mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-12-25 18:27:54 +08:00
124 lines
2.9 KiB
Go
124 lines
2.9 KiB
Go
package storage
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"os"
|
|
"sync"
|
|
|
|
"github.com/chrislusf/seaweedfs/go/util"
|
|
)
|
|
|
|
type NeedleMapType int
|
|
|
|
const (
|
|
NeedleMapInMemory NeedleMapType = iota
|
|
NeedleMapLevelDb
|
|
NeedleMapBoltDb
|
|
)
|
|
|
|
type NeedleMapper interface {
|
|
Put(key uint64, offset uint32, size uint32) error
|
|
Get(key uint64) (element *NeedleValue, ok bool)
|
|
Delete(key uint64) error
|
|
Close()
|
|
Destroy() error
|
|
ContentSize() uint64
|
|
DeletedSize() uint64
|
|
FileCount() int
|
|
DeletedCount() int
|
|
MaxFileKey() uint64
|
|
IndexFileSize() uint64
|
|
IndexFileContent() ([]byte, error)
|
|
IndexFileName() string
|
|
}
|
|
|
|
type baseNeedleMapper struct {
|
|
indexFile *os.File
|
|
indexFileAccessLock sync.Mutex
|
|
|
|
mapMetric
|
|
}
|
|
|
|
func (nm *baseNeedleMapper) IndexFileSize() uint64 {
|
|
stat, err := nm.indexFile.Stat()
|
|
if err == nil {
|
|
return uint64(stat.Size())
|
|
}
|
|
return 0
|
|
}
|
|
|
|
func (nm *baseNeedleMapper) IndexFileName() string {
|
|
return nm.indexFile.Name()
|
|
}
|
|
|
|
func idxFileEntry(bytes []byte) (key uint64, offset uint32, size uint32) {
|
|
key = util.BytesToUint64(bytes[:8])
|
|
offset = util.BytesToUint32(bytes[8:12])
|
|
size = util.BytesToUint32(bytes[12:16])
|
|
return
|
|
}
|
|
func (nm *baseNeedleMapper) appendToIndexFile(key uint64, offset uint32, size uint32) error {
|
|
bytes := make([]byte, 16)
|
|
util.Uint64toBytes(bytes[0:8], key)
|
|
util.Uint32toBytes(bytes[8:12], offset)
|
|
util.Uint32toBytes(bytes[12:16], size)
|
|
|
|
nm.indexFileAccessLock.Lock()
|
|
defer nm.indexFileAccessLock.Unlock()
|
|
if _, err := nm.indexFile.Seek(0, 2); err != nil {
|
|
return fmt.Errorf("cannot seek end of indexfile %s: %v",
|
|
nm.indexFile.Name(), err)
|
|
}
|
|
_, err := nm.indexFile.Write(bytes)
|
|
return err
|
|
}
|
|
func (nm *baseNeedleMapper) IndexFileContent() ([]byte, error) {
|
|
nm.indexFileAccessLock.Lock()
|
|
defer nm.indexFileAccessLock.Unlock()
|
|
return ioutil.ReadFile(nm.indexFile.Name())
|
|
}
|
|
|
|
type mapMetric struct {
|
|
indexFile *os.File
|
|
|
|
DeletionCounter int `json:"DeletionCounter"`
|
|
FileCounter int `json:"FileCounter"`
|
|
DeletionByteCounter uint64 `json:"DeletionByteCounter"`
|
|
FileByteCounter uint64 `json:"FileByteCounter"`
|
|
MaximumFileKey uint64 `json:"MaxFileKey"`
|
|
}
|
|
|
|
func (mm *mapMetric) logDelete(deletedByteCount uint32) {
|
|
mm.DeletionByteCounter = mm.DeletionByteCounter + uint64(deletedByteCount)
|
|
mm.DeletionCounter++
|
|
}
|
|
|
|
func (mm *mapMetric) logPut(key uint64, oldSize uint32, newSize uint32) {
|
|
if key > mm.MaximumFileKey {
|
|
mm.MaximumFileKey = key
|
|
}
|
|
mm.FileCounter++
|
|
mm.FileByteCounter = mm.FileByteCounter + uint64(newSize)
|
|
if oldSize > 0 {
|
|
mm.DeletionCounter++
|
|
mm.DeletionByteCounter = mm.DeletionByteCounter + uint64(oldSize)
|
|
}
|
|
}
|
|
|
|
func (mm mapMetric) ContentSize() uint64 {
|
|
return mm.FileByteCounter
|
|
}
|
|
func (mm mapMetric) DeletedSize() uint64 {
|
|
return mm.DeletionByteCounter
|
|
}
|
|
func (mm mapMetric) FileCount() int {
|
|
return mm.FileCounter
|
|
}
|
|
func (mm mapMetric) DeletedCount() int {
|
|
return mm.DeletionCounter
|
|
}
|
|
func (mm mapMetric) MaxFileKey() uint64 {
|
|
return mm.MaximumFileKey
|
|
}
|