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-rw-r--r--other/java/client/src/main/proto/filer.proto2
-rw-r--r--weed/cluster/lock_manager/distributed_lock_manager.go50
-rw-r--r--weed/cluster/lock_manager/lock_manager.go50
-rw-r--r--weed/pb/filer.proto2
-rw-r--r--weed/pb/filer_pb/filer.pb.go278
-rw-r--r--weed/server/filer_grpc_server_dlm.go46
-rw-r--r--weed/server/filer_server.go4
7 files changed, 236 insertions, 196 deletions
diff --git a/other/java/client/src/main/proto/filer.proto b/other/java/client/src/main/proto/filer.proto
index 3dda002c5..bd4916ddc 100644
--- a/other/java/client/src/main/proto/filer.proto
+++ b/other/java/client/src/main/proto/filer.proto
@@ -460,7 +460,7 @@ message UnlockResponse {
message Lock {
string name = 1;
string renew_token = 2;
- int64 expiration_ns = 3;
+ int64 expired_at_ns = 3;
}
message TransferLocksRequest {
repeated Lock locks = 1;
diff --git a/weed/cluster/lock_manager/distributed_lock_manager.go b/weed/cluster/lock_manager/distributed_lock_manager.go
new file mode 100644
index 000000000..0bcc7b02d
--- /dev/null
+++ b/weed/cluster/lock_manager/distributed_lock_manager.go
@@ -0,0 +1,50 @@
+package lock_manager
+
+import (
+ "github.com/seaweedfs/seaweedfs/weed/pb"
+)
+
+type DistributedLockManager struct {
+ lockManager *LockManager
+}
+
+func NewDistributedLockManager() *DistributedLockManager {
+ return &DistributedLockManager{
+ lockManager: NewLockManager(),
+ }
+}
+
+func (dlm *DistributedLockManager) Lock(host pb.ServerAddress, key string, expiredAtNs int64, token string, servers []pb.ServerAddress) (renewToken string, movedTo pb.ServerAddress, err error) {
+ server := HashKeyToServer(key, servers)
+ if server != host {
+ movedTo = server
+ return
+ }
+ renewToken, err = dlm.lockManager.Lock(key, expiredAtNs, token)
+ return
+}
+
+func (dlm *DistributedLockManager) Unlock(host pb.ServerAddress, key string, token string, servers []pb.ServerAddress) (movedTo pb.ServerAddress, err error) {
+ server := HashKeyToServer(key, servers)
+ if server != host {
+ movedTo = server
+ return
+ }
+ _, err = dlm.lockManager.Unlock(key, token)
+ return
+}
+
+// InsertLock is used to insert a lock to a server unconditionally
+// It is used when a server is down and the lock is moved to another server
+func (dlm *DistributedLockManager) InsertLock(key string, expiredAtNs int64, token string) {
+ dlm.lockManager.InsertLock(key, expiredAtNs, token)
+}
+func (dlm *DistributedLockManager) SelectNotOwnedLocks(host pb.ServerAddress, servers []pb.ServerAddress) (locks []*Lock) {
+ return dlm.lockManager.SelectLocks(func(key string) bool {
+ server := HashKeyToServer(key, servers)
+ return server != host
+ })
+}
+func (dlm *DistributedLockManager) CalculateTargetServer(key string, servers []pb.ServerAddress) pb.ServerAddress {
+ return HashKeyToServer(key, servers)
+}
diff --git a/weed/cluster/lock_manager/lock_manager.go b/weed/cluster/lock_manager/lock_manager.go
index 01dc58810..642c77772 100644
--- a/weed/cluster/lock_manager/lock_manager.go
+++ b/weed/cluster/lock_manager/lock_manager.go
@@ -12,9 +12,9 @@ type LockManager struct {
locks *xsync.MapOf[string, *Lock]
}
type Lock struct {
- Token string
- ExpirationNs int64
- Key string // only used for moving locks
