Monthly Archives: March 2016

How to stop Tez jobs

Posted in Hive by

Apache Tez is a fast data processing engine that can be used as an alternative to slow and old MapReduce. Tez runs on YARN.

MapReduce applications (jobs) can be listed using command: mapred job -list

MapReduce jobs can be killed using: mapred job -kill <JobId>

$ mapred job -list
16/03/16 17:22:41 INFO client.RMProxy: Connecting to ResourceManager at ip-10-10-10-10.ec2.internal/10.10.10.10:8032
Total jobs:2
 JobId State StartTime UserName Queue Priority UsedContainers RsvdContainers UsedMem RsvdMem NeededMem AM info
job_1457636583888_30685 RUNNING 1458148947326 hadoop default NORMAL 1 0 3392M 0M 3392M http://ip-10-10-10-10.ec2.internal:20888/proxy/application_1457636583888_30685/
job_1457636583888_30686 PREP 1458148961271 hadoop default NORMAL 1 0 2880M 0M 2880M http://ip-10-10-10-10.ec2.internal:20888/proxy/application_1457636583888_30686/

 

Tez jobs can be listed using: yarn application -list

Tez jobs can be killed using: yarn application -kill <Application-Id>

$ yarn application -list
16/03/16 17:24:25 INFO client.RMProxy: Connecting to ResourceManager at ip-10-10-10-10.ec2.internal/10.10.10.10:8032
Total number of applications (application-types: [] and states: [SUBMITTED, ACCEPTED, RUNNING]):2
 Application-Id Application-Name Application-Type User Queue State Final-State Progress Tracking-URL
application_1457636583888_30638 HIVE-64481d5d-eb4f-4a13-a3d8-ab2584547368 TEZ hadoop default RUNNING UNDEFINED 99.85% http://ip-10-10-10-10.ec2.internal:52648/ui/
application_1457636583888_30690 oozie:launcher:T=hive:W=some_job:A=some_name:ID=0005123-160310193446393-oozie-oozi-W MAPREDUCE hadoop default RUNNING UNDEFINED 5% http://ip-10-10-10-10.ec2.internal:32777

 

 

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What is training and model in Machine Learning

Posted in Uncategorized by

Machine Learning is about predicting future behavior based on past data. And this is done by machines (computers), hence the name Machine Learning. It’s also called Data Science in recent times.

What is model?

A model is an algorithm designed to draw some conclusions based on past data.

Example

Based on historical data of payments, it can be predicted the same behavior on a new person.

A person paying monthly rent, credit card, and mortgage payments on time => Another person paying rent, credit payment on time can pay mortgage payments on time too.

What is training a model?

Training a model is designing (computing) an algorithm based on some training data (sample data used to train).

 

P.S.: There is lot to learn on Machine Learning. These two words always confused me. It took long time to understand them.