v0.4.0

Redka aims to reimplement the good parts of Redis with SQLite, while remaining compatible with the Redis API. This release adds support for list commands and improves throughput quite a bit (+20% for writes, +60% for reads).

All commands are available via the Redis wire protocol (RESP) and the Go API.

Installation • Usage • Roadmap

Special thanks to @yinzhidong for implementing the PING command.

Lists

Redka supports the following list-related commands:

• LINDEX - Returns an element from a list by its index.
• LINSERT - Inserts an element before or after another element in a list.
• LLEN - Returns the length of a list.
• LPOP - Returns the first element of a list after removing it.
• LPUSH - Prepends an element to a list.
• LRANGE - Returns a range of elements from a list.
• LREM - Removes elements from a list.
• LSET - Sets the value of an element in a list by its index.
• LTRIM - Removes elements from both ends a list.
• RPOP - Returns the last element of a list after removing it.
• RPOPLPUSH - Removes the last element and pushes it to another list.
• RPUSH - Appends an element to a list.

⚠️ Breaking changes

Until Redka reaches 1.0, I may introduce breaking changes with each release. Sorry for that.

rkey.DB / rkey.Tx interface changes:

- Scan(cursor int, pattern string, count int) (ScanResult, error)
+ Scan(cursor int, pattern string, ktype core.TypeID, count int) (ScanResult, error)

- Scanner(pattern string, pageSize int) *Scanner
+ Scanner(pattern string, ktype core.TypeID, pageSize int) *Scanner

There are also some non-backward-compatible database schema changes, and I'd rather not introduce automated migrations until 1.0. If you are already using Redka in production and need a migration, let me know in the issues.