The sequence diagram of the monitoring pattern for EOD is
shown in Fig. 2. At first, the CESCM client delivers the
GetCapabilities request to query useable and suitable processes
on the server side. The client then obtains the optional and
mandatory parameters required by the process through the
DescribeProcess interface. The Execute operation is then called
to execute this process. Then, JobTracker is triggered to submit
the job to the Hadoop NameNode. By invoking the appropriate
algorithm for the remote sensors, the system generates the
SSM mapping result with the help of the Hadoop environment.
In the map/reduce phase, the write process will be repeated on
the NameNode and DataNode. SM mapping and mosaic
process is completed in this phase. Afterwards, the result will
be inserted into SOS via the data insertion interface. Finally,
the job is terminated.
Fig. 2.