What is Redis pubsub and how do I use it? - Stack Overflow
WEBJun 26, 2011 · Now, open another redis-cli (or for more fun times have a friend open up their redis-cli and connect to your server) and SUBSCRIBE to the channel: redis 127.0.0.1:6379> SUBSCRIBE myradioshow Reading messages... (press Ctrl-C to quit) 1) "subscribe" 2) "myradioshow" 3) (integer) 1 Go back to your original redis-cli and …
Redis publish/subscribe: see what channels are currently …
WEBJun 8, 2012 · 3. There is currently no command for showing what channels "exist" by way of being subscribed to, but there is and "approved" issue and a pull request that implements this. Due to the nature of this call, it is not something that can scale, and is thus a "DEBUG" command. There are a few other ways to solve your problem, however.
Redis publish-subscribe: Is Redis guaranteed to deliver the …
WEBMay 15, 2014 · Redis does not provide guaranteed delivery using its Pub/Sub mechanism. Moreover, if a subscriber is not actively listening on a channel, it will not receive messages that would have been published. I previously wrote a detailed article that describes how one can use Redis lists in combination with BLPOP to implement reliable multicast pub/sub ...
Is non-blocking Redis pubsub possible? - Stack Overflow
WEBOct 24, 2011 · Accepted answer is obsolete as redis-py recommends you to use the non-blocking get_message().But it also provides a way to easily use threads.
database - What are the main differences between Redis/Valkey …
WEBDec 31, 2019 · It does expire after 7 days, good for high-volume communication layer. 2.Google Pub/Sub is At-least-once and has the SLA to ensure that. 3. Google Pub/Sub also has filtering so that subscribers don't get everything. Ultimately Redis is more than a communication layer and offers different options based on your needs, where Google …
Redis Pub/Sub with Reliability - Stack Overflow
WEB63. I've been looking at using Redis Pub/Sub as a replacement to RabbitMQ. From my understanding Redis's pub/sub holds a persistent connection to each of the subscribers, and if the connection is terminated, all future messages will be lost and dropped on the floor. One possible solution is to use a list (and blocking wait) to store all the ...
Using Redis as PubSub over Socket.io - Stack Overflow
WEBSep 23, 2015 · Planning to use following technologies for this app:-. NodeJs + Socket.io + Redis + CouchDB (To store message history) + AngularJS. Per my initial research using Redis as a PubSub service is better approach over using Socket.io as pub-sub .Reason of this is if different users are connected to different server instances, then using socket in ...
Redis PUB/SUB and high availability - Stack Overflow
WEBAug 8, 2016 · Doing pub sub in Redis with failover means thinking about additional factors in the client side. A key piece to understand is that subscriptions are per-connection. If you are subscribed to a channel on a node and it fails, you will need to handle reconnect and resubscribe. Because subscriptions are done at the connection level it is not ...
javascript - How to use redis PUBLISH/SUBSCRIBE with nodejs to …
WEBDec 14, 2010 · Complete Redis Pub/Sub Example (Real-time Chat using Hapi.js & Socket.io) We were trying to understand Redis Publish/Subscribe ("Pub/Sub") and all the existing examples were either outdated, too simple or had no tests. So we wrote a Complete Real-time Chat using Hapi.js + Socket.io + Redis Pub/Sub Example with End …
Redis Pub Sub channel memory - Stack Overflow
WEBJun 13, 2014 · 16. Redis does not keep messages in memory in the Pub/Sub context as you can see in the implementation (x): the message is sent to clients listening to matching channels (if any). Then Redis simply returns how many clients have received the message (keeping in mind that a client may receive a single message multiple times e.g if multiple ...