Try to look at KEYS command. KEYS * will list all keys stored in redis. EDIT: please note the warning at the top of KEYS documentation page: Time complexity: O(N) with N being the number of keys in the database, under the assumption that the key names in the database and the given pattern have … Read more
IMPORTANT: always use SCAN instead of (the evil) KEYS Redis’ pattern matching is somewhat functionally limited (see the implementation of stringmatchlen in util.c) and does not provide that which you seek ATM. That said, consider the following possible routes: Extend stringmatchlen to match your requirements, possibly submitting it as a PR. Consider what you’re trying … Read more
Since I haven’t got any good answers, I came up with this solution (BTW thanks @Simon and @Alex for your answers!). I want to share it with all of the community as a reference. Of course, any corrections will be highly appreciated. using System; using System.Net.Sockets; using BookSleeve; namespace Redis { public sealed class RedisConnectionGateway … Read more
Data storage Pub/Sub is a Publisher/Subscriber platform, it’s not data storage. Published messages evaporate, regardless if there was any subscriber. In Redis 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 … Read more
This is not possible, for the sake of keeping Redis simple. Quoth Antirez, creator of Redis: Hi, it is not possible, either use a different top-level key for that specific field, or store along with the filed another field with an expire time, fetch both, and let the application understand if it is still valid … Read more
What are the normal naming convention for keys in redis? I’ve seen values separated by : but I’m not sure what the normal convention is, or why. Yes, colon sign : is a convention when naming keys. In this tutorial on redis website is stated: Try to stick with a schema. For instance “object-type:id:field” can … Read more
Instead, use: sudo service redis-server start I had the same problem, stopping/starting other services from within Ubuntu on WSL. This worked, where systemctl did not. And one could reasonably wonder, “how would you know that the service name was ‘redis-server’?” You can see them using service –status-all
1) What is Express.js? Express.js is a Node.js framework. It’s the most popular framework as of now (the most starred on NPM). . It’s built around configuration and granular simplicity of Connect middleware. Some people compare Express.js to Ruby Sinatra vs. the bulky and opinionated Ruby on Rails. 2) What is the purpose of it … Read more
With Redis, relationships are typically represented by sets. A set can be used to represent a one-way relationship, so you need one set per object to represent a many-to-many relationship. It is pretty useless to try to compare a relational database model to Redis data structures. With Redis, everything is stored in a denormalized way. … Read more
Well this is expected of any efficient data storage: the words have to be indexed in memory in a dynamic data structure of cells linked by pointers. Size of the structure metadata, pointers and memory allocator internal fragmentation is the reason why the data take much more memory than a corresponding flat file. A Redis … Read more