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[expand - 1 more] - Re: Hodoop namenode startup problem - Hadoop - [mail # user]
...I've fixed the problem.  The reason namenode won't start was that I accidentally started the cluster with root account. This somehow changed the ownership of some hadoop-related files(e...
   Author: edward choi, 2010-08-05, 06:07
Re: Inputs of Mapreduce - Hadoop - [mail # user]
...Khaled,  Hadoop mapreduce innately takes in file line by line. XML files are not comprised of single lines. So you will have to pack a single xml document into a single line. Or you can...
   Author: edward choi, 2010-07-13, 09:24
[expand - 1 more] - Re: Is "heap size allocation" of namenode dynamic or static? - Hadoop - [mail # user]
...Hemanth,  Thank you for the elaborate explanation. First of all, The total swap memory size is over 4 giga bytes, but the actual used size around several hundred kilo bytes. So I guess ...
   Author: edward choi, 2010-07-09, 14:26
[expand - 2 more] - Re: How to control the number of map tasks for each nodes? - Hadoop - [mail # user]
...Mike,  Thanks for the heads up. Actually, my i7s are 930. Does this make any difference?  Ed  2010/7/9 Michael Segel  ...
   Author: edward choi, 2010-07-09, 01:42
[expand - 1 more] - Re: How do I remove "Non DFS Used"? - Hadoop - [mail # user]
...Thank you for the responses. But I think I figured out the reason for 800GB of "Non DFS Used" The space was being used by another user who has about 750GB of data files.  So after all, ...
   Author: edward choi, 2010-07-08, 00:21
[expand - 5 more] - Re: how to figure out the range of a split that failed? - Hadoop - [mail # user]
...Thanks for the tip. I actually already have tried your method. The command I wrote is like below  cerr Y�i��#8;�璽#6;��Fb賃$x좃_�W�L �\F#12;�g#7;i�Ix8#22;#25;���廟別HywK�\Dz觴���U��(����/����...
   Author: edward choi, 2010-07-06, 05:07
How do I configure 'Skipbadrecords' in Hadoop Streaming? - Hadoop - [mail # user]
...HI,  I am trying to use hadoop streaming and there seems to be a few bad records in my data.  I'd like to use Skipbadrecords but I can't find how to use it in hadoop streaming. &nb...
   Author: edward choi, 2010-06-15, 01:03
[expand - 1 more] - Re: Hadoop cannot find my mapper class - Hadoop - [mail # user]
...I have solved this problem. I used to declare the package of LangAnal.java as "org.etri.mp2893" But when I changed it to "org.myorg", the problem was gone. This is really baffling. Does anyb...
   Author: edward choi, 2010-06-07, 05:15
[expand - 1 more] - Re: JNI native library loading problem in standalone mode - Hadoop - [mail # user]
...Alex,  Thanks for your advice. I tried both of them and neither works. I am still getting the UnsatisfiedLinkError when I try to run my application in StandAlone mode.  I also made...
   Author: edward choi, 2010-06-01, 01:20
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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