57 lines
2.2 KiB
Python
57 lines
2.2 KiB
Python
# Copyright (c) 2013 Rackspace Hosting, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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#
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""MongoDB storage driver configuration options."""
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from oslo.config import cfg
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MONGODB_OPTIONS = [
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cfg.StrOpt('uri', help='Mongodb Connection URI'),
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# Database name
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# TODO(kgriffs): Consider local sharding across DBs to mitigate
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# per-DB locking latency.
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cfg.StrOpt('database', default='marconi', help='Database name'),
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cfg.IntOpt('partitions', default=2,
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help=('Number of databases across which to '
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'partition message data, in order to '
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'reduce writer lock %. DO NOT change '
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'this setting after initial deployment. '
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'It MUST remain static. Also, you '
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'should not need a large number of partitions '
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'to improve performance, esp. if deploying '
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'MongoDB on SSD storage.')),
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cfg.IntOpt('max_attempts', default=1000,
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help=('Maximum number of times to retry a failed operation.'
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'Currently only used for retrying a message post.')),
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cfg.FloatOpt('max_retry_sleep', default=0.1,
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help=('Maximum sleep interval between retries '
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'(actual sleep time increases linearly '
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'according to number of attempts performed).')),
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cfg.FloatOpt('max_retry_jitter', default=0.005,
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help=('Maximum jitter interval, to be added to the '
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'sleep interval, in order to decrease probability '
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'that parallel requests will retry at the '
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'same instant.')),
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]
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MONGODB_GROUP = 'drivers:storage:mongodb'
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