Original Parallel Transfer

• client makes a request
• server redirects client to destination
• destination server opens up high ports
• client connects to destination
• data is moved in parallel

• requires many open ports everywhere
• lacks durability
• lacks control from client side
• lacks ability to provide a DMZ server outside of a firewall

New Parallel Transfer

• requires one default port
• clients may retry given any failures
• clients are in control of data movement
• data may be forwarded by a DMZ server

...

destination

request

destination

response

N direct

connections

for

data movement

Client

Connected

Server

Destination Server

...

potential

redirection

of data