mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
387 lines
9.4 KiB
Go
387 lines
9.4 KiB
Go
package leveldb
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"crypto/md5"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"strings"
|
|
"sync"
|
|
|
|
"github.com/syndtr/goleveldb/leveldb"
|
|
leveldb_errors "github.com/syndtr/goleveldb/leveldb/errors"
|
|
"github.com/syndtr/goleveldb/leveldb/filter"
|
|
"github.com/syndtr/goleveldb/leveldb/opt"
|
|
leveldb_util "github.com/syndtr/goleveldb/leveldb/util"
|
|
|
|
"github.com/seaweedfs/seaweedfs/weed/filer"
|
|
"github.com/seaweedfs/seaweedfs/weed/glog"
|
|
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
|
|
weed_util "github.com/seaweedfs/seaweedfs/weed/util"
|
|
)
|
|
|
|
const (
|
|
DEFAULT = "_main"
|
|
)
|
|
|
|
func init() {
|
|
filer.Stores = append(filer.Stores, &LevelDB3Store{})
|
|
}
|
|
|
|
type LevelDB3Store struct {
|
|
dir string
|
|
dbs map[string]*leveldb.DB
|
|
dbsLock sync.RWMutex
|
|
}
|
|
|
|
func (store *LevelDB3Store) GetName() string {
|
|
return "leveldb3"
|
|
}
|
|
|
|
func (store *LevelDB3Store) Initialize(configuration weed_util.Configuration, prefix string) (err error) {
|
|
dir := configuration.GetString(prefix + "dir")
|
|
return store.initialize(dir)
|
|
}
|
|
|
|
func (store *LevelDB3Store) initialize(dir string) (err error) {
|
|
glog.Infof("filer store leveldb3 dir: %s", dir)
|
|
os.MkdirAll(dir, 0755)
|
|
if err := weed_util.TestFolderWritable(dir); err != nil {
|
|
return fmt.Errorf("Check Level Folder %s Writable: %s", dir, err)
|
|
}
|
|
store.dir = dir
|
|
|
|
db, loadDbErr := store.loadDB(DEFAULT)
|
|
if loadDbErr != nil {
|
|
return loadDbErr
|
|
}
|
|
store.dbs = make(map[string]*leveldb.DB)
|
|
store.dbs[DEFAULT] = db
|
|
|
|
return
|
|
}
|
|
|
|
func (store *LevelDB3Store) loadDB(name string) (*leveldb.DB, error) {
|
|
bloom := filter.NewBloomFilter(8) // false positive rate 0.02
|
|
opts := &opt.Options{
|
|
BlockCacheCapacity: 32 * 1024 * 1024, // default value is 8MiB
|
|
WriteBuffer: 16 * 1024 * 1024, // default value is 4MiB
|
|
Filter: bloom,
|
|
}
|
|
if name != DEFAULT {
|
|
opts = &opt.Options{
|
|
BlockCacheCapacity: 16 * 1024 * 1024, // default value is 8MiB
|
|
WriteBuffer: 8 * 1024 * 1024, // default value is 4MiB
|
|
Filter: bloom,
|
|
}
|
|
}
|
|
|
|
dbFolder := fmt.Sprintf("%s/%s", store.dir, name)
|
|
os.MkdirAll(dbFolder, 0755)
|
|
db, dbErr := leveldb.OpenFile(dbFolder, opts)
|
|
if leveldb_errors.IsCorrupted(dbErr) {
|
|
db, dbErr = leveldb.RecoverFile(dbFolder, opts)
|
|
}
|
|
if dbErr != nil {
|
|
glog.Errorf("filer store open dir %s: %v", dbFolder, dbErr)
|
|
return nil, dbErr
|
|
}
|
|
return db, nil
|
|
}
|
|
|
|
func (store *LevelDB3Store) findDB(fullpath weed_util.FullPath, isForChildren bool) (*leveldb.DB, string, weed_util.FullPath, error) {
|
|
|
|
store.dbsLock.RLock()
|
|
|
|
defaultDB := store.dbs[DEFAULT]
|
|
if !strings.HasPrefix(string(fullpath), "/buckets/") {
|
|
store.dbsLock.RUnlock()
|
|
return defaultDB, DEFAULT, fullpath, nil
|
|
}
|
|
|
|
// detect bucket
|
|
bucketAndObjectKey := string(fullpath)[len("/buckets/"):]
|
|
t := strings.Index(bucketAndObjectKey, "/")
|
|
if t < 0 && !isForChildren {
|
|
store.dbsLock.RUnlock()
|
|
return defaultDB, DEFAULT, fullpath, nil
|
|
}
|
|
bucket := bucketAndObjectKey
|
|
shortPath := weed_util.FullPath("/")
|
|
if t > 0 {
|
|
bucket = bucketAndObjectKey[:t]
|
|
shortPath = weed_util.FullPath(bucketAndObjectKey[t:])
|
|
}
|
|
|
|
if db, found := store.dbs[bucket]; found {
|
|
store.dbsLock.RUnlock()
|
|
return db, bucket, shortPath, nil
|
|
}
|
|
|
|
store.dbsLock.RUnlock()
|
|
|
|
db, err := store.createDB(bucket)
|
|
|
|
return db, bucket, shortPath, err
|
|
}
|
|
|
|
func (store *LevelDB3Store) createDB(bucket string) (*leveldb.DB, error) {
|
|
|
|
store.dbsLock.Lock()
|
|
defer store.dbsLock.Unlock()
|
|
|
|
// double check after getting the write lock
|
|
if db, found := store.dbs[bucket]; found {
|
|
return db, nil
|
|
}
|
|
|
|
// create db
|
|
