aol

A simple immutable append only log in Go. aol is a rewrite of wal to allow only appends to a log.

Features

High durability
Fast operations
Batch writes

Getting Started

Installing

To start using aol, install Go and run go get:

$ go get -u github.com/arriqaaq/aol

This will retrieve the library.

Example

// open a new log file
log, err := Open("mylog", nil)

// write some entries
err = log.Write([]byte("first entry"))
err = log.Write([]byte("second entry"))
err = log.Write([]byte("third entry"))

// read an entry
data, err := log.Read(1,0)
println(string(data))  // output: first entry

// close the log
err = log.Close()

Batch writes:

// write three entries as a batch
batch := new(Batch)
batch.Write(1, []byte("first entry"))
batch.Write(2, []byte("second entry"))
batch.Write(3, []byte("third entry"))

err = log.WriteBatch(batch)

Inspiration

wal by @tidwall