From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.1 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HTML_MESSAGE,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 8370 invoked from network); 13 Dec 2020 02:09:36 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 13 Dec 2020 02:09:36 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id D55209B92B; Sun, 13 Dec 2020 12:09:30 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id E014F93D3C; Sun, 13 Dec 2020 12:09:16 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=pass (1024-bit key; unprotected) header.d=ccc.com header.i=@ccc.com header.b="P3ibGlkV"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 7B3FB93D37; Sun, 13 Dec 2020 12:09:13 +1000 (AEST) Received: from mail-qt1-f175.google.com (mail-qt1-f175.google.com [209.85.160.175]) by minnie.tuhs.org (Postfix) with ESMTPS id 96A1493D29 for ; Sun, 13 Dec 2020 12:09:12 +1000 (AEST) Received: by mail-qt1-f175.google.com with SMTP id z9so9526784qtn.4 for ; Sat, 12 Dec 2020 18:09:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ccc.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=H0HYH6s94S71yDgcKOwynVfZeVAaPZ/egQKxoMh/B9k=; b=P3ibGlkVJyhZk7Y+UBH9UX96JfQJrFG00RkE0fyU0h+lfg4ehqXEXxu6Wd2h+V7Vsa bUIJBCcheJwQMhknB+Otbsb6+eK2ow/Py5QrQ3Zco4waGILGyI4gFW4e4y9DA6AnxIun W8AKkH+hQgwiVeQn6sCg7ne09FFEccebcY040= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=H0HYH6s94S71yDgcKOwynVfZeVAaPZ/egQKxoMh/B9k=; b=UvUMB1Hf2CulsaODJ7sc75v0TDFJfBgtpVu3yWMfBqKQx82UStgoHJF8oYSggA3vg+ LMTRSwzEQvyPSt33haOJ9X9Swsrc+94Ej25dGNBnNuUBErYYOh+o37jRnBF1QxPs9a4m d5BE5DLFzMjptrmB6zvOIxwc9inH2XdgC4oIA3pFzmG3UmRvA/QqlxaTN5nDip3nwLYG Ygm1+mMVql0eRrMe+vK0F5LHjlPX+38CekbnilBBTCw1aSg3SxXt2O2CQmSP1bDTJBnY oKQbHRraGtRU4wUU7TlbOUbiAfAGzn3MpTso3axacx89iRboaThxArIcKdsR/h9AMokW +mWw== X-Gm-Message-State: AOAM5339N1yWIZajOfIh46vBPaZobfaZYfm9hOCBy7oo/2Qd+JxXBmLr ZK/k6ouNzRZ6qIIKMwMCUvSYPRgu8MHtQJxDDbVsbA== X-Google-Smtp-Source: ABdhPJzS/uZPyZJFy0/KwxyaqUvlPMThewQekccN62sVEIS2aF1Xb1jDwZxvIJHHvnwVjRKtXXv0DkE+SnstAfQX32o= X-Received: by 2002:ac8:2a8f:: with SMTP id b15mr15642664qta.33.1607825351456; Sat, 12 Dec 2020 18:09:11 -0800 (PST) MIME-Version: 1.0 References: <20201213020219.85F3D18C0A6@mercury.lcs.mit.edu> In-Reply-To: <20201213020219.85F3D18C0A6@mercury.lcs.mit.edu> From: Clem Cole Date: Sat, 12 Dec 2020 21:08:45 -0500 Message-ID: To: Noel Chiappa Content-Type: multipart/alternative; boundary="000000000000ef49f905b64f02bd" Subject: Re: [TUHS] Were cron and at done at the same time? Or one before the other? X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: The Eunuchs Hysterical Society Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" --000000000000ef49f905b64f02bd Content-Type: text/plain; charset="UTF-8" Amen On Sat, Dec 12, 2020 at 9:02 PM Noel Chiappa wrote: > > From: "Theodore Y. Ts'o" > > > Having a clean architecture is useful in so far as it makes reduces > > maintenance overhead and improves reliability. > > I would put it differently, hence my aphorism that: "the sign of great > architecture is not how well it does the things it was designed to do, but > how > well it does things you never imagined it would be used for". > > I suppose you could say that reducing maintenance and improving reliability > are examples of the natural consequences of that, but to me those are > limited > special cases of the more general statement. My sense is that systems > decline > over time because of what I call 'system cancer': as they are modified to > do > more and more (new) things, the changes are not usually very cleanly > integrated, and eventually one winds up with a big pile. (Examples of this > abound; I'm sure we can all think of several.) > > Noel > > --000000000000ef49f905b64f02bd Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Amen

On Sat, Dec 12, 2020 at 9:02 PM Noel Chiappa = <jnc@mercury.lcs.mit.edu&= gt; wrote:
=C2= =A0 =C2=A0 > From: "Theodore Y. Ts'o"

=C2=A0 =C2=A0 > Having a clean architecture is useful in so far as it ma= kes reduces
=C2=A0 =C2=A0 > maintenance overhead and improves reliability.

I would put it differently, hence my aphorism that: "the sign of great=
architecture is not how well it does the things it was designed to do, but = how
well it does things you never imagined it would be used for".

I suppose you could say that reducing maintenance and improving reliability=
are examples of the natural consequences of that, but to me those are limit= ed
special cases of the more general statement. My sense is that systems decli= ne
over time because of what I call 'system cancer': as they are modif= ied to do
more and more (new) things, the changes are not usually very cleanly
integrated, and eventually one winds up with a big pile. (Examples of this<= br> abound; I'm sure we can all think of several.)

=C2=A0 =C2=A0 =C2=A0 =C2=A0 Noel

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