811f496acd
This patch adds support for oversubscription in thin provisioning in Manila. This is similar to the same feature in Cinder. Change-Id: I3e45ad23a83591bf16adff7f21c3ce19325e7e91 implements: blueprint oversubscription-in-thin-provisioning
174 lines
7.0 KiB
Python
174 lines
7.0 KiB
Python
# Copyright 2011-2012 OpenStack LLC.
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
"""
|
|
Tests For Capacity Weigher.
|
|
"""
|
|
|
|
import mock
|
|
from oslo_config import cfg
|
|
|
|
from manila import context
|
|
from manila.openstack.common.scheduler import weights
|
|
from manila.scheduler.weights import capacity
|
|
from manila.share import utils
|
|
from manila import test
|
|
from manila.tests.scheduler import fakes
|
|
|
|
CONF = cfg.CONF
|
|
|
|
|
|
class CapacityWeigherTestCase(test.TestCase):
|
|
def setUp(self):
|
|
super(CapacityWeigherTestCase, self).setUp()
|
|
self.host_manager = fakes.FakeHostManager()
|
|
self.weight_handler = weights.HostWeightHandler(
|
|
'manila.scheduler.weights')
|
|
|
|
def _get_weighed_host(self, hosts, weight_properties=None):
|
|
if weight_properties is None:
|
|
weight_properties = {'size': 1}
|
|
return self.weight_handler.get_weighed_objects(
|
|
[capacity.CapacityWeigher],
|
|
hosts,
|
|
weight_properties)[0]
|
|
|
|
@mock.patch('manila.db.sqlalchemy.api.service_get_all_by_topic')
|
|
def _get_all_hosts(self, _mock_service_get_all_by_topic, disabled=False):
|
|
ctxt = context.get_admin_context()
|
|
fakes.mock_host_manager_db_calls(_mock_service_get_all_by_topic,
|
|
disabled=disabled)
|
|
host_states = self.host_manager.get_all_host_states_share(ctxt)
|
|
_mock_service_get_all_by_topic.assert_called_once_with(
|
|
ctxt, CONF.share_topic)
|
|
return host_states
|
|
|
|
# NOTE(xyang): If thin_provisioning_support = True and
|
|
# max_over_subscription_ratio >= 1, use the following formula:
|
|
# free = math.floor(total * host_state.max_over_subscription_ratio
|
|
# - host_state.provisioned_capacity_gb
|
|
# - total * reserved)
|
|
# Otherwise, use the following formula:
|
|
# free = math.floor(free_space - total * reserved)
|
|
def test_default_of_spreading_first(self):
|
|
hostinfo_list = self._get_all_hosts()
|
|
|
|
# host1: thin_provisioning_support = False
|
|
# free_capacity_gb = 1024
|
|
# free = math.floor(1024 - 1024 * 0.1) = 921.0
|
|
# weight = 0.40
|
|
# host2: thin_provisioning_support = True
|
|
# max_over_subscription_ratio = 2.0
|
|
# free_capacity_gb = 300
|
|
# free = math.floor(2048 * 2.0 - 1748 - 2048 * 0.1)=2143.0
|
|
# weight = 1.0
|
|
# host3: thin_provisioning_support = False
|
|
# free_capacity_gb = 512
|
|
# free = math.floor(256 - 512 * 0)=256.0
|
|
# weight = 0.08
|
|
# host4: thin_provisioning_support = True
|
|
# max_over_subscription_ratio = 1.0
|
|
# free_capacity_gb = 200
|
|
# free = math.floor(2048 * 1.0 - 1848 - 2048 * 0.05) = 97.0
|
|
# weight = 0.0
|
|
# host5: thin_provisioning_support = True
|
|
# max_over_subscription_ratio = 1.5
|
|
# free_capacity_gb = 500
|
|
