Hadoop 源码编译支持 snappy 压缩
1.下载安装包
centos7x64
jdk1.8.0_181
apache-maven-3.3.9
protobuf-2.5.0.tar.gz
apache-ant-1.9.13-bin.zip
hadoop-2.7.4-src.tar.gz
snappy-1.1.3.tar.gz
2.提前配置环境变量
vim /etc/profile
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BASE_DIR=/opt/softwares
export BASE_DIR
export JAVA_HOME=$BASE_DIR/jdk1.8.0_181
export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/sbin
MAVEN_HOME=$BASE_DIR/apache-maven-3.3.9
MAVEN_OPTS="-Xms1024m -Xmx2048m -Xss36m -XX:MaxPermSize=512m"
PATH=$PATH:$MAVEN_HOME/bin
export MAVEN_HOME MAVEN_OPTS PATH
ANT_HOME=$BASE_DIR/apache-ant-1.9.13
PATH=$PATH:$ANT_HOME/bin
export ANT_HOME PATH
LD_LIBRARY_PATH=$BASE_DIR/protobuf-2.5.0
PATH=$PATH:$LD_LIBRARY_PATH/bin
export LD_LIBRARY_PATH PATH
SCALA_HOME=$BASE_DIR/scala-2.12.1
PATH=$PATH:$SCALA_HOME/bin
export SCALA_HOME PATH
--------------------------------------------------
source /etc/profile
3.编译环境准备
# 宿主机与虚拟机传递文件工具
yum install -y nmap-ncat
# 发送端
nc maven 4000 < hadoop-2.7.4-src.tar.gz
# 接受端 先关闭防火墙
systemctl stop iptables
systemctl stop firewalld
chkconfig disable chkconfig
chkconfig disable firewalld
nc -l 4000 > hadoop-2.7.4-src.tar.gz
# 安装编译环境 gcc make ...
yum install glibc-headers gcc-c++ make cmake openssl-devel ncurses-devel
# 安装 ant 打包工具编译环境
tar -zxvf apache-ant-1.9.13-bin.zip -C /opt/softwares
# 已经提前配置好环境变量，直接检测
[root@maven target]# ant -v
Apache Ant(TM) version 1.9.13 compiled on July 10 2018 《》
Trying the default build file: build.xml
Buildfile: build.xml does not exist!
Build failed
# 安装protobuf编译环境
tar -zxvf protobuf-2.5.0.tar.gz -C /opt/softwares
cd /opt/softwares/protobuf-2.5.0
./configure
make && make install
[root@maven target]# protoc --version
libprotoc 2.5.0
# 安装 snappy lib 库
tar -zxvf snappy-1.1.3.tar.gz -C /opt/softwares
cd /opt/softwares/snappy-1.1.3
./configure
make && make install
[root@maven target]# ls /usr/local/lib | grep snappy
libsnappy.a
libsnappy.la
libsnappy.so
libsnappy.so.1
libsnappy.so.1.3.0
# maven 配置镜像仓库
# 解压maven官网基础镜像到本地
tar -zxvf repository.tat.gz /opt/softwares/apache-maven-3.3.9
# 配置本地仓库和远程镜像仓库
vim /opt/softwares/apache-maven-3.3.9/conf/settings.xml
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...
...
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# 检验
[root@maven target]# mvn -v
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=512m; support was removed in 8.0
Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-11T00:41:47+08:00)
Maven home: /opt/softwares/apache-maven-3.3.9
Java version: 1.8.0_181, vendor: Oracle Corporation
Java home: /opt/softwares/jdk1.8.0_181/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.10.0-862.11.6.el7.x86_64", arch: "amd64", family: "unix"
4.支持snappy 压缩功能 hadoop 源码编译
tar -zxvf hadoop-2.7.4-src.tar.gz /opt/packages
cd /opt/packages/hadoop-2.7.4-src
mvn clean package -DskipTests -Pdist,native -Dtar -Dsnappy.lib=/usr/local/lib -Dbundle.snappy
cd hadoop-dist/target
[root@maven target]# ll
total 584388
drwxr-xr-x. 2 root root 28 Sep 29 14:11 antrun
drwxr-xr-x. 3 root root 22 Sep 29 14:11 classes
-rw-r--r--. 1 root root 1870 Sep 29 14:11 dist-layout-stitching.sh
-rw-r--r--. 1 root root 643 Sep 29 14:11 dist-tar-stitching.sh
drwxr-xr-x. 9 root root 149 Sep 29 14:11 hadoop-2.7.4 <<< 已经解压了
-rw-r--r--. 1 root root 198937436 Sep 29 14:11 hadoop-2.7.4.tar.gz. <<< 可直接使用
-rw-r--r--. 1 root root 26520 Sep 29 14:11 hadoop-dist-2.7.4.jar.
