HBASE比較特殊

配置：需要叢集

1. 解壓 hbase 安裝包

[[email protected] sxt]# tar xf hbase-0.98.12.1-hadoop2-bin.tar.gz

2. 配置環境變數

[[email protected] sxt]#

vi + /etc/profile export JAVA_HOME=/usr/java/jdk1.7.0_67 export PATH=$PATH:$JAVA_HOME/bin export HADOOP_PREFIX=/opt/sxt/hadoop-2.6.5 export PATH=$PATH:$HADOOP_PREFIX/bin:$HADOOP_PREFIX/sbin export ZOOKEEPER_PREFIX=/opt/sxt/zookeeper-3.4.6 export PATH=$PATH:$ZOOKEEPER_PREFIX/bin export HBASE_HOME=/opt/sxt/hbase-0.98.12.1 export PATH=$PATH:$HBASE_HOME/bin

[[email protected] sxt]# . /etc/profile

3. hbase-env.sh 中配置 JAVA_HOME[[email protected] sxt]# cd hbase-0.98.12.1/conf/ [[email protected] conf]# vi hbase-env.sh export JAVA_HOME=/usr/java/jdk1.7.0_67

4. 修改 hbase-site.xml 配置檔案

[[email protected] conf]# vi hbase-site.xml hbase.rootdir file:///var/hbase/local hbase.zookeeper.property.dataDir /var/hbase/local/zookeeper

5. 啟動 hbase [[email protected] conf]# start-hbase.sh

6. 進入 hbase 命令列

[[email protected] conf]# hbase shell

命令 hbase 刪除已經打好的命令：ctrl+backspace

hbase(main):002:0> version

0.98.12.1-hadoop2, rb00ec5da604d64a0bdc7d92452b1e0559f0f5d73, Sun May 17 12:55:03 PDT 2015

hbase(main):003:0> whoami

SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/opt/sxt/hbase-0.98.12.1/lib/slf4j-log4j12- 1.6.4.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/opt/sxt/hadoop-2.6.5/share/hadoop/common/lib/slf4jlog4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBi nder.class]SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. root (auth:SIMPLE) groups: root 建表 表名 列族 列族 hbase(main):004:0>hbase(main):006:0> create 'person','name', 'age'

檢視有哪些表

hbase(main):007:0> list

TABLE person 查看錶描述

hbase(main):010:0> describe 'person'

Table person is ENABLED person COLUMN FAMILIES DESCRIPTION {NAME => 'age', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW', REPLICATION_SCOPE => '0', VERSIONS => '1', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL => 'FOREVER', KEEP_DELETED_CELLS => 'FALSE', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'} {NAME => 'name', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW', REPLICATION_SCOPE => '0', VERSIONS => '1', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL => 'FOREVER', KEEP_DELETED_CELLS => 'FALSE', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'} NAME：列族名 VERSIONS：最大版本號 MIN_VERSIONS：最小版本號 TTL（Time To Live）：存活時間 IN_MEMORY：是否開啟快取，預設 false，應該開啟，否則與 BLOCKCACHE 衝突 BLOCKCACHE：讀快取是否開啟，預設開啟，64M 插入資料 hbase(main):012:0> put 'person','0001','name:firstname','Jed' hbase(main):013:0> put 'person','0001','age:zhousui','20' 檢視全部資料

hbase(main):014:0> scan 'person' ROW COLUMN+CELL 0001 column=age:zhousui, timestamp=1499929503879, value=20 0001 column=name:firstname, timestamp=1499929407656, value=Jed 檢視個別資料

hbase(main):015:0> get 'person','0001','name:firstname' COLUMN CELL name:firstname timestamp=1499929407656, value=Jed 修改資料 hbase(main):016:0> put 'person','0001','name:firstname','Tom'

hbase(main):017:0> get 'person','0001','name:firstname' COLUMN CELL name:firstname timestamp=1499929924936, value=Tom 查看錶空間

hbase(main):018:0> list_namespace NAMESPACE default #使用者建立的表放在這裡 hbase #系統表空間 進入存放資料的目錄/var/hbase/local（在 hbase-site.xml 中配置過）

[[email protected] ~]# cd /var/hbase/local/

[[email protected] local]# ls archive data hbase.id hbase.version oldWALs WALs zookeeper data 是存放資料的目錄，oldWAL 和 WALs 是 Hlog

[[email protected] local]# cd data

[[email protected] data]# ls default hbase

[[email protected] data]# cd default/

[[email protected] default]# ls person

[[email protected] default]# cd person/

[[email protected] person]# ls b14e1200e562fb736ce81df88d712823

[[email protected] person]# cd b14e1200e562fb736ce81df88d712823/

[[email protected] b14e1200e562fb736ce81df88d712823]# ls age name

[[email protected] b14e1200e562fb736ce81df88d712823]# cd age

[[email protected] age]# cd ls

總用量 0 age 和 name 下沒有資料，因為資料還在記憶體中，我們設定強制溢寫

hbase(main):028:0> flush 'person'

[email protected] b14e1200e562fb736ce81df88d712823]# cd age/

[[email protected] age]# ls 06c01947d23e4fafa3a95bd407cc8c94

[[email protected] age]# hbase hfile -p -f 06c01947d23e4fafa3a95bd407cc8c94 K: 0001/age:zhousui/1499931020776/Put/vlen=2/mvcc=0 V: 20 刪除表

hbase(main):021:0> disable 'person' #先讓表禁用 hbase(main):022:0> drop 'person' #再刪除表 HBase

HBASE中需要主備模式

HBASE中刪除表需要修改成disabled模式

HBASE中修改表中資料，需要設定表為enabled

HBASE中建表需要設定列族

HBASE中載入資料用put，並且還要加上資料ID號

HBASE的埠號是60010