Re: When use hadoop mapreduce?

Hi, 2011/2/17 Pedro Costa : > I like to know, depending on my problem, when should I use or not use > Hadoop MapReduce? Does exist any list that advices me to use or not to > use MapReduce? The summary I usually give goes something like this: IF your computation takes too long on a single system

Re: mapreduce streaming with hbase as a source

You have a typo, it's hbase.mapred.tablecolumns not hbase.mapred.tablecolumn J-D On Fri, Feb 18, 2011 at 6:05 AM, Ondrej Holecek wrote: > Hello, > > I'm testing hadoop and hbase, I can run mapreduce streaming or pipes jobs > agains text files on > hadoop, but I have a problem when I try to run

Re: simple map reduce

Please keep user questions on mapreduce-user as per http://hadoop.apache.org/mailing_lists.html . On Feb 18, 2011, at 2:42 AM, Alessandro Binhara wrote: I need extend ArrayWritable ??? like this : public class IntArrayWritable extends ArrayWritable { public IntArrayWritable() { super(IntWrit

mapreduce streaming with hbase as a source

Hello, I'm testing hadoop and hbase, I can run mapreduce streaming or pipes jobs agains text files on hadoop, but I have a problem when I try to run the same job against hbase table. The table looks like this: hbase(main):015:0> scan 'table1' ROWCO

Hadoop on Planet Lab Nodes

Hi all, Did somebody has experience in running Hadoop on PlanetLab nodes ? I will be grateful for any suggestions on how to do it. Thanks, Robert