Date: Wed, 11 Aug 2010 00:00:52 +1000 From: David Rawling <djr@pdconsec.net> To: freebsd-questions@freebsd.org Subject: Re: zfs question Message-ID: <4C615B94.3010207@pdconsec.net> In-Reply-To: <AANLkTinSTwHJvSsJ_TgfjX7ubJNdee4v3hLzXAeC3R=%2B@mail.gmail.com> References: <4C5E9874.3030606@nagual.nl> <4C5EA29B.7040401@infracaninophile.co.uk> <4C5ECF42.20509@nagual.nl> <AANLkTi=6B1ho0vP1ccVwwTXvcuyr8w8t5_8Whj42D8R2@mail.gmail.com> <AANLkTinSTwHJvSsJ_TgfjX7ubJNdee4v3hLzXAeC3R=%2B@mail.gmail.com>
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On 9/08/2010 2:52 AM, krad wrote: > On 8 August 2010 16:51, Adam Vande More<amvandemore@gmail.com> wrote: >> On Sun, Aug 8, 2010 at 10:37 AM, Dick Hoogendijk<dick@nagual.nl> wrote: >>> On 8-8-2010 14:27, Matthew Seaman wrote: >>>> 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. >>> One other thing comes to mind. I want a very robus, fast rockl solid >>> *server* >>> It will be a file- email and webserver mostly. >>> >>> Instead of using two ZFS mirrors I could also go for gmirror (I'm not >>> familiar with it, but it's been around for quite some time so it should >> be >>> very stable). I don't get the data integrity that way, but my files would >> be >>> safe, no? >>> >>> Also, using gmirror I could use "normal" BSD UFS filesystems and normal >>> swap files devided across all disks? >>> Or am I wrong, thinking this way. >>> >>> I'm not into fancy stuff; it has to be robust, fast and safe. >> >> You do not *need* amd64, however it would the best choice. I wouldn't even >> mess around with gmirror. It's great and I love it, but it has some >> serious >> drawback's compared to zfs mirroring. One is there is no integrity >> checking, and two is a full resyc is required on an unclean disconnect. >> >> http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/Mirror >> >> -- >> Adam Vande More > you could add a gjournal layer in there as well for better data integratity. > I think you can do softupdates + journal as well now although I have never > used it If you're after a rock solid server, then to be brutally honest it is less important to decide what you run than it is to choose something that you know well. Since you have 4 years of Solaris/OpenSolaris experience recently, you are likely to know ZFS better than gmirror. So I ask you to ponder - at four o'clock in the morning, with mail down, web servers down and all the disks holding your files failing to mount - which file system or disk structure would you prefer to try to troubleshoot? Dave. -- David Rawling Principal Consultant PD Consulting And Security Mob: +61 412 135 513 Email: djr@pdconsec.net
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