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Project Notes

About Redis

Redis basics and MacOSX 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

MacOSX 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

Credits and References

About LCK#162 databasesredis
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This page is a web-friendly rendering of my project notes shared in the LittleCodingKata GitHub repository.

LittleCodingKata is my collection of programming exercises, research and code toys broadly spanning things that relate to programming and software development (languages, frameworks and tools).

These range from the trivial to the complex and serious. Many are inspired by existing work and I'll note credits and references where applicable. The focus is quite scattered, as I variously work on things new and important in the moment, or go back to revisit things from the past.

This is primarily a personal collection for my own edification and learning, but anyone who stumbles by is welcome to borrow, steal or reference the work here. And if you spot errors or issues I'd really appreciate some feedback - create an issue, send me an email or even send a pull-request.