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[expand - 1 more] - Re: Exception happen when start a single node - Hadoop - [mail # user]
...Hi Nachiket,  Thank you for your reply. But I don't think the page you recommend can solve my problem. The problem on your page is try to solve the namespace version incompatibility. Bu...
   Author: Jeff Zhang, 2010-01-29, 14:40
[expand - 1 more] - Re: Fileformat query - Hadoop - [mail # user]
...Sorry for my mistake, the idea of writing your own InputFormat seems not a good idea. The cost of getting the line number of each split is a little high.    On Fri, Jan 29, 2010 at...
   Author: Jeff Zhang, 2010-01-29, 01:54
Re: Cleanup Attempt in Map Task - Hadoop - [mail # user]
...One easy way is to increase the timeout by setting mapred.task.timeout in mapred-site.xml    On Thu, Jan 28, 2010 at 5:59 PM, #YONG YONG CHENG#  wrote:     Best Rega...
   Author: Jeff Zhang, 2010-01-28, 10:24
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
[expand - 1 more] - 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
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB