[
https://issues.apache.org/jira/browse/HDFS-7380?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Adam Fuchs updated HDFS-7380:
-----------------------------
Attachment: BenchmarkWrites.java
> unsteady and slow performance when writing to file with block size >2GB
> -----------------------------------------------------------------------
>
> Key: HDFS-7380
> URL: https://issues.apache.org/jira/browse/HDFS-7380
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.4.0
> Reporter: Adam Fuchs
> Attachments: BenchmarkWrites.java
>
>
> Appending to a large file with block size > 2GB can lead to periods of really
> poor performance (4X slower than optimal). I found this issue when looking at
> Accmulo write performance in ACCUMULO-3303. I wrote a small test application
> to isolate this performance down to some basic API calls (to be attached). A
> description of the execution can be found here:
> https://issues.apache.org/jira/browse/ACCUMULO-3303?focusedCommentId=14202830&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14202830
> The specific hadoop version was as follows:
> {code}
> [root@n1 ~]# hadoop version
> Hadoop 2.4.0.2.1.2.0-402
> Subversion g...@github.com:hortonworks/hadoop.git -r
> 9e5db004df1a751e93aa89b42956c5325f3a4482
> Compiled by jenkins on 2014-04-27T22:28Z
> Compiled with protoc 2.5.0
> From source with checksum 9e788148daa5dd7934eb468e57e037b5
> This command was run using /usr/lib/hadoop/hadoop-common-2.4.0.2.1.2.0-402.jar
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
