[ https://issues.apache.org/jira/browse/HBASE-15721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Anoop Sam John updated HBASE-15721: ----------------------------------- Attachment: HBASE-15721_V2.patch Patch fixing comments from Ram and Ted. > Optimization in cloning cells into MSLAB > ---------------------------------------- > > Key: HBASE-15721 > URL: https://issues.apache.org/jira/browse/HBASE-15721 > Project: HBase > Issue Type: Sub-task > Components: regionserver > Reporter: Anoop Sam John > Assignee: Anoop Sam John > Fix For: 2.0.0 > > Attachments: HBASE-15721.patch, HBASE-15721_V2.patch > > > Before cells added to memstore CSLM, there is a clone of cell after copying > it to MSLAB chunk area. This is done not in an efficient way. > {code} > public static int appendToByteArray(final Cell cell, final byte[] output, > final int offset) { > int pos = offset; > pos = Bytes.putInt(output, pos, keyLength(cell)); > pos = Bytes.putInt(output, pos, cell.getValueLength()); > pos = appendKeyTo(cell, output, pos); > pos = CellUtil.copyValueTo(cell, output, pos); > if ((cell.getTagsLength() > 0)) { > pos = Bytes.putAsShort(output, pos, cell.getTagsLength()); > pos = CellUtil.copyTagTo(cell, output, pos); > } > return pos; > } > {code} > Copied in 9 steps and we end up parsing all lengths. When the cell > implementation is backed by a single byte[] (Like KeyValue) this can be done > in single step copy. -- This message was sent by Atlassian JIRA (v6.3.4#6332)