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What is RedisGears?

RedisGears is an engine for data processing in Redis. RedisGears supports transaction, batch , and event-driven processing of Redis data. To use RedisGears, you write functions that describe how your data should be processed. You then submit this code to your Redis deployment for remote execution.

As of v1.0.0, code for RedisGears must be written in Python. However, an internal C API exists and can be used by other Redis modules. In addition, support for other languages is being planned.

To take a simple example, you can use RedisGears to count the words in Redis:

gb = GearsBuilder()
gb.map(lambda x: x['value'])     # map records to "sentence" values
gb.flatmap(lambda x: x.split())  # split sentences to words
gb.countby()                     # count each word's occurances
gb.run()

In broad strokes, the following diagram depicts RedisGears' components:

    +---------------------------------------------------------------------+
    | Redis Server               +--------------------------------------+ |
    |                            | RedisGears Module                    | |
    | +----------------+         |                                      | |
    | | Data           | Input   | +------------+ +-------------------+ | |
    | |                +-------->+ | Function   | | APIs              | | |
    | | Key1 : Value1  |         | | +--------+ | | C, Python, ...    | | |
    | | Key2 : Value2  | Output  | | | Reader | | +-------------------+ | |
    | | Key3 : Value3  <---------+ | +---+----+ | +-------------------+ | |
    | |      ...       |         | |     v      | | Redis commands    | | |
    | +----------------+         | | +---+----+ | | Gears admin & ops | | |
    |                            | | | Step 1 | | +-------------------+ | |
    |                            | | +---+----+ | +-------------------+ | |
    | +----------------+         | |     v      | | Coordinator       | | |
    | | Events         |         | | +---+----+ | | Cluster MapReduce | | |
    | |                | Trigger | | | Step 2 | | +-------------------+ | |
    | | Data update    +-------->+ | +---+----+ | +-------------------+ | |
    | | Stream message |         | |     v      | | Engine            | | |
    | | Time interval  |         | |    ...     | | Runtime execution | | |
    | |      ...       |         | +------------+ +-------------------+ | |
    | +----------------+         +--------------------------------------+ |
    +---------------------------------------------------------------------+

Where Next?

Contact Us

If you have questions or feedback, or want to report an issue or contribute some code , here's where you can get in touch:

License

RedisGears is licensed under the Redis Source Available License Agreement .