Date: Fri, 29 Apr 2011 01:48:37 +0000 From: Malcolm Waltz <mwaltz@PACIFIC.EDU> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable List <freebsd-stable@freebsd.org> Subject: Re: ZFS vs OSX Time Machine Message-ID: <5ED49CD2-5FF2-4110-8EEA-F754373D16F3@pacific.edu> In-Reply-To: <20110429010829.GA36744@icarus.home.lan> References: <537A8F4F-A302-40F9-92DF-403388D99B4B@gsoft.com.au> <20110428195601.GA31807@icarus.home.lan> <AF725CFF-86A4-4D65-A26E-496F6B9BD33E@gsoft.com.au> <20110429010829.GA36744@icarus.home.lan>
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On Apr 28, 2011, at 6:08 PM, Jeremy Chadwick wrote: Be aware there are all sorts of caveats/complexities with iSCSI on FreeBSD. There are past threads on -stable and -fs talking about them in great detail. I personally wouldn't go this route. Why can't OS X use CIFS? It has the ability to mount a SMB filesystem, right? Is there some reason you can't mount that, then tell TM to write its backups to /mountedcifs? Ahh... I see. Well this works perfectly (iSCSI on ZFS): http://www.nexenta.org/ Perhaps we will see some improvements in the future. As for CIFS, yes some people do that. I wouldn't, but whatever. Certainly= you won't see _better_ performance. Most people choose AFP for this (as d= id the original poster). http://www.nickebo.net/tag/benchmark/ (there are plenty of others) As you can read in my previous posts, Time Machine needs block storage. If= you don't use block storage, it will emulate block storage using a disk im= age, which in this case is generating ~80000 files in one directory (sparse= -bands). Good luck with that. If iSCSI is not stable on FreeBSD, then it's probably best not to store Tim= e Machine data on FreeBSD. Some people don't seem to have issues with this= (as one other poster mentioned). I suppose it depends on how much and wha= t kind of data you are backing up. I can say that if you are backing up a media library and other normal user = data using Time Machine, it definitely performs poorly (unusable) after a w= hile if you are using anything but block based storage. If it hasn't happe= ned to you yet, just wait. It will.
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