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From "Chengxiang Li (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-2240) Use BloomFilter to minimize probe side records which are spilled to disk in Hybrid-Hash-Join
Date Thu, 18 Jun 2015 09:22:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-2240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chengxiang Li updated FLINK-2240:
---------------------------------
    Summary: Use BloomFilter to minimize probe side records which are spilled to disk in Hybrid-Hash-Join
 (was: Use BloomFilter to minmize build side records which spilled to disk in Hybrid-Hash-Join)

> Use BloomFilter to minimize probe side records which are spilled to disk in Hybrid-Hash-Join
> --------------------------------------------------------------------------------------------
>
>                 Key: FLINK-2240
>                 URL: https://issues.apache.org/jira/browse/FLINK-2240
>             Project: Flink
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Chengxiang Li
>            Priority: Minor
>
> In Hybrid-Hash-Join, while small table does not fit into memory, part of the small table
data would be spilled to disk, and the counterpart partition of big table data would be spilled
to disk in probe phase as well. If we build a BloomFilter while spill small table to disk
during build phase, and use it to filter the big table records which tend to be spilled to
disk, this may greatly  reduce the spilled big table file size, and saved the disk IO cost
for writing and further reading.



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