Module versioning 

Recyclable cache versioning (Rails cache_versioning): a stored entry carries a version, and a read with a different version is a miss — so bumping the version cheaply invalidates without deleting keys.

Functions

read_versioned

Read key only if its stored version matches version; a mismatch (or a missing key) is a miss.

versioned_key

A versioned key: versioned_key("post/1", 3) → "post/1:v3".

write_versioned

Store value under key tagged with version.