From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andreas Enge Subject: Re: Rollback problems Date: Fri, 25 Jan 2013 15:48:03 +0100 Message-ID: <201301251548.03401.andreas@enge.fr> References: <201301232148.46744.andreas@enge.fr> <87622mhthi.fsf@karetnikov.org> <1359122091.2545.2.camel@Nokia-N900> Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="Boundary-01=_jspARnbhfj51sMN" Content-Transfer-Encoding: 7bit Return-path: Received: from eggs.gnu.org ([208.118.235.92]:40897) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TykZn-0007TH-GJ for bug-guix@gnu.org; Fri, 25 Jan 2013 09:48:23 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TykZg-0006zI-BS for bug-guix@gnu.org; Fri, 25 Jan 2013 09:48:19 -0500 Received: from moutng.kundenserver.de ([212.227.126.186]:52849) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TykZg-0006z3-1n for bug-guix@gnu.org; Fri, 25 Jan 2013 09:48:12 -0500 In-Reply-To: <1359122091.2545.2.camel@Nokia-N900> List-Id: Bug reports for GNU Guix List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org Sender: bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org To: bug-guix@gnu.org, Alex Sassmannshausen --Boundary-01=_jspARnbhfj51sMN Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Am Freitag, 25. Januar 2013 schrieb Alex Sassmannshausen: > I guess a generation would only be destroyed at a junction, not when > moving back and forth in straight lines. > A ------> B ------> C > You could travel from C back to A and back to C without having to > re-install packages... Yes, that is the idea. However, at a junction, all the past future would be lost: Once at A, if you install B', then you start an alternate future, and B and C would be deleted. Andreas --Boundary-01=_jspARnbhfj51sMN Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: 7bit

Am Freitag, 25. Januar 2013 schrieb Alex Sassmannshausen:

> I guess a generation would only be destroyed at a junction, not when

> moving back and forth in straight lines.

> A ------> B ------> C

> You could travel from C back to A and back to C without having to

> re-install packages...

Yes, that is the idea. However, at a junction, all the past future would be lost: Once at A, if you install B', then you start an alternate future, and B and C would be deleted.

Andreas

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