Redis vs MongoDB

[baris]

Redis stores all data in RAM, MongoDB uses disk.

If you are not worried about running out of ram use Redis as it is faster.

How much faster is Redis than mongoDB?

It's widely mentioned that Redis is "Blazing Fast" and mongoDB is fast too. But, I'm having trouble finding actual numbers comparing the results of the two. Given similar configurations, features and

Stack Overflow (stackoverflow.com)

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

http://en.wikipedia.org/wiki/Redis
http://en.wikipedia.org/wiki/Mongodb

[kamov]

@baris

Many thanks!!

[meetdilip]

So am I to understand that MongoDB is good if we have lesser RAM ?

[a_5mith]

@meetdilip Yes, but page loads will be slower.

[dibu]

@baris What about LevelDB? Which is better for NoddeBB Redis or LevelDB?

[baris]

Redis is better supported than LevelDB right now, some of the LevelDB functionality isn't implemented so I wouldn't use LevelDB yet.

[Ken OKABE]

How much RAM do we need for Redis of nodeBB, say, for instance, a very active forum such as this nodeBB community forum?

[julian]

@Ken-OKABE Keep in mind memory usage goes up the longer the forum is around, since post data is kept in-memory as well.

This forum's been around for about a year -- we're using 40mb.

[Ken OKABE]

@julian said:

we're using 40mb

For this scale and period, the memory size seems very reasonable. Thanks for this great project @julian

[fr3em1nd]

sorry for necroposting, i've done my research, i would prefer mongoDB since it's just on the disk side, and not taking much memory like Redis. Memory issues are hard to deal with and messes up your whole server