Hadoop does not need ssh in MR.
hadoop start up script needs ssh setup so that you can start all your
services from a single node. And that is not mandatory. You can login to
all nodes and start individual services on the nodes as needed by the node
with the correct configuration for hadoop
On Wed, Feb 13, 2013 at 7:15 PM, Pedro Sá da Costa <[EMAIL PROTECTED]>wrote:
> So, why it is necessary to configure ssh in Hadoop MR?
> On 13 February 2013 12:58, Harsh J <[EMAIL PROTECTED]> wrote:
>> Nodes in Hadoop do not communicate using SSH. See
>> On Wed, Feb 13, 2013 at 5:16 PM, Pedro Sá da Costa <[EMAIL PROTECTED]>
>> > I'm trying to configure ssh for the Hadoop mapreduce, but my nodes only
>> > communicate with each others using RSA keys in pem format.
>> > (It doesn't work)
>> > ssh user@host
>> > Permission denied (publickey).
>> > (It works)
>> > ssh -i ~/key.pem user@host
>> > The nodes in mapreduce communicate using ssh. How I configure the ssh,
>> > the mapreduce to work with the pem file.
>> > --
>> > Best regards,
>> > P
>> Harsh J
> Best regards,