McAfee AVDCDE-AA-AA User Guide - Page 319
D Understanding iDAT Technology, Understanding incremental .DAT files, Product requirements
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Understanding iDAT D Technology D Understanding incremental .DAT files To function at peak efficiency, VirusScan software needs regular infusions of new virus definition data files (.DAT files). Without them, the software might not detect new virus strains or respond effectively to remove the threat from your system. Prior versions of the AutoUpdate utility required you to download and install the entire virus definition package each week. That package has grown steadily in size with each new virus definition addition and now includes more than 50,000 virus definitions. With this VirusScan release, McAfee introduced a new incremental virus definition (.DAT or iDAT) technology that consists of small parcels that contain only the virus definitions that have changed between weekly .DAT file releases-not the entire .DAT file set. Instead of a weekly 3MB or larger .DAT file update, you can now download iDAT parcels that range in size from 100KB to 110KB, depending on how many virus definitions come included. This development means that you can download .DAT file updates much faster, and at a far lower cost in bandwidth, than ever before. Better still, the AutoUpdate utility makes this process completely transparent -it will download as many incremental .DAT files as it needs to bring your software up to date. If your .DAT files are older than the backward range of iDAT packages available, or if an iDAT download fails for any reason, the utility will download the entire current .DAT file package. In either case, the AutoUpdate utility ensures that you have absolutely current .DAT files to protect your system, without the need to worry about which files to download. Simply point the utility to an update source, schedule a time for the AutoUpdate task to run, and let the utility do its work. Ë IMPORTANT: Incremental updates apply only to .DAT files. McAfee does not provide incremental updates for scan engine files. To update your engine files, use the SuperDAT utility. The SuperDAT utility will download and install only full .DAT file updates. Product requirements To download and install iDAT parcels, you must have VirusScan v4.5 or later anti-virus software along with the corresponding AutoUpdate utility, and you must have already upgraded your Olympus scan engine to v4.0.50 or later. Incremental .DAT files do not work with earlier product or engine versions. User's Guide 319