[ https://issues.apache.org/jira/browse/HBASE-10974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Enis Soztutar updated HBASE-10974: ---------------------------------- Fix Version/s: (was: 0.99.2) 2.0.0 1.0.0 > Improve DBEs read performance by avoiding byte array deep copies for key[] > and value[] > -------------------------------------------------------------------------------------- > > Key: HBASE-10974 > URL: https://issues.apache.org/jira/browse/HBASE-10974 > Project: HBase > Issue Type: Improvement > Components: Scanners > Affects Versions: 0.99.0 > Reporter: ramkrishna.s.vasudevan > Assignee: ramkrishna.s.vasudevan > Fix For: 1.0.0, 2.0.0 > > Attachments: HBASE-10974_1.patch > > > As part of HBASE-10801, we tried to reduce the copy of the value [] in > forming the KV from the DBEs. > The keys required copying and this was restricting us in using Cells and > always wanted to copy to be done. > The idea here is to replace the key byte[] as ByteBuffer and create a > consecutive stream of the keys (currently the same byte[] is used and hence > the copy). Use offset and length to track this key bytebuffer. > The copy of the encoded format to normal Key format is definitely needed and > can't be avoided but we could always avoid the deep copy of the bytes to form > a KV and thus use cells effectively. Working on a patch, will post it soon. -- This message was sent by Atlassian JIRA (v6.3.4#6332)