Bob questions

• Hadoop MR: better to have compressed input files or raw files?
• JAVA: How to parse Integer numbers (delimited by a variable number of spaces) in a line of a text file
• WARN snappy.LoadSnappy: Snappy native library not loaded
• Hadoop MapReduce: Possible to define two mappers and reducers in one hadoop job class?
• Hadoop MapReduce: Appropriate input files size?
• Filtering a data frame
• Hadoop: key and value are tab separated in the output file. how to do it semicolon-separated?

Bob answers