goleveldb

goleveldb is a simple implementation version of leveldb, which is used for learning purposes.

Now support:

Getting Started

From your project, run the following command, this will retrieve the library.

go get github.com/huayichai/goleveldb

Following is an example.

package main

import "github.com/huayichai/goleveldb"

func main() {
	// Set Options
	options := goleveldb.DefaultOptions()
	options.DirPath = "/tmp/goleveldb_basic"

	// Open goleveldb
	db, err := goleveldb.Open(*options)
	if err != nil {
		panic(err)
	}
	defer func() {
		_ = db.Close()
		_ = os.RemoveAll(options.DirPath)
	}()

	// Put Key-Value
	key := []byte("KV store engine")
	value := []byte("goleveldb")
	err = db.Put(key, value)
	if err != nil {
		panic(err)
	}

	// Get Key-Value
	value, err = db.Get(key)
	if err != nil {
		panic(err)
	}
	println(string(value))
}

Performance

We put a million entries into db. Each entry has a 16 byte key, and a 110 byte value.

Benchmark Entries: 1000000
Throughput: 267165 QPS
Latency: 3.743 micros/op; 32.1 MB/s
Spatial amplification: 1.188, real data size: 142.713 (MB), raw data size: 120.163 (MB)
DB close successfully! Bye~PASS