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Re: Accessing Hadoop using Kerberos - Hadoop - [mail # user]
...Hadoop UserGroupInformation class looks into the OS Kerberos cache for user to use.  I guess you'd had to do the kerberos authentication making sure the kerberos cache is used and then ...
   Author: Alejandro Abdelnur, 2011-01-13, 06:32
Re: how to run jobs every 30 minutes? - Hadoop - [mail # user]
...Ed,  Actually Oozie is quite different from Cascading.  * Cascading allows you to write 'queries' using a Java API and they get translated into MR jobs. * Oozie allows you compose ...
   Author: Alejandro Abdelnur, 2010-12-14, 09:30
Re: Multiple hadoop configurations - Hadoop - [mail # general]
...Deepika,  If both of your clusters run the same version of Hadoop, then -as Konstantin suggested- you could use Oozie. Oozie does not rely on local Hadoop configuration files to determi...
   Author: Alejandro Abdelnur, 2010-12-10, 01:16
Re: HDFS Rsync process?? - Hadoop - [mail # user]
...The other approach, if the DR cluster is idle or has enough excess capacity, would be running all the jobs on the input data in both clusters and perform checksums on the outputs to ensure e...
   Author: Alejandro Abdelnur, 2010-11-30, 11:18
Re: running hadoop jobs from within a program - Hadoop - [mail # general]
...Mac,  You should a look at Oozie, it will allow you to do what you describe.  You can either build Oozie from https://github.com/yahoo/oozie or download CDH3b3 distribution from ht...
   Author: Alejandro Abdelnur, 2010-11-12, 09:30
Re: Hadoop code reviews on ReviewBoard? - Hadoop - [mail # general]
...Hey Konstantin,  have you seen how you can comment on patches and see side by side the changes in RB?  It is quite handy.  Alejandro  On Thu, Nov 4, 2010 at 2:15 PM, Kons...
   Author: Alejandro Abdelnur, 2010-11-04, 06:19
Re: how to set diffent VM parameters for mappers and reducers? - Hadoop - [mail # user]
...Never used those myself, always used the global one, but I knew they are there.  Which Hadoop API are you using, the old one or the new one?  Alejandro  On Fri, Oct 8, 2010 at...
   Author: Alejandro Abdelnur, 2010-10-07, 23:08
Re: Combiner and MultipleOutputs in Mapreduce - Hadoop - [mail # dev]
...Shi,  When named outputs are used within a Mapper implementation, key/values written to a name output are not part of the reduce phase, only key/values written to the job OutputCollecto...
   Author: Alejandro Abdelnur, 2010-10-06, 04:54
Re: Re: Help!!The problem about Hadoop - Hadoop - [mail # user]
...Or you could try using MultiFileInputFormat for your MR job.  http://hadoop.apache.org/mapreduce/docs/current/api/org/apache/hadoop/mapre d/MultiFileInputFormat.html  Alejandro &nb...
   Author: Alejandro Abdelnur, 2010-10-05, 10:07
Re: is there no streaming.jar file in hadoop-0.21.0?? - Hadoop - [mail # user]
...Edward,  Yep, you should use the one from contrib/  Alejandro  On Tue, Oct 5, 2010 at 1:55 PM, edward choi  wrote:...
   Author: Alejandro Abdelnur, 2010-10-05, 10:00
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