[jira] [Commented] (APEXMALHAR-2366) Apply BloomFilter to Bucket

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[jira] [Commented] (APEXMALHAR-2366) Apply BloomFilter to Bucket

JIRA jira@apache.org

    [ https://issues.apache.org/jira/browse/APEXMALHAR-2366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16040534#comment-16040534 ]

ASF GitHub Bot commented on APEXMALHAR-2366:
--------------------------------------------

GitHub user PramodSSImmaneni reopened a pull request:

    https://github.com/apache/apex-malhar/pull/631

    APEXMALHAR-2366 #resolve #comment Apply BloomFilter to Bucket, use internal BloomFilter

    @bhupeshchawda please see, this is to finish up the work started in https://github.com/apache/apex-malhar/pull/521

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/PramodSSImmaneni/apex-malhar APEXMALHAR-2366

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/apex-malhar/pull/631.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #631
   
----
commit 3c3a01777329252aaa46a39e52ab9a190dbfb74f
Author: brightchen <[hidden email]>
Date:   2016-12-05T19:34:48Z

    APEXMALHAR-2366 #resolve #comment Apply BloomFilter to Bucket, use internal BloomFilter

commit e08ccd091ff23eac38ecf7997230262c772cbdc1
Author: Pramod Immaneni <[hidden email]>
Date:   2017-06-01T21:02:26Z

    Added license references, this closes #521

----


> Apply BloomFilter to Bucket
> ---------------------------
>
>                 Key: APEXMALHAR-2366
>                 URL: https://issues.apache.org/jira/browse/APEXMALHAR-2366
>             Project: Apache Apex Malhar
>          Issue Type: Improvement
>            Reporter: bright chen
>            Assignee: bright chen
>   Original Estimate: 192h
>  Remaining Estimate: 192h
>
> The bucket get() will check the cache and then check from the stored files if the entry is not in the cache. The checking from files is a pretty heavy operation due to file seek.
> The chance of check from file is very high if the key range are large.
> Suggest to apply BloomFilter for bucket to reduce the chance read from file.
> If the buckets were managed by ManagedStateImpl, the entry of bucket would be very huge and the BloomFilter maybe not useful after a while. But If the buckets were managed by ManagedTimeUnifiedStateImpl, each bucket keep certain amount of entry and BloomFilter would be very useful.
> For implementation:
> The Guava already have BloomFilter and the interface are pretty simple and fit for our case. But Guava 11 is not compatible with Guava 14 (Guava 11 use Sink while Guava 14 use PrimitiveSink).



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