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Map Reduce v2 and YARN - CHUG - 20120604

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Chicago Hadoop Users Group
Chicago Hadoop Users Group

View the accompanying video on vimeo: https://vimeo.com/43474797

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An Introduction to MapReduce 2 and YARN Tom White, Cloudera @tom_e_white June 4, 2012 Chicago HUG Tuesday, June 5, 2012
Road Trip Tuesday, June 5, 2012
About me • Apache Hadoop Committer, PMC Member, Apache Member • Engineer at Cloudera working on core Hadoop • Founder of Apache Whirr • Author of “Hadoop: The Definitive Guide” • http://hadoopbook.com Tuesday, June 5, 2012
First, whatʼs MapReduce 1? Tuesday, June 5, 2012
Tuesday, June 5, 2012
Whatʼs wrong with MR1? Tuesday, June 5, 2012
Motivation 1 • Scaling >4000 nodes • Fewer, larger clusters Tuesday, June 5, 2012
Motivation 2 • HA of Job Tracker • Large, complex state Tuesday, June 5, 2012
Motivation 3 • Poor resource utilization • Slots in MR1 are for either map or reduce Tuesday, June 5, 2012
Yet Another Resource Negotiator Tuesday, June 5, 2012
Tuesday, June 5, 2012
Tuesday, June 5, 2012
Node Manager is a generalized Task Tracker • Task Tracker • fixed number of map or reduce slots • Node Manager • containers with variable resource limits Tuesday, June 5, 2012
Tuesday, June 5, 2012
Tuesday, June 5, 2012
MR is user space YARN is kernel Tuesday, June 5, 2012
Bonus Apps • Distributed shell • MPI (MAPREDUCE-2911) • Master-worker (MAPREDUCE-3315) • Apache Giraph, Hama Tuesday, June 5, 2012
Tuesday, June 5, 2012
Tuesday, June 5, 2012
Old API ≠ MR1 New API ≠ MR2 Tuesday, June 5, 2012
Old API New API o.a.h.mapred o.a.h.mapreduce MR1 ✓ ✓ MR2 ✓ ✓ Tuesday, June 5, 2012
Tuesday, June 5, 2012
Try out MR2 • Apache Hadoop 2.0.0-alpha • hadoop.apache.org • CDH4 and Cloudera Manager • cloudera.com • Cloud - Apache Whirr Tuesday, June 5, 2012
MR1 <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-client</artifactId> <version>1.0.3</version> </dependency> MR2 <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-client</artifactId> <version>2.0.0-alpha</version> </dependency> Tuesday, June 5, 2012
TODO • Still alpha status • Performance tuning • Usability bug fixes • RM recovery • Security in MR2 not complete Tuesday, June 5, 2012
Questions? Tuesday, June 5, 2012

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Map Reduce v2 and YARN - CHUG - 20120604

  • 1. An Introduction to MapReduce 2 and YARN Tom White, Cloudera @tom_e_white June 4, 2012 Chicago HUG Tuesday, June 5, 2012
  • 3. About me • Apache Hadoop Committer, PMC Member, Apache Member • Engineer at Cloudera working on core Hadoop • Founder of Apache Whirr • Author of “Hadoop: The Definitive Guide” • http://hadoopbook.com Tuesday, June 5, 2012
  • 4. First, whatʼs MapReduce 1? Tuesday, June 5, 2012
  • 6. Whatʼs wrong with MR1? Tuesday, June 5, 2012
  • 7. Motivation 1 • Scaling >4000 nodes • Fewer, larger clusters Tuesday, June 5, 2012
  • 8. Motivation 2 • HA of Job Tracker • Large, complex state Tuesday, June 5, 2012
  • 9. Motivation 3 • Poor resource utilization • Slots in MR1 are for either map or reduce Tuesday, June 5, 2012
  • 10. Yet Another Resource Negotiator Tuesday, June 5, 2012
  • 13. Node Manager is a generalized Task Tracker • Task Tracker • fixed number of map or reduce slots • Node Manager • containers with variable resource limits Tuesday, June 5, 2012
  • 16. MR is user space YARN is kernel Tuesday, June 5, 2012
  • 17. Bonus Apps • Distributed shell • MPI (MAPREDUCE-2911) • Master-worker (MAPREDUCE-3315) • Apache Giraph, Hama Tuesday, June 5, 2012
  • 20. Old API ≠ MR1 New API ≠ MR2 Tuesday, June 5, 2012
  • 21. Old API New API o.a.h.mapred o.a.h.mapreduce MR1 ✓ ✓ MR2 ✓ ✓ Tuesday, June 5, 2012
  • 23. Try out MR2 • Apache Hadoop 2.0.0-alpha • hadoop.apache.org • CDH4 and Cloudera Manager • cloudera.com • Cloud - Apache Whirr Tuesday, June 5, 2012
  • 24. MR1 <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-client</artifactId> <version>1.0.3</version> </dependency> MR2 <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-client</artifactId> <version>2.0.0-alpha</version> </dependency> Tuesday, June 5, 2012
  • 25. TODO • Still alpha status • Performance tuning • Usability bug fixes • RM recovery • Security in MR2 not complete Tuesday, June 5, 2012