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From "Jaeyun Noh" <metal...@gmail.com>
Subject Re: map reduce range of records from hbase table
Date Thu, 09 Oct 2008 04:01:23 GMT

BTW, it seems that the output format (subclass of
org.apache.hadoop.mapred.OutputFormat) of MR job can only be a file. Can we
define our own file format which hbase clients can access?

My goal is to implement filter-enabled table scanner which runs by
multi-process clients using MR. I'm trying to leverage MR since the
ClientScanner class of HTable sequencially access Hregion and thus involves
multiple round trips btw servers and clients.

On Wed, Oct 8, 2008 at 4:30 PM, stack <stack@duboce.net> wrote:

> Jaeyun Noh wrote:
>> Hi,
>> May I ask another question?
>> I'm running HBase/Hadoop on linux server, and implementing business
>> application with java, which runs on a different windows machine.
>>  It looks like MapReduce job runs on a server node. Can I run the
>> MapReduce
>> job built on windows client with an existing linux server? How can we get
>> result done by MapReduce job at the server?
> You should be able to, yes.  Make sure you use same java on both machines.
>  This page might help some: http://wiki.apache.org/hadoop/Hbase/MapReduce.
> St.Ack

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