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Re: HDFS and libhfds - Hadoop - [mail # user]
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...2010/12/7 Petrucci Andreas : problems. According to http://wiki.apache.org/hadoop/MountableHDFS i hav e already installes fuse. With ant compile-c++-libhdfs -Dlibhdfs=1 the bu ils is succes...
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Author: Edward Capriolo,
2010-12-07, 22:22
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Re: small files and number of mappers - Hadoop - [mail # user]
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...On Tue, Nov 30, 2010 at 3:21 AM, Harsh J wrote: MultiFile and ConbinedInputFormats help. JVM Re-use helps. The larger problem is that an average NameNode with 4GB ram will ...
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Author: Edward Capriolo,
2010-11-30, 18:27
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Re: Caution using Hadoop 0.21 - Hadoop - [mail # user]
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...On Sat, Nov 13, 2010 at 4:33 PM, Shi Yu wrote: At times we have been frustrated by rapidly changing API's # 23 August, 2010: release 0.21.0 available # 26 February, 2010: r...
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Author: Edward Capriolo,
2010-11-14, 04:53
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Re: 0.21 found interface but class was expected - Hadoop - [mail # user]
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...On Sat, Nov 13, 2010 at 9:50 PM, Todd Lipcon wrote: ons en f on, wer at e s an s Cloudera and Yahoo have back ported the interesting security components and some enhancements int...
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Author: Edward Capriolo,
2010-11-14, 03:19
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Re: Why hadoop is written in java? - Hadoop - [mail # user]
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...On Tue, Oct 12, 2010 at 12:20 AM, Chris Dyer wrote: te: c. hout read d. ther en k 148p1684291.html Hate to say it this way... but yet another "java is slow compared to the equiva...
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Author: Edward Capriolo,
2010-10-13, 01:19
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Re: hd fs -head? - Hadoop - [mail # user]
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...On Mon, Sep 27, 2010 at 11:13 AM, Keith Wiley wrote ou ent ven _______ ng -- Homer Simpson _______ 'hadoop dfs -cat' will output the file as it is read. head -5 will kill ...
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Author: Edward Capriolo,
2010-09-27, 20:46
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Re: A new way to merge up those small files! - Hadoop - [mail # user]
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...Ted, Good point. Patches are welcome :) I will add it onto my to-do list. Edward On Sat, Sep 25, 2010 at 12:05 PM, Ted Yu wrote:...
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Author: Edward Capriolo,
2010-09-27, 14:04
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Re: hd fs -head? - Hadoop - [mail # user]
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...On Mon, Sep 27, 2010 at 3:23 AM, Keith Wiley wrote: rts _______ th -- Galileo Galilei _______ Tail is needed to be done efficiently but head you can just do yourself. Most...
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Author: Edward Capriolo,
2010-09-27, 14:02
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A new way to merge up those small files! - Hadoop - [mail # user]
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...Many times a hadoop job produces a file per reducer and the job has many reducers. Or a map only job one output file per input file and you have many input files. Or you just have many small...
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Author: Edward Capriolo,
2010-09-25, 06:41
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Re: Cannot run program "bash": java.io.IOException - Hadoop - [mail # user]
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...This happens because child processes try to allocate the same memory as the parent. One way to solve this is setting memory overcommit to your linux system. On Sat, Sep 18, 2010 at 4:4...
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Author: Edward Capriolo,
2010-09-18, 14:21
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