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Posted to hdfs-issues@hadoop.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2011/02/19 19:59:38 UTC
[jira] Commented: (HDFS-941) Datanode xceiver protocol should allow
reuse of a connection
[ https://issues.apache.org/jira/browse/HDFS-941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12996836#comment-12996836 ]
Hadoop QA commented on HDFS-941:
--------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12443322/HDFS-941-4.patch
against trunk revision 1072023.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 15 new or modified tests.
-1 patch. The patch command could not apply the patch.
Console output: https://hudson.apache.org/hudson/job/PreCommit-HDFS-Build/199//console
This message is automatically generated.
> Datanode xceiver protocol should allow reuse of a connection
> ------------------------------------------------------------
>
> Key: HDFS-941
> URL: https://issues.apache.org/jira/browse/HDFS-941
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: data-node, hdfs client
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Assignee: bc Wong
> Attachments: HDFS-941-1.patch, HDFS-941-2.patch, HDFS-941-3.patch, HDFS-941-3.patch, HDFS-941-4.patch
>
>
> Right now each connection into the datanode xceiver only processes one operation.
> In the case that an operation leaves the stream in a well-defined state (eg a client reads to the end of a block successfully) the same connection could be reused for a second operation. This should improve random read performance significantly.
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