db, err := store.loadDB(bucket)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
store.dbs[bucket] = db
|
|
|
|
return db, nil
|
|
}
|
|
|
|
func (store *LevelDB3Store) closeDB(bucket string) {
|
|
|
|
store.dbsLock.Lock()
|
|
defer store.dbsLock.Unlock()
|
|
|
|
if db, found := store.dbs[bucket]; found {
|
|
db.Close()
|
|
delete(store.dbs, bucket)
|
|
}
|
|
|
|
}
|
|
|
|
func (store *LevelDB3Store) BeginTransaction(ctx context.Context) (context.Context, error) {
|
|
return ctx, nil
|
|
}
|
|
func (store *LevelDB3Store) CommitTransaction(ctx context.Context) error {
|
|
return nil
|
|
}
|
|
func (store *LevelDB3Store) RollbackTransaction(ctx context.Context) error {
|
|
return nil
|
|
}
|
|
|
|
func (store *LevelDB3Store) InsertEntry(ctx context.Context, entry *filer.Entry) (err error) {
|
|
|
|
db, _, shortPath, err := store.findDB(entry.FullPath, false)
|
|
if err != nil {
|
|
return fmt.Errorf("findDB %s : %v", entry.FullPath, err)
|
|
}
|
|
|
|
dir, name := shortPath.DirAndName()
|
|
key := genKey(dir, name)
|
|
|
|
value, err := entry.EncodeAttributesAndChunks()
|
|
if err != nil {
|
|
return fmt.Errorf("encoding %s %+v: %v", entry.FullPath, entry.Attr, err)
|
|
}
|
|
|
|
if len(entry.GetChunks()) > filer.CountEntryChunksForGzip {
|
|
value = weed_util.MaybeGzipData(value)
|
|
}
|
|
|
|
err = db.Put(key, value, nil)
|
|
|
|
if err != nil {
|
|
return fmt.Errorf("persisting %s : %v", entry.FullPath, err)
|
|
}
|
|
|
|
// println("saved", entry.FullPath, "chunks", len(entry.GetChunks()))
|
|
|
|
return nil
|
|
}
|
|
|
|
func (store *LevelDB3Store) UpdateEntry(ctx context.Context, entry *filer.Entry) (err error) {
|
|
|
|
return store.InsertEntry(ctx, entry)
|
|
}
|
|
|
|
func (store *LevelDB3Store) FindEntry(ctx context.Context, fullpath weed_util.FullPath) (entry *filer.Entry, err error) {
|
|
|
|
db, _, shortPath, err := store.findDB(fullpath, false)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("findDB %s : %v", fullpath, err)
|
|
}
|
|
|
|
dir, name := shortPath.DirAndName()
|
|
key := genKey(dir, name)
|
|
|
|
data, err := db.Get(key, nil)
|
|
|
|
if err == leveldb.ErrNotFound {
|
|
return nil, filer_pb.ErrNotFound
|
|
}
|
|
if err != nil {
|
|
return nil, fmt.Errorf("get %s : %v", fullpath, err)
|
|
}
|
|
|
|
entry = &filer.Entry{
|
|
FullPath: fullpath,
|
|
}
|
|
err = entry.DecodeAttributesAndChunks(weed_util.MaybeDecompressData(data))
|
|
if err != nil {
|
|
return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err)
|
|
}
|
|
|
|
// println("read", entry.FullPath, "chunks", len(entry.GetChunks()), "data", len(data), string(data))
|
|
|
|
return entry, nil
|
|
}
|
|
|
|
func (store *LevelDB3Store) DeleteEntry(ctx context.Context, fullpath weed_util.FullPath) (err error) {
|
|
|
|
db, _, shortPath, err := store.findDB(fullpath, false)
|
|
if err != nil {
|
|
return fmt.Errorf("findDB %s : %v", fullpath, err)
|
|
}
|
|
|
|
dir, name := shortPath.DirAndName()
|
|
key := genKey(dir, name)
|
|
|
|
err = db.Delete(key, nil)
|
|
if err != nil {
|
|
return fmt.Errorf("delete %s : %v", fullpath, err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (store *LevelDB3Store) DeleteFolderChildren(ctx context.Context, fullpath weed_util.FullPath) (err error) {
|
|
|
|
db, bucket, shortPath, err := store.findDB(fullpath, true)
|
|
if err != nil {
|
|
return fmt.Errorf("findDB %s : %v", fullpath, err)
|
|
}
|
|
|
|
if bucket != DEFAULT && shortPath == "/" {
|
|
store.closeDB(bucket)
|
|
if bucket != "" { // just to make sure
|
|
os.RemoveAll(store.dir + "/" + bucket)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
directoryPrefix := genDirectoryKeyPrefix(shortPath, "")
|
|
|
|
batch := new(leveldb.Batch)
|
|
|
|
iter := db.NewIterator(&leveldb_util.Range{Start: directoryPrefix}, nil)
|
|
for iter.Next() {
|
|
key := iter.Key()
|
|
if !bytes.HasPrefix(key, directoryPrefix) {
|
|
break
|
|
}
|
|
fileName := getNameFromKey(key)
|
|
if fileName == "" {
|
|
continue
|
|
}
|
|
batch.Delete(append(directoryPrefix, []byte(fileName)...))
