From owner-freebsd-questions@freebsd.org Tue Oct 18 12:46:15 2016 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0F517C1526E for ; Tue, 18 Oct 2016 12:46:15 +0000 (UTC) (envelope-from galtsev@kicp.uchicago.edu) Received: from cosmo.uchicago.edu (cosmo.uchicago.edu [128.135.70.90]) by mx1.freebsd.org (Postfix) with ESMTP id E3745C30 for ; Tue, 18 Oct 2016 12:46:14 +0000 (UTC) (envelope-from galtsev@kicp.uchicago.edu) Received: by cosmo.uchicago.edu (Postfix, from userid 48) id 762C8CB8CBC; Tue, 18 Oct 2016 07:46:13 -0500 (CDT) Received: from 69.209.239.247 (SquirrelMail authenticated user valeri) by cosmo.uchicago.edu with HTTP; Tue, 18 Oct 2016 07:46:13 -0500 (CDT) Message-ID: <60719.69.209.239.247.1476794773.squirrel@cosmo.uchicago.edu> In-Reply-To: <20161018074415.0f6575675db30d0b83d9b8ec@sohara.org> References: <20161018074415.0f6575675db30d0b83d9b8ec@sohara.org> Date: Tue, 18 Oct 2016 07:46:13 -0500 (CDT) Subject: Re: pw add user slow From: "Valeri Galtsev" To: "Steve O'Hara-Smith" Cc: freebsd-questions@freebsd.org Reply-To: galtsev@kicp.uchicago.edu User-Agent: SquirrelMail/1.4.8-5.el5.centos.7 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 18 Oct 2016 12:46:15 -0000 On Tue, October 18, 2016 1:44 am, Steve O'Hara-Smith wrote: > On Mon, 17 Oct 2016 23:36:33 +0100 > Paul Macdonald wrote: > >> >> Hi, >> >> I have to migrate an imap server, which uses about 6000 local accounts >> for mail delivery >> >> I'm using a script that creates system acounts using: >> >> /usr/sbin/pw adduser $LOCAL_USER -u$UID-gGID-d $PATH -s/bin/false >> >> I'm finding this grows ever more slow, up to 10 seconds per account on a >> SATA box , and on a test SSD box ( 20 acc's per second initially) even >> that slows to about 1 account created per second. >> >> why does this slow down as more accounts are added? > > Because for each one it updates text files (passwd and > master.passwd) and regenerates databases (pwd.db and spwd.db) from the > text > files. The fastest way to do this sort of thing is to directly update > passwd and master.passwd and then run pwd_mkdb. It appears to be sufficient to only edit master.passwd; pwd_mkdb will re-generate passwd file from master.passwd. Valeri > > -- > Steve O'Hara-Smith > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" > ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++