Hbase学习1_CentOS6.5下Hbase1.1.2安装

Hbase

一、安装Hbase

在两台虚拟机Master和Slave1上安装Hbase

所需条件：Hadoop和Zookeeper集群安装完成

Root用户下操作

1、解压安装

将hbase-1.1.2-bin.tar.gz拿U盘复制到/home/hadoop目录下

在/home/hadoop目录下，解压安装

tar -zxvf hbase-1.1.2-bin.tar.gz -C/usr/local

软件下载地址：

http://www.apache.org/dyn/closer.cgi/hbase/

 

二、配置Hbase

1、修改conf/hbase-env.sh

进行以下修改：

exportJAVA_HOME=/usr/local/java/jdk1.8.0_65

exportHBASE_LOG_DIR=/usr/local/hbase-1.1.2/logs

export HBASE_MANAGES_ZK=true（目的是打开zookeeper管理）

2、修改conf/hbase-site.sh

内容修改如下：

<configuration>

<property>

<name>hbase.rootdir</name>

<value>hdfs://Master:9000/hbase</value>

</property>

<property>

<name>hbase.cluster.distributed</name>

<value>true</value>

</property>

 

<property>

<name>hbase.master</name>

<value>Master:60000</value>

</property>

<property>

<name>hbase.zookeeper.quorum</name>

<value>Master,Slave1</value>

</property>

<property>

<name>hbase.zookeeper.property.dataDir</name>

<value>/usr/local/zookeeper/zkdata</value>

</property>

</configuration>

备注：

hbase.rootdir  设置hbase在hdfs上的目录，主机名为hdfs的namenode节点所在的主机

hbase.cluster.distributed  设置为true，表明是完全分布式的hbase集群

hbase.master  设置hbase的master主机名和端口

hbase.zookeeper.quorum  设置zookeeper的主机，建议使用单数

hbase.zookeeper.property.dataDir  设置zookeeper的数据路径

hbase-1.1.2目录下，建立logs文件

mkdir logs

3、修改regionservers

将内容修改为：

Slave1

即Slave的名字

4、修改Hadoop hdfs-site.xml

注意其它的datanode也要进行修改

修改内容如下：

<property>

<name>dfs.datanode.max.xcievers</name>

<value>4096</value>

</property>

原因：

该参数限制了datanode所允许同时执行的发送和接受任务的数量，缺省为256，hadoop-defaults.xml中通常不设置这个参数。这个限制看来实际有些偏小，高负载下，DFSClient在put数据的时候会报could not read from stream的Exception

5、拷贝到其它主机

scp -r /usr/local/ hbase-1.1.2 Slave1:/usr/local

6、修改权限

在Master和Slave1上操作

chown -R hadoop:hadoop hbase-1.1.2

 

三、运行Hbase

1、启动

bin/hbase-1.1.2

2、脚本操作

启动

bin/hbase shell

用list命令来看一下hbase中有哪些表

list

创建一张表

create 'user_info','name'

往表中插入一条数据

put 'user_info','1','name:','Tom'

查询是否表中存在数据

scan 'user_info'

删除hbase表时，需要先disable '表名称'，然后在drop '表名称'

disable 'user_info'

drop 'user_info'

退出

exit

操作过程：

[hadoop@Master bin]$ ./start-hbase.sh Slave1: starting zookeeper, logging to /usr/local/hbase-1.1.2/logs/hbase-hadoop-zookeeper-Slave1.outMaster: starting zookeeper, logging to /usr/local/hbase-1.1.2/logs/hbase-hadoop-zookeeper-Master.outstarting master, logging to /usr/local/hbase-1.1.2/logs/hbase-hadoop-master-Master.outSlave1: starting regionserver, logging to /usr/local/hbase-1.1.2/logs/hbase-hadoop-regionserver-Slave1.outSlave1: Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=128m; support was removed in 8.0Slave1: Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=128m; support was removed in 8.0[hadoop@Master bin]$ ./hbase shellSLF4J: Class path contains multiple SLF4J bindings.SLF4J: Found binding in [jar:file:/usr/local/hbase-1.1.2/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]SLF4J: Found binding in [jar:file:/usr/local/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]2016-01-25 23:06:21,475 WARN  [main] util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicableHBase Shell; enter 'help<RETURN>' for list of supported commands.Type "exit<RETURN>" to leave the HBase ShellVersion 1.1.2, rcc2b70cf03e3378800661ec5cab11eb43fafe0fc, Wed Aug 26 20:11:27 PDT 2015hbase(main):001:0> listTABLE                                                                           0 row(s) in 7.8750 seconds=> []hbase(main):002:0> create 'user_info','name'0 row(s) in 8.5030 seconds=> Hbase::Table - user_infohbase(main):003:0> put 'user_info','1','name:','Tom'0 row(s) in 2.0010 secondshbase(main):004:0> scan 'user_info'ROW                   COLUMN+CELL                                                1                    column=name:, timestamp=1453792722909, value=Tom          1 row(s) in 0.3710 secondshbase(main):005:0> listTABLE                                                                           user_info                                                                       1 row(s) in 0.0730 seconds=> ["user_info"]hbase(main):006:0> drop 'user_info'ERROR: Table user_info is enabled. Disable it first.Here is some help for this command:Drop the named table. Table must first be disabled:  hbase> drop 't1'  hbase> drop 'ns1:t1'hbase(main):007:0> listTABLE                                                                           user_info                                                                       1 row(s) in 0.0360 seconds=> ["user_info"]hbase(main):008:0> disable 'user_info'0 row(s) in 2.6240 secondshbase(main):009:0> drop 'user_info'0 row(s) in 2.8240 secondshbase(main):010:0> listTABLE                                                                           0 row(s) in 0.0230 seconds=> []hbase(main):011:0> exit[hadoop@Master bin]$