hi,

   If I push a file into HDFS that runs on a 4 node cluster with 1 namenode
and 3 datanodes, how can I view where on the datanodes are the blocks of
this file?
I would like to view the blocks and their replicas individually. How can I
do this?

The answer is very critical for my current task which is halted :) A
detailed answer will be highly appreciated.

Thank you!

With Regards,
Abhishek S

Hi Abhishek,

You can use fsck for this purpose

hadoop fsck <HDFS directory> -files -blocks -locations  --- Displays what you want

*------------------------*

Cheers !!!

Siddharth Tiwari

Have a refreshing day !!!
"Every duty is holy, and devotion to duty is the highest form of worship of God.”

"Maybe other people will try to limit me but I don't limit myself"
From: [EMAIL PROTECTED]
Date: Fri, 24 Aug 2012 22:10:37 +0530
Subject: How do we view the blocks of a file in HDFS
To: [EMAIL PROTECTED]

hi,
   If I push a file into HDFS that runs on a 4 node cluster with 1 namenode and 3 datanodes, how can I view where on the datanodes are the blocks of this file?I would like to view the blocks and their replicas individually. How can I do this?
The answer is very critical for my current task which is halted :) A detailed answer will be highly appreciated.Thank you!

With Regards,
Abhishek S

     

Abhishek,

Some searching should've revealed this as it has been asked before.
For example, see http://search-hadoop.com/m/W1RAklVhe7

On Fri, Aug 24, 2012 at 10:10 PM, Abhishek Shivkumar
<[EMAIL PROTECTED]> wrote:
> hi,
>
>    If I push a file into HDFS that runs on a 4 node cluster with 1 namenode
> and 3 datanodes, how can I view where on the datanodes are the blocks of
> this file?
> I would like to view the blocks and their replicas individually. How can I
> do this?
>
> The answer is very critical for my current task which is halted :) A
> detailed answer will be highly appreciated.
>
> Thank you!
>
> With Regards,
> Abhishek S

--
Harsh J