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CORRECT TEXT Problem Scenario 28 : You need to implement near real time solutions for collecting information when submitted in file with below Data echo "IBM,100,20160104" >> /tmp/spooldir2/.bb.txt echo "IBM,103,20160105" >> /tmp/spooldir2/.bb.txt mv /tmp/spooldir2/.bb.txt /tmp/spooldir2/bb.txt After few mins echo "IBM,100.2,20160104" >> /tmp/spooldir2/.dr.txt echo "IBM,103.1,20160105" >> /tmp/spooldir2/.dr.txt mv /tmp/spooldir2/.dr.txt /tmp/spooldir2/dr.txt You have been given below directory location (if not available than create it) /tmp/spooldir2 . As soon as file committed in this directory that needs to be available in hdfs in /tmp/flume/primary as well as /tmp/flume/secondary location. However, note that/tmp/flume/secondary is optional, if transaction failed which writes in this directory need not to be rollback. Write a flume configuration file named flumeS.conf and use it to load data in hdfs with following additional properties . 1 . Spool /tmp/spooldir2 directory 2 . File prefix in hdfs sholuld be events 3 . File suffix should be .log 4 . If file is not committed and in use than it should have _ as prefix. 5 . Data should be written as text to hdfs
Correct Answer:
See the explanation for Step by Step Solution and configuration. Explanation: Solution : Step 1 : Create directory mkdir /tmp/spooldir2 Step 2 : Create flume configuration file, with below configuration for source, sink and channel and save it in flume8.conf. agent1 .sources = source1 agent1.sinks = sink1a sink1bagent1.channels = channel1a channel1b agent1.sources.source1.channels = channel1a channel1b agent1.sources.source1.selector.type = replicating agent1.sources.source1.selector.optional = channel1b agent1.sinks.sink1a.channel = channel1a agent1 .sinks.sink1b.channel = channel1b agent1.sources.source1.type = spooldir agent1 .sources.sourcel.spoolDir = /tmp/spooldir2 agent1.sinks.sink1a.type = hdfs agent1 .sinks, sink1a.hdfs. path = /tmp/flume/primary agent1 .sinks.sink1a.hdfs.tilePrefix = events agent1 .sinks.sink1a.hdfs.fileSuffix = .log agent1 .sinks.sink1a.hdfs.fileType = Data Stream agent1 .sinks.sink1b.type = hdfs agent1 .sinks.sink1b.hdfs.path = /tmp/flume/secondary agent1 .sinks.sink1b.hdfs.filePrefix = events agent1.sinks.sink1b.hdfs.fileSuffix = .log agent1 .sinks.sink1b.hdfs.fileType = Data Stream agent1.channels.channel1a.type = file agent1.channels.channel1b.type = memory step 4 : Run below command which will use this configuration file and append data in hdfs. Start flume service: flume-ng agent -conf /home/cloudera/flumeconf -conf-file /home/cloudera/flumeconf/flume8.conf --name age Step 5 : Open another terminal and create a file in /tmp/spooldir2/ echo "IBM,100,20160104" > /tmp/spooldir2/.bb.txt echo "IBM,103,20160105" > /tmp/spooldir2/.bb.txt mv /tmp/spooldir2/.bb.txt /tmp/spooldir2/bb.txt After few mins echo "IBM.100.2,20160104" >/tmp/spooldir2/.dr.txt echo "IBM,103.1,20160105" > /tmp/spooldir2/.dr.txt mv /tmp/spooldir2/.dr.txt /tmp/spooldir2/dr.txt