diff --git a/cluster.go b/cluster.go
index a3f0721..db8c45c 100644
--- a/cluster.go
+++ b/cluster.go
@@ -81,12 +81,12 @@ func InitCluster(ctx context.Context, red redis.UniversalClient, keyPrefix strin
 		logger:         op.logger,
 		keyPrefix:      keyPrefix,
 		location:       op.location,
-		lockKey:        "timer:cluster_globalLockKey" + keyPrefix,  // 定时器的全局锁
-		zsetKey:        "timer:cluster_zsetKey" + keyPrefix,        // 有序集合
-		listKey:        "timer:cluster_listKey" + keyPrefix,        // 列表
-		setKey:         "timer:cluster_setKey" + keyPrefix,         // 重入集合
-		priorityKey:    "timer:cluster_priorityKey" + keyPrefix,    // 全局优先级的key
-		executeInfoKey: "timer:cluster_executeInfoKey" + keyPrefix, // 执行情况的key 有序集合
+		lockKey:        fmt.Sprintf("timer:{%s}:cluster_lock", keyPrefix),
+		zsetKey:        fmt.Sprintf("timer:{%s}:cluster_zset", keyPrefix),
+		listKey:        fmt.Sprintf("timer:{%s}:cluster_list", keyPrefix),
+		setKey:         fmt.Sprintf("timer:{%s}:cluster_set", keyPrefix),
+		priorityKey:    fmt.Sprintf("timer:{%s}:cluster_priority", keyPrefix),
+		executeInfoKey: fmt.Sprintf("timer:{%s}:cluster_execinfo", keyPrefix),
 		usePriority:    false,
 		stopChan:       make(chan struct{}),
 		instanceId:     U.String(),
@@ -462,10 +462,10 @@ func (l *Cluster) calculateNextTimes() {
 		// 使用Lua脚本原子性添加任务
 		script := `
 			local zsetKey = KEYS[1]
+			local lockKey = KEYS[2]
 			local score = ARGV[1]
 			local taskID = ARGV[2]
 			local expireTime = ARGV[3]
-			local lockKey = ARGV[4]
 
 			-- 检查是否已存在
 			local existing = redis.call('zscore', zsetKey, taskID)
@@ -483,9 +483,9 @@ func (l *Cluster) calculateNextTimes() {
 			return 1
 			`
 
-		lockKey := fmt.Sprintf("%s_%s_%d", l.keyPrefix, val.TaskId, nextTime.UnixMilli())
-		_, err = pipe.Eval(l.ctx, script, []string{l.zsetKey},
-			nextTime.UnixMilli(), val.TaskId, 60, lockKey).Result()
+		lockKey := fmt.Sprintf("timer:{%s}:cluster_calc_lock:%s:%d", l.keyPrefix, val.TaskId, nextTime.UnixMilli())
+		_, err = pipe.Eval(l.ctx, script, []string{l.zsetKey, lockKey},
+			nextTime.UnixMilli(), val.TaskId, 60).Result()
 		if err != nil {
 			l.logger.Errorf(l.ctx, "Failed to schedule task: %v", err)
 		}
diff --git a/cluster_test.go b/cluster_test.go
index e42ef0d..9400566 100644
--- a/cluster_test.go
+++ b/cluster_test.go
@@ -3,6 +3,7 @@ package timerx_test
 import (
 	"context"
 	"fmt"
+	"strings"
 	"testing"
 	"time"
 
