[jira] [Updated] (HBASE-29568) Allow for a configurable "grace period" when using Time Based Priority

["Duo Zhang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-29568?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Duo Zhang updated HBASE-29568:
------------------------------
    Fix Version/s: 3.0.0-beta-2
                       (was: 3.0.0)

> Allow for a configurable "grace period" when using Time Based Priority
> ----------------------------------------------------------------------
>
>                 Key: HBASE-29568
>                 URL: https://issues.apache.org/jira/browse/HBASE-29568
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 3.0.0-beta-1, 2.7.0, 2.6.4
>            Reporter: Wellington Chevreuil
>            Assignee: Deep Golani
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 2.7.0, 3.0.0-beta-2, 2.6.5
>
>
> This aims to introduce a "grace period" functionality in the bucket cache time based priority feature, allowing blocks for the given CF marked for grace period to have its age ignored by the time priority logic. 
> The use case here is that "cold" data may have to be accessed rarely, by some batch jobs, so that in these rare job runs, it can be temporarily placed in the cache, then de-prioritised again.



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