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https://issues.apache.org/jira/browse/HADOOP-1788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12533890
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Christian Kunz commented on HADOOP-1788:
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I applied the patch, but do not see any difference when running strace against
the C++ application or the java side:
c++:
..
read(29, "\7\0\6\34\30\0\0\0\201R\214\307y\3\363~\364\344\321\277"..., 1024) =
1024
..
gettimeofday({1192048782, 69558}, {0, 0}) = 0
..
write(29, "%\316\tU\351r2V\302\37\0\0\0\0\0002\30\24\0\0\0\364\343"..., 1024) =
1024
..
java:
...
recv(234, "2", 1, 0) = 1
recv(234, "\30", 1, 0) = 1
recv(234, "\24\0\0\0\253\335\263\314\217|5\236\226\tC\34v\1~%\0\0"..., 24, 0) =
24
recv(234, "\0", 1, 0) = 1
recv(234, "2", 1, 0) = 1
recv(234, "\30", 1, 0) = 1
recv(234, "\24\0\0\0\253\335\263\322\'\30ivA\213\26\242K5m\312\0\0"..., 24, 0)
= 24
recv(234, "\0", 1, 0) = 1
...
> Increase the buffer size of pipes from 1k to 128k
> -------------------------------------------------
>
> Key: HADOOP-1788
> URL: https://issues.apache.org/jira/browse/HADOOP-1788
> Project: Hadoop
> Issue Type: Bug
> Components: pipes
> Reporter: Owen O'Malley
> Assignee: Amareshwari Sri Ramadasu
> Attachments: patch-1788.txt
>
>
> Currently pipes applications use 1k writes to the socket and it should be
> larger to increase throughput.
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