本文共 11135 字,大约阅读时间需要 37 分钟。
参考:
hbase(main):014:0> scan 'test'ROW COLUMN+CELL a1 column=f:name, timestamp=1586779007598, value=name1 r1 column=f:name, timestamp=1586422233658, value=test 2 row(s) in 0.0150 seconds## 数据模型 "rowkey1" : { "cf1" : { "name" : { 1123123123112 : "lisi", 1231243123312 : "lisi2" }, "job" : { 1512343252351 : "java-enginer" } }, "cf2" : { "city" : { 123461231 : "BeiJin" } } }
hbase系统表(meta, namespace) --> namespace表:存放所有的命名空间, meta: 表的region分布信息
参考:##1,命名空间( database)hbase(main):034:0> list_namespaceNAMESPACE default hbase 2 row(s) in 0.0130 seconds##2,某个命名空间下的表( database.table )hbase(main):037:0> list_namespace_tables 'hbase'TABLE meta namespace 2 row(s) in 0.0340 secondshbase(main):038:0> scan 'hbase:namespace'ROW COLUMN+CELL default column=info:d, timestamp=1586414716734, value=\x0A\x07default hbase column=info:d, timestamp=1586414716750, value=\x0A\x05hbase 2 row(s) in 0.0230 secondshbase(main):036:0> scan 'hbase:meta'ROW COLUMN+CELL hbase:namespace,,1586414715365.6faa8977c7b0 column=info:regioninfo, timestamp=1586744606619, value={ENCODED => 6faa8977c7b0bc9c7021864a0e131544, NAME => 'hbase:namespace,,1 bc9c7021864a0e131544. 586414715365.6faa8977c7b0bc9c7021864a0e131544.', STARTKEY => '', ENDKEY => ''} hbase:namespace,,1586414715365.6faa8977c7b0 column=info:seqnumDuringOpen, timestamp=1586744606619, value=\x00\x00\x00\x00\x00\x00\x00\x0D bc9c7021864a0e131544. hbase:namespace,,1586414715365.6faa8977c7b0 column=info:server, timestamp=1586744606619, value=cdh-node1:60020 bc9c7021864a0e131544. hbase:namespace,,1586414715365.6faa8977c7b0 column=info:serverstartcode, timestamp=1586744606619, value=1586744536803 bc9c7021864a0e131544. test,,1581074147974.6d9cc122b356452eb1a7f5f column=info:regioninfo, timestamp=1586776597280, value={ENCODED => 6d9cc1fc906d, NAME => 'test,,158107414797 834fc906d. 4.6d9cc1fc906d.', STARTKEY => '', ENDKEY => ''} test,,1581074147974.6d9cc122b356452eb1a7f5f column=info:seqnumDuringOpen, timestamp=1586776597280, value=\x00\x00\x00\x00\x00\x00\x00+ 834fc906d. test,,1581074147974.6d9cc122b356452eb1a7f5f column=info:server, timestamp=1586776597280, value=cdh-node1:60020 834fc906d. test,,1581074147974.6d9cc122b356452eb1a7f5f column=info:serverstartcode, timestamp=1586776597280, value=1586744536803 834fc906d. 2 row(s) in 0.0230 seconds
##创建表, 预切分region(设置region数量2个: [1,10), [10, -无穷大] )hbase(main):050:0> create 't1', 'f1', SPLITS => ['10']0 row(s) in 1.2570 seconds=> Hbase::Table - t1
hbase(main):009:0> scan 'hbase:meta',{ROWPREFIXFILTER => 't1,'}ROW COLUMN+CELL t1,,1605080952171.4944c4c339be5433bb46b column=info:regioninfo, timestamp=1605080953044, value={ENCODED => 4944c4c339be5433bb46bd7260fd5ff1, NAME => 't1,,16 d7260fd5ff1. 05080952171.4944c4c339be5433bb46bd7260fd5ff1.', STARTKEY => '', ENDKEY => '10'} t1,,1605080952171.4944c4c339be5433bb46b column=info:seqnumDuringOpen, timestamp=1605080953044, value=\x00\x00\x00\x00\x00\x00\x00\x02 d7260fd5ff1. t1,,1605080952171.4944c4c339be5433bb46b column=info:server, timestamp=1605080953044, value=hadoop1:60020 d7260fd5ff1. t1,,1605080952171.4944c4c339be5433bb46b column=info:serverstartcode, timestamp=1605080953044, value=1605056703882 d7260fd5ff1. t1,10,1605080952171.5313a2af3e1b6d2da49 column=info:regioninfo, timestamp=1605080953061, value={ENCODED => 5313a2af3e1b6d2da49b7531995f2462, NAME => 't1,10, b7531995f2462. 1605080952171.5313a2af3e1b6d2da49b7531995f2462.', STARTKEY => '10', ENDKEY => ''} t1,10,1605080952171.5313a2af3e1b6d2da49 column=info:seqnumDuringOpen, timestamp=1605080953061, value=\x00\x00\x00\x00\x00\x00\x00\x02 b7531995f2462. t1,10,1605080952171.5313a2af3e1b6d2da49 column=info:server, timestamp=1605080953061, value=hadoop1:60020 b7531995f2462. t1,10,1605080952171.5313a2af3e1b6d2da49 column=info:serverstartcode, timestamp=1605080953061, value=1605056703882 b7531995f2462.2 row(s) in 0.0150 seconds
