How to Compress output of mapper

Hi all, I am using Hadoop 0.20.2.I tried to compress the output of the mapper using setMapOutputCompressorClass(DefaultCodec.class) on the Job object,but it throws an error stating setMapOutputCompressorClass is not available for Job class. Please tell me how to use compression on mapper output fo

Terminal Level Authentication

. Sujitha - This email was sent using TCEMail Service. Thiagarajar College of Engineering Madurai-625 015, India

User Authentication Using Kerberos

Hi All, i am working on hadoop security wherein in the first step to authenticate users,Kerberos authentication protocol was used. Is it wise using Kerberos (version in C) or otherwise have to look for Java Kerberos version 1.1 for hadoop security framework?? Thanks Regards Suji

Re: Map Reduce in heterogeneous environ..

> What do you mean by heterogeneous environment? Do you mean servers > with different number of cores? > no..hetero environ mean a 32 node(quad core) cluster running on debain and another 4 node(dual core) cluster running on windows.can i consider these as rack1 and rack2 and run mapred jobs using

Map Reduce in heterogeneous environ..

hi all map reduce is running on hadoop clusters(homogeneous).is it possible to use it in a heterogeneous environment..is that we need any interface to support this?? suggestion please. Regards Suji - This email was sent using TCEMail Service. Thiagarajar

Map-Reduce for Security

Hi all, In order to secure the content of HDFS is it right encrypting and compressing data before storing it. Is there any way to use map reduce for securing data in hadoop? thanks Regards Suji - This email was sent using TCEMail Service. Thiagarajar

Re: How Hadoop Works??

reating instances. Is that right??? >> thanks >> sujitha >> >> >> >> >> - >> This email was sent using TCEMail Service. >> Thiagarajar College of Engineering >> Madurai-625 015, India >> >> >