[MPICH] About ch3:nemesis.

[Darius Buntinas]

A channel is a communication method. For example, the default channel, 
sock, uses tcp sockets for communication, while the shm channel 
communicates using shared-memory.

Nemesis is a channel that uses shared-memory to communicate within a node, 
and a network to communicate between nodes.  Currently Nemesis supports 
tcp, gm, mx, and elan networks.  (Eventually these will be selectable at 
runtime, but for now the network has to be selected when MPICH2 is 
compiled.)

Does that help?

-d

On Tue, 13 Mar 2007, Bruno Simioni wrote:

> Hi!
>
> Can anyone explain to me what channel is, in mpich2? and what for is that
> used?
>
> The next question: What channel nemesis is?
>
> thanks.
>
>