修改HBase表结构之前首先需要disable表,然后进行更改相关表结构信息,最后enable表,如下
1. 动态添加一个或多个列簇
hbase(main):034:0> describe 'HiddenIPInfo'
DESCRIPTION ENABLED
'HiddenIPInfo', {NAME => 'IPAddress', DATA_BLOCK_ENCODING => 'NONE', BLOOMFI true
LTER
=> 'NONE', REPLICATION_SCOPE => '0', VERSIONS => '3',
COMPRESSION => 'N
ONE',
MIN_VERSIONS => '0', TTL => '2147483647', KEEP_DELETED_CELLS
=> 'false
', BLOCKSIZE
=> '65536', IN_MEMORY => 'false', ENCODE_ON_DISK => 'true',
BLO
CKCACHE => 'true'}
hbase(main):024:0> disable 'HiddenIPInfo'
0 row(s) in 4.9910 seconds
hbase(main):025:0> alter 'HiddenIPInfo','Address','family1','family2'......(添加一个or多个列簇)
Updating all regions with the new schema...
1/1 regions updated.
Done.
0 row(s) in 2.5730 seconds
hbase(main):026:0> enable 'HiddenIPInfo'
0 row(s) in 3.0570 seconds
hbase(main):027:0> describe 'HiddenIPInfo'
DESCRIPTION ENABLED
'HiddenIPInfo', {NAME => 'Address', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILT true
ER => 'NONE', REPLICATION_SCOPE => '0', COMPRESSION => 'NONE', VERSIONS => '
3', TTL => '2147483647', MIN_VERSIONS => '0', KEEP_DELETED_CELLS => 'false',
BLOCKSIZE => '65536', ENCODE_ON_DISK => 'true', IN_MEMORY => 'false', BLOCK
CACHE => 'true'}, {NAME => 'IPAddress', DATA_BLOCK_ENCODING => 'NONE', BLOOM
FILTER => 'NONE', REPLICATION_SCOPE => '0', VERSIONS => '3', COMPRESSION =>
'NONE', MIN_VERSIONS => '0', TTL => '2147483647', KEEP_DELETED_CELLS => 'fal
se', BLOCKSIZE => '65536', IN_MEMORY => 'false', ENCODE_ON_DISK => 'true', B
LOCKCACHE => 'true'}
1. 动态删除一个(only 1)列簇(若删除多个列簇,需逐个删除)
hbase(main):031:0> disable 'HiddenIPInfo'
0 row(s) in 1.6290 seconds
hbase(main):032:0> alter 'HiddenIPInfo','delete' => 'Address'
Updating all regions with the new schema...
1/1 regions updated.
Done.
0 row(s) in 1.8950 seconds
hbase(main):033:0> enable 'HiddenIPInfo'
0 row(s) in 1.5700 seconds
hbase(main):034:0> describe 'HiddenIPInfo'
DESCRIPTION ENABLED
'HiddenIPInfo', {NAME => 'IPAddress', DATA_BLOCK_ENCODING => 'NONE', BLOOMFI true
LTER => 'NONE', REPLICATION_SCOPE => '0', VERSIONS => '3', COMPRESSION => 'N
ONE', MIN_VERSIONS => '0', TTL => '2147483647', KEEP_DELETED_CELLS => 'false
', BLOCKSIZE => '65536', IN_MEMORY => 'false', ENCODE_ON_DISK => 'true', BLO
CKCACHE => 'true'}
1 row(s) in 0.1390 seconds