[jira] [Resolved] (HDFS-16277) Improve decision in AvailableSpaceBlockPlacementPolicy

["Ayush Saxena (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-16277?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ayush Saxena resolved HDFS-16277.
---------------------------------
    Fix Version/s: 3.3.2
                   3.4.0
     Hadoop Flags: Reviewed
       Resolution: Fixed

> Improve decision in AvailableSpaceBlockPlacementPolicy
> ------------------------------------------------------
>
>                 Key: HDFS-16277
>                 URL: https://issues.apache.org/jira/browse/HDFS-16277
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: block placement
>    Affects Versions: 3.3.1
>            Reporter: guo
>            Assignee: guo
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.4.0, 3.3.2
>
>          Time Spent: 5h 10m
>  Remaining Estimate: 0h
>
> Hi 
> In product environment,we may meet two or more datanode usage reaches nealy 100%,for exampe 99.99%,98%,97%.
> if we configure `AvailableSpaceBlockPlacementPolicy` , we also have the chance to choose the 99.99%(assume it is the highest usage),for we treat the two choosen datanode as the same usage if their storage usage are different within 5%.
> but this is not what we want, so i suggest we can improve the decision.



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