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From Mohit Anchlia <mohitanch...@gmail.com>
Subject Re: Moving Files to Distributed Cache in MapReduce
Date Fri, 29 Jul 2011 20:59:10 GMT
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On Fri, Jul 29, 2011 at 1:51 PM, Roger Chen <rogchen@ucdavis.edu> wrote:
> Thanks for the response! However, I'm having an issue with this line
>
> Path[] cacheFiles = DistributedCache.getLocalCacheFiles(conf);
>
> because conf has private access in org.apache.hadoop.configured
>
> On Fri, Jul 29, 2011 at 11:18 AM, Mapred Learn <mapred.learn@gmail.com>wrote:
>
>> I hope my previous reply helps...
>>
>> On Fri, Jul 29, 2011 at 11:11 AM, Roger Chen <rogchen@ucdavis.edu> wrote:
>>
>> > After moving it to the distributed cache, how would I call it within my
>> > MapReduce program?
>> >
>> > On Fri, Jul 29, 2011 at 11:09 AM, Mapred Learn <mapred.learn@gmail.com
>> > >wrote:
>> >
>> > > Did you try using -files option in your hadoop jar command as:
>> > >
>> > > /usr/bin/hadoop jar <jar name> <main class name> -files  <absolute
path
>> > of
>> > > file to be added to distributed cache> <input dir> <output
dir>
>> > >
>> > >
>> > > On Fri, Jul 29, 2011 at 11:05 AM, Roger Chen <rogchen@ucdavis.edu>
>> > wrote:
>> > >
>> > > > Slight modification: I now know how to add files to the distributed
>> > file
>> > > > cache, which can be done via this command placed in the main or run
>> > > class:
>> > > >
>> > > >        DistributedCache.addCacheFile(new
>> > URI("/user/hadoop/thefile.dat"),
>> > > > conf);
>> > > >
>> > > > However I am still having trouble locating the file in the
>> distributed
>> > > > cache. *How do I call the file path of thefile.dat in the distributed
>> > > cache
>> > > > as a string?* I am using Hadoop 0.20.2
>> > > >
>> > > >
>> > > > On Fri, Jul 29, 2011 at 10:26 AM, Roger Chen <rogchen@ucdavis.edu>
>> > > wrote:
>> > > >
>> > > > > Hi all,
>> > > > >
>> > > > > Does anybody have examples of how one moves files from the local
>> > > > > filestructure/HDFS to the distributed cache in MapReduce? A Google
>> > > search
>> > > > > turned up examples in Pig but not MR.
>> > > > >
>> > > > > --
>> > > > > Roger Chen
>> > > > > UC Davis Genome Center
>> > > > >
>> > > >
>> > > >
>> > > >
>> > > > --
>> > > > Roger Chen
>> > > > UC Davis Genome Center
>> > > >
>> > >
>> >
>> >
>> >
>> > --
>> > Roger Chen
>> > UC Davis Genome Center
>> >
>>
>
>
>
> --
> Roger Chen
> UC Davis Genome Center
>

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