@@ -182,3 +183,80 @@ func TestCluster_Add(t *testing.T) {
 
 	// TODO: verify the job is added to the cluster and can be executed after the specified duration
 }
+
+func TestClusterKeyFormat(t *testing.T) {
+	keyPrefix := "testcluster"
+
+	tests := []struct {
+		name      string
+		key       string
+		hashTag   string
+		hasPrefix string
+	}{
+		{"zsetKey", "timer:{testcluster}:cluster_zset", "{testcluster}", "timer:"},
+		{"listKey", "timer:{testcluster}:cluster_list", "{testcluster}", "timer:"},
+		{"lockKey", "timer:{testcluster}:cluster_lock", "{testcluster}", "timer:"},
+		{"execInfoKey", "timer:{testcluster}:cluster_execinfo", "{testcluster}", "timer:"},
+		{"priorityKey", "timer:{testcluster}:cluster_priority", "{testcluster}", "timer:"},
+		{"calcLockKey", "timer:{testcluster}:cluster_calc_lock:task1:1234567890", "{testcluster}", "timer:"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.key == "" || tt.key == " " {
+				t.Error("key should not be empty")
+			}
+			t.Logf("key format: %s", tt.key)
+		})
+	}
+
+	_ = keyPrefix
+}
+
+func TestClusterZsetListKeysSameHashTag(t *testing.T) {
+	zsetKey := "timer:{myapp}:cluster_zset"
+	listKey := "timer:{myapp}:cluster_list"
+
+	zsetTag := extractHashTag(zsetKey)
+	listTag := extractHashTag(listKey)
+
+	if zsetTag != listTag {
+		t.Errorf("zset and list keys must share same hash tag: %q != %q", zsetTag, listTag)
+	}
+	if zsetTag != "myapp" {
+		t.Errorf("unexpected hash tag: %q", zsetTag)
+	}
+}
+
+func extractHashTag(key string) string {
+	start := strings.Index(key, "{")
+	end := strings.Index(key, "}")
+	if start >= 0 && end > start {
+		return key[start+1 : end]
+	}
+	return ""
+}
+
+func TestClusterMultiKeyLuaKeysShareSlot(t *testing.T) {
+	type keyPair struct {
+		key1 string
+		key2 string
+		name string
+	}
+
+	pairs := []keyPair{
+		{"timer:{app}:cluster_zset", "timer:{app}:cluster_list", "zset+list"},
+		{"timer:{app}:cluster_zset", "timer:{app}:cluster_calc_lock:task1:9999", "zset+calc_lock"},
+	}
+
+	for _, p := range pairs {
+		t.Run(p.name, func(t *testing.T) {
+			t1 := extractHashTag(p.key1)
+			t2 := extractHashTag(p.key2)
+			if t1 != t2 {
+				t.Errorf("keys in multi-key Lua script must share same hash tag: %q != %q (%s, %s)",
+					t1, t2, p.key1, p.key2)
+			}
+		})
+	}
+}
diff --git a/example/cluster_redis/main.go b/example/cluster_redis/main.go
new file mode 100644
index 0000000..46174b1
--- /dev/null
+++ b/example/cluster_redis/main.go
@@ -0,0 +1,57 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+	"github.com/yuninks/timerx"
+)
+
+func main() {
+	ctx := context.Background()
+
+	client := getClusterRedis()
+
+	clu, err := timerx.InitCluster(ctx, client, "cluster_redis_example")
+	if err != nil {
+		panic(err)
+	}
+	defer clu.Stop()
+
+	err = clu.EverySpace(ctx, "cluster_every_second", 1*time.Second, clusterCallback, "cluster每秒任务")
+	fmt.Println("EverySpace:", err)
+
+	err = clu.EveryMinute(ctx, "cluster_every_minute", 30, clusterCallback, "cluster每分钟任务")
+	fmt.Println("EveryMinute:", err)
+
+	err = clu.EveryDay(ctx, "cluster_every_day", 0, 0, 0, clusterCallback, "cluster每天任务")
+	fmt.Println("EveryDay:", err)
+
+	err = clu.Cron(ctx, "cluster_cron_second", "*/5 * * * * ?", clusterCallback, "cluster cron任务",
+		timerx.WithCronParserSecond())
+	fmt.Println("Cron:", err)
+
+	select {}
+}
+
+func getClusterRedis() *redis.ClusterClient {
+	client := redis.NewClusterClient(&redis.ClusterOptions{
+		Addrs: []string{
+			"127.0.0.1:6379",
+			"127.0.0.1:6380",
+			"127.0.0.1:6381",
+		},
+		Password: "",
+	})
+	if client == nil {
+		panic("redis cluster init error")
+	}
+	return client
+}
+
+func clusterCallback(ctx context.Context, extendData any) error {
+	fmt.Println("cluster任务执行:", extendData, "时间:", time.Now().Format("2006-01-02 15:04:05"))
+	return nil
+}
diff --git a/heartbeat/heartbeat.go b/heartbeat/heartbeat.go
index e9794db..e4330a1 100644
--- a/heartbeat/heartbeat.go
+++ b/heartbeat/heartbeat.go
@@ -3,6 +3,7 @@ package heartbeat
 import (
 	"context"
 	"errors"
+	"fmt"
 	"strconv"
 	"sync"
 	"time"
@@ -47,7 +48,7 @@ func InitHeartBeat(ctx context.Context, ref redis.UniversalClient, keyPrefix str
 		ctx:    ctx,
 		cancel: cancel,
 
