Peter Beckman
beckman@purplecow.com
Mon Dec 2 16:35:53 UTC 2002
So approximately 700MB of data per day, based on a 7K per message including headers. That comes out to approximately 8.10KBps or 64.8Kbps in bandwidth, or about a modem's worth of bandwidth per day on average. I'd say that given the ebb and flow of data, expect 4 times that average at peak, or topping out at ~259Kbps during peak times, much less on other days. That's about 17% of a T1 being used a peak times. I'm basing the 7K per message on the size of my spam mailbox of 10,051 messages divided by the ~68MB in size of that mailbox. Peter On Mon, 2 Dec 2002, Vernon Schryver wrote: > > From: "John R Levine" <johnl@iecc.com> > > > ... > > I'm considering building a lowish end mail appliance using DCC, but if I > > do, it'll be running something unixish so it can run its own server, and > > I'd charge a monthly maintenance fee which would include access to other > > servers. > > ... > > The 15-bit DCC server-ID makes having a zillion small servers impossible > without using uglinesses such as the server-ID translation kludge. > However, a low-end appliance could pay for the use of external servers. > I think there's enough de facto load balancing in the protocol and > the client code to make this work fine. Each DCC client tracks up to > 8 server names and the current DCC RTTs for as many as 16 IP addresses > among those names. If you spread the servers around, the appliance > would either be able to see servers on the Internet or would not see > much mail to filter. > > The current daily bandwidth required for DCC flooding is similar > to the bandwidth needed to check about 100,000 mail messages/day. > A DCC server wants about 128 MByte of RAM to start and perhaps > another 50 MByte per 100K mail messages/day. See > http://www.rhyolite.com/anti-spam/dcc/FAQ.html#system-load > > > Vernon Schryver vjs@rhyolite.com > _______________________________________________ > DCC mailing list DCC@rhyolite.com > http://www.rhyolite.com/mailman/listinfo/dcc > --------------------------------------------------------------------------- Peter Beckman Internet Guy beckman@purplecow.com http://www.purplecow.com/ ---------------------------------------------------------------------------
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