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https://issues.apache.org/jira/browse/HBASE-6577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13433898#comment-13433898
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Lars Hofhansl commented on HBASE-6577:
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@Ram: I see.
I think filters and coprocessors should be kept separately. There are many
places where filters fast forward and if we decorate all those points with a CP
hooks we'd slow things down again.
If one needs to hook into fast forward seeking with a CP hook I think one
should use the reseek that you added RegionScanner from within a coprocessor
instead of a filter.
(I hope I unserstood the comment correctly).
So from that viewpoint I would find it weird to place a CP hook inside of
filter fast forward optimization code.
> RegionScannerImpl.nextRow() should seek to next row
> ---------------------------------------------------
>
> Key: HBASE-6577
> URL: https://issues.apache.org/jira/browse/HBASE-6577
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Fix For: 0.96.0, 0.94.2
>
> Attachments: 6577.txt
>
>
> RegionScannerImpl.nextRow() is called when a filter filters the entire row.
> In that case we should seek to the next row rather then iterating over all
> versions of all columns to get there.
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