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Date:      Thu, 22 Aug 1996 21:18:36 -0700
From:      David Greenman <dg@root.com>
To:        Michael Dillon <michael@memra.com>
Cc:        freebsd-isp@freebsd.org
Subject:   Re: Does FreeBSD hash PCB's like BSDI ??? 
Message-ID:  <199608230418.VAA09955@root.com>
In-Reply-To: Your message of "Thu, 22 Aug 1996 20:15:54 PDT." <Pine.BSI.3.93.960822201347.14970T-100000@sidhe.memra.com> 

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>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



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