[jira] [Updated] (FLINK-26560) Make the threshold of the overlap fraction of incremental restoring configurable

["Yanfei Lei (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-26560?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yanfei Lei updated FLINK-26560:
-------------------------------
        Parent: FLINK-28038
    Issue Type: Sub-task  (was: Improvement)

> Make the threshold of the overlap fraction of incremental restoring configurable
> --------------------------------------------------------------------------------
>
>                 Key: FLINK-26560
>                 URL: https://issues.apache.org/jira/browse/FLINK-26560
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Runtime / State Backends
>    Affects Versions: 1.15.0
>            Reporter: Yanfei Lei
>            Assignee: Yanfei Lei
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.16.0
>
>
> Currently, the threshold of the overlap fraction of incremental restoring `OVERLAP_FRACTION_THRESHOLD` is a hard-coded, fixed value.
>  
> {code:java}
> public class RocksDBIncrementalCheckpointUtils {
>     /**
>      * The threshold of the overlap fraction of the handle's key-group range with target key-group
>      * range to be an initial handle.
>      */
>     private static final double OVERLAP_FRACTION_THRESHOLD = 0.75;
> ...
> } {code}
>  
> `OVERLAP_FRACTION_THRESHOLD` is used to control how to restore a state handle, different thresholds can affect the performance of restoring. The behavior of deletion in restoring has been changed after FLINK-21321, the old threshold no longer fits the current situation.
> To make it easier to modify the threshold according to different situations, changing `OVERLAP_FRACTION_THRESHOLD` to be configurable is suggested.



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