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Re: Object Serialization - Hadoop - [mail # user]
...As I know, Pig use object serilazation to put object into configration and then transfer it  to map and reduce task, and then map and reduce task desericalbe these object.  Could y...
   Author: Jeff Zhang, 2009-11-30, 08:34
Re: Doubt in Hadoop - Hadoop - [mail # user]
...Do you run the map reduce job in command line or IDE?  in map reduce mode, you should put the jar containing the map and reduce class in your classpath   Jeff Zhang    On...
   Author: Jeff Zhang, 2009-11-27, 07:31
Re: Environment for Hadoop Proto Typing - Amazon Web Services - Hadoop - [mail # dev]
...Amazon EC2 will charge you by hours, so I think it will fit for your requirement.   Jeff Zhang   On Thu, Nov 26, 2009 at 1:42 PM, Palikala, Rajendra (CCL)  wrote:  ...
   Author: Jeff Zhang, 2009-11-27, 00:22
[expand - 1 more] - Re: KeyValueTextInputFormat and Hadoop 0.20.1 - Hadoop - [mail # user]
...It's in trunk, maybe this is not added in hadoop 0.20.1    On Thu, Nov 26, 2009 at 8:13 AM, Matthias Scherer <Matthias.Scherer@1und1.d e  red/org/apache/hadoop/mapreduce/li...
   Author: Jeff Zhang, 2009-11-26, 16:18
[expand - 2 more] - Re: Processing 10MB files in Hadoop - Hadoop - [mail # user]
...Quote from the wiki doc  *The number of map tasks can also be increased manually using the JobConf's conf.setNumMapTasks(int num). This can be used to increase the number of map tasks, ...
   Author: Jeff Zhang, 2009-11-26, 16:05
Re: Good idea to run NameNode and JobTracker on same machine? - Hadoop - [mail # user]
...It depends on the size of your cluster. I think you can combine them together if your cluster has less than 10 machines.   Jeff Zhang     On Thu, Nov 26, 2009 at 6:26 AM, Raym...
   Author: Jeff Zhang, 2009-11-26, 15:01
[expand - 1 more] - Re: How to handle imbalanced data in hadoop ? - Hadoop - [mail # user]
...agree, the worst case for quick sort is O(n2) if all the data is the same.  and in this case the running for heapsort is O(n*log n)  Jeff Zhang   On Tue, Nov 24, 2009 at 7:35 ...
   Author: Jeff Zhang, 2009-11-24, 16:09
Re: Saving Intermediate Results from the Mapper - Hadoop - [mail # user]
...Hi Jason,  which option is for setting disable the removal of intermediate data ?  Thank you  Jeff Zhang   On Mon, Nov 23, 2009 at 10:27 AM, Jason Venner wrote:  ...
   Author: Jeff Zhang, 2009-11-23, 02:38
[expand - 3 more] - Re: Starting Hadoop cluster on EC2 - Hadoop - [mail # general]
...The ssh is installed on ec2 by default, otherwise you have no way to login to ec2   Jeff Zhang    On Sun, Nov 22, 2009 at 8:09 AM, Something Something  wrote:  ...
   Author: Jeff Zhang, 2009-11-22, 16:19
[expand - 1 more] - Re: Is the mapper output type must the same as reducer if combiner is used ? - Hadoop - [mail # user]
...karthik,  In your case, then the Combiner is not the same as Reducer. So it is not necessary to make the combiner same as reducer, right?  Thank you  Jeff Zhang   2009/11...
   Author: Jeff Zhang, 2009-11-22, 15:41
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