How are messages stored in brokers in redis-smq?

weyoss / redis-smq

A simple high-performance Redis message queue for Node.js.

MIT License

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How are messages stored in brokers in redis-smq? #89

Closed longtt2705 closed 2 years ago

longtt2705 commented 2 years ago

In some other queue like Kafka, which is designed using disk-based retention, this means when a broker downs and then backs, the messages in queue can be recovered. But what happen in redis-smq, Redis relies on main memory of computer for data storage. Does it mean all the messages in the queue will be lost if a broker down? This is the thing that I concern to choose between redis-smq and others. Can you help me answer it @weyoss ?

weyoss commented 2 years ago

@longtt2705 RedisSMQ is backed by Redis.

Depending on your application needs and requirements, Redis can be configured:

To have no data persistence at all. When your Redis server shuts down, you lost your data.
To partially persist your data. Data is persisted into disk at specified intervals.
To have full data persistence "comparable to what PostgreSQL can provide you" quote. Every write operation is persisted.

For more details see https://redis.io/docs/manual/persistence