• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
  • Campbell Ritchie
  • Liutauras Vilda
  • Junilu Lacar
  • Jeanne Boyarsky
  • Bear Bibeault
  • Knute Snortum
  • Devaka Cooray
  • Tim Cooke
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Tim Holloway
  • Ron McLeod
  • Carey Brown
  • Paweł Baczyński
  • Piet Souris
  • Vijitha Kumara

Reducer's Performance in Hadoop

Posts: 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Is there an easy way (API way) to measure the reducer's (reduce task) performance in Apache Hadoop (version 2.6.5 if it matters).

1. Measuring the completion time (from starting the task till it finishes) of an reduce task? without measuring the time before and after in JAVA?
2. Finding where the reduce tasks have been activated before or after they run? without (again) using any java code in the reducer class.
In addition, is there any (easy) way to insert more variables to "inside functions"? which we sometimes override, for instance getPartition inside Partitioner Class (or use an unset/unused variable that I can modify easily using API, for example, setNumReduceTasks)
See ya later boys, I think I'm in love. Oh wait, she's just a tiny ad:
Java file APIs (DOC, XLS, PDF, and many more)
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!