hmap

README

hmap

Hybrid memory/disk map that helps you to manage key value storage for input deduplication.

---

Available functions:

Name	Declaration/Params/Return
New	func New(options Options) (*HybridMap, error){}
Close	func (hm *HybridMap) Close() error{}
Set	func (hm *HybridMap) Set(k string, v []byte) error{}
Get	func (hm *HybridMap) Get(k string) ([]byte, bool){}
Del	func (hm *HybridMap) Del(key string) error{}
Scan	func (hm *HybridMap) Scan(f func([]byte, []byte) error){}
Size	func (hm *HybridMap) Size() int64{}
TuneMemory	func (hm *HybridMap) TuneMemory(){}

Available options:

const (
	Memory MapType = iota
	Disk
	Hybrid
)

type DBType int

const (
	LevelDB DBType = iota
	PogrebDB
	BBoltDB
	BuntDB
)

Name	Props
DefaultOptions	- Type: Memory - MemoryExpirationTime: time.Duration(5) * time.Minute - JanitorTime: time.Duration(1) * time.Minute
DefaultMemoryOptions	- Type: Memory
DefaultDiskOptions	- Type: Disk - DBType: LevelDB - Cleanup: true - RemoveOlderThan: 24* time.Hour *2
DefaultDiskOptions	- Type: Hybrid - DBType: PogrebDB - MemoryExpirationTime: time.Duration(5) * time.Minute - JanitorTime: time.Duration(1) * time.Minute

Custom options:

type Options struct {
	MemoryExpirationTime time.Duration
	DiskExpirationTime   time.Duration
	JanitorTime          time.Duration
	Type                 MapType
	DBType               DBType
	MemoryGuardForceDisk bool
	MemoryGuard          bool
	MaxMemorySize        int
	MemoryGuardTime      time.Duration
	Path                 string
	Cleanup              bool
	Name                 string
	RemoveOlderThan time.Duration
}

Simple usage example

func main() {
	var wg sync.WaitGroup
	wg.Add(1)
	go normal(&wg)
	wg.Wait()
}

func normal(wg *sync.WaitGroup) {
	defer wg.Done()
	hm, err := hybrid.New(hybrid.DefaultOptions)
	if err != nil {
		log.Fatal(err)
	}
	defer hm.Close()
	err2 := hm.Set("a", []byte("b"))
	if err2 != nil {
		log.Fatal(err2)
	}
	v, ok := hm.Get("a")
	if ok {
		log.Println(v)
	}
}

License

hmap is distributed under MIT License