Curtis, > A quick question. I've been running amavisd-new and postfix for a few > years and it works well. amavisd is a bit of a resource hog, but I've > managed to trim down what gets fed to it and that has helped a great deal. > However, lately I've been reading about the newer amavisd-milter > interface. Which is more efficient for handing mail to amavis, the milter > interface or the smtp handoff? amavis is running on the same machine as > the smtp server. I was thinking of splitting it off onto a separate > machine, but finally getting postfix to reject unknown virtual recipients > has reduced the load dramatically.
Well, the milter interface is a little bit faster, as it avoids having amavisd do the reading line by line (because of the dot stuffing) and can read by chunks. But the difference is really negligible - on our server the SMTP receiving by amavisd takes 60 ms on the average. Even if you'd reduce that reading time to zero, it would still make no difference to the total time spent, mostly in SpamAssassin. The SMTP sending time is even shorter, as in this case I/O can go by chunks and is cheap. So I don't think it is worth loosing some of the capabilities (like per-recipient mail header rewrites) for the sole purpose of saving 60 milliseconds per message, especially when also doing spam checks. You may move amavisd to a separate machine to split the load if CPU resources are better there. This applies either to the SMTP interface, or to the milter interface (milter must run on the same host as amavisd, both of which may be moved away from the MTA host). With SMTP interface one can even have multiple amavisd backends and let MTA use its MX load sharing functionality. Mark ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ AMaViS-user mailing list AMaViS-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amavis-user Please visit http://www.ijs.si/software/amavisd/ regularly For administrativa requests please send email to rainer at openantivirus dot org
