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split big files into small ones to later copy - MapReduce - [mail # user]
...I have one 500GB plain-text file in HDFS, and I want to copy locally, to zip it and put it on another machine in a local disk. The problem is that I don't have enough space in the local disk...
   Author: Pedro Sá da Costa, 2013-06-07, 06:03
[expand - 1 more] - Re: Count lines example - MapReduce - [mail # user]
...I made a mistake in my example.  Given 2 files with the same content: file 1  | file 2 A   3  | A  3 B   4  | B  4  gives the output  A &nbs...
   Author: Pedro Sá da Costa, 2013-06-05, 19:13
Print logs in MapReduce example - MapReduce - [mail # user]
...Hi,   I created my mapreduce example for hadoop 2.0.4, and how I print the logs in the console output? The System.out.println(), Logger.getRootLogger(), and Logger.getLogge(MyClass.clas...
   Author: Pedro Sá da Costa, 2013-06-03, 11:21
set HTTPFS in Hadoop 2.0.4 - MapReduce - [mail # user]
...Hi,  I set the HTTFS of Hadoop 2.0.4 to run in the port 3888. Now I want to access the filesystem but I can't do it. Here's the URL that I am using, and the config files. How can I fix ...
   Author: Pedro Sá da Costa, 2013-06-02, 12:56
how launch mapred in hadoop 2.0.4? - MapReduce - [mail # user]
...In hadoop mapreduce there is the need to launch mapred (mapred start), or launching yarn ( $sbin/yarn-daemon.sh start resourcemanager ; sbin/yarn-daemon.sh start nodemanager) is the same thi...
   Author: Pedro Sá da Costa, 2013-06-01, 17:18
distcp in Hadoop 2.0.4 over http? - MapReduce - [mail # user]
...I want to copy HDFS filese over HTTP using distcp, but I can't. It is a problem of configuration that I can't find it. How can I do distcp in Hadoop 2.0.4 over HTTP?  First I set up had...
   Author: Pedro Sá da Costa, 2013-06-01, 16:10
Queues in hadoop 2.0.4 - MapReduce - [mail # user]
...I am using hadoop 2.0.4  1 - Which component manage queues? Is it the jobtracker?  2 - If so, it is possible to define several queues (set mapred.job.queue.name=$QUEUE_NAME;)? &nbs...
   Author: Pedro Sá da Costa, 2013-05-30, 12:25
copy data between hosts and using hdfs proxy. - MapReduce - [mail # user]
...Hi,  I want to copy data between hosts in Hadoop 2.0.4. But the hosts are       using HDFS Proxy on port 3888. I tried with the protocol hftp,       httpfs...
   Author: Pedro Sá da Costa, 2013-05-29, 11:46
[expand - 1 more] - Re: Mapreduce queues - MapReduce - [mail # user]
...In this article ( http://developer.yahoo.com/blogs/hadoop/next-generation-apache-hadoop-mapreduce-scheduler-4141.html), it is referred that the "The Scheduler is responsible for allocating r...
   Author: Pedro Sá da Costa, 2013-05-27, 09:44
HDFS counters - MapReduce - [mail # user]
...I am analyzing some HDFS counters, and I have these questions?  1 - The "HDFS: Number of bytes read" as long as the map tasks read data from the HDFS, or it is a pre-calculated sum befo...
   Author: Pedro Sá da Costa, 2013-05-24, 10:53
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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