Date: Thu, 18 Dec 2014 09:37:30 -0600 From: Adam Vande More <amvandemore@gmail.com> To: Alan Somers <asomers@freebsd.org> Cc: "Russell L. Carter" <rcarter@pinyon.org>, FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: compiling on nfs directories Message-ID: <CA%2BtpaK2j8_FzT-D5=Sk8_0UajNnHj5Gn0c4q%2Bvt_WR8AMRmMHg@mail.gmail.com> In-Reply-To: <CAOtMX2gG4CA%2BFhDPcDb7b7vko6e_0mdjnXz7UBFF85TT2tWunw@mail.gmail.com> References: <1480362493.14973677.1418857654052.JavaMail.root@uoguelph.ca> <54922412.6090903@pinyon.org> <54922E49.4050906@egr.msu.edu> <549233E2.7050009@pinyon.org> <CAOtMX2gG4CA%2BFhDPcDb7b7vko6e_0mdjnXz7UBFF85TT2tWunw@mail.gmail.com>
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On Thu, Dec 18, 2014 at 9:29 AM, Alan Somers <asomers@freebsd.org> wrote: > > On Wed, Dec 17, 2014 at 6:54 PM, Russell L. Carter <rcarter@pinyon.org> > wrote: > > On 12/17/14 18:30, Adam McDougall wrote: > >> > >> On 12/17/2014 19:47, Russell L. Carter wrote: > >>> > >>> > >>> > >>> On 12/17/14 16:07, Rick Macklem wrote: > >> > >> > >>>> If this is using an exported ZFS volume, it would be nice if you > >>>> could do the same test using an exported UFS file system, to see if > >>>> this is ZFS related. > >>> > >>> > >>> It is indeed using exported ZFS filesystems, but unfortunately I have > >>> no USF filesystems available to test. > >>> > >>> Russell > >> > >> > >> Can you create a zvol, newfs it with ufs and export it? > > > > > > Maybe. I would love to help if I can, w/o disrupting my existing > > carefully planned physical disk layouts. I'm a zfs novice here, do I > > need free space unallocated to existing zpools, or can I shrink an > > existing pool? (assuming that zfs can transmute lead into gold, with > > the right incantations). I have plenty of "free" space allocated to > > existing pools that span my physical drives. > > > > If I have to add a physical drive (that's possible, but it will be a > > slow drive sitting on my shelf) then I need to wait until I get back > > from holiday travels. > > > You don't need to screw with your pools at all. A zvol is like a > managed like a ZFS filesystem, except it's a block device. You can > create one and mount it with a command like this: > zfs create -V 8g mypool/myvol > newfs [options] /dev/mypool/myvol > mount /dev/mypool/myvol /mnt Using a flash drive or temporary drive seems like a much more comprehensive test as you can fully eliminate ZFS from the picture. Which is the point of the exercise. -- Adam
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