB
state
URL: https://github.com/apache/flink/pull/7210
## What is the purpose of the change
When Flink interacts with state in RocksDB, object (de)serialization often
contributes significantly to performance overhead. In particular, currently
every state has to serialize the backen's current key before each state access.
This PR wants to reduce this effort by sharing serialized key bytes across all
state interactions.
## Verifying this change
This change is already covered by existing tests
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (**no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (**no**)
- The serializers: (**no**)
- The runtime per-record code paths (performance sensitive): (**no**)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, ZooKeeper: (**no**)
- The S3 file system connector: (**no**)
## Documentation
- Does this pull request introduce a new feature? (**no**)
- If yes, how is the feature documented? (**not applicable**)
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
> Improvement in (de)serialization of keys and values for RocksDB state
> ---------------------------------------------------------------------
>
> Key: FLINK-9702
> URL: https://issues.apache.org/jira/browse/FLINK-9702
> Project: Flink
> Issue Type: Improvement
> Components: State Backends, Checkpointing
> Affects Versions: 1.6.0
> Reporter: Stefan Richter
> Assignee: Congxian Qiu
> Priority: Major
> Labels: pull-request-available
>
> When Flink interacts with state in RocksDB, object (de)serialization often
> contributes significantly to performance overhead. I think there are some
> aspects that we can improve here to reduce the costs in this area. In
> particular, currently every state has to serialize the backen's current key
> before each state access. We could reduce this effort by sharing serialized
> key bytes across all state interactions. Furthermore, we can reduce the
> amount of `byte[]` and stream/view that are involved.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
