1.4.8 Scalability
Scalability defines how a site can be expanded to accommodate increasing levels of service requirements. You should consider the following points:
| Sites must often expand, sometimes with little prior warning. |
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| Sites must be able to grow to support increased load. |
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| Increased loads can come from many sources, such as new markets, normal growth, and extreme peaks such as Christmas, Easter, Thanksgiving, and so forth. |
Good scalability makes site growth possible and easy.
How can you grow a Web site to handle more load? You have a couple of solutions based on either vertical or horizontal scaling.