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Re: Simple MapReduce logic using Java API - Hadoop - [mail # user]
...What is the reason of using the queue?"job.getConfiguration().set("mapred.job.queue.name", "exp_dsa");"Is your mapper or reducer even been called?Try adding the override annotation to the ma...
   Author: Shahab Yunus, 2015-03-31, 18:22
Re: cleanup() in hadoop results in aggregation of whole file/not - Hadoop - [mail # user]
...As far as I understand cleanup is called per task. In your case I.e.per map task. To get an overall count or measure, you need to aggregateit yourself after the job is done.One way to do tha...
   Author: Shahab Yunus, 2015-02-28, 13:10
Re: secure checksum in HDFS - Hadoop - [mail # user]
...There seem to be some work done on this here:https://issues.apache.org/jira/browse/HADOOP-92093rd party tool:https://github.com/rdsr/hdfs-checksumRegards,ShahabOn Fri, Feb 20, 2015 at 12:39 ...
   Author: Shahab Yunus, 2015-02-20, 18:09
Re: writing mappers and reducers question - Hadoop - [mail # user]
...Nope. You can use the Standalone setup too to test things. Details here:http://hadoop.apache.org/docs/r2.2.0/hadoop-project-dist/hadoop-common/SingleNodeSetup.html#Standalone_OperationRegard...
   Author: Shahab Yunus, 2015-02-20, 05:46
[expand - 1 more] - Re: Creation of an empty output directory in hadoop filesystem - Hadoop - [mail # user]
...First try:You should use @Override annotation before map and reduce methods so theyare actually called.Like this:*@Override* public void map(LongWritable k,Text v,Context con)throwsIOEx...
   Author: Shahab Yunus, 2015-01-07, 13:26
Re: Write and Read file through map reduce - Hadoop - [mail # user]
...Distributed Cache has been deprecated for a while. You can use the newmechanism, which is functionally the same thing, discussed here in thisthread:http://stackoverflow.com/questions/2123972...
   Author: Shahab Yunus, 2015-01-06, 13:45
Re: FileNotFoundException in distributed mode - Hadoop - [mail # user]
...You should not use DistrubutedCache. It is deprecated.See this:http://stackoverflow.com/questions/21239722/hadoop-distributedcache-is-deprecated-what-is-the-preferred-apiRegards,ShahabOn Mon...
   Author: Shahab Yunus, 2014-12-22, 13:06
Re: DistributedCache - Hadoop - [mail # user]
...Look at this thread. It has alternatives to DistributedCache.http://stackoverflow.com/questions/21239722/hadoop-distributedcache-is-deprecated-what-is-the-preferred-apiBasically you can use ...
   Author: Shahab Yunus, 2014-12-12, 04:25
Re: HDFS block size question - Hadoop - [mail # user]
...Check this out:http://ofirm.wordpress.com/2014/02/01/exploring-the-hdfs-default-value-behaviour/"It seems that the value of *dfs.block.size* is dictated directly by theclient, regarding of t...
   Author: Shahab Yunus, 2014-12-10, 20:39
Re: hadoop data structures - Hadoop - [mail # user]
...Are you asking about the type for the numberOfRuns variable which you aredeclaring as a Java primitive int?If yes, then you can use IntWritable class in Hadoop to define a integervariable wh...
   Author: Shahab Yunus, 2014-12-09, 13:35
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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