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From "Robinson, Landon - Landon" <landon.t.robin...@lowes.com>
Subject Re: Hadoop Configuration from DoFn
Date Tue, 13 Oct 2015 20:02:21 GMT
You can do it both ways: at the DoFn level or at the pipeline level.

For global settings, go with the pipeline level. For individual jobs/tasks, go DoFn Level.

Pipeline Level:


Configuration crunchConf = getConf();
crunchConf.set("mapred.job.queue.name", "batch");
Pipeline pipeline = new MRPipeline(TransformKronosMR.class, “My Pipeline" ,crunchConf);


DoFn Level (as mentioned):

@Override
public void configure(Configuration conf) {
  conf.set("mapreduce.map.java.opts", "-Xmx3900m");
  conf.set("mapreduce.reduce.java.opts", "-Xmx3900m");

  conf.set("mapreduce.map.memory.mb", "4096");
  conf.set("mapreduce.reduce.memory.mb", "4096");
}


---------------------------------------------------------------------------
[cid:3940A2A6-14FD-49BC-AC41-B9E206378684]
Landon Robinson
Big Data/Hadoop Engineer
Lowe’s Companies Inc. | IT Business Intelligence
---------------------------------------------------------------------------

From: Micah Whitacre <mkwhitacre@gmail.com<mailto:mkwhitacre@gmail.com>>
Reply-To: "user@crunch.apache.org<mailto:user@crunch.apache.org>" <user@crunch.apache.org<mailto:user@crunch.apache.org>>
Date: Tuesday, October 13, 2015 at 3:55 PM
To: "user@crunch.apache.org<mailto:user@crunch.apache.org>" <user@crunch.apache.org<mailto:user@crunch.apache.org>>
Subject: Re: Hadoop Configuration from DoFn

Luke,
  Generally that configuration should be set on the Configuration object passed to Pipeline
vs on the individual DoFns.  The configure(...) method is called when re-instantiating the
DoFn on the Map/Reduce task and at that point those memory settings wouldn't be honored.

On Tue, Oct 13, 2015 at 2:52 PM, Luke Hansen <luke@wealthfront.com<mailto:luke@wealthfront.com>>
wrote:
Does anyone know if this is the right way to configure Hadoop from a Crunch DoFn?  This didn't
seem to affect anything.

Thanks!

@Override
public void configure(Configuration conf) {
  conf.set("mapreduce.map.java.opts", "-Xmx3900m");
  conf.set("mapreduce.reduce.java.opts", "-Xmx3900m");

  conf.set("mapreduce.map.memory.mb", "4096");
  conf.set("mapreduce.reduce.memory.mb", "4096");
}


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