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"serverless" hosting
Servers are often grouped into server clusters. These clusters usually consist of at least two server computers which could operate independently. They are generally made to improve performance of a website or other virtual server—this is especially important for popular websites.<ref>http://compnetworking.about.com/od/basicnetworkingconcepts/g/network_servers.htm</ref> For example, each server computer may support up to 1,000 clients, but if a website receives more than this at a time, it will be overloaded. With a cluster, however, clients will be distributed throughout the available servers to avoid overload.<ref>https://technet.microsoft.com/en-us/library/cc785197%28v=ws.10%29.aspx</ref>
Servers are often grouped into server clusters. These clusters usually consist of at least two server computers which could operate independently. They are generally made to improve performance of a website or other virtual server—this is especially important for popular websites.<ref>http://compnetworking.about.com/od/basicnetworkingconcepts/g/network_servers.htm</ref> For example, each server computer may support up to 1,000 clients, but if a website receives more than this at a time, it will be overloaded. With a cluster, however, clients will be distributed throughout the available servers to avoid overload.<ref>https://technet.microsoft.com/en-us/library/cc785197%28v=ws.10%29.aspx</ref>
Many large websites and services use clusters, including Amazon.{{citation needed}}
Many large websites and services use clusters, including Amazon.{{citation needed}}
==Serverless computing==
A newer method of running certain backend services on the cloud is called "serverless computing," sometimes known as "Backend-as-a-Service" While it is still technically being run on someone's server somewhere, the serverless hosting customer never sees or maintenance the server itself. Rather, they provide code or a scrip which is executed by the hosting provider, and the provider worries about the rest. Although this sound simple (and often is), it also tends to be inexpensive. Most providers only charge for the amount of time certain resources are used by the client's script, making this a very economical option for some.<ref>https://www.martinfowler.com/articles/serverless.html</ref>
==References==
==References==
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