[jira] [Updated] (HBASE-12957) region_mover#isSuccessfulScan may be extremely slow on region with lots of expired data

["Ted Yu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-12957?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ted Yu updated HBASE-12957:
---------------------------
    Summary: region_mover#isSuccessfulScan may be extremely slow on region with lots of expired data  (was: region_mover#isSuccessfulScan may extremely slow on region with lots of expired data)

> region_mover#isSuccessfulScan may be extremely slow on region with lots of expired data
> ---------------------------------------------------------------------------------------
>
>                 Key: HBASE-12957
>                 URL: https://issues.apache.org/jira/browse/HBASE-12957
>             Project: HBase
>          Issue Type: Improvement
>          Components: scripts
>            Reporter: hongyu bi
>            Priority: Minor
>         Attachments: HBASE-12957-v0.patch
>
>
> region_mover will call isSuccessfulScan when region has moved to make sure it's healthy, however , if the moved region has lots of expired data region_mover#isSuccessfulScan will take a long time to finish ,that may even exceed "lease timeout".So I made isSuccessfulScan a get-like scan to achieve faster response in that case. 
> workaround:before graceful_stop/rolling_restart ，call major_compact on the table with small TTL



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