transparent cache

transparent cache

A computer system or software within a computer system that determines if a requested page or file has already been stored in memory or on its hard disk. If it has not, the request is sent upstream to its normal destination. The transparent cache sits between the client and server and is invisible to either side. There are also no configuration adjustments required in the browser to use a transparent cache. See Web cache.
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PeerApp's UltraBand is the world's only transparent cache and content delivery solution that supports video, HTTP file downloads, software updates and peer-to-peer in a single, modular and scalable architecture.
Foundry's ServerIron family of Layer 4 - 7 switches provide sophisticated Internet traffic and content switching features including server load balancing, URL and cookie based switching, global server load balancing, firewall load balancing and transparent cache switching.
In addition, Dacom has deployed Foundry's ServerIron Layer 4-7 Web switches providing transparent cache switching functionality.
The ServerIron XL/TCS switch has been exclusively optimised for content aware transparent cache switching.
Tullett & Tokyo also utilizes the ServerIron's transparent cache switching capability to provide faster web access for customers who check their stocks online.
In an SCN, one-timer objects can take an even higher percentage, due to the sparse number of users; therefore, using transparent caches is not suitable for SCNs.
In contrast, enhanced Layer 4 Ethernet switches route all HTTP requests, including those for dynamic content, to the transparent caches. With this approach, caches incur additional processing overhead when they must forward requests for dynamic content to origin servers, resulting in slower response times for Web users.

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