Thanks for your response. Regards!
Yong On Sat, Mar 17, 2012 at 10:09 PM, Stack <st...@duboce.net> wrote: > On Sat, Mar 17, 2012 at 1:06 AM, yonghu <yongyong...@gmail.com> wrote: >> Hello, >> >> I have used the command ./hbase >> org.apache.hadoop.hbase.mapreduce.Export 'test' >> http://localhost:8020/test to export the data content from the test >> table. And I can see the exported content from my hdfs folder, >> hdfs://localhost/test/part-m-00000. I have tried 2 commands to read >> the content in the part-m-00000. One is -cat, the other is -text. But >> both of them show me some garbled message. Can anyone tell me that how >> to rightly read the content from the exported file? >> > > The export produces hadoop sequencefiles where the key is a the row is > a serialized instance of ImmutableBytesWritable and the value a > serialized instance of the hbase Result object. See > http://hbase.apache.org/xref/org/apache/hadoop/hbase/mapreduce/Export.html#99 > where the mapreduce job is set up. > > To read the content, you need one of these: > http://hadoop.apache.org/common/docs/current/api/org/apache/hadoop/io/SequenceFile.Reader.html > Study the SequenceFileInputFormat for sample code. > > St.Ack