-rw-r--r--. 1 root root 399385702 Sep 29 14:11 hadoop-dist-2.7.4-javadoc.jar
-rw-r--r--. 1 root root 24050 Sep 29 14:11 hadoop-dist-2.7.4-sources.jar
-rw-r--r--. 1 root root 24050 Sep 29 14:11 hadoop-dist-2.7.4-test-sources.jar
drwxr-xr-x. 2 root root 51 Sep 29 14:11 javadoc-bundle-options
drwxr-xr-x. 2 root root 28 Sep 29 14:11 maven-archiver
drwxr-xr-x. 3 root root 22 Sep 29 14:11 maven-shared-archive-resources
drwxr-xr-x. 3 root root 22 Sep 29 14:11 test-classes
drwxr-xr-x. 2 root root 6 Sep 29 14:11 test-dir
ls lib/native
libhadoop.a libhadooppipes.a libhadoop.so libhadoop.so.1.0.0 libhadooputils.a libhdfs.a libhdfs.so libhdfs.so.0.0.0 libsnappy.a libsnappy.la libsnappy.so libsnappy.so.1 libsnappy.so.1.3.0
#
scp -r lib/native master:/opt/softwares/hadoop-2.7.4/lib/
5.开启hadoop集群压缩功能
cd /opt/softwares/hadoop-2.7.4
# 集群分发
xsync lib/native
# 开启压缩配置
vim etc/hadoop/mapred-site.xml
----------------------------------------
----------------------------------------
# 刷新 或 重启
hdfs dfsadmin -refresh
yarn rmadmin -refresh
# 启动 hive 或 直接使用配置好的别名 hive_on
hive --service metastore >> $HIVE_HOME/log/metastore.log 2>&1 &
hive --service hiveserver2 >> $HIVE_HOME/log/hiveserver2.log 2>&1 &
# vim /opt/softwares/data.txt
----------------------------------------
tom 12
jack 13
lily 13
----------------------------------------
# hive
hive (test_db)>
# 建库
create database if not exists test_db location '/usr/hive/warehouse/test_db';
use test_db;
# 创建最简单外部表
create external table stu(
name string,
age int
)row format delimited fields terminated by '\t';
# 创建 orc（列式存储）格式表
create external table stu_orc(
name string,
age int
) row format delimited fields terminated by '\t'
stored as orc tblproperties('orc.compress'='NONE');
# 创建基于snappy 格式压缩（IO）,ORC格式存储 （CPU）的外部表
create external table stu_orc_snappy(
name string,
age int
) row format delimited fields terminated by '\t'
stored as orc tblproperties('orc.compress'='SNAPPY');
# 从本地装在数据到hive表 （不发生MR）
load data inpath '/opt/softwares/data.txt' into table stu;
hive (test_db)> select * from stu;
OK
stu.name stu.age
tom 12
jack 13
lily 13
Time taken: 0.048 seconds, Fetched: 3 row(s)
# 发生了MR,且数据组织格式已经变化
insert into stu_orc select * from stu;
hive (test_db)> select * from stu_orc;
OK
stu_orc.name stu_orc.age
tom 12
jack 13
lily 13
Time taken: 0.066 seconds, Fetched: 3 row(s)
# 发生 MR且执行了压缩，数据以orc格式进行组织
insert into stu_orc_snappy select * frm stu;
hive (test_db)> select * from stu_orc_snappy;
OK
stu_orc_snappy.name stu_orc_snappy.age
tom 12
jack 13
lily 13
Time taken: 0.057 seconds, Fetched: 3 row(s)
# 空间比较 （注：样本数据太小，压缩比不能说明问题）
[root@master ~]# hdfs dfs -ls /usr/hive/warehouse/test_db/stu/*
-rwxrwxrwx 1 root supergroup 23 2018-09-24 00:08 /usr/hive/warehouse/test_db/stu/data.txt
[root@master ~]# hdfs dfs -ls /usr/hive/warehouse/test_db/stu_orc/*
-rwxrwxrwx 1 root supergroup 292 2018-09-24 00:12 /usr/hive/warehouse/test_db/stu_orc/000000_0
[root@master ~]# hdfs dfs -ls /usr/hive/warehouse/test_db/stu_orc_snappy/*
-rwxrwxrwx 1 root supergroup 322 2018-09-24 00:17 /usr/hive/warehouse/test_db/stu_orc_snappy/000000_0