[jira] [Commented] (FLINK-9561) Lack of the api to set RocksDB Option by flink config

["Sihua Zhou (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-9561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16507249#comment-16507249 ] 

Sihua Zhou commented on FLINK-9561:
-----------------------------------

Hi [~aitozi] I think flink already supported this, you can implement the {{OptionsFactory}} to override the {{OptionsFactory#createDBOptions}} to special your {{DBOptions}}, and override the {{OptionsFactory#createColumnOptions}} to special your {{ColumnFamilyOptions}}. A simple example likes like below

{code:java}
 rocksDbBackend.setOptions(new OptionsFactory() {
 
      public DBOptions createDBOptions(DBOptions currentOptions) {
          return currentOptions.setMaxOpenFiles(1024);
      }
     
     public ColumnFamilyOptions createColumnOptions(ColumnFamilyOptions currentOptions) {
         return currentOptions.setCompactionStyle(org.rocksdb.CompactionStyle.LEVEL);
     }
 });
{code}

> Lack of the api to set RocksDB Option by flink config
> -----------------------------------------------------
>
>                 Key: FLINK-9561
>                 URL: https://issues.apache.org/jira/browse/FLINK-9561
>             Project: Flink
>          Issue Type: Improvement
>          Components: State Backends, Checkpointing
>    Affects Versions: 1.5.0
>            Reporter: aitozi
>            Assignee: aitozi
>            Priority: Major
>
> we have serval PredefinedOptions for rocksdb options, but it is not configurable, I think should support this to allow user to choose according to the device. [~StephanEwen] do you think so?



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