Technical information

LinkFreeze consist of two components – ISAPI filter and MMC snap-in extension. ISAPI filter is a fast DLL module written in pure C++. While installing LinkFreeze MMC snap-in will be registered automatically. ISAPI filter will be installed later for each site separately when you enable LinkFreeze for a site. A copy of ISAPI filter DLL file will be created for each site where LinkFreeze is enabled. This is done to solve problem with multiple DLL loads in Windows 2000 or earlier versions of Windows.

LinkFreeze filter is fast enough to not to consider about performance, unless your server is running under maximum load. Users will not find any difference in response time or CPU load, but the maximum server bandwidth may fall down a bit. We where able to register up to 10% fall of maximum server bandwidth in synthetic tests (very large number of very small static files). In the real life with database-driven application maximum bandwidth should not fall more than 1%.