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How bad is this? :) - MapReduce - [mail # user]
...Hey Hadoop smart folks....  I have a tendency to seek optimum performance given my understanding, so that led to me "brilliant" decision.  We settled on EXT4 for our underlying FS ...
   Author: Chris Embree, 2013-07-09, 02:12
Re: Where to begin from?? - MapReduce - [mail # user]
...I'll be chastised and have mean things said about me for this.  Get some experience in IT before you start looking at Hadoop.  My reasoning is this:  If you don't know how to ...
   Author: Chris Embree, 2013-05-24, 02:47
Re: Low latency data access Vs High throughput of data - MapReduce - [mail # user]
...I'll take a swing at this one.  Low latency data access:  I hit the enter key (or submit button) and I expect results within seconds at most.  My database query time should be...
   Author: Chris Embree, 2013-05-20, 17:51
Re: About configuring cluster setup - MapReduce - [mail # user]
...It's not a good idea for anything more than Proof of Concept or Sandbox clusters.   On Tue, May 14, 2013 at 3:10 AM, Leonid Fedotov wrote:  ...
   Author: Chris Embree, 2013-05-14, 12:36
[expand - 2 more] - Re: Rack Aware Hadoop cluster - MapReduce - [mail # user]
...Here is a sample I stole from the web and modified slightly... I think.  HADOOP_CONF=/etc/hadoop/conf  while [ $# -gt 0 ] ; do   nodeArg=$1   exec wrote:  ...
   Author: Chris Embree, 2013-05-08, 20:49
Re: Run multiple HDFS instances - MapReduce - [mail # user]
...Glad you got this working... can you explain your use case a little?   I'm trying to understand why you might want to do that.   On Thu, Apr 18, 2013 at 11:29 AM, Lixiang Ao  ...
   Author: Chris Embree, 2013-04-18, 15:52
Re: Cluster lost IP addresses - MapReduce - [mail # user]
...Hey John,  Make sure your /etc/hosts ( or DNS) is up to date and  any topology scripts are updated.  Unfortunately, NN is pretty dumb about IP's vs. Hostnames.  BTW, NN d...
   Author: Chris Embree, 2013-03-23, 05:22
Topology script frequency - MapReduce - [mail # user]
...I've checked all of the documentation, books and google searches I can think of....  I have a working topology script.  I have dynamic IP's.  I have an automated process to up...
   Author: Chris Embree, 2013-02-20, 20:17
Re: How to add users in supergroup? - MapReduce - [mail # user]
...Check your HDFS config file for the groupname you used as HDFS supergroup.  We used hdfs as the group name in our case.  Then just groupadd hdfs  (see man groupadd for additio...
   Author: Chris Embree, 2013-02-14, 16:55
Re: Mutiple dfs.data.dir vs RAID0 - MapReduce - [mail # user]
...Interesting question.  You'd probably need to benchmark to prove it out.  I'm not the exact details of how HDFS stripes data, but it should compare pretty well to hardware RAID. &n...
   Author: Chris Embree, 2013-02-11, 02:22
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