-		heartbeatKey: "timer:heartbeat_key" + op.source + keyPrefix,
+		heartbeatKey: fmt.Sprintf("timer:{%s}:heartbeat_%s", keyPrefix, op.source),
 
 		priority:   op.priority,
 		redis:      ref,
diff --git a/leader/leader.go b/leader/leader.go
index 34144e2..eea2e12 100644
--- a/leader/leader.go
+++ b/leader/leader.go
@@ -5,6 +5,7 @@ package leader
 import (
 	"context"
 	"errors"
+	"fmt"
 	"sync"
 	"time"
 
@@ -52,8 +53,8 @@ func InitLeader(ctx context.Context, ref redis.UniversalClient, keyPrefix string
 		ctx:              ctx,
 		cancel:           cancel,
 		redis:            ref,
-		leaderUniLockKey: "timer:leader_lockKey" + op.source + keyPrefix,
-		leaderKey:        "timer:leader" + op.source + keyPrefix,
+		leaderUniLockKey: fmt.Sprintf("timer:{%s}:leader_lock_%s", keyPrefix, op.source),
+		leaderKey:        fmt.Sprintf("timer:{%s}:leader_%s", keyPrefix, op.source),
 		priority:         op.priority,
 		instanceId:       op.instanceId,
 		logger:           op.logger,
diff --git a/once.go b/once.go
index cb28ed1..eee2a04 100644
--- a/once.go
+++ b/once.go
@@ -114,10 +114,10 @@ func InitOnce(ctx context.Context, re redis.UniversalClient, keyPrefix string, c
 		ctx:              ctx,
 		cancel:           cancel,
 		logger:           op.logger,
-		zsetKey:          "timer:once_zsetkey" + keyPrefix,
-		listKey:          "timer:once_listkey" + keyPrefix,
-		executeInfoKey:   "timer:once_executeInfoKey" + keyPrefix,
-		globalLockPrefix: "timer:once_globalLockPrefix" + keyPrefix,
+		zsetKey:          fmt.Sprintf("timer:{%s}:once_zset", keyPrefix),
+		listKey:          fmt.Sprintf("timer:{%s}:once_list", keyPrefix),
+		executeInfoKey:   fmt.Sprintf("timer:{%s}:once_execinfo", keyPrefix),
+		globalLockPrefix: fmt.Sprintf("timer:{%s}:once_lock:", keyPrefix),
 		usePriority:      false,
 		redis:            re,
 		worker:           call,
@@ -418,7 +418,8 @@ func (w *Once) save(ctx context.Context, jobType jobType, taskType OnceTaskType,
 
 	dataExpire := time.Until(expiresTime)
 
-	pipe.SetEx(w.ctx, w.keyPrefix+redisKey, b, dataExpire)
+	dataKey := fmt.Sprintf("timer:{%s}:once_data:%s", w.keyPrefix, redisKey)
+	pipe.SetEx(w.ctx, dataKey, b, dataExpire)
 	pipe.ZAdd(w.ctx, w.zsetKey, redis.Z{
 		Score:  float64(nextTime.UnixMilli()),
 		Member: redisKey,
@@ -492,9 +493,10 @@ func (l *Once) create(ctx context.Context, source createSource, jobType jobType,
 // 删除任务
 func (w *Once) Delete(taskType OnceTaskType, taskId string) error {
 	redisKey := w.buildRedisKey(taskType, taskId)
+	dataKey := fmt.Sprintf("timer:{%s}:once_data:%s", w.keyPrefix, redisKey)
 
 	pipe := w.redis.TxPipeline()
-	pipe.Del(w.ctx, redisKey)
+	pipe.Del(w.ctx, dataKey)
 	pipe.ZRem(w.ctx, w.zsetKey, redisKey)
 
 	_, err := pipe.Exec(w.ctx)
@@ -587,8 +589,8 @@ func (l *Once) processTask(key string) {
 	}()
 
 	// 读取数据
-	redisKey := l.keyPrefix + l.buildRedisKey(taskType, taskId)
-	str, err := l.redis.Get(ctx, redisKey).Result()
+	dataKey := fmt.Sprintf("timer:{%s}:once_data:%s", l.keyPrefix, l.buildRedisKey(taskType, taskId))
+	str, err := l.redis.Get(ctx, dataKey).Result()
 	if err != nil {
 		l.logger.Errorf(ctx, "processTask redis.Get key:%s err:%s", key, err)
 		return
diff --git a/once_test.go b/once_test.go
index 3243778..3c92e0f 100644
--- a/once_test.go
+++ b/once_test.go
@@ -1,7 +1,148 @@
 package timerx
 
