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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19002) Introduce more examples to show how to intercept normal region operations
Date Thu, 26 Oct 2017 16:45:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16220748#comment-16220748
] 

Josh Elser commented on HBASE-19002:
------------------------------------

bq. This hook has store passed to it (compared to postFlush() above this). I wonder if a different
counter than flushCounter can be used to track the occurrences.

Admittedly, this example feels a little contrived. There are two flush code-paths: one is
"flush regions on this RS to get the memstore utilization down" and the other is "flush this
specific region". IMO, they're still both "flushes" happening, but they might not really be
considered equivalent (e.g. the one flush would just be creating a single new file, whereas
the other may create multiple).

bq. How about using the same type as that of the cell ?

So, I was struggling to figure out how to convert the {{byte}} which {{Cell}} provides back
into a {{DataType}} value. However, then I realized I should really just make this only work
on Puts which solves the problem.

Will update shortly.

> Introduce more examples to show how to intercept normal region operations
> -------------------------------------------------------------------------
>
>                 Key: HBASE-19002
>                 URL: https://issues.apache.org/jira/browse/HBASE-19002
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Coprocessors
>            Reporter: Duo Zhang
>            Assignee: Josh Elser
>            Priority: Minor
>             Fix For: 2.0.0-alpha-4
>
>         Attachments: HBASE-19002.001.branch-2.patch
>
>




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