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https://issues.apache.org/jira/browse/HBASE-9769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13802634#comment-13802634
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chunhui shen commented on HBASE-9769:
-------------------------------------
HBASE-5987 would greatly improve the performance for this case , I think.
'reseek' is optimizated in HBASE-5987.
{noformat}
+ // The reader shall continue to scan the current data block
instead of querying the
+ // block index as long as it knows the target key is strictly
smaller than
+ // the next indexed key or the current data block is the last data
block.
{noformat}
In addition, Performace difference is not so much between expliciting column
list and scaning wildcard columns in my test environment. I think it's the
effect of HBASE-5987 since we applied it
> 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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