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https://issues.apache.org/jira/browse/HBASE-9769?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vladimir Rodionov updated HBASE-9769:
-------------------------------------
Release Note:
The feature allows to improve performance of scan operations when table rows
are small/medium size and scan operation contains explicit set of
column:qualifiers to filter on. By default, the feature is disabled. To enable
it set Scan.HINT_NARROW_ROWS attribute of Scan object instance:
Scan scan = ...
scan.setAttribute(Scan.HINT_NARROW_ROWS, "true".getBytes());
The performance improvement depends on a average row size. The smaller rows are
- the larger performance improvement is.
was:
The feature allows to improve performance of scan operations when table rows
are small/medium size. By default, it is disabled. To enable feature set
Scan.HINT_NARROW_ROWS attribute:
Scan scan = ...
scan.setAttribute(Scan.HINT_NARROW_ROWS, "true".getBytes());
The performance improvement depends on a average row size. The smaller rows are
- the larger performance improvement is.
> Improve performance of a Scanner with explicit column list when rows are
> small/medium size
> ------------------------------------------------------------------------------------------
>
> Key: HBASE-9769
> URL: https://issues.apache.org/jira/browse/HBASE-9769
> Project: HBase
> Issue Type: Improvement
> Components: Scanners
> Affects Versions: 0.98.0, 0.94.12, 0.96.0
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Attachments: 9769-0.94-sample1.txt, 9769-0.94-sample2.txt,
> 9769-0.94-sample.txt, 9769-94.txt, 9769-94-v2.txt, 9769-trunk-v1.txt,
> 9769-trunk-v2.txt, 9769-trunk-v3.txt, 9769-trunk-v4.txt
>
>
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