Tag Archives: hbase

How-to : Write a CoProcessor in HBase

What is Coprocessor in HBase ?

Coprocessor is a mechanism which helps to move computations closer to the data in HBase. It is like a Mapreduce framework to distribute tasks across the cluster.hbase_logo You can think of them like either Aspects in Java ¬†where it intercepts code before and after some critical operations and … Continue Reading ››

Hive Strict Mode

Sort By vs Order By vs Group By vs Cluster By in Hive

What is Hive Strict Mode ?

Hive Strict Mode ( hive.mapred.mode=strict) enables hive to restrict certain performance intensive operations. Such as -
  • It restricts queries of partitioned tables without a WHERE clause.