于 2014/3/6 8:46, Royce Lv 写道:
On 2014年03月05日 23:51, Paulo Vital wrote:
When executing a virsh live migration of a VM created by Kimchi, the migration stops due to miss configuration "cache=none" on disk's performance parameters. I'm little worried about make cache 'none' will cause performance downgrade for guest in daily running. Can we allow update this parameter in vm disk edit and change it when we decide to live migrate a vm?
Agree. I can imagine the bad performance with disk's cache off. Can we re-enable it after the VM migrated?
Signed-off-by: Paulo Vital <pvital@linux.vnet.ibm.com> --- src/kimchi/vmtemplate.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/kimchi/vmtemplate.py b/src/kimchi/vmtemplate.py index e2d78a4..89b5e72 100644 --- a/src/kimchi/vmtemplate.py +++ b/src/kimchi/vmtemplate.py @@ -152,7 +152,7 @@ class VMTemplate(object): params = {'src': src, 'dev': dev, 'bus': self.info['disk_bus']} ret += """ <disk type='file' device='disk'> - <driver name='qemu' type='qcow2'/> + <driver name='qemu' type='qcow2' cache='none'/> <source file='%(src)s' /> <target dev='%(dev)s' bus='%(bus)s' /> </disk> @@ -182,7 +182,7 @@ class VMTemplate(object): # Passthrough configuration disk_xml = """ <disk type='volume' device='lun'> - <driver name='qemu' type='raw'/> + <driver name='qemu' type='raw' cache='none'/> <source dev='%(src)s'/> <target dev='%(dev)s' bus='scsi'/> </disk>"""
_______________________________________________ Kimchi-devel mailing list Kimchi-devel@ovirt.org http://lists.ovirt.org/mailman/listinfo/kimchi-devel