Tao Li created HADOOP-13849:
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Summary: Bzip2 java-builtin and system-native have almost the same
compress speed
Key: HADOOP-13849
URL: https://issues.apache.org/jira/browse/HADOOP-13849
Project: Hadoop Common
Issue Type: Bug
Components: common
Affects Versions: 2.6.0
Environment: os version: redhat6
hadoop version: 2.6.0
native bzip2 version: bzip2-devel-1.0.5-7.el6_0.x86_64
Reporter: Tao Li
I tested bzip2 java-builtin and system-native compression, and I found the
compress speed is almost the same. (I think the system-native should have
better compress speed than java-builtin)
My test case:
input: 2.7GB text file without compression
bzip2 java-builtin compress: 457MB, 12min 4sec
bzip2 system-native compress: 457MB, 12min 19sec
My MapReduce Config:
conf.set("mapreduce.fileoutputcommitter.marksuccessfuljobs", "false");
conf.set("mapreduce.output.fileoutputformat.compress", "true");
conf.set("mapreduce.output.fileoutputformat.compress.type", "BLOCK");
conf.set("mapreduce.output.fileoutputformat.compress.codec",
"org.apache.hadoop.io.compress.BZip2Codec");
conf.set("io.compression.codec.bzip2.library", "java-builtin"); // for
java-builtin
conf.set("io.compression.codec.bzip2.library", "system-native"); // for
system-native
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