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Posted to issues@hbase.apache.org by "Andrew Kyle Purtell (Jira)" <ji...@apache.org> on 2022/06/15 21:08:00 UTC

[jira] [Closed] (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 ]

Andrew Kyle Purtell closed HBASE-7408.
--------------------------------------
    Assignee:     (was: 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
>            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.



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