+ Token string
+ ExpiredAtNs int64
+ Key string // only used for moving locks
}
func NewLockManager() *LockManager {
@@ -25,32 +25,37 @@ func NewLockManager() *LockManager {
return t
}
-func (lm *LockManager) Lock(path string, ttlDuration time.Duration, token string) (renewToken string, err error) {
+func (lm *LockManager) Lock(path string, expiredAtNs int64, token string) (renewToken string, err error) {
lm.locks.Compute(path, func(oldValue *Lock, loaded bool) (newValue *Lock, delete bool) {
if oldValue != nil {
- now := time.Now()
- if oldValue.ExpirationNs > 0 && oldValue.ExpirationNs < now.UnixNano() {
+ if oldValue.ExpiredAtNs > 0 && oldValue.ExpiredAtNs < time.Now().UnixNano() {
// lock is expired, set to a new lock
- expirationNs := time.Now().Add(ttlDuration).UnixNano()
- return &Lock{Token: token, ExpirationNs: expirationNs}, false
+ if token != "" {
+ err = fmt.Errorf("lock: non-empty token on an expired lock")
+ return nil, false
+ } else {
+ // new lock
+ renewToken = uuid.New().String()
+ return &Lock{Token: renewToken, ExpiredAtNs: expiredAtNs}, false
+ }
}
+ // not expired
if oldValue.Token == token {
- expirationNs := time.Now().Add(ttlDuration).UnixNano()
- return &Lock{Token: token, ExpirationNs: expirationNs}, false
+ // token matches, renew the lock
+ return &Lock{Token: token, ExpiredAtNs: expiredAtNs}, false
} else {
err = fmt.Errorf("lock: token mismatch")
return oldValue, false
}
} else {
- expirationNs := time.Now().Add(ttlDuration).UnixNano()
if token == "" {
+ // new lock
renewToken = uuid.New().String()
- return &Lock{Token: renewToken, ExpirationNs: expirationNs}, false
+ return &Lock{Token: renewToken, ExpiredAtNs: expiredAtNs}, false
} else {
err = fmt.Errorf("lock: non-empty token on a new lock")
return nil, false
}
- return &Lock{Token: token, ExpirationNs: expirationNs}, false
}
})
return
@@ -60,13 +65,13 @@ func (lm *LockManager) Unlock(path string, token string) (isUnlocked bool, err e
lm.locks.Compute(path, func(oldValue *Lock, loaded bool) (newValue *Lock, delete bool) {
if oldValue != nil {
now := time.Now()
- if oldValue.ExpirationNs > 0 && oldValue.ExpirationNs < now.UnixNano() {
+ if oldValue.ExpiredAtNs > 0 && oldValue.ExpiredAtNs < now.UnixNano() {
// lock is expired, delete it
isUnlocked = true
return nil, true
}
if oldValue.Token == token {
- if oldValue.ExpirationNs <= now.UnixNano() {
+ if oldValue.ExpiredAtNs <= now.UnixNano() {
isUnlocked = true
return nil, true
}
@@ -89,7 +94,7 @@ func (lm *LockManager) CleanUp() {
time.Sleep(1 * time.Minute)
now := time.Now().UnixNano()
lm.locks.Range(func(key string, value *Lock) bool {
- if now > value.ExpirationNs {
+ if now > value.ExpiredAtNs {
lm.locks.Delete(key)
return true
}
@@ -98,16 +103,16 @@ func (lm *LockManager) CleanUp() {
}
}
-// TakeOutLocksByKey takes out locks by key
+// SelectLocks takes out locks by key
// if keyFn return true, the lock will be taken out
-func (lm *LockManager) TakeOutLocksByKey(keyFn func(key string) bool) (locks []*Lock) {
+func (lm *LockManager) SelectLocks(selectFn func(key string) bool) (locks []*Lock) {
now := time.Now().UnixNano()
lm.locks.Range(func(key string, lock *Lock) bool {
- if now > lock.ExpirationNs {
+ if now > lock.ExpiredAtNs {
lm.locks.Delete(key)
return true
}
- if keyFn(key) {
+ if selectFn(key) {
lm.locks.Delete(key)
lock.Key = key
locks = append(locks, lock)
@@ -116,3 +121,8 @@ func (lm *LockManager) TakeOutLocksByKey(keyFn func(key string) bool) (locks []*
})
return
}
+
+// InsertLock inserts a lock unconditionally
+func (lm *LockManager) InsertLock(path string, expiredAtNs int64, token string) {
+ lm.locks.Store(path, &Lock{Token: token, ExpiredAtNs: expiredAtNs})
+}
diff --git a/weed/pb/filer.proto b/weed/pb/filer.proto
index 3dda002c5..bd4916ddc 100644
--- a/weed/pb/filer.proto
+++ b/weed/pb/filer.proto
@@ -460,7 +460,7 @@ message UnlockResponse {
message Lock {
string name = 1;
string renew_token = 2;
- int64 expiration_ns = 3;
+ int64 expired_at_ns = 3;
}
message TransferLocksRequest {
repeated Lock locks = 1;
diff --git a/weed/pb/filer_pb/filer.pb.go b/weed/pb/filer_pb/filer.pb.go
index b14c7c4f4..58d6c9287 100644
--- a/weed/pb/filer_pb/filer.pb.go
+++ b/weed/pb/filer_pb/filer.pb.go
@@ -3853,9 +3853,9 @@ type Lock struct {
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
- Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
- RenewToken string `protobuf:"bytes,2,opt,name=renew_token,json=renewToken,proto3" json:"renew_token,omitempty"`
- ExpirationNs int64 `protobuf:"varint,3,opt,name=expiration_ns,json=expirationNs,proto3" json:"expiration_ns,omitempty"`
+ Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+ RenewToken string `protobuf:"bytes,2,opt,name=renew_token,json=renewToken,proto3" json:"renew_token,omitempty"`
+ ExpiredAtNs int64 `protobuf:"varint,3,opt,name=expired_at_ns,json=expiredAtNs,proto3" json:"expired_at_ns,omitempty"`
}
func (x *Lock) Reset() {
@@ -3904,9 +3904,9 @@ func (x *Lock) GetRenewToken() string {
return ""
}
-func (x *Lock) GetExpirationNs() int64 {
+func (x *Lock) GetExpiredAtNs() int64 {
if x != nil {
- return x.ExpirationNs
+ return x.ExpiredAtNs
}
return 0
}
@@ -4694,146 +4694,146 @@ var file_filer_proto_rawDesc = []byte{
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var (
diff --git a/weed/server/filer_grpc_server_dlm.go b/weed/server/filer_grpc_server_dlm.go
index fdd299947..6618285e0 100644
--- a/weed/server/filer_grpc_server_dlm.go
+++ b/weed/server/filer_grpc_server_dlm.go
@@ -3,7 +3,6 @@ package weed_server
import (
"context"
"fmt"
- "github.com/seaweedfs/seaweedfs/weed/cluster/lock_manager"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/pb"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
@@ -18,21 +17,17 @@ func (fs *FilerServer) Lock(ctx context.Context, req *filer_pb.LockRequest) (res
if snapshot == nil {
resp.Error = "no lock server found"
return
- } else {
- server := lock_manager.HashKeyToServer(req.Name, snapshot)
- if server != fs.option.Host {
- resp.Error = fmt.Sprintf("not the lock server for %s", req.Name)
- resp.MovedTo = string(server)
- return
- }
}
- renewToken, err := fs.dlm.Lock(req.Name, time.Duration(req.SecondsToLock)*time.Second, req.PreviousLockToken)
+ var movedTo pb.ServerAddress
+ expiredAtNs := time.Now().Add(time.Duration(req.SecondsToLock) * time.Second).UnixNano()
+ resp.RenewToken, movedTo, err = fs.dlm.Lock(fs.option.Host, req.Name, expiredAtNs, req.PreviousLockToken, snapshot)
if err != nil {
resp.Error = fmt.Sprintf("%v", err)
- } else {
- resp.RenewToken = renewToken
+ }
+ if movedTo != "" {
+ resp.MovedTo = string(movedTo)
}
return resp, nil
@@ -46,16 +41,9 @@ func (fs *FilerServer) Unlock(ctx context.Context, req *filer_pb.UnlockRequest)
if snapshot == nil {
resp.Error = "no lock server found"
return
- } else {
- server := lock_manager.HashKeyToServer(req.Name, snapshot)
- if server != fs.option.Host {
- resp.Error = fmt.Sprintf("not the lock server for %s", req.Name)
- resp.MovedTo = string(server)
- return
- }
}
- _, err = fs.dlm.Unlock(req.Name, req.LockToken)
+ _, err = fs.dlm.Unlock(fs.option.Host, req.Name, req.LockToken, snapshot)
if err != nil {
resp.Error = fmt.Sprintf("%v", err)
}
@@ -67,13 +55,8 @@ func (fs *FilerServer) Unlock(ctx context.Context, req *filer_pb.UnlockRequest)
// TransferLocks is a grpc handler to handle FilerServer's TransferLocksRequest
func (fs *FilerServer) TransferLocks(ctx context.Context, req *filer_pb.TransferLocksRequest) (*filer_pb.TransferLocksResponse, error) {
- now := time.Now()
for _, lock := range req.Locks {
- duration := time.Duration(lock.ExpirationNs - now.UnixNano())
- if _, err := fs.dlm.Lock(lock.Name, duration, lock.RenewToken); err != nil {
- glog.Errorf("receive transferred lock %v to %v: %v", lock.Name, fs.option.Host, err)
- return nil, err
- }
+ fs.dlm.InsertLock(lock.Name, lock.ExpiredAtNs, lock.RenewToken)
}
return &filer_pb.TransferLocksResponse{}, nil
@@ -81,23 +64,20 @@ func (fs *FilerServer) TransferLocks(ctx context.Context, req *filer_pb.Transfer
}
func (fs *FilerServer) OnDlmChangeSnapshot(snapshot []pb.ServerAddress) {
- locks := fs.dlm.TakeOutLocksByKey(func(key string) bool {
- server := lock_manager.HashKeyToServer(key, snapshot)
- return server != fs.option.Host
- })
+ locks := fs.dlm.SelectNotOwnedLocks(fs.option.Host, snapshot)
if len(locks) == 0 {
return
}
for _, lock := range locks {
- server := lock_manager.HashKeyToServer(lock.Key, snapshot)
+ server := fs.dlm.CalculateTargetServer(lock.Key, snapshot)
if err := pb.WithFilerClient(false, 0, server, fs.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
_, err := client.TransferLocks(context.Background(), &filer_pb.TransferLocksRequest{
Locks: []*filer_pb.Lock{
{
- Name: lock.Key,
- RenewToken: lock.Token,
- ExpirationNs: lock.ExpirationNs,
+ Name: lock.Key,
+ RenewToken: lock.Token,
+ ExpiredAtNs: lock.ExpiredAtNs,
},
},
})
diff --git a/weed/server/filer_server.go b/weed/server/filer_server.go
index e22dfd737..adb1dd85b 100644
--- a/weed/server/filer_server.go
+++ b/weed/server/filer_server.go
@@ -97,7 +97,7 @@ type FilerServer struct {
knownListeners map[int32]int32
// distributed lock manager
- dlm *lock_manager.LockManager
+ dlm *lock_manager.DistributedLockManager
}
func NewFilerServer(defaultMux, readonlyMux *http.ServeMux, option *FilerOption) (fs *FilerServer, err error) {
@@ -185,7 +185,7 @@ func NewFilerServer(defaultMux, readonlyMux *http.ServeMux, option *FilerOption)
fs.filer.Shutdown()
})
- fs.dlm = lock_manager.NewLockManager()
+ fs.dlm = lock_manager.NewDistributedLockManager()
fs.filer.LockRing.SetTakeSnapshotCallback(fs.OnDlmChangeSnapshot)
return fs, nil
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-20 23:40:36 +0000