Three layers in the distributed name space and how their availability and performance requirements can be met.
Global Layer:
– Very stable, Results of lookups can be effectively cached by clients
– Throughput is important to millions of users
– Availability and performance requirements are met with replicating servers
combined with client-side caching
Administrational Layer:
– Very stable, Results of lookups can be effectively cached by clients
– Will have greater number of addresses to look up, quick response is important
– Availability and performance requirements are met with replicating servers
combined with client-side caching, and high-performance machines
Managerial Layer:
– Not stable, caching not effective
– Availability not as crucial, replication not required
– Availability and performance requirements are met with high-performance machines