Boggio questions

Boggio answers

• Efficient way to join a cached spark dataframe with other and cache again
• Partitions not being pruned in simple SparkSQL queries
• Get string descriptor using PyUSB usb.util.get_string()
• How to get the name of input file in MRjob
• Spark query running very slow
• Read data from Hadoop HDFS with SparkSQL connector to visualize it in Superset?