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Date: Mon, 17 Sep 2012 17:16:08 +1100 (NCT)
From: "LiuLei (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <593120065.86633.1347862568237.JavaMail.jiratomcat@arcas>
In-Reply-To: <1402204225.86299.1347849667773.JavaMail.jiratomcat@arcas>
Subject: [jira] [Commented] (HBASE-6798) HDFS always read checksum form meta
 file
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    [ https://issues.apache.org/jira/browse/HBASE-6798?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13456786#comment-13456786 ] 

LiuLei commented on HBASE-6798:
-------------------------------

yes, Hadoop1.0.3 also has the problem.
                
> HDFS always read checksum form meta file
> ----------------------------------------
>
>                 Key: HBASE-6798
>                 URL: https://issues.apache.org/jira/browse/HBASE-6798
>             Project: HBase
>          Issue Type: Bug
>          Components: performance
>    Affects Versions: 0.94.0, 0.94.1
>            Reporter: LiuLei
>
> I use hbase0.941 and hadoop-0.20.2-cdh3u5 version.
> The HBase support checksums in HBase block cache in HBASE-5074 jira.
> The  HBase  support checksums for decrease the iops of  HDFS, so that HDFS
> dont't need to read the checksum from meta file of block file.
> But in hadoop-0.20.2-cdh3u5 version, BlockSender still read the metadata file even if the
>  hbase.regionserver.checksum.verify property is ture.

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