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From ni...@apache.org
Subject svn commit: r615377 - in /hadoop/core/trunk: CHANGES.txt conf/hadoop-default.xml
Date Fri, 25 Jan 2008 22:14:41 GMT
Author: nigel
Date: Fri Jan 25 14:14:39 2008
New Revision: 615377

URL: http://svn.apache.org/viewvc?rev=615377&view=rev
Log:
HADOOP 2705. Increase default io.file.buffer.size from 4Kb to 32Kb. Deployments that are short
on RAM might want to use the prior value. Contributed by Chris Douglas.

Modified:
    hadoop/core/trunk/CHANGES.txt
    hadoop/core/trunk/conf/hadoop-default.xml

Modified: hadoop/core/trunk/CHANGES.txt
URL: http://svn.apache.org/viewvc/hadoop/core/trunk/CHANGES.txt?rev=615377&r1=615376&r2=615377&view=diff
==============================================================================
--- hadoop/core/trunk/CHANGES.txt (original)
+++ hadoop/core/trunk/CHANGES.txt Fri Jan 25 14:14:39 2008
@@ -65,6 +65,10 @@
     from cluster A (compiled with this patch) to cluster B (compiled 
     with previous versions). (Tsz Wo (Nicholas), SZE via dhruba)
 
+    HADOOP 2705. Increase default io.file.buffer.size from 4Kb to 32Kb.
+    Deployments that are short on RAM might want to use the prior value.
+    (Chris Douglas via nigel)
+
   NEW FEATURES
 
     HADOOP-1857.  Ability to run a script when a task fails to capture stack

Modified: hadoop/core/trunk/conf/hadoop-default.xml
URL: http://svn.apache.org/viewvc/hadoop/core/trunk/conf/hadoop-default.xml?rev=615377&r1=615376&r2=615377&view=diff
==============================================================================
--- hadoop/core/trunk/conf/hadoop-default.xml (original)
+++ hadoop/core/trunk/conf/hadoop-default.xml Fri Jan 25 14:14:39 2008
@@ -62,7 +62,7 @@
 
 <property>
   <name>io.file.buffer.size</name>
-  <value>4096</value>
+  <value>32768</value>
   <description>The size of buffer for use in sequence files.
   The size of this buffer should probably be a multiple of hardware
   page size (4096 on Intel x86), and it determines how much data is



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