# free = math.floor(2048 * 1.5 - 1548 - 2048 * 0.05) = 1421.0
|
|
# weight = 0.65
|
|
|
|
# so, host2 should win:
|
|
weighed_host = self._get_weighed_host(hostinfo_list)
|
|
self.assertEqual(1.0, weighed_host.weight)
|
|
self.assertEqual(
|
|
'host2', utils.extract_host(weighed_host.obj.host))
|
|
|
|
def test_capacity_weight_multiplier_negative_1(self):
|
|
self.flags(capacity_weight_multiplier=-1.0)
|
|
hostinfo_list = self._get_all_hosts()
|
|
|
|
# host1: thin_provisioning_support = False
|
|
# free_capacity_gb = 1024
|
|
# free = math.floor(1024 - 1024 * 0.1) = 921.0
|
|
# free * (-1) = -921.0
|
|
# weight = -0.40
|
|
# host2: thin_provisioning_support = True
|
|
# max_over_subscription_ratio = 2.0
|
|
# free_capacity_gb = 300
|
|
# free = math.floor(2048 * 2.0-1748-2048 * 0.1) = 2143.0
|
|
# free * (-1) = -2143.0
|
|
# weight = -1.0
|
|
# host3: thin_provisioning_support = False
|
|
# free_capacity_gb = 512
|
|
# free = math.floor(256 - 512 * 0) = 256.0
|
|
# free * (-1) = -256.0
|
|
# weight = -0.08
|
|
# host4: thin_provisioning_support = True
|
|
# max_over_subscription_ratio = 1.0
|
|
# free_capacity_gb = 200
|
|
# free = math.floor(2048 * 1.0 - 1848 - 2048 * 0.05) = 97.0
|
|
# free * (-1) = -97.0
|
|
# weight = 0.0
|
|
# host5: thin_provisioning_support = True
|
|
# max_over_subscription_ratio = 1.5
|
|
# free_capacity_gb = 500
|
|
# free = math.floor(2048 * 1.5 - 1548 - 2048 * 0.05) = 1421.0
|
|
# free * (-1) = -1421.0
|
|
# weight = -0.65
|
|
|
|
# so, host4 should win:
|
|
weighed_host = self._get_weighed_host(hostinfo_list)
|
|
self.assertEqual(0.0, weighed_host.weight)
|
|
self.assertEqual(
|
|
'host4', utils.extract_host(weighed_host.obj.host))
|
|
|
|
def test_capacity_weight_multiplier_2(self):
|
|
self.flags(capacity_weight_multiplier=2.0)
|
|
hostinfo_list = self._get_all_hosts()
|
|
|
|
# host1: thin_provisioning_support = False
|
|
# free_capacity_gb = 1024
|
|
# free = math.floor(1024-1024*0.1) = 921.0
|
|
# free * 2 = 1842.0
|
|
# weight = 0.81
|
|
# host2: thin_provisioning_support = True
|
|
# max_over_subscription_ratio = 2.0
|
|
# free_capacity_gb = 300
|
|
# free = math.floor(2048 * 2.0 - 1748 - 2048 * 0.1) = 2143.0
|
|
# free * 2 = 4286.0
|
|
# weight = 2.0
|
|
# host3: thin_provisioning_support = False
|
|
# free_capacity_gb = 512
|
|
# free = math.floor(256 - 512 * 0) = 256.0
|
|
# free * 2 = 512.0
|
|
# weight = 0.16
|
|
# host4: thin_provisioning_support = True
|
|
# max_over_subscription_ratio = 1.0
|
|
# free_capacity_gb = 200
|
|
# free = math.floor(2048 * 1.0 - 1848 - 2048 * 0.05) = 97.0
|
|
# free * 2 = 194.0
|
|
# weight = 0.0
|
|
# host5: thin_provisioning_support = True
|
|
# max_over_subscription_ratio = 1.5
|
|
# free_capacity_gb = 500
|
|
# free = math.floor(2048 * 1.5 - 1548 - 2048 * 0.05) = 1421.0
|
|
# free * 2 = 2842.0
|
|
# weight = 1.29
|
|
|
|
# so, host2 should win:
|
|
weighed_host = self._get_weighed_host(hostinfo_list)
|
|
self.assertEqual(2.0, weighed_host.weight)
|
|
self.assertEqual(
|
|
'host2', utils.extract_host(weighed_host.obj.host))
|