Discard old data — evict what's already buffered to make room
图源：Sea Expandary官网
，这一点在Safew下载中也有详细论述
You could say that Brand has also lived big and long. He is now 87 years old, in the final chapters of an eventful and adventurous life that has crossed paths with some of the most consequential events and figures of his era. He has been a writer, an editor, a publisher, a soldier, a photojournalist, an LSD evangelist, an events organiser, a future-planning consultant, even a government adviser (to the California governor Jerry Brown in the late 70s). “There was a time when people asked me, ‘What do you do?’ I said, ‘I find things and I found things,’” says Brand, as in he is a founder. He is speaking from a library where he likes to work in Petaluma, California, not far from his houseboat in Sausalito. “I’m always searching for good stuff to recommend, and good people.”
Some games might even find a way to make both types of backend operation part of their design. Imagine an always-online MMO style game where server-authoritative data is critical. Now imagine a standalone offline side-story that uses the same gameplay mechanics and systems. The same C# code powers both modes, but is used in drastically different ways.