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Surf's Up

Smart Caching

OptiView's caching algorithms evaluate content against LMT (last modified time) to ensure that content is expired only when necessary. If no cache-control headers are present or the LMT is always "now" (content that rarely changes is set to expire immediately), the device will ignore the directives and direct the client to use objects in the browser cache, if they exist, or will serve the object from its own cache if the client has not accessed the object already. If the server sets an expiration via a cache-control header, however, that expiration is always respected by the device.

• Supports both reverse and transparent proxy modes (WCCP)

• Offers compression features in addition to caching
• Can dynamically modify images, adding flexibility to serve customers without requiring multiple copies of the same image in different formats, sizes and colors

• Limited statistics and monitoring
• Lacks integration with authentication mechanisms
• Requires purchase of add-on to turn device into a wire relay in the event of device failure

SiteCelerate can be set up to update its software automatically. The default is set to check for updates every hour or an administrator can initiate updates. Objects are cached in a compressed state, making the most of SiteCelerate's internal storage, and will be decompressed for clients that cannot receive compressed data.

SiteCelerate uses SNMP for monitoring and statistics gathering. And its customized Linux OS uses MRTG (Multi Router Traffic Grapher), which is a GPL (GNU Public License) solution for monitoring and graphing network traffic via SNMP. Access logs also are available in raw-text format.

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