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-rw-r--r--nova/virt/libvirt/volume/smbfs.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/nova/virt/libvirt/volume/smbfs.py b/nova/virt/libvirt/volume/smbfs.py
index 02534be0d0..d112af750c 100644
--- a/nova/virt/libvirt/volume/smbfs.py
+++ b/nova/virt/libvirt/volume/smbfs.py
@@ -34,7 +34,7 @@ class LibvirtSMBFSVolumeDriver(fs.LibvirtBaseFileSystemVolumeDriver):
self).get_config(connection_info, disk_info)
conf.source_type = 'file'
- conf.driver_cache = 'writethrough'
+ conf.driver_cache = 'writeback'
conf.source_path = connection_info['data']['device_path']
conf.driver_format = connection_info['data'].get('format', 'raw')
return conf