David questions

David answers

• Structured and Unstructured indexing - Lucene and Hbase
• What factors decide the number of executors in a stand alone mode?
• Spark Standalone Mode multiple shell sessions (applications)
• How to rename huge amount of files in Hadoop/Spark?
• realtime querying/aggregating millions of records - hadoop? hbase? cassandra?
• HBase connection exception
• Are there any guava overviews?
• hadoop map reduce job with HDFS input and HBASE output
• How does HBase enable Random Access to HDFS?
• Random access performance in HBase & block size in HDFS