On 02/18/10 10:39, Tony MacDoodle wrote: > Interesting discussions.... > > How about exporting a ZFS volume as the guest domain backend? Can I then > change the size of the boot drive? And would I get better performance > that a flat file?
If you use ZFS volume then increasing the volume size is very simple, you just have to change the "volsize" property of the volume e.g.: # zfs set volsize=20G tank/myvol Performance to ZFS volumes are usually slightly better than flat files. alex. > On Thu, Feb 18, 2010 at 1:29 PM, Alexandre Chartre > <Alexandre.Chartre at sun.com <mailto:Alexandre.Chartre at sun.com>> wrote: > > > On 02/18/10 10:18, Joseph Balenzano wrote: > > Slightly, off topic, but relevant to expanding the size of a > disk back end that is a file. I created a vdisk which > was an iso file of the Solaris installation DVD. This was > defined as the cdrom for an LDom. During the installation of > the LDom it became apparent the iso file was corrupt, so I just > downloaded another iso and replaced the disk back end iso file > with it. Started the install again, but got the same sort of > install issues which lead me to believe that the file was still > corrupted. After a few more times of this happening it occurred > to me, that I never really replaced the original file because > another process (virtual disk server) had the old file open, so > it was still using it. Rebooting the control domain, solved my > problem. My question is, would a ldm unbind have accomplished > the same (i.e. forced the vds server to close the original file)? > > > Yes, that would have worked. The vdisk backend is opened/closed > when the > domain is bound/unbound. > > > If you indeed are going to expand a disk file, that is the back > end device, what would you have to do in the I/O domain and the > guest domain. to prepare for this? My guess is you could not > do this while the LDom that is consuming the disk is running. > > > It should work while the domain is running, because in that case the > file vnode (which is used by vds in the service domain) remains the > same, > only some information in the vnode will change; and the vds/vdc drivers > are designed to support a dynamic change of the backend size. > > alex. > > > > Alexandre Chartre wrote: > > > As Octave said, there's no easy way to expand the size of a > file. > It is possible to do it using some dd command or a simple C > program > but you have to be very careful because you can easily > corrupt or > destroy the file. > > To make things easier, I have opened a RFE to improve the > mkfile > command so that it can be used to increased the size of an > existing > file: > > 6925784 mkfile should be able to change/increase the size > of an existing file > > Please add yourself to the RFE so that it gets a higher > priority. > > alex. > > > On 02/18/10 08:03, Octave Orgeron wrote: > > Hi, > > If you are using sparse files on any file system, there > isn't an easy way of expanding the size of these files. > You would instead create another sparse file, add it to > the VDS service, and added as a VDISK to the guest. From > within the guest, the new VDISK can be formatted and > attached to your ZFS or SDS volumes. > > While sparse files are easy to move around and copy, you > could also use ZFS volumes which do perform better. > > *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* > > Octave J. Orgeron > Solaris Virtualization Architect and Consultant > Web: http://unixconsole.blogspot.com > E-Mail: unixconsole at yahoo.com <mailto:unixconsole at > yahoo.com> > > *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* > > > > > ------------------------------------------------------------------------ > *From:* Tony MacDoodle <tpsdoodle at gmail.com > <mailto:tpsdoodle at gmail.com>> > *To:* ldoms-discuss at opensolaris.org > <mailto:ldoms-discuss at opensolaris.org> > *Sent:* Wed, February 17, 2010 8:00:15 PM > *Subject:* [ldoms-discuss] Expanding ZFS Files for Bootdisks > > Is it possible to increase the size of the boot disks I > created for guest domains? They are currently files > created on a ZFS file system. For example, I have > created 60G boot disks for 2 guest domains on ZFS and I > now want to increase the size of these disks? > > Thanks > > > > ------------------------------------------------------------------------ > > _______________________________________________ > ldoms-discuss mailing list > ldoms-discuss at opensolaris.org > <mailto:ldoms-discuss at opensolaris.org> > http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss > > _______________________________________________ > ldoms-discuss mailing list > ldoms-discuss at opensolaris.org > <mailto:ldoms-discuss at opensolaris.org> > http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss > > > >
