Date: Tue, 28 Aug 2012 10:13:44 +0200 From: Guido Falsi <mad@madpilot.net> To: Matthew Seaman <matthew@FreeBSD.org> Cc: freebsd-fs@FreeBSD.org Subject: Re: ZFS snapshot Folder Disappearing Message-ID: <20120828081344.GA20350@micro.madpilot.net> In-Reply-To: <503C66C2.5010209@FreeBSD.org> References: <CAG27QgQdnQftnuk3o1ehD1W=0_ABsfu1KOsjxY%2Bc8B6iasSMdQ@mail.gmail.com> <CAM-i3ihGpwYZcYWuwxu8qk-3yASKQUE0hCmd4Dx%2BbWOoO9Yeog@mail.gmail.com> <CAG27QgT=yEv-BGFaqA79Bz5g9LLhMQwJKcNTDOt-=yESD5jCUA@mail.gmail.com> <503C5F2A.701@FreeBSD.org> <503C633B.2070508@madpilot.net> <503C66C2.5010209@FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Aug 28, 2012 at 07:35:46AM +0100, Matthew Seaman wrote: > > I got hit by this a few times too. Ti me it looks like it's easier to > > get this problem on more low spec machines(low spec regarding ZFS, so > > anything under 3-4 GiB ram is on the low side, for example). > > My machine has 8GB RAM which I wouldn't call low spec particularly. No, Definitely not. But in my experience when I have upgraded machines showing this problem it's frequency decreased a lot. > > > Using nullfs across snapshots did trigger this easily. I did that to > > have a nullfs mounted snapshot of the whole filesystem structure. I'm > > using read only zfs clones for that now. > > Interesting. I do have certain ZFSes null-mounted into a jail. I > wonder if that's a common factor? That could be a common trigger in my opinion, but it just exposes some other problem. I know very little about ZFS internals so I have been unable to dig any further. -- Guido Falsi <mad@madpilot.net>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20120828081344.GA20350>