Re: [zfs-discuss] virsh troubling zfs!?
On Tue, Nov 03, 2009 at 11:39:28AM -0800, Ralf Teckelmann wrote: > Hi and hello, > > I have a problem confusing me. I hope someone can help me with it. > I followed a "best practise" - I think - using dedicated zfs filesystems for > my virtual machines. > Commands (for completion): > [i]zfs create rpool/vms[/i] > [i]zfs create rpool/vms/vm1[/i] > [i] zfs create -V 10G rpool/vms/vm1/vm1-dsk[/i] > > This command creates the file system [i]/rpool/vms/vm1/vm1-dsk[/i] and the > according [i]/dev/zvol/dsk/rpool/vms/vm1/vm1-dsk[/i]. > (Clarification) Your commands create two filesystems: rpool/vms rpool/vms/vm1 You then create a ZFS Volume: rpool/vms/vm1/vm1-dsk which results in associated dsk and rdsk devices being created as: /dev/zvol/dsk/rpool/vms/vm1/vm1-dsk /dev/zvol/rdsk/rpool/vms/vm1/vm1-dsk These two nodes are artifacts of the zfs volume implementation and are required to allow zfs volumes to emulate traditional disk devices. They will appear and disappear accordingly as zfs volumes are created and destroyed. > If I delete a VM i set up using this filesystem via[i] virsh undefine vm1[/i] > the [i]/rpool/vms/vm1/vm1-dsk[/i] gets also deleted, but the > [i]/dev/zvol/dsk/rpool/vms/vm1/vm1-dsk[/i] is left. > virsh undefine does not delete filesystems, disks or any other kind of backing storage. In order to delete the three things you created, you need to issue: zfs destroy rpool/vms/vm1/vm1-dsk zfs destroy rpool/vms/vm1 zfs destroy rpool/vms or (more simply) you can do it recursively, if there's nothing else to be affected: zfs destroy -r rpool/vms Obviously you need to be careful with recursive destruction that no other filesystems/volumes are affected. > Without [i]/rpool/vms/vm1/vm1-dsk[/i] I am not able to do [i]zfs destroy > rpool/vms/vm1/vm1-dsk[/i] so the [i]/dev/zvol/dsk/rpool/vms/vm1/vm1-dsk[/i] > could not be destroyed "and will be left forever"!? > > How can I get rid of this problem? You don't have a problem. When the zfs volume is destroyed (as I describe above), then the associated devices are also removed. > -- > This message posted from opensolaris.org > ___ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss Hope that helps. Gary -- Gary Pennington Solaris Core OS Sun Microsystems gary.penning...@sun.com ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] howto resize/extend an existing ZFS volume ?
On Fri, Jun 20, 2008 at 08:20:29AM -0700, Daniel Schwager wrote: > Hi, > > i would like to resize an existing volume. Is this possible ? > i can't find any relating zfs-command for this task. > > [EMAIL PROTECTED] ~]$ zfs list > NAME USED AVAIL REFER MOUNTPOINT > pool1 35.2G 72.1G18K /pool1 > pool1/solaris-b90-t1.img 9.89G 72.1G 8.79G - > > > This message posted from opensolaris.org > ___ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss You must set the volsize property. man zfs(1M) Gary ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] ZFS very slow under xVM
Hmm, I just repeated this test on my system: bash-3.2# uname -a SunOS soe-x4200m2-6 5.11 onnv-gate:2007-11-02 i86pc i386 i86xpv bash-3.2# prtconf | more System Configuration: Sun Microsystems i86pc Memory size: 7945 Megabytes bash-3.2# prtdiag | more System Configuration: Sun Microsystems Sun Fire X4200 M2 BIOS Configuration: American Megatrends Inc. 080012 02/02/2007 BMC Configuration: IPMI 1.5 (KCS: Keyboard Controller Style) bash-3.2# ptime dd if=/dev/zero of=/xen/myfile bs=16k count=15 15+0 records in 15+0 records out real 31.927 user0.689 sys15.750 bash-3.2# zpool iostat 1 capacity operationsbandwidth pool used avail read write read write -- - - - - - - xen 15.3G 121G 0261 0 32.7M xen 15.3G 121G 0350 0 43.8M xen 15.3G 121G 0392 0 48.9M xen 15.3G 121G 0631 0 79.0M xen 15.5G 121G 0532 0 60.1M xen 15.6G 120G 0570 0 65.1M xen 15.6G 120G 0645 0 80.7M xen 15.6G 120G 0516 0 63.6M xen 15.7G 120G 0403 0 39.9M xen 15.7G 120G 0585 0 73.1M xen 15.7G 120G 0573 0 71.7M xen 15.7G 120G 0579 0 72.4M xen 15.7G 120G 0583 0 72.9M xen 15.7G 120G 0568 0 71.1M xen 16.1G 120G 0400 0 39.0M xen 16.1G 120G 0584 0 73.0M xen 16.1G 120G 0568 0 71.0M xen 16.1G 120G 0585 0 73.1M xen 16.1G 120G 0583 0 72.8M xen 16.1G 120G 0665 0 83.2M xen 16.1G 120G 0643 0 80.4M xen 16.1G 120G 0603 0 75.0M xen 16.1G 120G 5526 320K 64.9M xen 16.7G 119G 0582 0 68.0M xen 16.7G 119G 0639 0 78.5M xen 16.7G 119G 0641 0 80.2M xen 16.7G 119G 0664 0 83.0M xen 16.7G 119G 0629 0 78.5M xen 16.7G 119G 0654 0 81.7M xen 17.2G 119G 0563 63.4K 63.5M xen 17.3G 119G 0525 0 59.2M xen 17.3G 119G 0619 0 71.4M xen 17.4G 119G 0 7 0 448K xen 17.4G 119G 0 0 0 0 xen 17.4G 119G 0408 0 51.1M xen 17.4G 119G 0618 0 76.5M xen 17.6G 118G 0264 0 27.4M xen 17.6G 118G 0 0 0 0 xen 17.6G 118G 0 0 0 0 xen 17.6G 118G 0 0 0 0 ... I don't seem to be experiencing the same result as yourself. The behaviour of ZFS might vary between invocations, but I don't think that is related to xVM. Can you get the results to vary when just booting under "bare metal"? Gary On Fri, Nov 02, 2007 at 10:46:56AM -0700, Martin wrote: > I've removed half the memory, leaving 4Gb, and rebooted into "Solaris xVM", > and re-tried under Dom0. Sadly, I still get a similar problem. With "dd > if=/dev/zero of=myfile bs=16k count=15" I get command returning in 15 > seconds, and "zpool iostat 1 1000" shows 22 records with an IO rate of around > 80M, then 209 records of 2.5M (pretty consistent), then the final 11 records > climbing to 2.82, 3.29, 3.05, 3.32, 3.17, 3.20, 3.33, 4.41, 5.44, 8.11 > > regards > > Martin > > > This message posted from opensolaris.org > ___ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss -- Gary Pennington Solaris Core OS Sun Microsystems [EMAIL PROTECTED] ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
