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From "Pranav Khaitan (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HBASE-1517) Implement inexpensive seek operations in HFile
Date Sat, 14 Aug 2010 08:00:17 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1517?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Pranav Khaitan resolved HBASE-1517.
-----------------------------------

    Hadoop Flags: [Reviewed]
      Resolution: Fixed

Code submitted.
Committed by Ryan. 
Thanks to Ryan, Stack and Ted for their feedback on this!

> Implement inexpensive seek operations in HFile
> ----------------------------------------------
>
>                 Key: HBASE-1517
>                 URL: https://issues.apache.org/jira/browse/HBASE-1517
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.20.0
>            Reporter: Jonathan Gray
>            Assignee: Pranav Khaitan
>             Fix For: 0.90.0
>
>         Attachments: ReseekV10.patch
>
>
> When we early-out of a row because of columns, versions, filters, etc... we seek to the
end of that row one key at a time.  We should do the seek at the HFile level in cases where
we would end up skipping blocks in the process.  This will be very common in cases with relatively
large rows and regex row filters.
> If calls that end up doing nothing are constant time, we could also call this to seek
to the next column (or even a specific column in ExplicitTracker case).

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