About Me

Love JAVA related technologies. Recently researching on Enterprise Integration (SOA and Messaging), Mobility and Big Data. I have working in JAVA related technologies as Software Architect, Enterprise Architect and Software Developer/Engineer for over 11 years. Currently, I am working as Senior Consultant of VMWare Inc.

Friday, November 9, 2012

Hadoop limitations

  1. Availability -- Master process are single point of failure (Hadoop 2.x brings HA supports for NameNode and JobTracker to migrate this issue)
  2. Security -- security model is disabled by default. No storage or wire-level encryption.  
    1. configure to run with Keberos (a network authentication protocol)
  3.  HDFS -- lack of availability 
  4. MapReduce -- is a "batch-based architecture" and it uses "shared-nothing architecture".  Not good for job that needs real-time data access.
  5. Ecosystem version compatibilities 

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