Friday, January 26, 2018

Limitations of Hadoop Version 1


Limitations of Hadoop 1

Scalability 
  • Max cluster size ~5000 nodes
  • Max concurrent tasks ~40,000
  • Coarse Synchronization in JobTracker
Availability
  • Failure kills Queued and running JobTracker
Hard partition of resources into map and reduce slots
  • Non-optimal Resource Utilization
Lacks support for Alternate Paradigms and Services
  • Iterative applications in MapReduce are 10x slower

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