Riverbed Caching

Caching

Application Independence

Riverbed Steelhead appliances are application independent, unlike a cache. Caches keep copies of objects that may be required by clients in the future so that the same data does not have to be resent. The disadvantage of this is that a cache only works within a specific application. So a file cache will only help with requests for the same file, but will not assist in web traffic, email, backup, ERP applications, or any other type of traffic.

Safety Versus High Performance

A cache stores copies of origin-server data, which by definition are not original copies. This means there is a fundamental query with any cached data about safety versus performance. An operation is safe when the client is certain that the data being requested is the actual data, not an out-of-date copy. With Riverbed Steelhead appliances, there is no chance of data ever being out of date, because all client requests are processed through to the server, and the data received by the client is always fresh.

Ease of Deployment

Caches are proxies for origin servers, and therefore clients have to be configured to know about the proxy server. Unlike a cache, a Steelhead appliance is not a proxy server so clients need absolutely no configuration - they just access servers as always. The Steelhead appliances perform all optimizations completely transparently.

Datasheets:

• Steelhead Family of Products

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