CFIO: i/o forwarding with pnetcdf

[Rob Latham]

A group in China has developed a climate-oriented I/O library called
CFIO.  It has the two interesting design properties that it sits on
top of pnetcdf and it forwards I/O to "server" processes. 

https://github.com/CFIO/CFIO/wiki/CFIO-Design

all processes start out in MPI_COMM_WORLD, but some user-specified
ratio determines which clients end up in a server group and which ones
end up in a client group.   

Clients send to servers with simple point to point operations. 

Pthreads are used to get the clients sending data to servers in the
background.

==rob

-- 
Rob Latham
Mathematics and Computer Science Division
Argonne National Lab, IL USA