Date: Fri, 25 Mar 2011 21:14:39 +0100 From: Alexander Leidinger <Alexander@Leidinger.net> To: gahr@freebsd.org Cc: Baptiste, current@freebsd.org, Julien Laffaye <jlaffaye@freebsd.org>, Daroussin <bapt@freebsd.org>, ports@freebsd.org, hackers@freebsd.org Subject: Re: [ECFT] pkgng 0.1-alpha1: a replacement for pkg_install Message-ID: <20110325211439.00004dda@unknown> In-Reply-To: <20110325153520.GB23861@gahrfit.gahr.ch> References: <20110325101111.GA36840@azathoth.lan> <20110325150653.21132ej6abxmjpgk@webmail.leidinger.net> <AANLkTikxi%2BjgnLrFg57o1N-Qzip9juaqXGzK2eYLkpFr@mail.gmail.com> <20110325153814.20287h1594npcu80@webmail.leidinger.net> <AANLkTimZ5B4bYp1_wNLHbB_jSwcnzKvf7dpO35W1k1%2B2@mail.gmail.com> <20110325153520.GB23861@gahrfit.gahr.ch>
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On Fri, 25 Mar 2011 16:35:21 +0100 Pietro Cerutti <gahr@freebsd.org> wrote: > On 2011-Mar-25, 15:03, Julien Laffaye wrote: > > >>> What about DB corruption/loss? Do you keep > > >>> the /var/db/pkg/<package>/xxx files even with pkgng and only > > >>> use the DB as a way to speed up some work (so > > >>> the DB corruption just requires to run pkg2ng), or are you lost > > >>> of the DB is > > >>> lost? > > >>> > > >> > > >> Nothing is done about DB corruption/loss, I am not sure we need > > >> to do something. > > >> Maybe. > > > > > > I would say "for sure". Info: In Solaris 10 sqlite is used for > > > the service managenemt framework (SMF). It is possible that the > > > DB is corrupt in some bad situations. In this case you have to > > > rebuild the DB (script provided, been there, had to use it). > > > > If sqlite is properly used with transactions, it is very hard to > > corrupt the database. But if hardware lies to us and say that the And as I told above, I even had such a case (more than once), and the hardware was not buggy. What do you want to tell in this case, "life sucks, reinstall everything"? > > data is on disk whereas it isnt... what can we do? Sometimes you have to stay with broken hardware. > > Another potential problem is fsync(), but if it is broken on FreeBSD > > we want to fix it! > > > > BTW, the goal is to only have the database and not the flat files. > > If you are paranoid about power outage, use something like zfs > > snapshots... There are more FS than only ZFS (personally I use ZFS, and I have snapshots, but this is not a good solution for this problem). As I told already, if it isn't automatic, nearly nobody will use it. And the package management stuff has to be automatic, no freshman will think about setting up a snapshot script when he starts to use packages/ports. > No need to look for strange scenarios, I'm surely going to sudo rm -f > the file more sooner than later, so... maybe just save a copy? A copy or two would be enough, but it has to be done automatically, and once a day is not enough. A copy after each X modifications maybe (for suitable definitions of X and 'modifications'). Bye, Alexander.
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