Date: Sun, 8 Aug 2010 14:30:25 +0100 From: krad <kraduk@googlemail.com> To: Matthew Seaman <m.seaman@infracaninophile.co.uk> Cc: Dick Hoogendijk <dick@nagual.nl>, freebsd questions <freebsd-questions@freebsd.org> Subject: Re: zfs question Message-ID: <AANLkTinhpsOfDfP0kEh00FcFqGJMg7AiMUyPG%2B42KQYA@mail.gmail.com> In-Reply-To: <4C5EA29B.7040401@infracaninophile.co.uk> References: <4C5E9874.3030606@nagual.nl> <4C5EA29B.7040401@infracaninophile.co.uk>
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On 8 August 2010 13:27, Matthew Seaman <m.seaman@infracaninophile.co.uk>wrote: > On 08/08/2010 12:43:48, Dick Hoogendijk wrote: > > Years back I ran FreeBSD, so I have some experience. The last couple of > > years I ran Solaris, followed by Opensolaris. I am very satisfied. > > However, considering the troubles after Oracle took over I have rebuild > > my server system under FreeBSD-8.1 (now running as a virtual machine > > under VirtualBox). All works very well and smooth so I'm going to > > transfer this VM to a real seperate harddisk. > > > > I have a couple of questions: > > > > [1] Transfering the VM is best done using dump/restore I guess? (This > > after a smallest creation of fbsd81 on the new harddisk) ? > > Yes, that would be a pretty good way of doing your vtophys migration. > > > My server has five disks: 1 PATA (160Gb), 2 SATA2 (500Gb) and 2 SATA2 > > (1Tb) The fist is disabled at the moment and the others are ZFS mirrors > > under opensolaris. they are not usable for freebsd because the zfs > > versions don't match. I will have to rebuild. ;-) > > % zpool list -H -o version zroot > 14 > % zfs list -H -o version / > 3 > > Those are the latest available under 8-STABLE -- 8.1-RELEASE will be the > same. > > > However, I'm a bit worried about the status of ZFS on FreeBSD-8.1 I > > don't want my system to boot off ZFS like I have now on OpenSolaris-b134 > > > > I think it is wisest to have the 160Gb IDE drive installed for FreeBSD > > system drive w/ UFS2 and after that create two ZFS mirrors from my SATA > > drives. > > Hmmm... well, booting FreeBSD off ZFS works perfectly well. Apart from > the lack of support in sysinstall, I can't see any good reasons to avoid > it. However, it's your system, and booting from UFS also works very > well, so do whatever pleases you. > > There's more of a question over whether it's a good idea to put swap > onto zfs -- I think the recommendation is still to prefer using a raw > partition or gmirror for that. > > > Is ZFS (v14) ready for production on FreeBSD-8.1 and if yes, will I > > still need special settings? The server system is 64bits and has 3Gb > > memory. > > Yes. It works very well. > > On amd64 you'll get a pretty reasonable setup out of the box (so to > speak) which will work fine for most purposes. Of course, if your > system has particularly demanding IO patterns, then you may have to > tweak some loader.conf or sysctl parameters to get the best results. > But that's hardly unique to ZFS. > > > I hope to get some answers or good reading points. > > The FreeBSD Wiki entries on ZFS are very useful to read: > > http://wiki.freebsd.org/ZFS (and the links from that page) > > especially the recipes for installing various different ZFS based > configurations: eg. http://wiki.freebsd.org/RootOnZFS > > Cheers, > > Matthew > > -- > Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard > Flat 3 > PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate > JID: matthew@infracaninophile.co.uk Kent, CT11 9PW > > if you want an easy zfsroot install use the pcbsd installer as it supports zfs installation and can install plain freebsd
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