Hands-On Big Data Processing and Analysis Guide
Explore practical examples and instructions for analyzing log files, running Scala scripts, implementing word count, editing hosts files, and loading data to HDFS. Enhance your understanding of big data processing through step-by-step tutorials.
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Example 1: Analyzing the Log. val file = sc.textFile("hdfs://sandbox-hdp.hortonworks.com:8020/tmp/littlelog.csv") file.collect().foreach(println) val fltr = file.filter(_.length > 0) val keys = fltr.map(_.split(",")).map(a => a(5)) val stateCnt = keys.map(key => (key,1)) stateCnt.collect().foreach(println) val lastMap = stateCnt.countByKey
Put Interactive Scala Statement in a File Run the file on scala shell scala> :load logAnalyzer.scala
Wordcount example var count = file.flatMap(Record=>Record.split(" ")).map(W=>(W, 1L)).reduceByKey(_+_).collect
Appendix Edit hosts file Go to C:\Windows\System32\drivers\etc
Load littlelog.csv to hdfs hadoop fs -put /tmp/littlelog.csv /tmp/
