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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-2362) Improve gets/scans when all columns of a key is requested.
Date Wed, 16 Jul 2014 22:05:06 GMT

     [ https://issues.apache.org/jira/browse/HBASE-2362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell resolved HBASE-2362.
-----------------------------------

    Resolution: Not a Problem

Reopen or file new issue if relevant for modern HBase versions

> Improve gets/scans when all columns of a key is requested.
> ----------------------------------------------------------
>
>                 Key: HBASE-2362
>                 URL: https://issues.apache.org/jira/browse/HBASE-2362
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: Karthik Ranganathan
>
> Right now, we get one KeyValue at a time and run it through the matcher even if the query
is to fetch the entire row (or even an entire column family for a key). This causes the blocks
to be fetched serially from HDFS. We can optimize this by looking at the block map, and fetching
all the blocks spanned by the key in one request to HDFS.



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