Date: Tue, 06 Mar 2012 02:21:51 -0600 From: Doug Barton <dougb@FreeBSD.org> To: Adrian Chadd <adrian@freebsd.org> Cc: stable@freebsd.org, current@freebsd.org, =?UTF-8?B?eiBXxIVzaWtvd3NraQ==?= <lukasz@wasikowski.net>, Arnaud Lacombe <lacombar@gmail.com>, "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>, Alexander Leidinger <Alexander@leidinger.net> Subject: Re: flowtable usable or not Message-ID: <4F55C91F.4040503@FreeBSD.org> In-Reply-To: <CAJ-VmomZ609YvU4XwcW3WiAmBqf51xVa584XVj-1%2B5MF=vzzLg@mail.gmail.com> References: <20120221143537.Horde.deyFDZjmRSRPQ52pxBIpnLA@webmail.leidinger.net> <4F4D51CB.2010508@FreeBSD.org> <4F4D5E5D.9040302@FreeBSD.org> <4F4DD288.5060106@FreeBSD.org> <CAHM0Q_O%2BCt6yhRL=B9oxgkL8EgLxZdo7-KFO2C8HqiN1=Kx_bw@mail.gmail.com> <4F4ED889.2070608@FreeBSD.org> <4F500BB9.4040307@FreeBSD.org> <CAHM0Q_OfeB7Kb=pgjGq0uffLJdJROGoCaGz=25Jito-kweAxRQ@mail.gmail.com> <4F5088CA.1090108@FreeBSD.org> <CAHM0Q_MZM6Gn_zPzxz5tLuzPOW=kK9YxqmrLTyitvGfAPhrkbw@mail.gmail.com> <4F510FBD.50008@FreeBSD.org> <CAHM0Q_M7mYV5r_AZEcAxi2wWuQ8u0aXTG-H1YaCLXLUytQd9wA@mail.gmail.com> <4F5117A6.2030003@FreeBSD.org> <CAHM0Q_Mcf=2S_niBf=S6foS7W7pdgKVcOp9n26nMzzc33igp8w@mail.gmail.com> <CAJ-Vmo=3k59ss77AC8VstVfwHruvoH=6tKek7Z1nsL9YWoOXqA@mail.gmail.com> <4F5285CF.3010001@FreeBSD.org> <CAJ-VmomuSTAgtfYUcAepDkCUr5x%2BbVgmdyOhKjBPSSQ5GcxTWw@mail.gmail.com> <4F55B5E3.1080207@FreeBSD.org> <CAJ-VmomZ609YvU4XwcW3WiAmBqf51xVa584XVj-1%2B5MF=vzzLg@mail.gmail.com>
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On 3/6/2012 2:12 AM, Adrian Chadd wrote: > You haven't been bitten by the storage layer or filesystem hackery > bits which has caused filesystem corruption. :) Ummm, I have, actually. I was one of the early adopters of SU+J and complained loudly when it ate my /var/ for lunch. I also use a lot of separate slices/partitions, so my system partition isn't getting written to very often, isn't using SU+J, and almost always comes up clean after a crash. My layout looks like this: FreeBSD 1 & 2 are the same: / + /usr /var /tmp (memory disk) /usr/local/ (this is the big partition, things like ports WRKDIRPREFIX and /usr/obj go here) Then I have separate ext2fs filesystems for /home, /data (cvs, svn, other big trees). These are accessible from my Linux partition, which is also where the shared swap partition is. Using ext2fs for things I really care about (like /home) or things that would take a long time to reproduce (like cvs and svn trees) has helped avoid some of the more exciting corruption/data loss events, and everything on the /usr/local's is either backed up, or trivially reproducable. > That said, FFS+SUJ has made recover-from-kernel-panic so much less > painful. Thankyou Jeffr and others! It's also made a mess out of snapshots ... The only thing I use SU+J for is /var and /usr/local (see above). > What I tend to do is either run current on a VM or organise some > dedicated -current laptops. And run the bits of -current I'm testing > on -8 and -9. Well you get a gold start for actually running it at all, so there you go. :) Doug
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