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Hudson commented on HBASE-4434: ------------------------------- Integrated in HBase-0.92 #18 (See [https://builds.apache.org/job/HBase-0.92/18/]) HBASE-4434: Don't do HFile Scanner next() unless the next KV is needed stack : Files : * /hbase/branches/0.92/CHANGES.txt * /hbase/branches/0.92/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileScanner.java * /hbase/branches/0.92/src/test/java/org/apache/hadoop/hbase/regionserver/TestBlocksRead.java > seek optimization: don't do eager HFile Scanner next() unless the next KV is > needed > ----------------------------------------------------------------------------------- > > Key: HBASE-4434 > URL: https://issues.apache.org/jira/browse/HBASE-4434 > Project: HBase > Issue Type: Improvement > Reporter: Kannan Muthukkaruppan > Assignee: Kannan Muthukkaruppan > Fix For: 0.92.0 > > Attachments: HBASE-4434.txt > > > When a seek/reseek is done on StoreFileScanner, in addition to setting the > current KV, it also does a HFileScanner level next() ahead of time even if > the next KV is never actually required. This inefficiency can potentially > result in additional disk seeks and sub-optimal use of the block cache > (primarily for cases where the KVs are large and each occupies an HFile block > of its own). -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira