add redis3

weed/command/imports.go

@@ -29,6 +29,7 @@ import (
 	_ "github.com/chrislusf/seaweedfs/weed/filer/postgres2"
 	_ "github.com/chrislusf/seaweedfs/weed/filer/redis"
 	_ "github.com/chrislusf/seaweedfs/weed/filer/redis2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/redis3"
 	_ "github.com/chrislusf/seaweedfs/weed/filer/sqlite"
 	_ "github.com/chrislusf/seaweedfs/weed/filer/tikv"
 )

weed/filer.toml

@@ -0,0 +1,5 @@
+[redis3]
+enabled = true
+address = "localhost:6379"
+password = ""
+database = 0

weed/filer/redis3/kv_directory_children.go

@@ -3,11 +3,13 @@ package redis3
 import (
 	"context"
 	"fmt"
-	"github.com/chrislusf/seaweedfs/weed/util/bptree"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/util/skiplist"
 	"github.com/go-redis/redis/v8"
-	"github.com/golang/protobuf/proto"
 )
 
+const maxNameBatchSizeLimit = 5
+
 func insertChild(ctx context.Context, client redis.UniversalClient, key string, name string) error {
 	data, err := client.Get(ctx, key).Result()
 	if err != nil {
@@ -15,12 +17,22 @@ func insertChild(ctx context.Context, client redis.UniversalClient, key string,
 			return fmt.Errorf("read %s: %v", key, err)
 		}
 	}
-	rootNode := &bptree.ProtoNode{}
-	if err := proto.UnmarshalMerge([]byte(data), rootNode); err != nil {
-		return fmt.Errorf("decoding root for %s: %v", key, err)
+	store := newSkipListElementStore(key, client)
+	nameList := skiplist.LoadNameList([]byte(data), store, maxNameBatchSizeLimit)
+
+	// println("add", key, name)
+	if err := nameList.WriteName(name); err != nil {
+		glog.Errorf("add %s %s: %v", key, name, err)
+		return err
+	}
+	if !nameList.HasChanges() {
+		return nil
+	}
+
+	if err := client.Set(ctx, key, nameList.ToBytes(), 0).Err(); err != nil {
+		return err
 	}
-	tree := rootNode.ToBpTree()
-	tree.Add(bptree.String(name), nil)
+
 	return nil
 }
 
@@ -31,19 +43,69 @@ func removeChild(ctx context.Context, client redis.UniversalClient, key string,
 			return fmt.Errorf("read %s: %v", key, err)
 		}
 	}
-	rootNode := &bptree.ProtoNode{}
-	if err := proto.UnmarshalMerge([]byte(data), rootNode); err != nil {
-		return fmt.Errorf("decoding root for %s: %v", key, err)
+	store := newSkipListElementStore(key, client)
+	nameList := skiplist.LoadNameList([]byte(data), store, maxNameBatchSizeLimit)
+
+	if err := nameList.DeleteName(name); err != nil {
+		return err
 	}
-	tree := rootNode.ToBpTree()
-	tree.Add(bptree.String(name), nil)
+	if !nameList.HasChanges() {
+		return nil
+	}
+
+	if err := client.Set(ctx, key, nameList.ToBytes(), 0).Err(); err != nil {
+		return err
+	}
+
 	return nil
 }
 
 func removeChildren(ctx context.Context, client redis.UniversalClient, key string, onDeleteFn func(name string) error) error {
+
+	data, err := client.Get(ctx, key).Result()
+	if err != nil {
+		if err != redis.Nil {
+			return fmt.Errorf("read %s: %v", key, err)
+		}
+	}
+	store := newSkipListElementStore(key, client)
+	nameList := skiplist.LoadNameList([]byte(data), store, maxNameBatchSizeLimit)
+
+	if err = nameList.ListNames("", func(name string) bool {
+		if err := onDeleteFn(name); err != nil {
+			glog.Errorf("delete %s child %s: %v", key, name, err)
+			return false
+		}
+		return true
+	}); err != nil {
+		return err
+	}
+
+	if err = nameList.RemoteAllListElement(); err != nil {
+		return err
+	}
+
 	return nil
+
+}
+
+func listChildren(ctx context.Context, client redis.UniversalClient, key string, startFileName string, eachFn func(name string) bool) error {
+
+	data, err := client.Get(ctx, key).Result()
+	if err != nil {
+		if err != redis.Nil {
+			return fmt.Errorf("read %s: %v", key, err)
+		}
+	}
+	store := newSkipListElementStore(key, client)
+	nameList := skiplist.LoadNameList([]byte(data), store, maxNameBatchSizeLimit)
+
+	if err = nameList.ListNames(startFileName, func(name string) bool {
+		return eachFn(name)
+	}); err != nil {
+		return err
 	}
 
-func iterateChildren(ctx context.Context, client redis.UniversalClient, key string, eachFn func(name string) error) error {
 	return nil
+
 }

weed/filer/redis3/skiplist_element_store.go

@@ -0,0 +1,52 @@
+package redis3
+
+import (
+	"context"
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/util/skiplist"
+	"github.com/go-redis/redis/v8"
+	"github.com/golang/protobuf/proto"
+)
+
+type SkipListElementStore struct {
+	prefix string
+	client redis.UniversalClient
+}
+
+var _ = skiplist.ListStore(&SkipListElementStore{})
+
+func newSkipListElementStore(prefix string, client redis.UniversalClient) *SkipListElementStore {
+	return &SkipListElementStore{
+		prefix: prefix,
+		client: client,
+	}
+}
+
+func (m *SkipListElementStore) SaveElement(id int64, element *skiplist.SkipListElement) error {
+	key := fmt.Sprintf("%s%d", m.prefix, id)
+	data, err := proto.Marshal(element)
+	if err != nil {
+		glog.Errorf("marshal %s: %v", key, err)
+	}
+	return m.client.Set(context.Background(), key, data, 0).Err()
+}
+
+func (m *SkipListElementStore) DeleteElement(id int64) error {
+	key := fmt.Sprintf("%s%d", m.prefix, id)
+	return m.client.Del(context.Background(), key).Err()
+}
+
+func (m *SkipListElementStore) LoadElement(id int64) (*skiplist.SkipListElement, error) {
+	key := fmt.Sprintf("%s%d", m.prefix, id)
+	data, err := m.client.Get(context.Background(), key).Result()
+	if err != nil {
+		if err == redis.Nil {
+			return nil, nil
+		}
+		return nil, err
+	}
+	t := &skiplist.SkipListElement{}
+	err = proto.Unmarshal([]byte(data), t)
+	return t, err
+}

weed/filer/redis3/universal_redis_store.go

@@ -115,6 +115,8 @@ func (store *UniversalRedis3Store) DeleteFolderChildren(ctx context.Context, ful
 		if err != nil {
 			return fmt.Errorf("DeleteFolderChildren %s in parent dir: %v", fullpath, err)
 		}
+		// not efficient, but need to remove if it is a directory
+		store.Client.Del(ctx, genDirectoryListKey(string(path)))
 		return nil
 	})
 
@@ -127,41 +129,41 @@ func (store *UniversalRedis3Store) ListDirectoryPrefixedEntries(ctx context.Cont
 func (store *UniversalRedis3Store) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
 
 	dirListKey := genDirectoryListKey(string(dirPath))
-	start := int64(0)
+	counter := int64(0)
+
+	err = listChildren(ctx, store.Client, dirListKey, startFileName, func(fileName string) bool {
 		if startFileName != "" {
-		start, _ = store.Client.ZRank(ctx, dirListKey, startFileName).Result()
-		if !includeStartFile {
-			start++
-		}
+			if !includeStartFile && startFileName == fileName {
+				return true
 			}
-	members, err := store.Client.ZRange(ctx, dirListKey, start, start+int64(limit)-1).Result()
-	if err != nil {
-		return lastFileName, fmt.Errorf("list %s : %v", dirPath, err)
 		}
 
-	// fetch entry meta
-	for _, fileName := range members {
 		path := util.NewFullPath(string(dirPath), fileName)
 		entry, err := store.FindEntry(ctx, path)
 		lastFileName = fileName
 		if err != nil {
 			glog.V(0).Infof("list %s : %v", path, err)
 			if err == filer_pb.ErrNotFound {
-				continue
+				return true
 			}
 		} else {
 			if entry.TtlSec > 0 {
 				if entry.Attr.Crtime.Add(time.Duration(entry.TtlSec) * time.Second).Before(time.Now()) {
 					store.Client.Del(ctx, string(path)).Result()
 					store.Client.ZRem(ctx, dirListKey, fileName).Result()
-					continue
+					return true
 				}
 			}
+			counter++
 			if !eachEntryFunc(entry) {
-				break
+				return false
 			}
+			if counter >= limit {
+				return false
 			}
 		}
+		return true
+	})
 
 	return lastFileName, err
 }

weed/server/filer_server.go

@@ -34,6 +34,7 @@ import (
 	_ "github.com/chrislusf/seaweedfs/weed/filer/postgres2"
 	_ "github.com/chrislusf/seaweedfs/weed/filer/redis"
 	_ "github.com/chrislusf/seaweedfs/weed/filer/redis2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/redis3"
 	_ "github.com/chrislusf/seaweedfs/weed/filer/sqlite"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/notification"

weed/util/skiplist/name_batch.go

@@ -35,7 +35,7 @@ func (nb *NameBatch) DeleteName(name string) {
 }
 func (nb *NameBatch) ListNames(startFrom string, visitNamesFn func(name string) bool) bool {
 	var names []string
-	needFilter := startFrom == ""
+	needFilter := startFrom != ""
 	for n := range nb.names {
 		if !needFilter || strings.Compare(n, startFrom) >= 0 {
 			names = append(names, n)

weed/util/skiplist/name_list.go

@@ -9,7 +9,7 @@ type NameList struct {
 	batchSize int
 }
 
-func NewNameList(store ListStore, batchSize int) *NameList {
+func newNameList(store ListStore, batchSize int) *NameList {
 	return &NameList{
 		skipList:  New(store),
 		batchSize: batchSize,
@@ -59,6 +59,7 @@ There are multiple cases after finding the name for greater or equal node
 
 */
 func (nl *NameList) WriteName(name string) error {
+
 	lookupKey := []byte(name)
 	prevNode, nextNode, found, err := nl.skipList.FindGreaterOrEqual(lookupKey)
 	if err != nil {
@@ -301,3 +302,25 @@ func (nl *NameList) ListNames(startFrom string, visitNamesFn func(name string) b
 
 	return nil
 }
+
+func (nl *NameList) RemoteAllListElement() error {
+
+	t := nl.skipList
+
+	nodeRef := t.startLevels[0]
+	for nodeRef != nil {
+		node, err := t.loadElement(nodeRef)
+		if err != nil {
+			return err
+		}
+		if node == nil {
+			return nil
+		}
+		if err := t.deleteElement(node); err != nil {
+			return err
+		}
+		nodeRef = node.Next[0]
+	}
+	return nil
+
+}

weed/util/skiplist/name_list_serde.go

@@ -0,0 +1,71 @@
+package skiplist
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/golang/protobuf/proto"
+)
+
+func LoadNameList(data []byte, store ListStore, batchSize int) *NameList {
+
+	nl := &NameList{
+		skipList:  New(store),
+		batchSize: batchSize,
+	}
+
+	if len(data) == 0 {
+		return nl
+	}
+
+	message := &SkipListProto{}
+	if err := proto.Unmarshal(data, message); err != nil {
+		glog.Errorf("loading skiplist: %v", err)
+	}
+	nl.skipList.maxNewLevel = int(message.MaxNewLevel)
+	nl.skipList.maxLevel = int(message.MaxLevel)
+	for i, ref := range message.StartLevels {
+		nl.skipList.startLevels[i] = &SkipListElementReference{
+			ElementPointer: ref.ElementPointer,
+			Key:            ref.Key,
+		}
+	}
+	for i, ref := range message.EndLevels {
+		nl.skipList.endLevels[i] = &SkipListElementReference{
+			ElementPointer: ref.ElementPointer,
+			Key:            ref.Key,
+		}
+	}
+	return nl
+}
+
+func (nl *NameList) HasChanges() bool {
+	return nl.skipList.hasChanges
+}
+
+func (nl *NameList) ToBytes() []byte {
+	message := &SkipListProto{}
+	message.MaxNewLevel = int32(nl.skipList.maxNewLevel)
+	message.MaxLevel = int32(nl.skipList.maxLevel)
+	for _, ref := range nl.skipList.startLevels {
+		if ref == nil {
+			break
+		}
+		message.StartLevels = append(message.StartLevels, &SkipListElementReference{
+			ElementPointer: ref.ElementPointer,
+			Key:            ref.Key,
+		})
+	}
+	for _, ref := range nl.skipList.endLevels {
+		if ref == nil {
+			break
+		}
+		message.EndLevels = append(message.EndLevels, &SkipListElementReference{
+			ElementPointer: ref.ElementPointer,
+			Key:            ref.Key,
+		})
+	}
+	data, err := proto.Marshal(message)
+	if err != nil {
+		glog.Errorf("marshal skiplist: %v", err)
+	}
+	return data
+}

weed/util/skiplist/name_list_test.go

@@ -15,7 +15,7 @@ func String(x int) string {
 }
 
 func TestNameList(t *testing.T) {
-	list := NewNameList(memStore, 7)
+	list := newNameList(memStore, 7)
 
 	for i := 0; i < maxNameCount; i++ {
 		list.WriteName(String(i))
@@ -51,7 +51,7 @@ func TestNameList(t *testing.T) {
 	}
 
 	// randomized deletion
-	list = NewNameList(memStore, 7)
+	list = newNameList(memStore, 7)
 	// Delete elements at random positions in the list.
 	rList := rand.Perm(maxN)
 	for _, i := range rList {

weed/util/skiplist/skiplist.go

@@ -22,6 +22,7 @@ type SkipList struct {
 	maxNewLevel int
 	maxLevel    int
 	listStore   ListStore
+	hasChanges  bool
 	// elementCount int
 }
 
@@ -93,6 +94,9 @@ func (t *SkipList) findExtended(key []byte, findGreaterOrEqual bool) (prevElemen
 	if err != nil {
 		return
 	}
+	if currentNode == nil {
+		return
+	}
 
 	// In case, that our first element is already greater-or-equal!
 	if findGreaterOrEqual && compareElement(currentNode, key) > 0 {
@@ -115,6 +119,9 @@ func (t *SkipList) findExtended(key []byte, findGreaterOrEqual bool) (prevElemen
 			if err != nil {
 				return
 			}
+			if currentNode == nil {
+				return
+			}
 		} else {
 			if index > 0 {
 
@@ -126,6 +133,9 @@ func (t *SkipList) findExtended(key []byte, findGreaterOrEqual bool) (prevElemen
 					if err != nil {
 						return
 					}
+					if currentNodeNext == nil {
+						return
+					}
 					foundElem = currentNodeNext
 					ok = true
 					return
@@ -216,11 +226,13 @@ func (t *SkipList) Delete(key []byte) (err error) {
 					if err != nil {
 						return err
 					}
+					if nextNextNode != nil {
 						nextNextNode.Prev = currentNode.Reference()
 						if err = t.saveElement(nextNextNode); err != nil {
 							return err
 						}
 					}
+				}
 				// t.elementCount--
 				if err = t.deleteElement(nextNode); err != nil {
 					return err
@@ -230,6 +242,7 @@ func (t *SkipList) Delete(key []byte) (err error) {
 			// Link from start needs readjustments.
 			startNextKey := t.startLevels[index].Key
 			if compareElement(nextNode, startNextKey) == 0 {
+				t.hasChanges = true
 				t.startLevels[index] = nextNode.Next[index]
 				// This was our currently highest node!
 				if t.startLevels[index] == nil {
@@ -240,6 +253,7 @@ func (t *SkipList) Delete(key []byte) (err error) {
 			// Link from end needs readjustments.
 			if nextNode.Next[index] == nil {
 				t.endLevels[index] = currentNode.Reference()
+				t.hasChanges = true
 			}
 			nextNode.Next[index] = nil
 		}
@@ -272,6 +286,7 @@ func (t *SkipList) Insert(key, value []byte) (err error){
 	if level > t.maxLevel {
 		level = t.maxLevel + 1
 		t.maxLevel = level
+		t.hasChanges = true
 	}
 
 	elem := &SkipListElement{
@@ -326,6 +341,7 @@ func (t *SkipList) Insert(key, value []byte) (err error){
 						if nextNode, err = t.loadElement(nextNodeRef); err != nil {
 							return
 						}
+						if nextNode != nil {
 							nextNode.Prev = elem.Reference()
 							if err = t.saveElement(nextNode); err != nil {
 								return
@@ -333,6 +349,7 @@ func (t *SkipList) Insert(key, value []byte) (err error){
 						}
 					}
 				}
+			}
 
 			if nextNodeRef != nil && bytes.Compare(nextNodeRef.Key, key) <= 0 {
 				// Go right
@@ -343,6 +360,9 @@ func (t *SkipList) Insert(key, value []byte) (err error){
 					}
 				}
 				currentNode = nextNode
+				if currentNode == nil {
+					return
+				}
 			} else {
 				// Go down
 				index--
@@ -366,18 +386,22 @@ func (t *SkipList) Insert(key, value []byte) (err error){
 					if err != nil {
 						return err
 					}
+					if startLevelElement != nil {
 						startLevelElement.Prev = elem.Reference()
 						if err = t.saveElement(startLevelElement); err != nil {
 							return err
 						}
 					}
+				}
 				elem.Next[i] = t.startLevels[i]
 				t.startLevels[i] = elem.Reference()
+				t.hasChanges = true
 			}
 
 			// link the endLevels to this element!
 			if elem.Next[i] == nil {
 				t.endLevels[i] = elem.Reference()
+				t.hasChanges = true
 			}
 
 			didSomething = true
@@ -392,20 +416,24 @@ func (t *SkipList) Insert(key, value []byte) (err error){
 					if err != nil {
 						return err
 					}
+					if endLevelElement != nil {
 						endLevelElement.Next[i] = elem.Reference()
 						if err = t.saveElement(endLevelElement); err != nil {
 							return err
 						}
 					}
+				}
 				if i == 0 {
 					elem.Prev = t.endLevels[i]
 				}
 				t.endLevels[i] = elem.Reference()
+				t.hasChanges = true
 			}
 
 			// Link the startLevels to this element!
 			if t.startLevels[i] == nil || bytes.Compare(t.startLevels[i].Key, key) > 0 {
 				t.startLevels[i] = elem.Reference()
+				t.hasChanges = true
 			}
 
 			didSomething = true
@@ -486,6 +514,9 @@ func (t *SkipList) println() {
 	for nodeRef != nil {
 		print(fmt.Sprintf("%v: ", string(nodeRef.Key)))
 		node, _ := t.loadElement(nodeRef)
+		if node == nil {
+			break
+		}
 		for i := 0; i <= int(node.Level); i++ {
 
 			l := node.Next[i]
@@ -510,8 +541,8 @@ func (t *SkipList) println() {
 			}
 
 		}
-		println()
 		nodeRef = node.Next[0]
+		println()
 	}
 
 	print("end --> ")