配置Hadoop2.7.2和Hbase1.1.5支持Snappy解压压缩库

一.Hadoop支持Snappy

1.重新编译Hadoop 2.7.2源代码,使其支持Snappy解压压缩库  http://blog.itpub.net/30089851/viewspace-2120631/

2.查看libsnappy.so.1.2.0

[root@sht-sgmhadoopnn-01 ~]# ll $HADOOP_HOME/lib/native/

total 4880

-rw-r--r-- 1 root root 1211196 Jun 21 19:11 libhadoop.a

-rw-r--r-- 1 root root 1485756 Jun 21 19:12 libhadooppipes.a

lrwxrwxrwx 1 root root      18 Jun 21 19:45 libhadoop.so -> libhadoop.so.1.0.0

-rwxr-xr-x 1 root root  717060 Jun 21 19:11 libhadoop.so.1.0.0

-rw-r--r-- 1 root root  582128 Jun 21 19:12 libhadooputils.a

-rw-r--r-- 1 root root  365052 Jun 21 19:11 libhdfs.a

lrwxrwxrwx 1 root root      16 Jun 21 19:45 libhdfs.so -> libhdfs.so.0.0.0

-rwxr-xr-x 1 root root  229289 Jun 21 19:11 libhdfs.so.0.0.0

-rw-r--r-- 1 root root  233538 Jun 21 19:11 libsnappy.a

-rwxr-xr-x 1 root root     953 Jun 21 19:11 libsnappy.la

lrwxrwxrwx 1 root root      18 Jun 21 19:45 libsnappy.so -> libsnappy.so.1.2.0

lrwxrwxrwx 1 root root      18 Jun 21 19:45 libsnappy.so.1 -> libsnappy.so.1.2.0

-rwxr-xr-x 1 root root  147726 Jun 21 19:11 libsnappy.so.1.2.0 

 [root@sht-sgmhadoopnn-01 ~]#
###假如集群已经安装好

3.修改$HADOOP_HOME/etc/hadoop/hadoop-env.sh,添加

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

############会解决Warn:” Unable to load native-hadoop library ”################################################

 [root@sht-sgmhadoopnn-01 ~]# hadoop fs -ls /

  16/06/21 15:08:24 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using     builtin-java classes where applicable

##################################################################################################

4.修改$HADOOP_HOME/etc/hadoop/core-site.xml

5.修改 $HADOOP_HOME/etc/hadoop/mapred-site.xml 中有关压缩属性,测试snappy

6.新增$HADOOP_HOME/etc/hadoop/yarn-site.xml(是否启用日志聚集功能、yarn日志服务的地址、配置yarn的memory和cpu)

7.将hadoop-env.sh, core-site.xml, mapred-site.xml,yarn-site.xml 同步到集群其他节点

8.重启Hadoop集群

9.验证1: hadoop checknative

[root@sht-sgmhadoopnn-01 ~]# hadoop checknative

16/06/25 12:58:13 WARN bzip2.Bzip2Factory: Failed to load/initialize native-bzip2 library system-native, will use pure-Java version

16/06/25 12:58:13 INFO zlib.ZlibFactory: Successfully loaded & initialized native-zlib library

Native library checking:

hadoop:  true /hadoop/hadoop-2.7.2/lib/native/libhadoop.so.1.0.0

zlib:    true /usr/local/lib/libz.so.1

snappy:  true /hadoop/hadoop-2.7.2/lib/native/libsnappy.so.1

lz4:     true revision:99

bzip2:   false

openssl: true /usr/lib64/libcrypto.so

[root@sht-sgmhadoopnn-01 ~]#

####支持本地native,支持snappy

10.验证2

[root@sht-sgmhadoopnn-01 ~]# vi test.log

a

c d

c d d d a

1 2

a

[root@sht-sgmhadoopnn-01 ~]# hadoop fs -mkdir /input

[root@sht-sgmhadoopnn-01 ~]#hadoop fs -put test.log /input/

[root@sht-sgmhadoopnn-01 ~]#hadoop jar /hadoop/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-*.jar wordcount /input /output1

为了验证是否成功，往