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Comment by michaelangerman | Hacker News Reader

For me, Redis is the most software valuable tool I use. I was hooked from the day I started using it about 8 years ago. It somehow has a place in almost every software project I work on. And it just keeps getting better. Now with RESP3 on the horizon, it will enable me to even further benefit from the many clients available in almost every programming language.

https://news.ycombinator.com/item?id=494649

Here is the link from Feb 25, 2009

Note this number = 494649

Today = 19 247493

Nineteen (19) Million Posts etc later (mas o menos)

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Is it worthwhile to replace a MySQL with Redis? Am I losing something?

I believe if you think of Redis as a data structure server, then there are lots of applications you can build out that have simple commands like set and get for both lists and hashmaps that are slightly different ways of thinking about saving and retrieving your data. The concept of a set is very powerful and easier to implement I believe than using SQL.

Relational databases are based on relational algebra which is all about operating on sets.

https://en.wikipedia.org/wiki/Relational_algebra

Redis is not a drop-in replacement for an SQL server. It's more like a RAM based key value store with better data type options than "just string" and it's also like a swiss army knife. In a generic Rails/Laravel/MVC setup you could use redis to handle one or all of: sessions, cache, queue, pubsub, (probably more), effectively lifting the burden from your SQL server.

Your data, eventually? If that's OK, some of the time, then Redis might be fine and will be much faster (since not losing data involves much more work).

Hello, with Redis I can lose data? It does not create snapshots and has some High Availability configuration easy to setup?

As far as I'm aware any setup of Redis, including Redis cluster uses asynchronous replication, so you will lose some window of data.

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