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Posted to issues@kylin.apache.org by "liyang (JIRA)" <ji...@apache.org> on 2017/01/07 11:36:58 UTC

[jira] [Resolved] (KYLIN-2349) Serialize BitmapCounter with peekLength

     [ https://issues.apache.org/jira/browse/KYLIN-2349?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

liyang resolved KYLIN-2349.
---------------------------
       Resolution: Fixed
    Fix Version/s: v2.0.0

> Serialize BitmapCounter with peekLength
> ---------------------------------------
>
>                 Key: KYLIN-2349
>                 URL: https://issues.apache.org/jira/browse/KYLIN-2349
>             Project: Kylin
>          Issue Type: Improvement
>          Components: Metadata
>    Affects Versions: v1.6.0
>            Reporter: kangkaisen
>            Assignee: kangkaisen
>             Fix For: v2.0.0
>
>         Attachments: KYLIN-2349.patch
>
>
> Currently, in {{BitmapCounter}} we deserialize the bitmap to get the peekLength, we know which is expensive in terms of CPU time from JMC hot code.
> Actually, we could Serialize {{BitmapCounter}} with peekLength to avoid deserializing the bitmap when we get peekLength.
> Of course, we need to keep forward compatibility.



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