From owner-freebsd-isp Thu Aug 22 21:22:50 1996 Return-Path: owner-isp Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id VAA26547 for isp-outgoing; Thu, 22 Aug 1996 21:22:50 -0700 (PDT) Received: from mail.crl.com (mail.crl.com [165.113.1.22]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id VAA26541 for ; Thu, 22 Aug 1996 21:22:45 -0700 (PDT) Received: from root.com (implode.root.com) by mail.crl.com with SMTP id AA29783 (5.65c/IDA-1.5 for ); Thu, 22 Aug 1996 21:21:29 -0700 Received: from localhost (localhost [127.0.0.1]) by root.com (8.7.5/8.6.5) with SMTP id VAA09955; Thu, 22 Aug 1996 21:18:36 -0700 (PDT) Message-Id: <199608230418.VAA09955@root.com> X-Authentication-Warning: implode.root.com: Host localhost [127.0.0.1] didn't use HELO protocol To: Michael Dillon Cc: freebsd-isp@freebsd.org Subject: Re: Does FreeBSD hash PCB's like BSDI ??? In-Reply-To: Your message of "Thu, 22 Aug 1996 20:15:54 PDT." From: David Greenman Reply-To: dg@root.com Date: Thu, 22 Aug 1996 21:18:36 -0700 Sender: owner-isp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk >In the context of running a heavily loaded mail server Paul Vixie mentions >below that BSDI can handle this better than older UNIXes due to hashed >PCB's. Note that this is very applicable to sites that want to run lots of >large mailing lists which is something I am working on setting up. FreeBSD is was the first "BSD" to have PCB hashing. I implemented it nearly a year and a half ago: revision 1.9 date: 1995/04/09 01:29:18; author: davidg; state: Exp; lines: +105 -32 Implemented PCB hashing. Includes new functions in_pcbinshash, in_pcbrehash, and in_pcblookuphash. There is a very good chance that BSDI's implementation is based on my work, but I haven't seen the code so this is just a guess. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project