...processes

Examples are: page tables, file access tables, priorities, privileges, CPU and I/O status

...machine

For example, memory allocation, priorities and privileges, buffers etc.

...reliability

For example, malfunction of a node blocks services to all processes depending on that particular node.

...performance

Higher network traffic and process waiting time due to communication between hosts results in less computation time for user tasks.

...complexity

A communications infrastructure to handle residual dependencies must be established.

fritsch@fsinfo.cs.uni-sb.de