Segment-based proxy caching of multimedia streams
Proceedings of the 10th international conference on World Wide Web
Advanced Programming in the UNIX(R) Environment (2nd Edition)
Advanced Programming in the UNIX(R) Environment (2nd Edition)
Avfs: an on-access anti-virus file system
SSYM'04 Proceedings of the 13th conference on USENIX Security Symposium - Volume 13
A universal algorithm for sequential data compression
IEEE Transactions on Information Theory
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A storage-based anti-virus access gateway is not scalable because it stores the entire mail under processing. This work designs and evaluates a stream-based mail proxy constructed from several open-source packages. This proxy processes mail in segments, and interleaves MIME parsing, decoding, decompressing and virus scanning. It is seven times faster than the storage-based one on forwarding, three times faster on virus scanning, and twice as faster on decompressing plus virus scanning. This proxy can keep nearly constant memory usage and work without disks, while the storage-based one requires memory and disk space proportional to the number of clients and the mail size.