From owner-freebsd-hackers  Sat Jun 15 13:01:32 1996
Return-Path: owner-hackers
Received: (from root@localhost)
          by freefall.freebsd.org (8.7.5/8.7.3) id NAA12911
          for hackers-outgoing; Sat, 15 Jun 1996 13:01:32 -0700 (PDT)
Received: from gvr.win.tue.nl (root@gvr.win.tue.nl [131.155.210.19])
          by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id NAA12906
          for <freebsd-hackers@freebsd.org>; Sat, 15 Jun 1996 13:01:26 -0700 (PDT)
Received: by gvr.win.tue.nl (8.6.12/1.53)
    id WAA24925; Sat, 15 Jun 1996 22:01:14 +0200
From: guido@gvr.win.tue.nl (Guido van Rooij)
Message-Id: <199606152001.WAA24925@gvr.win.tue.nl>
Subject: Re: Incremental [s]pwd.db updates?
To: taob@io.org (Brian Tao)
Date: Sat, 15 Jun 1996 22:01:14 +0200 (MET DST)
Cc: freebsd-hackers@freebsd.org
In-Reply-To: <Pine.NEB.3.92.960615143453.1497C-100000@zap.io.org> from Brian Tao at "Jun 15, 96 02:57:58 pm"
X-Mailer: ELM [version 2.4ME+ PL17 (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-hackers@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

Brian Tao wrote:
>     About 9 months ago, Guido van Rooij (guido@gvr.win.tue.nl) was
> working on a modification to pwd_mkdb that allows for incremental
> updating of the databases, for use with passwd/chfn/chsh and friends
> when only the record of one user needs changing.  What is its current
> status?
> 

I'm working on it right now. I will have a -current version first.
Given the release plans for 2.1.5 I dont think it will make
it to that version. I can send you some patches if you like. Use at your
own risk.

>     We are moving one of our authentication servers from a BSD/OS 2.0
> machine (which does have incremental pwd.db updating) to a FreeBSD
> 2.2-SNAP machine (which does not).  It currently contains 14271 lines,
> but will be growing to 150,000 or more before September.  No problems
> with uids > 65536, but it takes a little over 4 minutes to rehash on
> an otherwise idle P100.  With 150,000 users it will take the better
> part of an hour for each update.
> 

It will only speed up chpass, passwd, chfn, chsh. Plus a minor speedup
for pwd_mkdb in general. Plus adding users can be done more effeciently.
But the you have to tweak you adduser a bit (I dont have patches for
the standard adduser in FreeBSD). A vipw(8) will still take a long
time.

-Guido