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Re: Multidata center support
Although you can set datacenter layer on your network topology, it is never enabled in hadoop as lacking of replica placement and task scheduling support. There are some work to add layers other than rack and node under HADOOP-8848 but may not suit for your case. Agree with Adam that a cluster spanning multiple data centers seems not make sense even for DR case. Do you have other cases to do such a deployment?



----- Original Message -----

From: "Adam Muise" <[EMAIL PROTECTED]>
Sent: Friday, August 30, 2013 6:26:54 PM
Subject: Re: Multidata center support

Nothing has changed. DR best practice is still one (or more) clusters per site and replication is handled via distributed copy or some variation of it. A cluster spanning multiple data centers is a poor idea right now.
On Fri, Aug 30, 2013 at 12:35 AM, Rahul Bhattacharjee < [EMAIL PROTECTED] > wrote:

My take on this.

Why hadoop has to know about data center thing. I think it can be installed across multiple data centers , however topology configuration would be required to tell which node belongs to which data center and switch for block placement.

On Fri, Aug 30, 2013 at 12:42 AM, Baskar Duraikannu < [EMAIL PROTECTED] > wrote:


We have a need to setup hadoop across data centers. Does hadoop support multi data center configuration? I searched through archives and have found that hadoop did not support multi data center configuration some time back. Just wanted to see whether situation has changed.

Please help.

Adam Muise
Solution Engineer

Hortonworks - Develops, Distributes and Supports Enterprise Apache Hadoop.

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