|
|
}
|
|
iter.Release()
|
|
|
|
err = db.Write(batch, nil)
|
|
|
|
if err != nil {
|
|
return fmt.Errorf("delete %s : %v", fullpath, err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (store *LevelDB3Store) ListDirectoryEntries(ctx context.Context, dirPath weed_util.FullPath, startFileName string, includeStartFile bool, limit int64, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
|
|
return store.ListDirectoryPrefixedEntries(ctx, dirPath, startFileName, includeStartFile, limit, "", eachEntryFunc)
|
|
}
|
|
|
|
func (store *LevelDB3Store) ListDirectoryPrefixedEntries(ctx context.Context, dirPath weed_util.FullPath, startFileName string, includeStartFile bool, limit int64, prefix string, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
|
|
|
|
db, _, shortPath, err := store.findDB(dirPath, true)
|
|
if err != nil {
|
|
return lastFileName, fmt.Errorf("findDB %s : %v", dirPath, err)
|
|
}
|
|
|
|
directoryPrefix := genDirectoryKeyPrefix(shortPath, prefix)
|
|
lastFileStart := directoryPrefix
|
|
if startFileName != "" {
|
|
lastFileStart = genDirectoryKeyPrefix(shortPath, startFileName)
|
|
}
|
|
|
|
iter := db.NewIterator(&leveldb_util.Range{Start: lastFileStart}, nil)
|
|
for iter.Next() {
|
|
key := iter.Key()
|
|
if !bytes.HasPrefix(key, directoryPrefix) {
|
|
break
|
|
}
|
|
fileName := getNameFromKey(key)
|
|
if fileName == "" {
|
|
continue
|
|
}
|
|
if fileName == startFileName && !includeStartFile {
|
|
continue
|
|
}
|
|
limit--
|
|
if limit < 0 {
|
|
break
|
|
}
|
|
lastFileName = fileName
|
|
entry := &filer.Entry{
|
|
FullPath: weed_util.NewFullPath(string(dirPath), fileName),
|
|
}
|
|
|
|
// println("list", entry.FullPath, "chunks", len(entry.GetChunks()))
|
|
if decodeErr := entry.DecodeAttributesAndChunks(weed_util.MaybeDecompressData(iter.Value())); decodeErr != nil {
|
|
err = decodeErr
|
|
glog.V(0).Infof("list %s : %v", entry.FullPath, err)
|
|
break
|
|
}
|
|
if !eachEntryFunc(entry) {
|
|
break
|
|
}
|
|
}
|
|
iter.Release()
|
|
|
|
return lastFileName, err
|
|
}
|
|
|
|
func genKey(dirPath, fileName string) (key []byte) {
|
|
key = hashToBytes(dirPath)
|
|
key = append(key, []byte(fileName)...)
|
|
return key
|
|
}
|
|
|
|
func genDirectoryKeyPrefix(fullpath weed_util.FullPath, startFileName string) (keyPrefix []byte) {
|
|
keyPrefix = hashToBytes(string(fullpath))
|
|
if len(startFileName) > 0 {
|
|
keyPrefix = append(keyPrefix, []byte(startFileName)...)
|
|
}
|
|
return keyPrefix
|
|
}
|
|
|
|
func getNameFromKey(key []byte) string {
|
|
|
|
return string(key[md5.Size:])
|
|
|
|
}
|
|
|
|
// hash directory
|
|
func hashToBytes(dir string) []byte {
|
|
h := md5.New()
|
|
io.WriteString(h, dir)
|
|
b := h.Sum(nil)
|
|
return b
|
|
}
|
|
|
|
func (store *LevelDB3Store) Shutdown() {
|
|
for _, db := range store.dbs {
|
|
db.Close()
|
|
}
|
|
}
|