You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hbase.apache.org by "Rishit Shroff (JIRA)" <ji...@apache.org> on 2014/02/14 01:26:28 UTC
[jira] [Assigned] (HBASE-7408) Make compaction to use pread instead
of sequential read
[ https://issues.apache.org/jira/browse/HBASE-7408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Rishit Shroff reassigned HBASE-7408:
------------------------------------
Assignee: Rishit Shroff
> Make compaction to use pread instead of sequential read
> -------------------------------------------------------
>
> Key: HBASE-7408
> URL: https://issues.apache.org/jira/browse/HBASE-7408
> Project: HBase
> Issue Type: Improvement
> Reporter: Rishit Shroff
> Assignee: Rishit Shroff
> Priority: Minor
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> As we discovered lately, HFile compactions use sequential reads to fetch blocks. It cause unwanted streaming of data from HDFS to region servers when there is a cache hit. Lets change to use preads to reduce iops on disks.
--
This message was sent by Atlassian JIRA
(v6.1.5#6160)