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Re: Is it possible to write file output in Map phase once and write another file output in Reduce phase? - Hadoop - [mail # user]
...Of course.  It is just a set of Hadoop programs.  2010/12/11 edward choi  ...
   Author: Ted Dunning, 2010-12-11, 18:00
Re: Announcing KeptCollections, distributed Java Collections for ZooKeeper - Hadoop - [mail # general]
...It definitely can go that way.  But some things are pretty nicely viewed that way.  For instance, wouldn't it be nice to have a "live processes" set in different programs?  Of...
   Author: Ted Dunning, 2010-12-09, 23:22
Re: java.lang.OutOfMemoryError: GC overhead limit exceeded - Hadoop - [mail # user]
...If there are combiners, the reducers shouldn't get any lists longer than a small multiple of the number of maps.  On Sun, Sep 26, 2010 at 6:01 PM, Bradford Stephens  wrote:  ...
   Author: Ted Dunning, 2010-09-27, 02:00
Re: how to transfer the parameter from a reduce to another iteration of mapred - Hadoop - [mail # user]
...1.  Attachments don't work with this mailing list.  2.  Use a combiner to combine your sums and counts into bigger sums and counts  3.  The reducer should take a lis...
   Author: Ted Dunning, 2009-10-11, 21:39
Re: Parallel data stream processing - Hadoop - [mail # user]
...On Fri, Oct 9, 2009 at 11:02 PM, Ricky Ho  wrote:  m  Current implementations are definitely batch oriented.  Keep reading, though.     Abolutely.   t &nbs...
   Author: Ted Dunning, 2009-10-10, 08:01
Re: Hey Cloudera can you help us In beating Google Yahoo Facebook? - Hadoop - [mail # dev]
...On Fri, Oct 2, 2009 at 4:02 PM, Smith Stan  wrote:   What do you mean beat Yahoo, Google and Facebook?   Is it true that Google uses hadoop?  Yes.  Mostly for educat...
   Author: Ted Dunning, 2009-10-02, 23:36
Re: Advice on new Datacenter Hadoop Cluster? - Hadoop - [mail # user]
...Depending on your needs and the size of your cluster, the out-of-band management can be of significant interest.  It is a pretty simple cost/benefit analysis that trades your sysops tim...
   Author: Ted Dunning, 2009-09-30, 23:27
Re: last map task taking too long - Hadoop - [mail # dev]
...Is that last map task actually running, or is it pending?  On Tue, Sep 29, 2009 at 5:57 PM, achilles852  wrote:    Ted Dunning, CTO DeepDyve...
   Author: Ted Dunning, 2009-09-30, 01:01
Re: Which instance type on Amazon EC2? - Hadoop - [mail # user]
...IN our experiments, the large instance turned out better, but that was largely due to our need for substantial memory.  For many of our jobs, the different between 4x as many small node...
   Author: Ted Dunning, 2009-09-29, 20:07
Re: Running Hadoop on cluster with NFS booted systems - Hadoop - [mail # user]
...Hmm....  I have to say that I haven't used (or heard of problems with) Infiniband.  Just to clarify for myself, did you say here that Hadoop uses the 1Gb network and MPI and NFS us...
   Author: Ted Dunning, 2009-09-29, 00:34
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