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lokidb engine

LokiDB storage engine

Test​

Import​

go get github.com/hvuhsg/lokidb/engine

Features​

  • storage on disk for consistency
  • in-memory LRU cache for read optimization
  • deleted keys cleanup for disk space saving
  • distribution of keys across multiple files for maximazing file access time

Interface​

type KeyValueStore interface {
    Set(string, []byte) error
    Get(string, func(cursor.Cursor) ([]byte, error)) []byte
    Del(string) bool
    Keys() []string
    Flush()
    Search(func(value []byte) bool) ([][]byte, error)
}

Example​

package main

import (
    "fmt"

    "github.com/hvuhsg/lokidb/engine"
)

func main() {
    filesDir := "./"
    cacheSize := 20000
    numberOfFiles := 5

    db := engine.New(filesDir, cacheSize, numberOfFiles)

    db.Set("name", []byte("mosh"))
    db.Set("age", []byte{5})

    name := db.Get("name")     // []byte("mosh")
    fmt.Printf("%s\n", name)

    deleted := db.Del("name")  // true
    
    name = db.Get("name", nil) // nil
    fmt.Println(name, deleted)
}