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Posted to common-dev@hadoop.apache.org by Upendra Dadi <ud...@gmu.edu> on 2009/11/27 02:07:29 UTC
mapreduce with non-text data
Hi,
Are there any use cases, examples of use of Hadoop MapReduce for non-text
data? Only examples that I see on the web are for text data. Any pointers in
that direction is greatly appreciated. Thanks.
Regards,
Upendra
Pipes with the latest version of mapReduce
Posted by Upendra Dadi <ud...@gmu.edu>.
Hi,
I am trying to use MapReduce Pipes with version 0.20.1. of hadoop. If I
used org.apache.hadoop.mapreduce.lib.input.TextInputFormat as the input
format with the -InputFormat option, I am getting the following
error:
Exception in thread "main" java.lang.ClassCastException: class
org.apache.hadoop.mapreduce.lib.input.TextInputFormat
at java.lang.Class.asSubclass(Class.java:3018)
at
org.apache.hadoop.mapred.pipes.Submitter.getClass(Submitter.java:372)
at org.apache.hadoop.mapred.pipes.Submitter.run(Submitter.java:421)
at org.apache.hadoop.mapred.pipes.Submitter.main(Submitter.java:494)
I was able to run Pipes without the -InputFormat option, but my requirement
is to extend TextInputFormat. I guess Pipes is assuming the inputFormat to
be of type org.apache.hadoop.mapred.InputFormat, which is deprecated. So I
guess 0.20.1 is not fully ported to work with Pipes. Am I right here? Which
version should I use? Thanks.
Upendra
----- Original Message -----
From: "Erez Katz" <er...@yahoo.com>
To: <co...@hadoop.apache.org>
Sent: Friday, November 27, 2009 6:59 PM
Subject: Re: mapreduce with non-text data
> you could always base64 encode your binary data...
>
>
>
> --- On Thu, 11/26/09, Upendra Dadi <ud...@gmu.edu> wrote:
>
>> From: Upendra Dadi <ud...@gmu.edu>
>> Subject: mapreduce with non-text data
>> To: common-dev@hadoop.apache.org
>> Date: Thursday, November 26, 2009, 5:07 PM
>> Hi,
>> Are there any use cases, examples of use of Hadoop
>> MapReduce for non-text data? Only examples that I see on the
>> web are for text data. Any pointers in that direction is
>> greatly appreciated. Thanks.
>>
>> Regards,
>> Upendra
>>
>
>
>
Re: mapreduce with non-text data
Posted by Erez Katz <er...@yahoo.com>.
you could always base64 encode your binary data...
--- On Thu, 11/26/09, Upendra Dadi <ud...@gmu.edu> wrote:
> From: Upendra Dadi <ud...@gmu.edu>
> Subject: mapreduce with non-text data
> To: common-dev@hadoop.apache.org
> Date: Thursday, November 26, 2009, 5:07 PM
> Hi,
> Are there any use cases, examples of use of Hadoop
> MapReduce for non-text data? Only examples that I see on the
> web are for text data. Any pointers in that direction is
> greatly appreciated. Thanks.
>
> Regards,
> Upendra
>