54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
# 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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# See the License for the specific language governing permissions and
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# limitations under the License.
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r"""
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Zaqar backed by Redis.
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Redis?
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------
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Redis is sometimes called a "data structure store" because it makes common
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data structures like hashes, lists, and sets available in shared, in-memory
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storage. Zaqar chose redis because it has strong consistency and its Lua
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scripting allows for semi-complex transactions to be built atop the primitives
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it provides.
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Supported Features
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------------------
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- FIFO
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- Claims
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- High Throughput[1]_
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- At-least-once Delivery
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.. [1] This depends on the backing Redis store performance. For more
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information, see `Redis' benchmarks <http://redis.io/topics/benchmarks>`_.
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Redis is only a storage driver, and can't be used as the sole backend for a
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Zaqar deployment.
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Unsupported Features
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--------------------
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- Durability[2]_
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.. [2] As an in-memory store, Redis doesn't support the durability guarantees
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the MongoDB or SQLAlchemy backends do.
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Redis is not supported as the backend for the Management Store, which means
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either MongoDB or SQLAlchemy are required in addition to Redis for a working
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deployment.
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"""
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