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https://issues.apache.org/jira/browse/APEXMALHAR-2366?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bhupesh Chawda resolved APEXMALHAR-2366.
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Resolution: Done
Fix Version/s: 3.8.0
> 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
> Fix For: 3.8.0
>
> 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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