Re: Could not get block locations. Aborting... exception

https://issues.apache.org/jira/browse/HADOOP-4346 might explain this. Raghu. Bryan Duxbury wrote: Ok, so, what might I do next to try and diagnose this? Does it sound like it might be an HDFS/mapreduce bug, or should I pore over my own code first? Also, did any of the other exceptions look

Hadoop and security.

Dear hadoop users, I'm lucky to work in academic environment where information security is not the question. However, I'm sure that most of the hadoop users aren't. Here is the question: how secure hadoop is? (or let's say foolproof) Here is the answer:

ERROR dfs.NameNode:

I have setup a multi node cluster as one machine(master in this case) which acts as master as well as slave and other machine(slave) as slave I'm getting following error while executing the command: [EMAIL PROTECTED] bin/hadoop namenode [EMAIL PROTECTED] hadoop-0.18.0]$ bin/hadoop namenode

How to modify hadoop-wordcount example to display File-wise results.

Greetings! Hi, Am trying to modify the WordCount.java mentioned at Example: WordCount v1.0http://hadoop.apache.org/core/docs/current/mapred_tutorial.html#Example%3A+WordCount+v1.0at http://hadoop.apache.org/core/docs/current/mapred_tutorial.html Would like to have output the following way,

Re: How to modify hadoop-wordcount example to display File-wise results.

Hi Srilatha, You could do the following: Map steps can only collect key, value pairs; they can't collect three things. Instead of collecting (word, 1) in the mapper, you could collect (word, filename). Then, in the reduce step, you could output (filename, word|count), where word|count is Text,

Re: Hadoop and security.

Hadoopy is secure enough to be used on a cluster that has access control in a friendly environment. That is to say, not very. These issues are well known. User identities were added recently, but, as you note, they are dependent on trusting unix logins and can easily be spoofed. More secure

Re: How to modify hadoop-wordcount example to display File-wise results.

What you need to do is snag access to the filename in the configure method of the mapper. Then instead of outputting just the word as the key, output a pair containing the word and the file name as the key. Everything downstream should remain the same. On Sun, Oct 5, 2008 at 11:26 AM, Alex

Data types in Ganglia metrics

Hey all, I recently wrote/applied a few of the patches lingering in JIRA in order to get working Ganglia metrics reporting. I'd like to share a few notes, and want to know if anyone else has experience running these: 0) A few patches have to be applied to get Ganglia reporting working

Looking for Hadoop HBase experts!

Hi folks,We here at VideoSurf are doing some exciting things with Hadoop and HBase. We're hiring people with Hadoop experience right now into the position Sr. Advertising Systems, Engineer. Extra helpful if you have experience with HBase. Contact me if you're interested! Daniel Leffel VP,

Re: Looking for Hadoop HBase experts!

Hi Daniel I am interested in this job since I have experience working in HADOOP. Can you give me your e-mail ID where I can mail my Resume. Thank You Very Much Prerna On Sun, Oct 5, 2008 at 7:45 PM, Daniel Leffel [EMAIL PROTECTED] wrote: Hi folks,We here at VideoSurf are doing some exciting

Re: Looking for Hadoop HBase experts!

Please send your resume to [EMAIL PROTECTED] and cc: [EMAIL PROTECTED] Thanks! Daniel Leffel On Sun, Oct 5, 2008 at 5:43 PM, Prerna Manaktala [EMAIL PROTECTED] wrote: Hi Daniel I am interested in this job since I have experience working in HADOOP. Can you give me your e-mail ID where I can

Re: architecture diagram

Let's say you have one very large input file of the form: A|B|C|D E|F|G|H ... |1|2|3|4 This input file will be broken up into N pieces, where N is the number of mappers that run. The location of these splits is semi-arbitrary. This means that unless you have one mapper, you won't be able to

Where could I get the read and write throughput data of HDFS?

Hi. I want to know read and write throughput data of HDFS Where could I get that data? I can't find it.T.T Did you see that data? Thanks,

Re: Where could I get the read and write throughput data of HDFS?

I think you can find that data at this page -- http://developer.yahoo.com/blogs/hadoop/2008/09/scaling_hadoop_to_4000_nodes_a.html /Edward J. Yoon On Mon, Oct 6, 2008 at 11:30 AM, 황인환 [EMAIL PROTECTED] wrote: Hi. I want to know read and write throughput data of HDFS Where could I get that

How to GET row name/column name in HBase using JAVA API

Hello guys, I m trying to use Java to manipluate HBase using its API. Atm, I m trying to do some simple CRUDs activities with it and from here a little problem arise. What I was trying to make is : Given an existing table, display/get existed row name ( in order to update, manipulate