Meteor Redis
Experimental Redis support is available on Atmosphere
Experiments with Redis
back in Devshop May 2014
by Justin Santa Barbara
On Atmosphere
About Redis
In-memory key-value data store
(with on-disk persistence)
Strings, Hashes, Sets, Ordered Sets, Lists, etc...
Ideas
- Translate MongoDB operations to Redis
- minimize the efforts of porting a mongo-based app
- difficult to map mongo queries to redis
- users still use the mongo api
- Go with direct Redis support
- same api as redis
- miniredis!
- clear performance win
Miniredis
In-memory data-structure in JavaScript to mimic Redis API
Used as a cache for the browser clients and provides latency compensation opportunity (since api is the same)
Redis-livedata
- Gets update from the Redis server (key-space not.)
- Pushes them to the clients based on subscriptions
- Provides the ObserveChanges API
- Deals with allow/deny rules
- Implements the latency compensation
- Proxies local look-ups to Miniredis
Blaze - #each
^
observe | changes
|
Miniredis -> app code
^
| - DDP
v
PubSub (appcode)
| - observeChanges
Redis-Livedata - app code
^
|
Redis
Common Keys pattern
- users::1::firstName - John
- users::1::lastName - Doe
- users::2::firstName - Jane
- users::2::lastName - Doe
Redis.matching("users::1::*")
returns everything related to first user
- fetch
- observeChanges
What works
- Strings
- Hashes
- Latency compensation
- ObserveChanges
- #each in Blaze
- Allow/deny
- pub/sub
- autopublish
What doesn't
- Big Hashes
- Sets, lists, etc
- Accounts (need mongo)
Community FeedbacK
GitHub/Meteor/Redis-LivedataGitHub/Meteor/Miniredis
Meteor Redis Experimental Redis support is available on Atmosphere