More Issues

U

Costly Communication

• Network latency ... orders of magnitudes of speeds

Maintaining a global state of the software

• State may be shared
• Partial failures may cause shared state to be inconsistent

Secure Communication

• What and who is to be trusted?

What is to be distributed?

• Fast (and expensive) servers with slow clients
• Client and servers can only be identified relative to any given problem ... peer-to-peer computing
• Information as the scarce or expensive resource