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Re: Large number of small files - Hadoop - [mail # user]
...Marko,Cassandra is an noSQL DB like HBase for Hadoop is. Pro and cons wouldn't be discussed here.Parquet is an columnar based storage format. It is - high level - a bit like a NoSQL DB, but ...
   Author: Alexander Alten-Lorenz, 2015-04-24, 09:19
Re: ResourceLocalizationService: Localizer failed when running pi example - Hadoop - [mail # user]
...As you said, that looks like a config issue. I would spot on the NM's local scratch dir (yarn.nodemanager.local-dirs). But without a complete stack trace, its a blind call.BR, ALmapredi...
   Author: Alexander Alten-Lorenz, 2015-04-19, 16:00
Re: Data doesn't write in HDFS - Hadoop - [mail # user]
...Hi Have a closer look at:java.io.IOException: File /testing/syncfusion/C#/JMS_message.1427429746967.log.tmp could only be replicated to 0 nodes instead of minReplication (=1).  There ar...
   Author: Alexander Alten-Lorenz, 2015-03-27, 11:07
[expand - 1 more] - Re: Total memory available to NameNode - Hadoop - [mail # user]
...Ah, yes. Toms book is a good start, and Eric Sammers book Hadoop Operations too :) BR, AL ...
   Author: Alexander Alten-Lorenz, 2015-03-26, 11:03
Re: Trusted-realm vs default-realm kerberos issue - Hadoop - [mail # user]
...Do you have mapping rules, which tells Hadoop that the trusted realm is allowed to login? http://mapredit.blogspot.de/2015/02/hadoop-and-trusted-mitv5-kerberos-with.html BR, Alex ...
   Author: Alexander Alten-Lorenz, 2015-03-25, 09:29
Re: Impala CREATE TABLE AS AVRO Requires "Redundant" Schema - Why? - Hadoop - [mail # user]
...Hi,Impala is a product of Cloudera. You might request help per:https://groups.google.com/a/cloudera.org/forum/#!forum/impala-user BR,  Alex ...
   Author: Alexander Alten-Lorenz, 2015-02-26, 17:22
Re: Ambari based uninstall - Hadoop - [mail # user]
...Steve,I wrote up that howto some month ago, worth to test?http://mapredit.blogspot.de/2014/06/remove-hdp-and-ambari-completely.html R, Alexander  ...
   Author: Alexander Alten-Lorenz, 2015-02-26, 15:32
Re: mssql bulk copy dat files - Hadoop - [mail # user]
...Not per default. But you can use sqoop to offload the DBs into something-delimited text.http://mapredit.blogspot.de/2011/10/sqoop-and-microsoft-sql-server.html http://www.microsoft.com/en-us...
   Author: Alexander Alten-Lorenz, 2015-02-23, 11:09
[expand - 1 more] - Re: recombining split files after data is processed - Hadoop - [mail # user]
...You could attach the hadoop dfs command per bootstrap.http://stackoverflow.com/questions/12055595/emr-how-to-join-files-into-one BR, Alex ...
   Author: Alexander Alten-Lorenz, 2015-02-23, 08:44
[expand - 4 more] - Re: Yarn AM is abending job when submitting a remote job to cluster - Hadoop - [mail # user]
...Hm, hitting enter to fast:… from a client which isn’t part of a cluster ...... ...
   Author: Alexander Alten-Lorenz, 2015-02-23, 07:02
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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