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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: 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: 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
[expand - 1 more] - Re: HDFS Corruption: How to Troubleshoot or Determine Root Cause? - HDFS - [mail # user]
...usability issues like this and scoff about "newbies". P.S. This is speaking from the newbie perspective, it was not meant as a slight to contributors in any way.  Just a comment on the ...
   Author: Aaron Eng, 2011-05-18, 23:55
Re: odd temp dir created in hdfs from hdfs-site.xml file setting? - HDFS - [mail # user]
...hadoop.tmp.dir is supposed a location the local file system, not a directory within HDFS.  That value should also be in core-site.xml instead of hdfs-site.xml.  That might be the c...
   Author: Aaron Eng, 2010-12-09, 01:03
[expand - 2 more] - Re: wordcount example using local file system instead of distributed one? - HDFS - [mail # user]
...Each of the config files can be used to set only specific configuration values.  So even though you had a valid config property/value, it didn't apply because it wasn't in the right fil...
   Author: Aaron Eng, 2010-12-08, 23:30
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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