HBase 查看HFile内容

 

hbase 查看HFile hbase的数据文件最终存放的是HFile文件,即对MFile存储格式的封装修改,存储的为二进制格式内容,目前hbase提供的hbase org.apache.hadoop.hbase.io.hfile.HFile 工具类可以查看HFile文件内容,对排查region的分布情况有很大用途,以下为查询步骤:

• 定位HFile文件

[hadoop@rm ~]$ hadoop fs -ls /hbase/data/default/TEST/b91a1994accb6e4fc2515aadd74dfc7b/0
15/03/26 17:47:01 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Found 1 items
-rw-r--r--   3 hadoop supergroup     327313 2015-03-20 22:18 /hbase/data/default/TEST/b91a1994accb6e4fc2515aadd74dfc7b/0/8413bc9aa70342f0a86a7ca7d70568a9

• HFile查看8413bc9aa70342f0a86a7ca7d70568a9 文件

hbase hbase org.apache.hadoop.hbase.io.hfile.HFile -f /hbase/data/default/TEST/b91a1994accb6e4fc2515aadd74dfc7b/0/8413bc9aa70342f0a86a7ca7d70568a9 -p

• 回车即可
• 更多hbase org.apache.hadoop.hbase.io.hfile.HFile 的参数 可以

[hadoop@rm ~]$ /oneapm/local/hbase-0.98.10.1-hadoop2/bin/hbase org.apache.hadoop.hbase.io.hfile.HFile 
2015-03-26 17:52:45,338 INFO  [main] Configuration.deprecation: hadoop.native.lib is deprecated. Instead, use io.native.lib.available
2015-03-26 17:52:45,485 INFO  [main] util.ChecksumType: Checksum using org.apache.hadoop.util.PureJavaCrc32
2015-03-26 17:52:45,486 INFO  [main] util.ChecksumType: Checksum can use org.apache.hadoop.util.PureJavaCrc32C
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/oneapm/local/hbase-0.98.10.1-hadoop2/lib/slf4j-log4j12-1.6.4.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/oneapm/local/hadoop-2.5.2/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
2015-03-26 17:52:45,757 WARN  [main] util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
2015-03-26 17:52:46,329 INFO  [main] Configuration.deprecation: fs.default.name is deprecated. Instead, use fs.defaultFS
usage: HFile [-a] [-b] [-e] [-f <arg> | -r <arg>] [-h] [-k] [-m] [-p]
       [-s] [-v] [-w <arg>]
 -a,--checkfamily         Enable family check
 -b,--printblocks         Print block index meta data
 -e,--printkey            Print keys
 -f,--file <arg>          File to scan. Pass full-path; e.g.
                          hdfs://a:9000/hbase/hbase:meta/12/34
 -h,--printblockheaders   Print block headers for each block.
 -k,--checkrow            Enable row order check; looks for out-of-order
                          keys
 -m,--printmeta           Print meta data of file
 -p,--printkv             Print key/value pairs
 -r,--region <arg>        Region to scan. Pass region name; e.g.
                          'hbase:meta,,1'
 -s,--stats               Print statistics
 -v,--verbose             Verbose output; emits file and meta data
                          delimiters
 -w,--seekToRow <arg>     Seek to this row and print all the kvs for this
                          row only
[hadoop@rm ~]$