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[HADOOP-10978] HADOOP_IDENT_STRING is overriden in hadoop-env.sh - Hadoop - [issue]
...hadoop-env.sh forces HADOOP_IDENT_STRING to $USER possibly overriding a previously set value.Instead hadoop-env.sh should set HADOOP_IDENT_STRING to:export HADOOP_IDENT_STRING=${HADOOP_IDENT...
http://issues.apache.org/jira/browse/HADOOP-10978    Author: Mathias Herberts, 2014-08-19, 15:37
Re: [VOTE] Release Apache Hadoop 2.2.0 - Hadoop - [mail # dev]
...Kudos to all!   On Wed, Oct 16, 2013 at 6:35 AM, Arun C Murthy  wrote:  ...
   Author: Mathias Herberts, 2013-10-16, 07:04
Re: Hadoop on physical Machines compared to Amazon Ec2 / virtual machines - Hadoop - [mail # user]
...Correct me if I'm wrong, but the sole cost of storing 300TB on AWS will account for roughly 300000*0.10*12 = 360000 USD per annum.  We operate a cluster with 112 nodes offering 800+ TB ...
   Author: Mathias Herberts, 2012-05-31, 18:50
Re: is hadoop suitable for us? - Hadoop - [mail # user]
...Hadoop does not perform well with shared storage and vms.  The question should be asked first regarding what you're trying to achieve, not about your infra. On May 17, 2012 10:39 PM, "P...
   Author: Mathias Herberts, 2012-05-17, 20:41
Re: Pig question - Hadoop - [mail # user]
...B = GROUP A BY x;  C = FOREACH B GENERATE group,SIZE(B),B;  D = FILTER C BY $1 == N;    On Thu, May 3, 2012 at 8:58 PM, Aleksandr Elbakyan  wrote:...
   Author: Mathias Herberts, 2012-05-03, 19:04
Re: Temporal query - Hadoop - [mail # user]
...rather easy to do in Pig with a UDF, filter values > threshold, Group ALL, then nested foreach which does an order by on the timestamp and calls your UDF on the sorted bag in the generate...
   Author: Mathias Herberts, 2012-03-29, 17:34
Re: Problem setting super user - Hadoop - [mail # user]
...does it work under user hdfs? On Mar 19, 2012 6:32 PM, "Olivier Sallou"  wrote:  ...
   Author: Mathias Herberts, 2012-03-19, 17:39
Re: how to compress log files with snappy compression - Hadoop - [mail # user]
...write a simple java class that creates a snappy compressed seqfile. On Dec 31, 2011 11:17 PM, "ravikumar visweswara"  wrote:  ...
   Author: Mathias Herberts, 2011-12-31, 22:29
[expand - 2 more] - Re: Grouping in Combiners - Hadoop - [mail # user]
...Not one I can think of at the moment, but intuitively that's the kind of flexibility I would like to see should a grouping comparator become configurable for Combiners.  By pushing your...
   Author: Mathias Herberts, 2011-10-31, 21:13
Hadoop MapReduce Poster - Hadoop - [mail # user]
...Hi,  I'm in the process of putting together a 'Hadoop MapReduce Poster' so my students can better understand the various steps of a MapReduce job as ran by Hadoop.  I intend to rel...
   Author: Mathias Herberts, 2011-10-31, 13:14
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