HBase配置和使用
整体实现框架
图1
以下几个为组成部件
21892 HMaster
22028 HRegionServer
21553 QuorumPeerMain
2366 NameNode
2539 DataNode
配置
1.配置 hbase-env.sh
# JAVA_HOME
export JAVA_HOME=/opt/softwares/jdk1.8.0_141
# 使用自己的 Zookeeper
export HBASE_MANAGES_ZK=false
2.配置 hbase-site.xml(Example Distributed HBase Cluster)
<configuration>
<!--根目录，在HDFS的路径-->
<property>
<name>hbase.rootdir</name>
<value>hdfs://cen-ubuntu.cenzhongman.com:8020/hbase</value>
</property>
<!--是否分布式-->
<property>
<name>hbase.cluster.distributed</name>
<value>true</value>
</property>
<!--所有节点,逗号隔开-->
<property>
<name>hbase.zookeeper.quorum</name>
<value>cen-ubuntu.cenzhongman.com</value>
</property>
</configuration>
3.配置 regionservers 类似(Slaves)
cen-ubuntu
启动
1.启动 Zookeper server
$ bin/zkServer.sh start
2.启动 HBase
$ bin/start-hbase.sh
3.Web 查看
$ hostname:60010
使用
基础
1.Connect to HBase.
Connect to your running instance of HBase using the hbase shell command, located in the bin/ directory of your HBase install. In this example, some usage and version information that is printed when you start HBase Shell has been omitted. The HBase Shell prompt ends with a > character.
$ ./bin/hbase shell
hbase(main):001:0>
2.Display HBase Shell Help Text.
Type help and press Enter, to display some basic usage information for HBase Shell, as well as several example commands. Notice that table names, rows, columns all must be enclosed in quote characters.
hbase(main):001:0> help
hbase(main):001:0> help 'create'
3.List Information About your Table
Use the list command to
hbase(main):002:0> list 'test'
TABLE
test
1 row(s) in 0.0180 seconds
=> ["test"]
增
1.Create a table.
Use the create command to create a new table. You must specify the table name and the ColumnFamily name.
hbase(main):001:0> create 'test', 'cf'
0 row(s) in 0.4170 seconds
=> Hbase::Table - test
2.Put data into your table.
To put data into your table, use the put command.
# 表名 RowKey 列簇名[:列名] 值 [timeStamp]可指定，默认为时间戳
hbase(main):003:0> put 'test', 'row1', 'cf:a', 'value1'
0 row(s) in 0.0850 seconds
hbase(main):004:0> put 'test', 'row2', 'cf:b', 'value2'
0 row(s) in 0.0110 seconds
hbase(main):005:0> put 'test', 'row3', 'cf:c', 'value3'
0 row(s) in 0.0100 seconds
查询(三种方式)
1.Scan the table for all data at once.全表扫描
One of the ways to get data from HBase is to scan. Use the scan command to scan the table for data. You can limit your scan, but for now, all data is fetched.
hbase(main):006:0> scan 'test'
ROW COLUMN+CELL
row1 column=cf:a, timestamp=1421762485768, value=value1
row2 column=cf:b, timestamp=1421762491785, value=value2
row3 column=cf:c, timestamp=1421762496210, value=value3
3 row(s) in 0.0230 seconds
2.Get a single row of data.单行查询(最快速)
To get a single row of data at a time, use the get command.
# 表名 RowKey [列簇名[:列名]] [timeStamp]
hbase(main):007:0> get 'test', 'row1'
COLUMN CELL
cf:a timestamp=1421762485768, value=value1
1 row(s) in 0.0350 seconds
3.范围查询
给定条件按范围进行列查询
hbase(main):007:0> scan 'test' ,{STARTROW => 'xyz'}
删
1.Disable a table.
If you want to delete a table or change its settings, as well as in some other situations, you need to disable the table first, using the disable command. You can re-enable it using the enable command.
hbase(main):008:0> disable 'test'
0 row(s) in 1.1820 seconds
hbase(main):009:0> enable 'test'
0 row(s) in 0.1770 seconds
Disable the table again if you tested the enable command above:
hbase(main):010:0> disable 'test'
0 row(s) in 1.1820 seconds
2.Drop the table.
To drop (delete) a table, use the drop command.
hbase(main):011:0> drop 'test'
0 row(s) in 0.1370 seconds
3.Delete Data
To Delect data from table.
# 删除一行中一列数据(不能根据列簇所属的列的数据，但是能删除列簇的自己数据)
hbase(main):011:0> delete 't1','r1','c1',['ts1']
# 删除整行数据
hbase(main):011:0> deleteall 't1','r1'
Exit the HBase Shell.
To exit the HBase Shell and disconnect from your cluster, use the quit command. HBase is still running in the background.
hbase(main):007:0> quit/exit
Stop HBase
In the same way that the bin/start-hbase.sh script is provided to conveniently start all HBase daemons, the bin/stop-hbase.sh script stops them.
$ ./bin/stop-hbase.sh
stopping hbase....................
