From owner-freebsd-questions@FreeBSD.ORG  Thu Aug 22 05:32:48 2013
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTP id 04A9D4E6;
 Thu, 22 Aug 2013 05:32:48 +0000 (UTC)
 (envelope-from olivier2553@gmail.com)
Received: from mail-qa0-x22a.google.com (mail-qa0-x22a.google.com
 [IPv6:2607:f8b0:400d:c00::22a])
 (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits))
 (No client certificate requested)
 by mx1.freebsd.org (Postfix) with ESMTPS id A9BD42E79;
 Thu, 22 Aug 2013 05:32:47 +0000 (UTC)
Received: by mail-qa0-f42.google.com with SMTP id bv4so111082qab.1
 for <multiple recipients>; Wed, 21 Aug 2013 22:32:46 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:sender:in-reply-to:references:date:message-id:subject
 :from:to:cc:content-type;
 bh=DspR+HzIrLzbcHWDgJRqalkmqhEmSrXeqkgLICFfBn0=;
 b=e4h1RErbgx0tSXWJmQkS1pRjPS2ZQdbM8xoqmt9doSipysJuys3B4WpE5pkPTYuf5o
 OSgktlWgCAt4iuymRCjFvVt/NRhptlEdTzvLqmKAaTu+3i+dpwJQuof7FPrLZpdQd3c6
 00QYKlV0ErEU+PuGCvvtepAr1j9R9isbEz8+FBovPSLykLlOjsV1qiuS5UU2oOSmutmh
 jiwynlDAOEimcaRXLusSDch4bcaIQ/IShS8SyxgtxZo4l7wFaiSEyZJoCKcdwABAuoUp
 I+MHAmcwn0UgkKlA0W1W1/hjhemcj10efyzZOborscfTRELkDKdSxpB91NLWh/XZmQI2
 mlvQ==
MIME-Version: 1.0
X-Received: by 10.224.7.67 with SMTP id c3mr15251640qac.6.1377149566834; Wed,
 21 Aug 2013 22:32:46 -0700 (PDT)
Sender: olivier2553@gmail.com
Received: by 10.49.62.41 with HTTP; Wed, 21 Aug 2013 22:32:46 -0700 (PDT)
In-Reply-To: <1377103734.1265.12517189.74648DF1@webmail.messagingengine.com>
References: <u9zjsb8bkz.fsf@banyan.cs.ait.ac.th> <5214E6EB.30102@fjl.co.uk>
 <1377102971.29516.12511917.7D1FFD58@webmail.messagingengine.com>
 <1377103734.1265.12517189.74648DF1@webmail.messagingengine.com>
Date: Thu, 22 Aug 2013 12:32:46 +0700
X-Google-Sender-Auth: u3WDgMlUo-J7HfqwU9YUuT7IMtk
Message-ID: <CA+g+Bviap5e+fsqbJYejB_GUxNSUkcuD+a6d1BvwCdQNDmQW0g@mail.gmail.com>
Subject: Re: Renumber users and groups
From: Olivier Nicole <olivier.nicole@cs.ait.ac.th>
To: Mark Felder <feld@freebsd.org>
Content-Type: text/plain; charset=ISO-8859-1
Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 22 Aug 2013 05:32:48 -0000

Thank you,

>> Those solutions sound pretty handy if I need to move the files at the
>> same time. mtree should do this in-place with minimal fuss as it's just
>> confirming permissions and ownership on all files.
> I also just thought of an idea I need to benchmark: running mtree with
> and without nscd. I bet nscd could speed it up a lot.

I did try mtree on my own files, counting for 20% of the total size,
and it took only seconds.

I bet other users may have many more smaller files, but it's all a
matter of minutes, so it is fast enough.

Best regards,

Olivier