diff options
| author | Kashyap Chamarthy <kchamart@redhat.com> | 2019-03-14 14:28:12 +0100 |
|---|---|---|
| committer | Kashyap Chamarthy <kchamart@redhat.com> | 2019-03-21 14:17:22 +0100 |
| commit | 44edfa045c69b18b0a991475cb9c1d87b5941d52 (patch) | |
| tree | a34af19d6bd2eb04d9a00bf6d6fefeb57de0d402 /nova | |
| parent | b9dc86d8d646472195070022ff7ae4c372bef4ca (diff) | |
| download | nova-44edfa045c69b18b0a991475cb9c1d87b5941d52.tar.gz | |
libvirt: vzstorage: Use 'writeback' QEMU cache mode
The 'writethrough' cache mode is terribly slow. Use the saner
alternative, "writeback" cache mode.
See further details in the documentation of change Ibe236988af2
("libvirt: Use 'writeback' QEMU cache mode when 'none' is not viable).
Related-Bug: #1818847
Change-Id: I5aae681bc8e8feb7703a89f91b942360dd69c35d
Signed-off-by: Kashyap Chamarthy <kchamart@redhat.com>
Diffstat (limited to 'nova')
| -rw-r--r-- | nova/tests/unit/virt/libvirt/volume/test_vzstorage.py | 2 | ||||
| -rw-r--r-- | nova/virt/libvirt/volume/vzstorage.py | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/nova/tests/unit/virt/libvirt/volume/test_vzstorage.py b/nova/tests/unit/virt/libvirt/volume/test_vzstorage.py index ec0596d7a4..822ba08d6b 100644 --- a/nova/tests/unit/virt/libvirt/volume/test_vzstorage.py +++ b/nova/tests/unit/virt/libvirt/volume/test_vzstorage.py @@ -110,4 +110,4 @@ class LibvirtVZStorageTestCase(test_volume.LibvirtVolumeBaseTestCase): self.assertEqual('file', conf.source_type) self.assertEqual(file_path, conf.source_path) self.assertEqual('raw', conf.driver_format) - self.assertEqual('writethrough', conf.driver_cache) + self.assertEqual('writeback', conf.driver_cache) diff --git a/nova/virt/libvirt/volume/vzstorage.py b/nova/virt/libvirt/volume/vzstorage.py index d8b971e954..85ffb45076 100644 --- a/nova/virt/libvirt/volume/vzstorage.py +++ b/nova/virt/libvirt/volume/vzstorage.py @@ -71,7 +71,7 @@ class LibvirtVZStorageVolumeDriver(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 |