(The following example is a simplified and modified version of anonline discussion I had recently. All errors are my fault.)

Here's an example large database problem; it's simplest to cast thisas a customer support system that you sell to big companies.

In your first version, the customer support application databasesystem includes a table of companies that are being supported.

Multiple groups write various programs against this database, and inpart against this table and other tables hooked to it (such as peoplewho

It's nice when everything works like it's supposed to; the mostexcitement we had today was swapping in a replacement drive in thisserver. (I like Mondays for this sort of thing, since I'll be in theoffice for the next four days in case problems come up.)

The old IDE disk needed replacement because it was starting to remindus that it was consumer electronics by flaking out on seeks underheavy IO load every so often (hopefully it was the drive and not thecabling

There are only a few popular search engines at anytime. They are doing you a favour by indexing you, because you needtheir users far more than they need your content. You are are doingeveryone else a favour by letting them index you , since they needcontent (yours included) to attract users.

When people are doing you a favour, it's worthwhile to go out of yourway to help them out.

When you are doing search engines the favour, it's their job to go