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[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
[expand - 1 more] - Re: to get hadoop working around with multiple users on the same instance - Hadoop - [mail # user]
...On Fri, Nov 20, 2009 at 4:39 PM, Siddu  wrote:   *    You can still connect the machine if it run  pseudo distributed file system. But in the configuration files, us...
   Author: Jeff Zhang, 2009-11-20, 09:46
[expand - 1 more] - Re: architecture help - Hadoop - [mail # user]
...The easiest way is making your connection pool class as the static member of your mapper class.   Jeff Zhang   On Mon, Nov 16, 2009 at 7:33 AM, yz5od2 wrote:  ...
   Author: Jeff Zhang, 2009-11-16, 16:49
Re: no jobtracker to stop,no namenode to stop - Hadoop - [mail # user]
...look at the logs of job tracker, maybe you will get some clues.   Jeff Zhang    On Mon, Nov 16, 2009 at 6:45 AM, Prabhu Hari Dhanapal  wrote:  ...
   Author: Jeff Zhang, 2009-11-16, 14:57
Re: Any Way to SSH to a remote Hadoop Machine - Hadoop - [mail # user]
...Of course, you can ssh to remote hadoop cluster.  And also you can edit and compile your code outside cluster, and then submit your jar to cluster to execute your map reduce jobs.  ...
   Author: Jeff Zhang, 2009-11-16, 06:34
Re: How hard would it be to put Hadoop on an EC2 machine? - Hadoop - [mail # user]
...You can use the distribution of cloudera, it's very easy to install hadoop on ec2.  http://archive.cloudera.com/docs/ec2.html   Jeff Zhang   On Mon, Nov 16, 2009 at 1:24 PM, M...
   Author: Jeff Zhang, 2009-11-16, 05:34
[expand - 1 more] - Re: Where is the eclipse plug-in for hadoop 0.20.1 - Hadoop - [mail # user]
...Hi Stephen,  Thank you. It works   Jeff Zhang    On Mon, Nov 9, 2009 at 10:31 PM, Stephen Watt  wrote:  ...
   Author: Jeff Zhang, 2009-11-10, 09:53
Re: Problem with Hadoop - Hadoop - [mail # user]
...You can change the heapsize for child jvm by setting mapred.child.java.opts to -Xmx512m  The default heapsize is 200m which may be not enough for you, since Hama is matrix computing fra...
   Author: Jeff Zhang, 2009-11-10, 05:01
Re: Re: how to read file in hadoop - Hadoop - [mail # user]
...Maybe you can download the file to local to see what content is there.   Jeff Zhang   2009/11/10 Gang Luo   nd ms ite y) �) 11:47:02 上午 int  I n 邮箱贺卡全新上线� �� 邮箱贺卡全新上线� ��...
   Author: Jeff Zhang, 2009-11-10, 04:58
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