Chapter 10. Parenting
Once your domain
Good parenting starts with carving up your domain sensibly, choosing appropriate
Good parenting is
In this chapter we present our views on when to create subdomains, and we go over how to create and delegate them in some detail. We also discuss management of the parent-child relationship and, finally, how to manage the process of carving up a large domain into smaller subdomains with minimal disruption and inconvenience.
10.1 When to Become a Parent
Far be it from us to tell you when you should become a parent, but we will be so bold as to offer you some guidelines. You may find some compelling reason to implement subdomains that isn't on our list, but here are some of the most common reasons:
Once you've decided to have children, the
10.2 How Many Children?
Of course, you won't simply say, "I want to create four subdomains." Deciding how many subdomains to implement is really choosing the organizational affiliations of those subdomains. For example, if your company has four branch offices, you might decide to create four subdomains, each of which corresponds to a branch office.
Should you create subdomains for each site, for each division, or even for each department? You have a lot of latitude in your choice because of DNS's scalability. You can create a few large subdomains or many small subdomains. You face trade-offs whichever you choose, though.
Delegating to a few large subdomains isn't much work for the parent because there's not much delegation to keep track of. However, you wind up with larger subdomains, which require more memory to load and faster
Delegating to many smaller subdomains can be a
Given the advantages and disadvantages of either alternative, it may seem difficult to make a choice. Actually, there's probably a natural division in your organization. Some companies manage computers and networks at the site level; others have decentralized, relatively autonomous workgroups that manage everything