[jira] [Resolved] (FLINK-25580) Minor improvements for RocksDBIncrementalCheckpointUtils

["Yun Tang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-25580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yun Tang resolved FLINK-25580.
------------------------------
    Resolution: Fixed

Megred in master: b7fd63b41500dbfeadbf2ee48e1a83d77cd1259b

> Minor improvements for RocksDBIncrementalCheckpointUtils
> --------------------------------------------------------
>
>                 Key: FLINK-25580
>                 URL: https://issues.apache.org/jira/browse/FLINK-25580
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / State Backends
>            Reporter: Aitozi
>            Priority: Minor
>              Labels: pull-request-available
>
> {{RocksDBIncrementalCheckpointUtils}} use {{intersectGroup.getNumberOfKeyGroups() * overlapFraction * overlapFraction}} to evaluate the score of the state handle. It's meaning is not so explicit. And the rule to choose the handle should be 
> 1. Choose the bigger intersect group range first
> 2. If the intersect group range are same, we use the handle with higher overlap fraction, which means less iterator delete operation.
> After we introduce the {{deleteRange}} api, this rule can still work. 



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