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Posted to issues@flink.apache.org by "Congxian Qiu(klion26) (Jira)" <ji...@apache.org> on 2020/01/20 02:58:00 UTC
[jira] [Commented] (FLINK-15637) For RocksDBStateBackend, make
RocksDB the default store for timers
[ https://issues.apache.org/jira/browse/FLINK-15637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17019194#comment-17019194 ]
Congxian Qiu(klion26) commented on FLINK-15637:
-----------------------------------------------
Ran the benchmark of {{RocksDBStateBackend}}, there will be some regression after applying this change. for no incremental mode, there is 4.6% regression, and 2.9% regression for incremental mode.
* Result before applying the change
{code:java}
Benchmark (stateBackend) Mode Cnt Score Error Units
RocksStateBackendBenchmark.stateBackends ROCKS thrpt 30 203.893 ± 1.580 ops/ms
RocksStateBackendBenchmark.stateBackends ROCKS_INC thrpt 30 201.896 ± 5.179 ops/ms
{code}
* Result after applying the change
{code:java}
Benchmark (stateBackend) Mode Cnt Score Error Units RocksStateBackendBenchmark.stateBackends ROCKS thrpt 30 194.382 ± 2.256 ops/ms RocksStateBackendBenchmark.stateBackends ROCKS_INC thrpt 30 195.912 ± 2.151 ops/ms
{code}
Steps for generating the result
# checkout the commit before applying the change and install
# run the benchmark to get the result
# checkout the commit after applying the change and install
# run the benchmark to get the result.
> For RocksDBStateBackend, make RocksDB the default store for timers
> ------------------------------------------------------------------
>
> Key: FLINK-15637
> URL: https://issues.apache.org/jira/browse/FLINK-15637
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / State Backends
> Reporter: Stephan Ewen
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 1.10.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Set the {{state.backend.rocksdb.timer-service.factory}} to {{ROCKSDB}} by default. Also ensure that the programmatic default value becomes the same.
> We need to update the performance tuning guide to mention this.
>
> We need to update the release notes to mention this.
>
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