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Re: Started learning Hadoop. Which distribution is best for native install in pseudo distributed mode? - Hadoop - [mail # user]
...On that note, 2 is also misleading/incomplete.  You might want to explainwhich specific features you are referencing so the original poster canfigure out if those features are relevant....
   Author: Aaron Eng, 2014-08-12, 21:31
Re: Cloudera Vs Hortonworks Vs MapR - MapReduce - [mail # user]
...Raj,  As others noted, this is not a great place for this discussion.  I'd suggest contacting the vendors you are interested in as I'm sure we'd all be happy to provide you more de...
   Author: Aaron Eng, 2013-09-12, 18:14
Re: rack awareness in hadoop - MapReduce - [mail # user]
...The problem is probably not related to the JVM memory so much as the Linux memory manager.  The exception is in java.lang.UNIXProcess.(UNIXProcess.java:148) which would imply this is ha...
   Author: Aaron Eng, 2013-04-20, 23:19
Re: Hadoop throughput question - HDFS - [mail # user]
...If from the same machine, you can read the raw data of the file at 70MB/s and when reading it using SequenceFile you get 26MB/sec, I would presume that the speed difference comes down to the...
   Author: Aaron Eng, 2013-01-04, 00:10
Re: Why they recommend this (CPU) ? - MapReduce - [mail # user]
...Without a doubt, there are many CPU intensive workloads where the amount of CPU cycles consumed to process some amount of data is many times higher than what would be considered relatively n...
   Author: Aaron Eng, 2012-10-11, 19:15
Re: Hadoop failing jobs non zero exit status 7 - MapReduce - [mail # user]
...Hi Robin,  "Task process exit with nonzero status of 7." is being printed by the TaskTracker to indicate the child JVM spawned to run the task attempt in question exited unexpectedly. T...
   Author: Aaron Eng, 2012-09-13, 17:39
[expand - 1 more] - Re: Hadoop on EC2 Managing Internal/External IPs - HDFS - [mail # user]
...Hi Igor,  I don't think theres anything in Hadoop thats going to allow you to have an internal IP assigned to a machines network interface and to have it advertise the external IP. &nbs...
   Author: Aaron Eng, 2012-08-24, 03:52
Re: Regarding design of HDFS - HDFS - [mail # user]
...I think Sesha's questions are about the memory footprint of the namenode and why it has to operate the way it does, why isn't it possible for the existing namenode capabilities to be impleme...
   Author: Aaron Eng, 2011-09-13, 04:16
Re: Hadoop Java Versions - Hadoop - [mail # general]
...should keep the impact of dead nodes in control.  It keeps the impact of dead nodes in control but I don't think thats long-term cost efficient.  As prices of 10GbE go down, the "k...
   Author: Aaron Eng, 2011-06-30, 23:18
Re: Datanode Shows Way Too Much Space Available - HDFS - [mail # user]
...Hey Tim,  In my experience, if you define multiple data dirs, then what HDFS does is something similar to "df " for each dir.  If those dirs happen to be on the same partition, the...
   Author: Aaron Eng, 2011-06-13, 19:25
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