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RE: Map output copy failure - MapReduce - [mail # user]
...I had the same problem yesterday, it sure does look to be dead on that issue. I found another forum discussion on AWS that suggested more memory as a stop-gap way to deal with it, or apply t...
   Author: David Parks, 2012-12-12, 06:15
RE: Hadoop Deployment usecases - MapReduce - [mail # user]
...You're likely to find answers to your questions here, but you'll need specific questions and some rudimentary subject matter knowledge. I'd suggest starting off with a good book on Hadoop, y...
   Author: David Parks, 2012-12-12, 06:10
RE: Hadoop 101 - MapReduce - [mail # user]
...You use TextInputFormat, you'll get the following key, value pairs in your mapper:  file_position, your_input  Example: 0, "0\t[356:0.3481597,359:0.3481597,358:0.3481597,361:0.3481...
   Author: David Parks, 2012-12-12, 06:04
XMLOutputFormat, anything in the works? - MapReduce - [mail # user]
...Is there an XMLOutputFormat in existence somewhere? I need to output Solr XML change docs, I'm betting I'm not the first.  David...
   Author: David Parks, 2012-11-19, 12:22
[expand - 2 more] - RE: Cluster wide atomic operations - MapReduce - [mail # user]
...That's a very helpful discussion. Thank you.     I'd like to go with assigning blocks of IDs for each reducer. Snowflake would require external changes that are a pain, I'd rather ...
   Author: David Parks, 2012-10-29, 06:54
MultipleOutputs directed to two different locations - MapReduce - [mail # user]
...I've got MultipleOutputs configured to generate 2 named outputs. I'd  like to send one to s3n:// and one to hdfs://  Is this possible?  One is a final summary report, the othe...
   Author: David Parks, 2012-10-26, 01:44
RE: How do map tasks get assigned efficiently? - MapReduce - [mail # user]
...So the thing that just doesn't click for me yet is this:     On a typical computer, if I try to read two huge files off disk simultaneously it'll just kill the disk performance. Th...
   Author: David Parks, 2012-10-25, 02:49
[expand - 2 more] - RE: Large input files via HTTP - MapReduce - [mail # user]
...Would it make sense to write a map job that takes an unsplittable XML  file (which defines all of the files I need to download); that one map job  then kicks off the downloads in m...
   Author: David Parks, 2012-10-23, 00:59
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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