Database Reference
In-Depth Information
Let's also verify the data in HBase:
$ hbase shell
hbase > scan 'sensors'
ROW COLUMN+CELL
sensor11 column=f:max, timestamp=1409087465345, value=90
sensor11 column=f:min, timestamp=1409087465345, value=70
sensor22 column=f:max, timestamp=1409087465345, value=80
sensor22 column=f:min, timestamp=1409087465345, value=70
sensor31 column=f:max, timestamp=1409087465345, value=85
sensor31 column=f:min, timestamp=1409087465345, value=72
sensor33 column=f:max, timestamp=1409087465345, value=75
sensor33 column=f:min, timestamp=1409087465345, value=72
sensor44 column=f:max, timestamp=1409087465345, value=55
sensor44 column=f:min, timestamp=1409087465345, value=42
sensor45 column=f:max, timestamp=1409087465345, value=57
sensor45 column=f:min, timestamp=1409087465345, value=47
sensor55 column=f:max, timestamp=1409087465345, value=55
sensor55 column=f:min, timestamp=1409087465345, value=42
7 row(s) in 2.1180 seconds
Your output might vary slightly.
We can see that seven rows are inserted, confirming the MapReduce counters!
Let's take another quick look at the HBase UI, which is shown here:
 
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