hbase中除了有查看hfile文件的命令,也提供也查看hlog文件的命令:
在hbase的根目录下有个.logs目录,里面就是hlog文件,一台RegionServer机器对应一个文件。老的hlog文件会被移到.oldlogs目录:
- [admin@bufer108081.tbc ~/dev/baoniu]$ hadoop fs -ls /hbase-0.90/.logs
- Found 49 items
- drwxrwxr-x - hadoop hadoop,admin 0 2014-05-20 20:43 /hbase-0.90/.logs/bufer108056.tbc,30020,1400049798389
- drwxrwxr-x - hadoop hadoop,admin 0 2014-05-20 20:43 /hbase-0.90/.logs/bufer108057.tbc,30020,1400049798399
- drwxrwxr-x - hadoop hadoop,admin 0 2014-05-20 20:43 /hbase-0.90/.logs/bufer108058.tbc,30020,1400049798425
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命令的参数:
- [admin@bufer108081.tbc ~/dev/baoniu]$ ~/hbase/bin/hbase org.apache.hadoop.hbase.regionserver.wal.HLog --dump
- Usage: HLog <ARGS>
- Arguments:
- --dump Dump textual representation of passed one or more files
- For example: HLog --dump hdfs://example.com:9000/hbase/.logs/MACHINE/LOGFILE
- --split Split the passed directory of WAL logs
- For example: HLog --split hdfs://example.com:9000/hbase/.logs/DIR
-
- [admin@bufer108081.tbc ~/dev/baoniu]$ ~/hbase/bin/hbase org.apache.hadoop.hbase.regionserver.wal.HLog --dump -h usage: HLog <filename...> [-h] [-j] [-p] [-r <arg>] [-s <arg>] [-w <arg>]
- -h,--help Output help message
- -j,--json Output JSON
- -p,--printvals Print values
- -r,--region <arg> Region to filter by. Pass region name; e.g.
- '.META.,,1'
- -s,--sequence <arg> Sequence to filter by. Pass sequence number.
- -w,--row <arg> Row to filter by. Pass row name.
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通过以下命令就可以查看hlog文件的内容:
- [admin@bufer108081.tbc ~/dev/baoniu]$ ~/hbase/bin/hbase org.apache.hadoop.hbase.regionserver.wal.HLog --dump -p /hbase-0.90/.logs/bufer108118.tbc,30020,1400049798450/bufer108118.tbc%2C30020%2C1400049798450.1400557412298
- 14/05/20 15:06:49 INFO Configuration.deprecation: fs.default.name is deprecated. Instead, use fs.defaultFS
- Sequence 8347119 from region a98994dbcf5b1fcd47f69efcf804c385 in table test
- Action:
- row: 0042:2100520170149
- column: a:title
- at time: Tue May 20 11:43:45 CST 2014
- value: \xE5\x95\x86\xE5\x93\x81\xE4\xB8\xADxE8\xAF\x95\xE5\xAE\x9D\xE8\xB4\x9D
- Action:
- row: 0042:2100520170149
- column: a:user_id
- at time: Tue May 20 11:43:45 CST 2014
- value: 778896
- Action:
- row: 0042:2100520170149
- column: a:pict_url
- at time: Tue May 20 11:43:45 CST 2014
- value: 19/60/74/196074.jpg
- Action:
- row: 0042:2100520170149
- column: a:categ
- at time: Tue May 20 11:43:45 CST 2014
- value: 1101
- Action:
- row: 0042:2100520170149
- column: a:minimum_bid
- at time: Tue May 20 11:43:45 CST 2014
- value: 2000.00
- Action:
- row: 0042:2100520170149
- column: a:reserve_price
- at time: Tue May 20 11:43:45 CST 2014
- value: 2000.00
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