[ https://issues.apache.org/jira/browse/HADOOP-2485?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HADOOP-2485: -------------------------- Status: Patch Available (was: In Progress) > [hbase] Make mapfile index interval configurable > ------------------------------------------------ > > Key: HADOOP-2485 > URL: https://issues.apache.org/jira/browse/HADOOP-2485 > Project: Hadoop > Issue Type: Improvement > Components: contrib/hbase > Reporter: stack > Assignee: stack > Priority: Minor > Fix For: 0.16.0 > > Attachments: 2485.patch, index.patch > > > Default mapfile index interval is every 128 entries. Basic tests show > PerformanceEvaluation mapfile test random reading 100k records in 60plus > seconds. If index interval is set to 1 so we don't have to next around > looking for our record, then 100k random reads take 7 seconds. This is using > local filesystem. If I set it to 16, then takes 12 seconds. > Testing doing PerformanceEvaluation random reads against hbase, with interval > set to 16, we run 50% faster (hdfs is in the picture). -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.