NoSQL database with high read performances (write accesses are not significant)?

I'm working on a "real-time" website using Nodejs. Currently, I'm using Redis because I need high performance for read-access. The write accesses are not really significant for my use case.

In addition, Redis does not have a query language for the search. So, I create my indexes manually and I use some unions/intersections/... to find some values.

I think that it will be easier to use MongoDB with a embedded finding system and a ORM-like (Mongoose for example). The problem is that I'm not sure that MongoDB is the best choice for my usecase.

What is your advices about the NoSQL DB that I need ? Redis ? CouchDB ? MongoDB开发者_StackOverflow ? Cassandra ? etc.

I repeat: I want to have a real good performance for the read accesses and for the searches (the write accesses are not significant), the simplest possible (orm-like ? finding system ? etc.)

Thanks.

I believe that redis would be the better solution for the following reasons.

1. You require fast read access and redis provides the fastest solution since the keys are in memory, if not most.

2. Although mongodb is easier to query in the general case, your problem domain is narrow and once you decide how you would like to query the data, you can put the correct data structures and indexes in place.

I would say that Redis is a good fit for your DB, and you should look at something like Solr or elasticsearch to provide your searching.

CouchDB will do better in write heavy environment. I don't use it though. MongoDB will do better on read heavy environment.

For search and indexing: MongoDB would require separate index for each of your search criteria for better performance (at least this is what I remember).

Proper index is important in MongoDB. And no joins!!

Here are some links you might go through:

http://www.mongodb.org/display/DOCS/Comparing+Mongo+DB+and+Couch+DB

http://www.snailinaturtleneck.com/blog/2009/06/29/couchdb-vs-mongodb-benchmark/

http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-vs-redis

Hope these will help you find the right db

Goodluck