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Comment by martin1985 | Hacker News Reader

martin1985

What is the best alternative for redis?

Depends on the use case, but basically, there is a big set of problems you can solve with different technologies depending on your exact details, one will be better in one way, one will be better in some other way. The sensibility of the programmer is to pick the right one, in an effort to maximize the different aspects: data model fitness for the problem at hand, operational aspects, consistency guarantees, performances (number of nodes needed), scalability, simplicity (do I need support since it's a complex stuff?), and so forth.

That would depend pretty strongly on what about redis isn't working for you.

http://memcached.org/ used to be. I haven't done system architecture in about 2 years but when we were looking at in memory databases, it came down to Redis or Memcache.

Depending on what you need your database for, there are some that perform better than others. You can check this site for comparisons: http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-vs-redis

Memcached is just a stupid key-value store, and by stupid I mean it just stores and retrieves values. It's extremely primitive compared to Redis.

It's not even close to the same thing as Redis except superficially.

The key/value part of Redis is just the beginning. The values themselves can be of several different types that allow for a lot more flexibility in how you store and query data.

Redis is normally not in memory. Everything is written to disk and survives a power failure.

Memcached is just a cache. Don't store anything there you can't lose.

Not sure that's quite right. From the docs:

>In order to achieve its outstanding performance, Redis works with an in-memory dataset. Depending on your use case, you can persist it either by dumping the dataset to disk every once in a while, or by appending each command to a log.

Well, it's written to disk either way. You're right that if you do the "once in a while" setup, you can lose some data in a power failure.

At a previous job people started using Redis thinking it was a fast in-memory data store. It turned out we had accumulated tens of thousands of records.

I haven't measured, but I doubt it's much faster than Postgres. It does have other nice features. I like using the expiring records for caching.

There isn't really one. Memcached fulfills a subset of its simplest use cases.

Hey, I also think you have to try http://tarantool.org if you wish to use persistent and an application server.

Are Oracle Coherence and Infinispan considered alternatives to redis? Don't know much about any of these besides their names to be honest.

I think yes. Take a look at Apache Ignite Data Grid as well.

Look at HyperDex http://hyperdex.org/

Last time I looked into HyperDex it requires proprietary extensions to get access to all of its features.

That would be Warp[0], which adds ACID transactions across multiple keys.

[0] http://hyperdex.org/solutions/

One alternative is to use the database you're already using (like Postgres) until you actually need Redis.

What do you want to do ?

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