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  • 如何看待Redis5. 0的新特性stream？ - 知乎
    Redis5 0最近被作者突然放出来了，增加了很多新的特色功能。而Redis5 0最大的新特性就是多出了一个数据结构Stream，它是一个新的强大的支持多播的可持久化的消息队列，作者坦言Redis Stream狠狠地借鉴了Kafka的设计。
  • database - What are the main differences between Redis Valkey Pub Sub . . .
    In Redis Valkey Streams, stream is a data type, a data structure on its own right Messages or entries are stored in memory and stay there until commanded to be deleted Sync Async communication (Push Pull) Pub Sub is synchronous communication (push protocol) All parties need to be active at the same time to be able to communicate
  • Redis - Python example of xadd and xread - Stack Overflow
    redis xadd(stream_name, {key: value}) Block to read: redis xread({stream_name: '$'}, None, 0) stream_name and ID should be a dictionary $ means the most new message Moreover, instead of passing a normal ID for the stream mystream I passed the special ID $
  • Redis streams - remove expire events based on time
    Can stream be configured to retain the last N events ? If you want to always keep the latest N events, you can call XADD command with MAXLEN option to get a capped stream Also with ~ option, you can have better performance, but inaccurately expire events Check the doc for detail UPDATE Since Redis 6 2, XTRIM supports a new trimming strategy
  • redis - JedisConnectionException: Unexpected end of stream error . . .
    In my case, I have a local Redis Server 6 and Jedis connects using host=localhost or host=127 0 0 1 but when I try to do a jedis connection ping it throws the JedisConnectionException If you have the same behavior, check that your redis server is working Connect with a redis-cli and execute a ping using same host and port that you have in jedis
  • redis - How do you get a list of streams? - Stack Overflow
    You can avoid using a prefix by using namespacing capability provided by redis You can assign a 'database' (0-15 by default) for streams names Say you use database 5 for streams, then scan command in database 5 should return the keys in it only redis io commands select
  • Redis作消息队列的消息可靠性如何保证？ - 知乎
    所以，Redis 的 Stream 提供了可以指定队列最大长度的功能，就是为了避免这种情况发生。 但 Kafka、RabbitMQ 这类消息队列就不一样了，它们的数据都会存储在磁盘上，磁盘的成本要比内存小得多，当消息积压时，无非就是多占用一些磁盘空间，相比于内存，在面对积压时也会更加「坦然」。
  • Redis Stream - Order Guarantee of the events - Stack Overflow
    So basically Kafka partitions are more similar to using N different Redis keys While Redis consumer groups are a server-side load balancing system of messages from a given stream to N different consumers So, the Consumer Groups feature in Redis does not serve to the same purpose of Kafka's
  • How to define TTL for redis streams? - Stack Overflow
    So I would say use Redis set or Redis map to track the acknowledge stream ids and run a periodic sweep job to clean up the stream For example Service A sends a stream item with ID1 to service B Service B acknowledges the stream item after consuming the items in the map ack_stream = { ID1: true }, you can track other data e g count in case of
  • Redis streams limitations - Stack Overflow
    There are only two "restrictions" with regards to any data structure in Redis, Stream included: The data is ultimately capped by the amount of RAM you've provisioned for your database The maximum number of keys in the database is 2^32 I don't foresee problems by having Redis manage 200K Streams





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