Redis 4.0 brought an amazing feature to the Redis ecosystem: modules. Modules are a big shift in Redis — suddenly, it is an open landscape of custom data types and full-speed computation right inside Redis. But while most of the fanfare over this release focused on Modules, the new version also introduced a super important command that is a game changer in its own right: UNLINK.

To find out if you can use the UNLINK command, run INFO from redis-cli. The response will tell you all about your server. In the first section (#Server), there should be a line called redis_version. If this value is greater than 4.0, you’re ready to use the UNLINK command. All versions of Redis Enterprise 5.0+ and all new subscriptions of Redis Enterprise Cloud should be able to use the UNLINK command. Not all providers of Redis keep up-to-date, so it’s good to check the version before you change any code.

Source: DZone