Hi,
I use Hadoop 0.19.1 and HBase 0.19.3.
I write a simple table which have 2 column families (Level0:trail_id,
Level1:trail_id).
And I put the data (4 rows) into hbase table:
120_25 column=Level0:trail_id,
timestamp=2009091613240001, value=39999;21234
121.1_23.4 column=Level1:trail_id,
timestamp=2009091613240001, value=50001;00048;111110
121.1_25.0 column=Level1:trail_id,
timestamp=2009091613240001, value=39999;21234
121_25 column=Level0:trail_id,
timestamp=2009091613240003, value=39999;21234;000001;000003
I find the content of files in HDFS is:
for the mapfile Level0:
SEQ!org.apache.hadoop.hbase.HStoreKey1org.apache.hadoop.hbase.io.ImmutableBytesWritable�������h =
�p{9
��1������.��� 120_25Level0:trail_id�#B����� 39999;21234���<��� 121_25Level0:trail_id�#B�����39999;21234;000001;000003
for the mapfile Level1:
SEQ!org.apache.hadoop.hbase.HStoreKey1org.apache.hadoop.hbase.io.ImmutableBytesWritable�������>T��4�q-����.���9���#
121.1_23.4Level1:trail_id�#B�����50001;00048;111110���2���#
121.1_25.0Level1:trail_id�#B����� 39999;21234
I wonder that what the messy code means? Is that "offset" and/or
"timestamps"?
Besides, since hbase store the mapfile depends on columnfamily, why we need
to save that (in this case: Level0 and Level1)?
I appreciate your helps or guides.
stchu
