Hadoop Linux Native 编译说明

首先说明一下,如果要使用Linux Native的话,Hadoop是已经自带了哦

然后,如果要编译的话,建议直接从Hadoop源码按官方的说明进行编译,不要像我这样自己搞。。。

如果你喜欢折腾,请继续看:

1、按源码架构拷贝下面的文件及文件夹

hadoop-2.5.2-src\hadoop-common-project\hadoop-common\src\main\native
hadoop-2.5.2-src\hadoop-common-project\hadoop-common\src\CMakeLists.txt
hadoop-2.5.2-src\hadoop-common-project\hadoop-common\src\config.h.cmake
hadoop-2.5.2-src\hadoop-common-project\hadoop-common\src\JNIFlags.cmake
hadoop-2.5.2-src\hadoop-hdfs-project\hadoop-hdfs\src\main\native
hadoop-2.5.2-src\hadoop-hdfs-project\hadoop-hdfs\src\CMakeLists.txt(可能需要调整一下依赖文件JNIFlags.cmake的相对路径)
hadoop-2.5.2-src\hadoop-hdfs-project\hadoop-hdfs\src\config.h.cmake

2、编译libhadoop
2.1、检查并安装以来关系

#需要gcc、make、jdk,这些一般大家都有了
#需要zlib
apt-get install zlib1g-dev
#需要cmake
apt-get install cmake

2.2、用cmake生成Makefile

cmake ./src/ -DGENERATED_JAVAH=~/Build/hadoop-2.5.2-src/build/hadoop-common-project/hadoop-common/native/javah -DJVM_ARCH_DATA_MODEL=64 -DREQUIRE_BZIP2=false -DREQUIRE_SNAPPY=false

2.3、用javah生成头文件
需要三个jar包,hadoop-common,hadoop-annotations,guava

javah org.apache.hadoop.io.compress.lz4.Lz4Compressor
javah org.apache.hadoop.io.compress.lz4.Lz4Decompressor
javah org.apache.hadoop.io.compress.zlib.ZlibCompressor
javah org.apache.hadoop.io.compress.zlib.ZlibDecompressor
javah org.apache.hadoop.io.nativeio.NativeIO 
javah org.apache.hadoop.io.nativeio.SharedFileDescriptorFactory
javah org.apache.hadoop.net.unix.DomainSocket
javah org.apache.hadoop.net.unix.DomainSocketWatcher
javah org.apache.hadoop.security.JniBasedUnixGroupsMapping
javah org.apache.hadoop.security.JniBasedUnixNetgroupsMapping
javah org.apache.hadoop.util.NativeCrc32

将生成的文件,拷贝到对应的c文件夹中

2.3、生成

make

3、编译libhdfs
3.1、用cmake生成Makefile

cmake ./src/ -DGENERATED_JAVAH=~/Build/hadoop-2.5.2-src/build/hadoop-common-project/hadoop-common/native/javah -DJVM_ARCH_DATA_MODEL=64 -DREQUIRE_LIBWEBHDFS=false -DREQUIRE_FUSE=false

3.2、生成

make

4、将生成的文件拷贝到HADOOP_HOME/lib/mynative

5、修改/etc/profile,增加下面一行

export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib/mynative"

6、刷新配置

source /etc/profile

搞定!

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