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Re: - Hadoop - [mail # user]
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...In my opinion, another 2782829 times, give or take a few. Or try reading and understanding http://hadoop.apache.org/mailing_lists.html otherwise which tells you to send an email to [EM...
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Author: Kai Voigt,
2013-03-06, 13:04
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Re: aggregation by time window - Hadoop - [mail # user]
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...Hi again, the idea is that you emit every event multiple times. So your map input record (event1, 10:07) will be emitted seven times during the map() call. Like I said, (10:04,event1),...
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Author: Kai Voigt,
2013-01-28, 13:48
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Re: aggregation by time window - Hadoop - [mail # user]
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...Quick idea: since each of your events will go into several buckets, you could use map() to emit each item multiple times for each bucket. Am 28.01.2013 um 13:56 schrieb Oleg Ruch...
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Author: Kai Voigt,
2013-01-28, 13:17
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Re: Get the name of node where mapper is running - Hadoop - [mail # user]
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...Hello, the JobTracker has a built-in Web UI (http://hostname_of_jobtracker:50030/) where you can get details for all completed and running jobs. For the map phase, it will tell you on ...
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Author: Kai Voigt,
2012-11-21, 18:06
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Re: Transfer large file >50Gb with DistCp from s3 to cluster - Hadoop - [mail # user]
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...Hi, my guess is that you run "hadoop distcp" on one of the datanodes... In that case, the node will get the first replica of each block. But you should also see copies on m...
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Author: Kai Voigt,
2012-09-04, 20:09
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Re: Hadoop or HBase - Hadoop - [mail # user]
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...Having a distributed filesystem doesn't save you from having backups. If someone deletes a file in HDFS, it's gone. What backend storage is supported by your CMS? Kai ...
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Author: Kai Voigt,
2012-08-28, 10:18
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Re: Hadoop or HBase - Hadoop - [mail # user]
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...Typically, CMSs require a RDBMS. Which Hadoop and HBase are not. Which CMS do you plan to use, and what's wrong with MySQL or other open source RDBMSs? Kai Am 28.08.2...
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Author: Kai Voigt,
2012-08-28, 06:26
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Re: Simple hadoop processes/testing on windows machine - Hadoop - [mail # user]
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...I suggest using a virtual machine with all required services installed and configured. Cloudera offers a distribution as a VM, at https://ccp.cloudera.com/display/SUPPORT/C...
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Author: Kai Voigt,
2012-07-25, 22:15
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Re: Counting records - Hadoop - [mail # user]
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...Hi, an additional idea is to use the counter API inside the framework. http://diveintodata.org/2011/03/15/an-example-of-hadoop-mapreduce-counter/ has a good example. ...
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Author: Kai Voigt,
2012-07-23, 14:32
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Re: HDFS APPEND - Hadoop - [mail # dev]
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...Hello, Am 13.07.2012 um 22:19 schrieb abhiTowson cal: Yes!! Check out http://archive.cloudera.com/cdh4/cdh/4/hadoop/api/org/apache/hadoop/fs/Fil eSystem.html#append(...
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Author: Kai Voigt,
2012-07-13, 20:23
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