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Re: Copy Vs DistCP - MapReduce - [mail # user]
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...Shell 'cp' only works if you use 'fuse', which makes the HDFS file system visible as a Unix mounted file system. Otherwise, Unix programs cannot read or write HDFS files. O...
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Author: Lance Norskog,
2013-04-12, 17:15
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Re: MapReduce on Local files - MapReduce - [mail # user]
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...Everything in a directory tree. No exceptions. I hope it does not follow symbolic links or file system mounts. On 04/02/2013 04:46 AM, Mohammad Tariq wrote: ...
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Author: Lance Norskog,
2013-04-05, 03:59
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[MAPREDUCE-2208] Flexible CSV text parser InputFormat - MapReduce - [issue]
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...CSVTextInputFormat is a configurable CSV parser tuned to most of the csv-style datasets I've found. The Hadoop samples I've seen all FileInputFormat and Mapper<LongWritable,Text>. They...
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http://issues.apache.org/jira/browse/MAPREDUCE-2208
Author: Lance Norskog,
2013-03-20, 18:58
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Re: Encryption in HDFS - MapReduce - [mail # user]
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...Excellent! On 02/25/2013 10:43 PM, Mathias Herberts wrote:...
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Author: Lance Norskog,
2013-02-28, 00:26
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Re: What should I do with a 48-node cluster - MapReduce - [mail # user]
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...You will also be raided by the DEA- too much power for a residence. On 12/20/2012 07:56 AM, Ted Dunning wrote: ...
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Author: Lance Norskog,
2012-12-21, 19:37
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Re: Virtual memory problems on Ubuntu 12.04 (a.k.a. MALLOC_ARENA_MAX or HADOOP-7154) - MapReduce - [mail # user]
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...1) Java uses different variables than 'malloc'. Look up 'Java garbage collection' to find out how it all works. 2) Is this a 32-bit kernel? Or Java version? Those top out at 2.1g addre...
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Author: Lance Norskog,
2012-10-27, 01:45
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Re: Hadoop/Lucene + Solr architecture suggestions? - MapReduce - [mail # user]
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...The problem is finding the documents in the search cluster. Making the indexes in the reducer means the final m/r pass has to segregate the documents according to the distribution function. ...
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Author: Lance Norskog,
2012-10-12, 05:20
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Re: Using a hard drive instead of - MapReduce - [mail # user]
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...This is why memory-mapped files were invented. On Thu, Oct 11, 2012 at 9:34 PM, Gaurav Sharma wrote: Lance Norskog [EMAIL PROTECTED]...
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Author: Lance Norskog,
2012-10-12, 05:01
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Re: Hadoop/Lucene + Solr architecture suggestions? - MapReduce - [mail # user]
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...In the LucidWorks Big Data product, we handle this with a reducer that sends documents to a SolrCloud cluster. This way the index files are not managed by Hadoop. | From: "Ted Dunning"...
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Author: Lance Norskog,
2012-10-11, 02:15
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Re: Legal Matter - MapReduce - [mail # user]
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...Even worse, "Talk Like A Ninja" day is both racist and oddly ineffective. | From: "Russell Jurney" | To: [EMAIL PROTECTED] | Sent: Thursday, September 6, 2012 6:09:28 AM ...
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Author: Lance Norskog,
2012-09-08, 00:59
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