Bug 844627
| Summary: | copy cluster-sized blocks to the target of live storage migration | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Paolo Bonzini <pbonzini> |
| Component: | qemu-kvm | Assignee: | Paolo Bonzini <pbonzini> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | urgent | Docs Contact: | |
| Priority: | urgent | ||
| Version: | 6.3 | CC: | abaron, acathrow, bsarathy, chetan, cpelland, dallan, dyasny, iheim, juzhang, mkenneth, pbonzini, qzhang, shuang, shu, tburke, virt-maint, wdai |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | storage | ||
| Fixed In Version: | qemu-kvm-0.12.1.2-2.326.el6 | Doc Type: | Bug Fix |
| Doc Text: |
The allocation granularity in a mirroring target was independent of its cluster size, so the target was always bigger than the source. Now, cluster-sized blocks are copied to the target, so the mirroring target and source sizes are identical.
|
Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2013-02-21 13:07:50 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 814102, 861905, 864962 | ||
| Bug Blocks: | 804161, 852458, 858775 | ||
|
Description
Paolo Bonzini
2012-07-31 08:55:44 UTC
*** Bug 848665 has been marked as a duplicate of this bug. *** I talked to Eric Blake, and his changes for bug 856247 cover the libvirt side. Reproduced on qemu-kvm-0.12.1.2-2.295.el6_3.2.
Steps
1. boot guest
#/usr/libexec/qemu-kvm -m 8G -smp 8,cores=8,sockets=1,threads=1 -cpu SandyBridge -drive file=/root/RHEL-Server-6.4-64-virtio.qcow2,format=qcow2,if=none,id=drive-virtio-disk0,cache=none,werror=stop,rerror=stop -device virtio-blk-pci,drive=drive-virtio-disk0,id=virtio-blk-pci0,bootindex=1 -netdev tap,sndbuf=0,id=hostnet0,script=/etc/qemu-ifup,downscript=no,vhost=on -device virtio-net-pci,netdev=hostnet0,mac=00:10:1a:61:72:01,bus=pci.0,addr=0x4,id=virtio-net-pci0 -uuid 7678e130-f1a7-4157-875a-8defcdb27af7 -rtc base=localtime,clock=host,driftfix=slew -vnc :1 -M rhel6.3.0 -monitor stdio -qmp tcp:0:4444,server,nowait
2. Do live snap shot
{ "execute": "transaction", "arguments": {'actions': [ { 'type': 'blockdev-snapshot-sync', 'data' : { 'device': 'drive-virtio-disk0', 'snapshot-file': '/root/blockcopy/sn1' } }] } }
3. do mirror
{ "execute" : "__com.redhat_drive-mirror", "arguments" : { "device" : "drive-virtio-disk0", "target" : "/root/blockcopy/sn2", "format": "qcow2", "mode": "absolute-paths"} }
4. shut down guest
Results:
sn2(mirroring target) > sn1(mirroring source)
#ls -sh
16M sn1 81M sn2
Verify on qemu-kvm-rhev-0.12.1.2-2.295.el6_3.4.x86_64.
