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Hadoop >> mail # dev >> multiple datanodes on single node cluster

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Re: multiple datanodes on single node cluster

On Feb 25, 2009, at 11:55 PM, lohit wrote:

> It is possible to run multiple datanodes.
> You would have to have separate conf file for each datanode,  
> basically you need to have different datanode address  
> (dfs.datanode.address and related)
> and different storage directories dfs.data.dir. Have different  
> configs and start each datanode instance with different conf  
> directory containing different conf file
> Lohit
> ----- Original Message ----
> From: Ajit Ratnaparkhi <[EMAIL PROTECTED]>
> Sent: Wednesday, February 25, 2009 11:04:15 PM
> Subject: multiple datanodes on single node cluster
> Hi all,
> Is it possible to run multiple datanode instances on single node  
> hadoop
> cluster?
> How to do that?
> thanks,
> -Ajit
The minicluster also allows multiple data nodes in the same JVM.
This normally used only for testing. See DataNodeCluster under src/test.
This is probably not what you are looking for but I thought I would  
mention it.