## 0,hbase表的存储格式[root@cdh-node1 ~]# hdfs dfs -ls /hbase/data/default/testFound 3 itemsdrwxr-xr-x - hbase hbase 0 2020-04-13 11:16 /hbase/data/default/test/.tabledesc #表的描述信息: desc tab1drwxr-xr-x - hbase hbase 0 2020-04-13 11:16 /hbase/data/default/test/.tmp #正常是空目录,除非compact,splitdrwxr-xr-x - hbase hbase 0 2020-04-13 11:16 /hbase/data/default/test/6d9cc1fc906d #表的regionfile/hstore/storefile[root@cdh-node1 ~]# hdfs dfs -ls /hbase/data/default/test/6d9cc1fc906dFound 4 items-rw-r--r-- 1 hbase hbase 39 2020-04-09 08:51 /hbase/data/default/test/6d9cc1fc906d/.regioninfodrwxr-xr-x - hbase hbase 0 2020-04-13 11:16 /hbase/data/default/test/6d9cc1fc906d/.tmp #正常是空目录drwxr-xr-x - hbase hbase 0 2020-04-13 11:16 /hbase/data/default/test/6d9cc1fc906d/fdrwxr-xr-x - hbase hbase 0 2020-04-13 11:16 /hbase/data/default/test/6d9cc1fc906d/recovered.edits[root@cdh-node1 ~]# hdfs dfs -ls /hbase/data/default/test/6d9cc1fc906d/.regioninfo-rw-r--r-- 1 hbase hbase 39 2020-04-09 08:51 /hbase/data/default/test/6d9cc1fc906d/.regioninfo[root@cdh-node1 ~]# hdfs dfs -cat /hbase/data/default/test/6d9cc1fc906d/.regioninfoPBUF�����.defaulttest"(08[root@cdh-node1 ~]# hdfs dfs -ls /hbase/data/default/test/6d9cc1fc906d/fFound 1 items-rw-r--r-- 1 hbase hbase 994 2020-04-13 11:16 /hbase/data/default/test/6d9cc1fc906d/f/bd8f4d9313db49529bac5a6086871063## 1,查看表默认属性## hbase(main):005:0> desc 'ttl1'## Table ttl1 is ENABLED ## ttl1 ## COLUMN FAMILIES DESCRIPTION ## {NAME => 'f1', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', COMPRESSION => 'N## ONE', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'} ## 1 row(s) in 0.0220 seconds[root@cdh-node1 ~]# hdfs dfs -cat /hbase/data/default/test/.tabledesc/.tableinfo.0000000001PBUFdefaulttestIS_METAfalse�fBLOOMFILTERROWVERSIONS1 IN_MEMORYfalseKEEP_DELETED_CELLSFALSEDATA_BLOCK_ENCODINGNONETTL2147483647COMPRESSIONNONEMIN_VERSIONS0BLOCKCACHEtrue BLOCKSIZE65536REPLICATION_SCOPE0## 2,修改表属性:压缩+ 块编码## hbase(main):006:0> alter 'test',{NAME=>'f',COMPRESSION=>"LZ4",DATA_BLOCK_ENCODING=>"FAST_DIFF"}## Updating all regions with the new schema...## 1/1 regions updated.## Done.## 0 row(s) in 2.0640 seconds## ## hbase(main):007:0> compact## compact compact_mob compact_rs## hbase(main):007:0> compact 'test'## 0 row(s) in 0.0690 seconds## ## hbase(main):008:0> major_compact## major_compact major_compact_mob## hbase(main):008:0> major_compact 'test'## 0 row(s) in 0.0510 seconds[root@cdh-node1 ~]# hdfs dfs -ls /hbase/data/default/test/.tabledescFound 1 items-rw-r--r-- 1 hbase hbase 285 2020-04-13 11:16 /hbase/data/default/test/.tabledesc/.tableinfo.0000000002[root@cdh-node1 ~]# hdfs dfs -cat /hbase/data/default/test/.tabledesc/.tableinfo.0000000002PBUFdefaulttestIS_METAfalse�fBLOOMFILTERROWVERSIONS1 IN_MEMORYfalseKEEP_DELETED_CELLSFALSE DATA_BLOCK_ENCODING FAST_DIFFTTL2147483647COMPRESSIONLZ4MIN_VERSIONS0BLOCKCACHEtrue BLOCKSIZE65536REPLICATION_SCOPE0
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