Steps
1. boot guest
#/usr/libexec/qemu-kvm -m 8G -smp 8,cores=8,sockets=1,threads=1 -cpu SandyBridge -drive file=/root/RHEL-Server-6.4-64-virtio.qcow2,format=qcow2,if=none,id=drive-virtio-disk0,cache=none,werror=stop,rerror=stop -device virtio-blk-pci,drive=drive-virtio-disk0,id=virtio-blk-pci0,bootindex=1 -netdev tap,sndbuf=0,id=hostnet0,script=/etc/qemu-ifup,downscript=no,vhost=on -device virtio-net-pci,netdev=hostnet0,mac=00:10:1a:61:72:01,bus=pci.0,addr=0x4,id=virtio-net-pci0 -uuid 7678e130-f1a7-4157-875a-8defcdb27af7 -rtc base=localtime,clock=host,driftfix=slew -vnc :1 -M rhel6.3.0 -monitor stdio -qmp tcp:0:4444,server,nowait
2. Do live snap shot
{ "execute": "transaction", "arguments": {'actions': [ { 'type': 'blockdev-snapshot-sync', 'data' : { 'device': 'drive-virtio-disk0', 'snapshot-file': '/root/blockcopy/sn3' } }] } }
3. do mirror
{ "execute" : "__com.redhat_drive-mirror", "arguments" : { "device" : "drive-virtio-disk0", "target" : "/root/blockcopy/sn4", "format": "qcow2", "mode": "absolute-paths"} }
4. shut down guest
Results:
sn2(mirroring target) = sn1(mirroring source)
#ls -sh
9.9M sn3 9.9M sn4
Please ignore the comment10, the comment10 is intended to verify rhel6.3.z(Bug 852458 - copy cluster-sized blocks to the target of live storage migration ) bug. Reproduced on qemu-kvm-rhev-0.12.1.2-2.295.el6.x86_64 and verified pass on qemu-kvm-rhev-0.12.1.2-2.334.el6.x86_64. Steps: 1. Boot a guest # /usr/libexec/qemu-kvm -M rhel6.3.0 -cpu SandyBridge -enable-kvm -m 2048 -smp 2,sockets=2,cores=1,threads=1 -enable-kvm -name rhel6.3 -uuid b7eaee47-7a28-4551-9ec5-09c0569f788b -k en-us -rtc base=localtime,clock=host,driftfix=slew -no-kvm-pit-reinjection -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device usb-tablet,id=input0 -drive file=/home/rhel6.3-virtio.qcow2,if=none,id=disk0,format=qcow2,werror=stop,rerror=stop,aio=native -device virtio-blk-pci,id=bus1,drive=disk0,bus=pci.0,addr=0x3 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device virtio-scsi-pci,id=bus2,bus=pci.0,addr=0x4 -device scsi-cd,bus=bus2.0,drive=drive-ide0-1-0,id=virtio-scsi-pci1 -netdev tap,id=hostnet0,vhost=on -device virtio-net-pci,netdev=hostnet0,id=net0,mac=00:1A:2A:4A:25:85,bus=pci.0,addr=0x5 -monitor stdio -qmp tcp:0:6666,server,nowait -chardev socket,path=/tmp/isa-serial,server,nowait,id=isa1 -device isa-serial,chardev=isa1,id=isa-serial1 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x8 -chardev socket,id=charchannel0,path=/tmp/serial-socket,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.rhevm.vdsm -chardev socket,path=/tmp/foo,server,nowait,id=foo -device virtconsole,chardev=foo,id=console0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x9 -vnc :10 -k en-us -boot c 2. Create snapshot sn1 blockdev-snapshot-sync disk0 /home/sn1 (qemu) info block disk0: removable=0 io-status=ok file=/home/sn1 backing_file=/home/rhel6.3-virtio.qcow2 ro=0 drv=qcow2 encrypted=0 3. Mirroring sn1 to mirror.qcow2 file (qemu) __com.redhat_drive-mirror disk0 /home/mirror.qcow2 qcow2 4. Shutdown guest after mirroring finished. 5. Check the 'sn1' and 'mirror.qcow2' file. ======================== On the old version qemu-kvm-rhev-0.12.1.2-2.295.el6.x86_64: ]# ls -lrth sn1 mirror.qcow2 -rw-r--r--. 1 root root 11M Nov 8 13:19 sn1 -rw-r--r--. 1 root root 55M Nov 8 13:19 mirror.qcow2 On the fixed version qemu-kvm-rhev-0.12.1.2-2.334.el6.x86_64: # ls -lrth sn1 mirror.qcow2 -rw-r--r--. 1 root root 8.9M Nov 8 13:21 sn1 -rw-r--r--. 1 root root 8.9M Nov 8 13:21 mirror.qcow2 Based on above, this issue is fixed. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2013-0543.html |