``Mayday: Distributed Filtering for Internet Services'' by David G. Andersen. In Proc. 4th USENIX Symposium on Internet Technologies and Systems (USITS), (Seattle, Washington), Mar. 2003. PDF/ps updated 2008 to correct an unclear explanation.

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BibTeX entry:

@inproceedings{Andersen-mayday2003,
   author = {David G. Andersen},
   title = {{Mayday: Distributed Filtering for Internet Services}},
   booktitle = {{Proc. 4th USENIX Symposium on Internet Technologies and
	Systems (USITS)}},
   address = {Seattle, Washington},
   month = mar,
   year = {2003},
   note = {PDF/ps updated 2008 to correct an unclear explanation.}
}