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https://issues.apache.org/jira/browse/HBASE-4962?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mikhail Bautin resolved HBASE-4962.
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Resolution: Duplicate
> Optimize time range scans using a delete Bloom filter
> -----------------------------------------------------
>
> Key: HBASE-4962
> URL: https://issues.apache.org/jira/browse/HBASE-4962
> Project: HBase
> Issue Type: Improvement
> Reporter: Mikhail Bautin
> Assignee: Pritam Damania
> Priority: Minor
>
> To speed up time range scans we need to seek to the maximum timestamp of the
> requested range,instead of going to the first KV of the (row, column) pair
> and iterating from there. If we don't know the (row, column), e.g. if it is
> not specified in the query, we need to go to end of the current row/column
> pair first, get a KV from there, and do another seek to (row', column',
> timerange_max) from there. We can only skip over to the timerange_max
> timestamp when we know that there are no DeleteColumn records at the top of
> that row/column with a higher timestamp. We can utilize another Bloom filter
> keyed on (row, column) to quickly find that out.
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