GitHub user sihuazhou opened a pull request:
https://github.com/apache/flink/pull/5650
[FLINK-8845][state] Introduce RocksDBWriteBatchWrapper to improve
performance for recovery in RocksDB backend
## What is the purpose of the change
This PR addresses
[FLINK-8845](https://issues.apache.org/jira/browse/FLINK-8845), which attempts
to use `WriteBatch` to improve the performance for loading data into RocksDB.
It's inspired by [RocksDB
FAQ](https://github.com/facebook/rocksdb/wiki/RocksDB-FAQ).
## Brief change log
- *Introduce `RocksDBWriteBatchWrapper` to load data into RocksDB in bulk*
## Verifying this change
- Introduce `RocksDBWriteBatchWrapperTest.java` to guard
`RocksDBWriteBatchWrapper`.
## 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: (yes)
- The S3 file system connector: (no)
## Documentation
none
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sihuazhou/flink rocksdb_write_batch
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/5650.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #5650
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commit e710287495d2a1a12a99b812c9691e12c6c57459
Author: sihuazhou <summerleafs@...>
Date: 2018-03-07T05:58:45Z
Introduce RocksDBWriteBatchWrapper to speed up write performance.
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