From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1NWRiR-0003LR-CR for garchives@archives.gentoo.org; Sun, 17 Jan 2010 09:46:39 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 21262E06C1; Sun, 17 Jan 2010 09:46:25 +0000 (UTC) Received: from mail-ew0-f224.google.com (mail-ew0-f224.google.com [209.85.219.224]) by pigeon.gentoo.org (Postfix) with ESMTP id D1954E06C1 for ; Sun, 17 Jan 2010 09:46:24 +0000 (UTC) Received: by ewy24 with SMTP id 24so2408919ewy.26 for ; Sun, 17 Jan 2010 01:46:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=uG7bMvklwAAosb21SPVtAIu8Zwy5NTHgE51KglrVyZM=; b=WLBTGrT29Iov+3KI6uRnxxWXCClSnY4XQMianQlt2ycwXD2o+2d5vLx58NnEkBgv/z mhSI88iIBfJMhaZoDbKEtQlbxMoZg0y9IBYJ5zDadwmLKZGXLsOVpp0S8P3C2NS3MwmI dsnuFc+Dpfrw2K1cacSSXocl97S2sATawNXXE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=bAW5awNmcgR5p/s/NBUiuHbkeFdFTKy2AcDfz1undjSKoSDfi88rea5D27NMW4djoX GnZ40MYKDRFSeq6JEDVSGEO4ASeyNTo/wLvVCNgQHiyKQZ22qlbN5PEYxA0J+iWC2PLF P1O8+OKePffGWky20AQpxaDxO3ng0vuxSOzN8= Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-dev@lists.gentoo.org Reply-to: gentoo-dev@lists.gentoo.org MIME-Version: 1.0 Received: by 10.216.86.3 with SMTP id v3mr1649382wee.165.1263721584177; Sun, 17 Jan 2010 01:46:24 -0800 (PST) In-Reply-To: <20100117092411.GA800@eric.schwarzvogel.de> References: <20091026015005.GA12250@hrair.hsd1.ca.comcast.net> <7c612fc61001111435s5caaf80dx4629d81447ab52e8@mail.gmail.com> <20100112101252.1d63a6a5@snowmobile> <20100112231223.GC6656@hrair> <20100117085914.4774f9fa@snowmobile> <20100117092411.GA800@eric.schwarzvogel.de> Date: Sun, 17 Jan 2010 09:46:24 +0000 Message-ID: <82dd739f1001170146u40fa2698qd6089881aabfb523@mail.gmail.com> Subject: Re: [gentoo-dev] adding a modification timestamp to the installed pkgs database (vdb) From: Ciaran McCreesh To: gentoo-dev@lists.gentoo.org Content-Type: text/plain; charset=ISO-8859-1 X-Archives-Salt: a316ab15-6afb-4732-9ce6-e7a6d0bd5afa X-Archives-Hash: 50e97708f56b59b7b0344a5a7faa4639 2010/1/17 Tobias Klausmann : >> No, we'd not do it that way. If we're ditching VDB, the only sane way >> to do it is to ditch it with an rm -fr when creating the new layout. >> Keeping two sets of data around is going to lead to breakage no matter >> how well we do things. > > Please also provide a downgrade path, i.e. a way to go back from > the new DB version to the current one should it be necessary (if > there is no such path, Murphy will see to it that the new format > breaks in interesting[0] ways). That probably wouldn't be possible. One of the reasons we want to ditch VDB is to allow multiple slots of the same cat/pkg-ver to be installed in parallel (which is in turn necessary to allow some of the more hideous dynamic slot abuses that people are after). VDB doesn't support that, so you probably won't be able to go back once you've started using new features. *shrug* all of this is years off, anyway. It's at least EAPI 5 territory. We can work all this out later if EAPI 4 ever happens. -- Ciaran McCreesh