[jira] [Resolved] (HBASE-24949) Optimize FSTableDescriptors.get to not always go to fs when cache miss

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

     [ https://issues.apache.org/jira/browse/HBASE-24949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Duo Zhang resolved HBASE-24949.
-------------------------------
    Hadoop Flags: Reviewed
      Resolution: Fixed

Pushed to master and branch-2.

Thanks [~zghao] for reviewing.

> Optimize FSTableDescriptors.get to not always go to fs when cache miss
> ----------------------------------------------------------------------
>
>                 Key: HBASE-24949
>                 URL: https://issues.apache.org/jira/browse/HBASE-24949
>             Project: HBase
>          Issue Type: Improvement
>          Components: master
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>            Priority: Major
>             Fix For: 3.0.0-alpha-1, 2.4.0
>
>
> Since in the below getAll method, if fsvisited is true, we will just return what we have in cache.
> We should also do this in the get method, if fsvisited is true, we do not need to go to fs any more.
> Another benefit here is that, when executing procedures on master, we do not need to go to meta region any more, we could just check if we have a table descriptor in cache.



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