#195 Redis
Redis basics and MacOS installation.
Notes
Redis is:
- open source (BSD licensed)
- in-memory data store
- available for most platforms (client and server)
Redis can be used as:
- database
- cache
- message broker
Redis features:
- data structures such as strings, hashes, lists, sets, sorted sets
- built-in replication
- Lua scripting
- LRU eviction
- transactions
- configurable levels of on-disk persistence
MacOS Installation with Brew
Installing with brew and the redis Homebrew formula:
$ brew install redis
..
$ brew info redis
redis: stable 5.0.7 (bottled), HEAD
Persistent key-value database, with built-in net interface
https://redis.io/
/usr/local/Cellar/redis/5.0.7 (13 files, 3.1MB) *
Poured from bottle on 2020-01-09 at 10:07:22
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/redis.rb
==> Options
--HEAD
Install HEAD version
==> Caveats
To restart redis after an upgrade:
brew services restart redis
Or, if you don't want/need a background service you can just run:
redis-server /usr/local/etc/redis.conf
==> Analytics
install: 44,051 (30 days), 109,494 (90 days), 482,890 (365 days)
install-on-request: 41,744 (30 days), 104,199 (90 days), 454,052 (365 days)
build-error: 0 (30 days)
Testing with the CLI tools
Although one is normally interacting with redis using language specific clients, the redis-cli is a useful utility for the command line.
The ping command is used to test the ability to connect to a redis server:
$ redis-cli -v
redis-cli 5.0.7
$ redis-cli ping
PONG
$ redis-cli -h 127.0.0.1 -p 6379 ping
PONG