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Re: setNumReduceTasks(1) - Hadoop - [mail # general]
...*See my comments below*  On Mon, Jan 25, 2010 at 3:22 PM, Something Something  wrote:     *--Maybe you can use Counter to track the number of rows you add to HBase, then ...
   Author: Jeff Zhang, 2010-01-26, 00:09
Re: How to timeout HFDS commands - Hadoop - [mail # user]
...Then you can put the HDFS operation in one thread, and kill the thread if you want to it timeout    On Fri, Jan 22, 2010 at 6:37 PM, Yiping Han  wrote:    Best Regar...
   Author: Jeff Zhang, 2010-01-22, 10:40
Re: Which config parameters are node-specific? - Hadoop - [mail # user]
...I believe all these parameters can be set as node-specific, because they are in different JVM. Correct me if I am wrong.    On Wed, Jan 20, 2010 at 8:31 AM, Zhang, Zhang wrote: &nb...
   Author: Jeff Zhang, 2010-01-20, 02:32
Re: Exception occurs when I try to read a file - Hadoop - [mail # user]
...I guess the reason is that the version of hadoop on server side is not compatible with the version you use in client side.    On Tue, Jan 19, 2010 at 1:48 PM, ztesoft  wrote: ...
   Author: Jeff Zhang, 2010-01-19, 08:12
Re: add worker nodes when job is running - Hadoop - [mail # general]
...I don't think you need to do extra anything, the Sheduler on JT will do it for you. When there's node becoming free, Scheduler will assign new task to these nodes.   On Mon, Jan 18, 201...
   Author: Jeff Zhang, 2010-01-18, 06:09
Re: Is it always called part-00000? - Hadoop - [mail # user]
...Hi Mark,  1. If you use the old API, the ouput file is named part-00000, and if you use the new API, the output file will be part-r-00000, and there will be usually more than 1 output f...
   Author: Jeff Zhang, 2010-01-18, 02:15
Re: Quick Clarification of sort mechanism - Hadoop - [mail # user]
...Hi Rob,  The sort is an internal mechanism in hadoop, the reduce step will always do sort on the keys. If you want to sort the result by count, you could start a second job with the inp...
   Author: Jeff Zhang, 2010-01-16, 02:56
Re: DataNodeCluster - Hadoop - [mail # user]
...Hi ryan,  I think you can use MiniDFSCluster in the test package, lots of testcase of hadoop use this class to create a cluster locally. You can refer some testcase for details.   ...
   Author: Jeff Zhang, 2010-01-13, 06:37
Re: about translating Hadoop:The Definitive Guide into chinese one - Hadoop - [mail # general]
...Hi Wang,  This is good, I agree with the plan. And this is msn: [EMAIL PROTECTED] We can talk using IM later.    On Sat, Jan 9, 2010 at 10:32 PM, Andrew Wang wr ote:  . m...
   Author: Jeff Zhang, 2010-01-10, 06:35
RE: custom InputFormat - Hadoop - [mail # user]
...Hi valentine,  I am not sure what's your first job's OutputFormat. But I suggest you  use SequenceFileOutputFormat which will write to SequenceFile as the intermediate data store f...
   Author: Jeff Zhang, 2010-01-09, 20:06
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