zaqar/marconi/queues/storage/mongodb/options.py

54 lines
1.8 KiB
Python

# Copyright (c) 2013 Rackspace Hosting, Inc.
#
# 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.
"""MongoDB storage driver configuration options."""
from marconi.common import config
# TODO(kgriffs): Expose documentation to oslo.config
OPTIONS = {
# Connection string
'uri': None,
# Database name. Will be postfixed with partition identifiers.
'database': 'marconi',
# Number of databases across which to partition message data,
# in order to reduce writer lock %. DO NOT change this setting
# after initial deployment. It MUST remain static. Also,
# you should not need a large number of partitions to improve
# performance, esp. if deploying MongoDB on SSD storage.
'partitions': 2,
# Maximum number of times to retry a failed operation. Currently
# only used for retrying a message post.
'max_attempts': 1000,
# Maximum sleep interval between retries (actual sleep time
# increases linearly according to number of attempts performed).
'max_retry_sleep': 0.1,
# Maximum jitter interval, to be added to the sleep interval, in
# order to decrease probability that parallel requests will retry
# at the same instant.
'max_retry_jitter': 0.005,
}
CFG = config.namespace('queues:drivers:storage:mongodb').from_options(
**OPTIONS
)