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Re: change yarn application priority - Hadoop - [mail # user]
...WRT capacity scheduler, its not so much changing the priority of a job, but allowing for pre-emption.  Note that I guess you could raise the one job's priority, and then the other job's...
   Author: Michael Segel, 2014-06-03, 12:13
How can a task know if its running as a MR1 or MR2 job? - Hadoop - [mail # user]
...Just a quick question... Suppose you have a M/R job running. How does the Mapper or Reducer task know or find out if its running as a M/R 1 or M/R 2 job? I would suspect the job context woul...
   Author: Michael Segel, 2014-06-03, 12:04
Re: rack awarness unexpected behaviour - Hadoop - [mail # user]
...Marc,   The rack aware script is an artificial concept. Meaning you can tell which machine is in which rack and that may or may not reflect where the machine is actually located.  ...
   Author: Michael Segel, 2013-10-03, 12:23
Re: Abstraction layer to support both YARN and Mesos - Hadoop - [mail # user]
...Actually,  I am interested.   Lots of different Apache top level projects seem to overlap and it can be confusing.  Its very easy for a good technology to get starved because ...
   Author: Michael Segel, 2013-07-29, 15:06
Re: Aggregating data nested into JSON documents - Hadoop - [mail # user]
...I think you have a misconception of HBase.   You don't need to actually have mutable data for it to be effective.  The key is that you need to have access to specific records and w...
   Author: Michael Segel, 2013-06-13, 22:05
Re: Recovering the namenode from failure - Hadoop - [mail # user]
...I think what he's missing is to change the configurations to point to the new name node.   It sounds like the new NN has a different IP address from the old NN so the DNs don't know who...
   Author: Michael Segel, 2013-05-21, 16:33
Re: Project ideas - Hadoop - [mail # user]
...Drink heavily?   Sorry.  Let me rephrase.  Part of the exercise is for you, the student to come up with the idea. Not solicit someone else for a suggestion.  This is how ...
   Author: Michael Segel, 2013-05-21, 13:46
[expand - 1 more] - Re: how to get the time of a hadoop cluster, v0.20.2 - Hadoop - [mail # user]
...Then you have a problem where the solution is more of people management and not technical.   All of your servers should be using NTP.  At a minimum, you have one server that gets t...
   Author: Michael Segel, 2013-05-18, 15:54
Re: How can I record some position of context in Reduce()? - Hadoop - [mail # user]
...Hi,  Your cross join is supported in both pig and hive. (Cross, and Theta joins)   So there must be code to do this.   Essentially in the reducer you would have your key and t...
   Author: Michael Segel, 2013-04-09, 13:08
Re: Database insertion by HAdoop - Hadoop - [mail # user]
...Nope HBase wasn't mentioned.  The OP could be talking about using external tables and Hive.   The OP could still be stuck in the RDBMs world and hasn't flattened his data yet. &nbs...
   Author: Michael Segel, 2013-02-18, 16:57
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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