Mailing-List: contact common-issues-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Date: Wed, 10 May 2017 05:08:04 +0000 (UTC)
From: "Masatake Iwasaki (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <JIRA.13069897.1494229241000.172623.1494392884424@Atlassian.JIRA>
In-Reply-To: <JIRA.13069897.1494229241000@Atlassian.JIRA>
References: <JIRA.13069897.1494229241000@Atlassian.JIRA> <JIRA.13069897.1494229241950@jira-lw-us.apache.org>
Subject: [jira] [Updated] (HADOOP-14405) Fix performance regression due to
 incorrect use of DataChecksum
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
archived-at: Wed, 10 May 2017 05:08:09 -0000


     [ https://issues.apache.org/jira/browse/HADOOP-14405?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Masatake Iwasaki updated HADOOP-14405:
--------------------------------------
    Summary: Fix performance regression due to incorrect use of DataChecksum  (was: Fix:Performance regression due to incorrect use of DataChecksum)

> Fix performance regression due to incorrect use of DataChecksum
> ---------------------------------------------------------------
>
>                 Key: HADOOP-14405
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14405
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: native, performance
>    Affects Versions: 2.8.0, 3.0.0-alpha1
>            Reporter: LiXin Ge
>            Assignee: LiXin Ge
>         Attachments: HDFS-11765.patch
>
>
> Recently I have upgraded my Hadoop version from 2.6 to 3.0, and I find that the write performance decreased by 13%. After some days comparative analysis, It's seems introduced by HADOOP-10865. 
> Since James Thomas have done the work that native checksum can run against byte[] arrays instead of just against byte buffers, we may use native method preferential because it runs faster than others.
> [~szetszwo] and [~iwasakims] could you take a look at this to see if  it make bad effect on your benchmark test? [~tlipcon] could you help to see if I have make mistakes in this patch?
> thanks!


--
This message was sent by Atlassian JIRA
(v6.3.15#6346)

---------------------------------------------------------------------
To unsubscribe, e-mail: common-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: common-issues-help@hadoop.apache.org