How to convert HDFS text files to Parquet using Talend On the palette add the three following components tHdfsConnection tFileInputDelimited tFileOutputParquet PS : You can do this in a standard job or in a mapreduce job. Spark on Talend doesn’t support Parquet ( yet in v6.0.1) Which big data formats are supported ?
Hadoop Map reduce Tutorial with Python Pre-requisities Download Canopy On the console download Map reduce package : !pip install mrjob Create map reduce code class : from mrjob.job import MRJob class MRRatingCounter(MRJob): def mapper(self, key, line): (userID, movieID, rating, timestamp) = line.split(‘\t’) yield rating, 1 def reducer(self, rating, occurences): yield rating, sum(occurences) if __name__ […]
+100 Cloudera certification preparation questions : CCDH ( edition 2 ) Buy the full report Click Here Because Name node is Single Point of Failure in HDFS, following recommendation on the hardware is done : Storage: Raid Ram: 32GB and Upwards Processors Cores: 16 and upwards Networking: Multiple ports/10 GB bandwidth to switch. True […]