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Re: YARN userapp cache lifetime: can't find core dump - Hadoop - [mail # user]
...Perhaps the following? I get the application logs from here after jobcompletion. This is path on hdfs.yarn.nodemanager.remote-app-log-dirRegards,ShahabOn Tue, Sep 2, 2014 at 4:02 PM, John Li...
   Author: Shahab Yunus, 2014-09-02, 20:13
[expand - 1 more] - Re: job.getCounters returns null in Yarn-based job - Hadoop - [mail # user]
...For those who are interested, this got resolved.The issue was that I was creating more counters than what was configured inthe settings.I upped mapreduce.job.counters.max property to a large...
   Author: Shahab Yunus, 2014-08-23, 00:40
Re: Hadoop InputFormat - Processing large number of small files - Hadoop - [mail # user]
...Have you looked at the WholeFileInputFormat implementations? There arequite a few if search for them...http://hadoop-sandy.blogspot.com/2013/02/wholefileinputformat-in-java-hadoop.htmlhttps:...
   Author: Shahab Yunus, 2014-08-20, 13:19
Relationship between number of reducers and number of regions in the table - Hadoop - [mail # user]
...I couldn't decide that whether it is an HBase question or Hadoop/Yarn.In the utility class for MR jobs integerated with HBase,*org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil, *in the m...
   Author: Shahab Yunus, 2014-08-14, 12:23
Re: One datanode is down then write/read starts failing - Hadoop - [mail # user]
...The reason being that when you write something in HDFS, it guarantees thatit will be written to the specified number of replicas. So if yourreplication factor is 2 and one of your node (out ...
   Author: Shahab Yunus, 2014-07-28, 17:07
Re: Difference between different tar - Hadoop - [mail # user]
...The '-bin' file does not have the source code (bin for binaries) while theother does. You can check and see the major difference in the 'src' foldersunder the top-level directory after unzip...
   Author: Shahab Yunus, 2014-07-21, 13:00
Re: Data cleansing in modern data architecture - Hadoop - [mail # user]
...I am assuming you meant the batch jobs that are/were used in old world fordata cleansing.As far as I understand there is no hard and fast rule for it and it dependsfunctional and system requ...
   Author: Shahab Yunus, 2014-07-20, 21:20
[expand - 1 more] - Re: Merging small files - Hadoop - [mail # user]
...Why it isn't appropriate to discuss too much vendor specific topics on avendor-neutral apache mailing list? Checkout this thread:http://mail-archives.apache.org/mod_mbox/hadoop-mapreduce-use...
   Author: Shahab Yunus, 2014-07-20, 16:32
Re: what exactly does data in HDFS look like? - Hadoop - [mail # user]
...The data itself is eventually store in a form of file. Each blocks of thefile and it replicas are stored in files and directories on differentnodes. The Namenode that keep the information an...
   Author: Shahab Yunus, 2014-07-19, 05:03
[expand - 1 more] - Re: Providing a file instead of a directory to a M/R job - Hadoop - [mail # user]
...That is what I thought so too but when I give the parent directory as theinput path of that same file, it works. Perhaps I am messing something up.I am suing cloudera 4.6 btw.Meanwhile I hav...
   Author: Shahab Yunus, 2014-07-17, 15:27
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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