第3 HBase Shell
3.1
1HBase
[lxl@hadoop102 hbase]$ bin/hbase shell
2
hbase(main):001:0> help
3
hbase(main):001:0> list TABLE 0 row(s) in 0.2530 seconds => []
3.2
1
hbase(main):003:0> create 'student','info' 0 row(s) in 1.3670 seconds => Hbase::Table - student
2
hbase(main):003:0> put 'student','1001','info:sex','male' hbase(main):004:0> put 'student','1001','info:age','18' hbase(main):005:0> put 'student','1002','info:name','Janna' hbase(main):006:0> put 'student','1002','info:sex','female' hbase(main):007:0> put 'student','1002','info:age','20'
3
hbase(main):010:0> scan 'student' ROW COLUMN+CELL 1001 column=info:name, timestamp=1560293882038, value=xiannv 1001 column=info:sex, timestamp=1560293938473, value=female 1002 column=info:name, timestamp=1560293958558, value=xiantong 1002 column=info:sex, timestamp=1560293983958, value=male
hbase(main):014:0> scan 'student',{STARTROW=>'1001',STOPROW=>'1003'} ROW COLUMN+CELL 1001 column=info:name, timestamp=1560293882038, value=xiannv 1001 column=info:sex, timestamp=1560293938473, value=female 1002 column=info:name, timestamp=1560293958558, value=xiantong 1002 column=info:sex, timestamp=1560293983958, value=male hbase(main):015:0> scan 'student',{STARTROW => '1001'} ROW COLUMN+CELL 1001 column=info:name, timestamp=1560293882038, value=xiannv 1001 column=info:sex, timestamp=1560293938473, value=female 1002 column=info:name, timestamp=1560293958558, value=xiantong 1002 column=info:sex, timestamp=1560293983958, value=male 1003 column=info:sex, timestamp=1560294341536, value=male 4
hbase(main):016:0> describe 'student' Table student is ENABLED student COLUMN FAMILIES DESCRIPTION {NAME => 'info', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', COMPRESSION => 'NONE', MIN_VERSIONS => '0', BLOCKCA CHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'} 5
hbase(main):012:0> put 'student','1001','info:name','Nick' hbase(main):013:0> put 'student','1001','info:age','100'
6:
hbase(main):011:0> get 'student','1001' COLUMN CELL info:name timestamp=1560293882038, value=xiannv info:sex timestamp=1560293938473, value=female
hbase(main):012:0> get 'student','1001','info:name' COLUMN CELL info:name timestamp=1560293882038, value=xiannv
7
hbase(main):021:0> count 'student'
8
rowkey
hbase(main):016:0> deleteall 'student','1001'
rowkey
hbase(main):017:0> delete 'student','1002','info:sex'
9
hbase(main):018:0> truncate 'student'
提示：disabletruncate
10
首先需要先让该表为disable
hbase(main):019:0> disable 'student'
drop
hbase(main):020:0> drop 'student'
dropERROR: Table student is enabled. Disable it first.
11
info3
hbase(main):022:0> alter 'student',{NAME=>'info',VERSIONS=>3} hbase(main):022:0> get 'student','1001',{COLUMN=>'info:name',VERSIONS=>3} 操作：
hbase(main):018:0> alter 'student', {NAME=>'info',VERSIONS=>3} Updating all regions with the new schema... 1/1 regions updated. Done. 0 row(s) in 1.9710 seconds hbase(main):019:0> describe 'student' Table student is ENABLED student COLUMN FAMILIES DESCRIPTION {NAME => 'info', BLOOMFILTER => 'ROW', VERSIONS => '3', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', COMPRESSION => 'NONE', MIN_VERSIONS => '0', BLOCKCA CHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'} 1 row(s) in 0.0150 seconds hbase(main):020:0> put 'student','1001','info:name','guangshen' 0 row(s) in 0.0080 seconds hbase(main):021:0> get 'student','1001','info:name' COLUMN CELL info:name timestamp=1560295375184, value=guangshen 1 row(s) in 0.0170 seconds hbase(main):022:0> get 'student','1001',{COLUMN=>'info:name',VERSIONS=>3} COLUMN CELL info:name timestamp=1560295375184, value=guangshen info:name timestamp=1560293882038, value=xiannv 1 row(s) in 0.0480 seconds hbase(main):023:0> put 'student','1001','info:name','chunlei' 0 row(s) in 0.0080 seconds hbase(main):024:0> get 'student','1001',{COLUMN=>'info:name',VERSIONS=>3} COLUMN CELL info:name timestamp=1560295467589, value=chunlei info:name timestamp=1560295375184, value=guangshen info:name timestamp=1560293882038, value=xiannv 1 row(s) in 0.0090 seconds hbase(main):025:0> put 'student','1001','info:name','wangjun' 0 row(s) in 0.0080 seconds hbase(main):026:0> get 'student','1001',{COLUMN=>'info:name',VERSIONS=>3} COLUMN CELL info:name timestamp=1560295506023, value=wangjun info:name timestamp=1560295467589, value=chunlei info:name timestamp=1560295375184, value=guangshen 1 row(s) in 0.0080 seconds 第4 HBase
4.1 RowKey
nosql,RowKeyHBASE table
1.RowKey访问
2.RowKeyrange
3.
RowKey(RowKey)(64KB10-100bytes)HBASE
RowKeyRowKey(byte order)RowKey()
4.2 Column Family
HBASEschema()courses:historycourses:mathcourses
4.3 Cell
cell
关键字：无类型、字节码
4.4 Time Stamp
HBASE rowkeycolumnscellcell64HBASE()cell
()HBASEn
4.5 命名空间
:
1) Tabledefault
2) RegionServergroup
3) PermissionACLAccess Control List）。例如，创建表，读取表，删除，更新等等操作。
4) Quotaregion
第5 HBase
5.1
HBase3
图3HBase
1Clientzookeepermetaregionmetametaregion
2namespacerowkeymetaregion
3regionregionserver
4region
5MemStoreBlockCache
6BlockCacheStoreFile()
7StoreFileBlockCache
5.2
Hbase2
图
1ClientHregionServer
2HregionServerHLogwrite ahead log
3HregionServerMemStore
4Client
5.3Flush
1MemStore128M64MHLog
2HDFS
3HLog
5.4
14HmasterRegion
2256MRegionHregionServer
3HregionServerHregionServerhlogHregionServer.META.；
4HLogHDFS