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https://issues.apache.org/jira/browse/HBASE-13761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14557962#comment-14557962
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Vladimir Rodionov commented on HBASE-13761:
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Optimizations in this patch:
* new implementation of satisfies method using Unsafe access (8 bytes at a time)
* When there are more than one fuzzy keys, significant improvement in handling
in getNextCellHint
* When there are more than one fuzzy keys, we keep track of a last matched
fuzzy key and try it next time first.
Performance:
YMMV, but in my tests (RegionScanner - not ResultScanner) I observed numbers
between 7-10% (for single fuzzy key) up to 100% (for 20 fuzzy keys). The more
fuzzy keys in a filter - the more performance gain is.
This filter runs at the same speed regardless of a number of fuzzy search keys:
1, 20, 100 ...
> Optimize FuzzyRowFilter
> -----------------------
>
> Key: HBASE-13761
> URL: https://issues.apache.org/jira/browse/HBASE-13761
> Project: HBase
> Issue Type: Improvement
> Components: Filters
> Affects Versions: 2.0.0, 1.1.0, 0.98.13
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Priority: Minor
> Fix For: 2.0.0, 0.98.14, 1.1.1
>
> Attachments: HBASE-13761.patch
>
>
> FuzzyRowFilter has some room for improvements: a lot of byte-by-byte
> arithmetic, non-efficient algorithm of selecting next candidate row etc.
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