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Re: Pregel - Hadoop - [mail # user]
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...Hello, I don't have a background in CS, but does MS's Dryad ( http://research.microsoft.com/en-us/projects/Dryad/ ) fit in anywhere here? Regards Saptarshi On Fri, Jun 26, 2009 ...
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Author: Saptarshi Guha,
2009-06-26, 20:36
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Re: EC2, Hadoop, copy file from CLUSTER_MASTER to CLUSTER, failing - Hadoop - [mail # user]
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...Hello, Thank you. This is quite useful. Regards Saptarshi On Wed, Jun 24, 2009 at 6:16 AM, Tom White wrote: wrote:...
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Author: Saptarshi Guha,
2009-06-24, 18:07
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Re: When is configure and close run - Hadoop - [mail # user]
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...Thank you! Just to confirm. Consider a JVM (that is being reused), has to reduce K1,{V11,V12,V13..} and K2,{V21,V22,V23,....}. Then the configure and close methods are called once each for b...
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Author: Saptarshi Guha,
2009-06-24, 17:00
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Re: EC2, Max tasks, under utilized? - Hadoop - [mail # user]
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...Hello, I should also point out that I'm using a SequenceFileInputFormat. Regards Saptarshi Guha On Tue, Jun 23, 2009 at 10:43 AM, Saptarshi Guha wrote: ...
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Author: Saptarshi Guha,
2009-06-23, 14:50
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EC2, Max tasks, under utilized? - Hadoop - [mail # user]
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...Hello, I'm running a 90 node c1.xlarge cluster. No reducers, mapred.max.map.tasks=6 per machine. The AMI is own and uses Hadoop 0.19.1 The dataset has 145K keys, and the processing time is h...
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Author: Saptarshi Guha,
2009-06-23, 14:43
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When is configure and close run - Hadoop - [mail # user]
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...Hello, In a mapreduce job, a given map JVM will run N map tasks. Are the configure and close methods executed for every one of these N tasks? Or is configure executed once when the JVM start...
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Author: Saptarshi Guha,
2009-06-22, 16:23
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EC2, Hadoop, copy file from CLUSTER_MASTER to CLUSTER, failing - Hadoop - [mail # user]
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...Hello, I have a cluster with 1 master and 1 slave (testing). In the EC2 scripts, in the hadoop-ec2-init-remote.sh file, I wish to copy a file from the MASTER to the CLUSTER i.e in the slave ...
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Author: Saptarshi Guha,
2009-06-20, 06:09
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Tutorial on building an AMI - Hadoop - [mail # user]
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...Hello, Is there a tutorial available to build an Hadoop AMI (like Cloudera's)? Cloudera has an 18.2 ami and for reasons I understand they can't provide(as of now) AMIs for higher Hadoop vers...
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Author: Saptarshi Guha,
2009-05-22, 18:11
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Re: No reduce tasks running, yet 1 is pending - Hadoop - [mail # user]
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...Interestingly, when i started other jobs, this one finished. I have no idea why. Saptarshi Guha On Tue, May 12, 2009 at 10:36 PM, Saptarshi Guha wrote:...
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Author: Saptarshi Guha,
2009-05-13, 02:51
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No reduce tasks running, yet 1 is pending - Hadoop - [mail # user]
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...Hello, I mentioned this issue before for the case of map tasks. I have 43 reduce tasks, 42 completed, 1 pending and 0 running. This is the case for the last 30 minutes. A pictur(tiff) of the...
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Author: Saptarshi Guha,
2009-05-13, 02:36
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