-import "testing"
+import (
+	"strings"
+	"testing"
+	"time"
 
-func Test2(t *testing.T) {
+	"github.com/yuninks/timerx/logger"
+)
 
+func TestOnceBuildRedisKey(t *testing.T) {
+	once := &Once{keySeparator: "[:]", keyPrefix: "test_prefix"}
+
+	key := once.buildRedisKey("normal", "task123")
+	if key != "normal[:]task123" {
+		t.Errorf("unexpected key: %s", key)
+	}
+}
+
+func TestOnceParseRedisKey(t *testing.T) {
+	once := &Once{keySeparator: "[:]"}
+
+	taskType, taskId, err := once.parseRedisKey("normal[:]task123")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if taskType != "normal" {
+		t.Errorf("unexpected taskType: %s", taskType)
+	}
+	if taskId != "task123" {
+		t.Errorf("unexpected taskId: %s", taskId)
+	}
+
+	_, _, err = once.parseRedisKey("invalid")
+	if err == nil {
+		t.Error("expected error for invalid key")
+	}
+}
+
+func TestOnceKeyFormat(t *testing.T) {
+	keyPrefix := "testcluster"
+
+	tests := []struct {
+		name     string
+		key      string
+		contains string
+	}{
+		{"zsetKey contains hash tag", "timer:{testcluster}:once_zset", "{testcluster}"},
+		{"listKey contains hash tag", "timer:{testcluster}:once_list", "{testcluster}"},
+		{"execinfoKey contains hash tag", "timer:{testcluster}:once_execinfo", "{testcluster}"},
+		{"lockPrefix contains hash tag", "timer:{testcluster}:once_lock:", "{testcluster}"},
+		{"dataKey contains hash tag", "timer:{testcluster}:once_data:normal[:]task1", "{testcluster}"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if !strings.Contains(tt.key, tt.contains) {
+				t.Errorf("key %q does not contain hash tag %q", tt.key, tt.contains)
+			}
+		})
+	}
+
+	_ = keyPrefix
+}
+
+func TestOnceDataKeyFormat(t *testing.T) {
+	dataKey := "timer:{myapp}:once_data:normal[:]task1"
+
+	if !strings.Contains(dataKey, "{myapp}") {
+		t.Errorf("data key %q missing hash tag {myapp}", dataKey)
+	}
+	if !strings.HasPrefix(dataKey, "timer:") {
+		t.Errorf("data key %q missing timer: prefix", dataKey)
+	}
+}
+
+func TestOnceExtendData(t *testing.T) {
+	taskTimes := []time.Time{
+		time.Now().Add(10 * time.Second),
+		time.Now().Add(5 * time.Second),
+		time.Now().Add(15 * time.Second),
+	}
+
+	ed := extendData{
+		TaskTimes: taskTimes,
+		Data:      "test data",
+		RunCount:  0,
+		JobType:   jobTypeOnce,
+	}
+
+	if len(ed.TaskTimes) != 3 {
+		t.Errorf("expected 3 task times, got %d", len(ed.TaskTimes))
+	}
+	if ed.Data != "test data" {
+		t.Errorf("unexpected data: %v", ed.Data)
+	}
+	if ed.RunCount != 0 {
+		t.Errorf("unexpected runCount: %d", ed.RunCount)
+	}
+}
+
+func TestOnceSaveValidation(t *testing.T) {
+	var once Once
+
+	once = Once{keyPrefix: "test_app", keySeparator: "[:]"}
+
+	if once.keySeparator != "[:]" {
+		t.Errorf("unexpected keySeparator: %s", once.keySeparator)
+	}
+	if once.keyPrefix != "test_app" {
+		t.Errorf("unexpected keyPrefix: %s", once.keyPrefix)
+	}
+}
+
+func TestOnceKeyPrefixConsistency(t *testing.T) {
+	keyPrefix := "myapp_v2"
+
+	zsetKey := "timer:{myapp_v2}:once_zset"
+	listKey := "timer:{myapp_v2}:once_list"
+	dataKey := "timer:{myapp_v2}:once_data:urgent[:]task99"
+
+	for _, k := range []string{zsetKey, listKey, dataKey} {
+		if !strings.Contains(k, "{"+keyPrefix+"}") {
+			t.Errorf("key %q missing hash tag for keyPrefix %q", k, keyPrefix)
+		}
+	}
+
+	zsetHash := extractHashTagForOnce(zsetKey)
+	listHash := extractHashTagForOnce(listKey)
+	dataHash := extractHashTagForOnce(dataKey)
+
+	if zsetHash != listHash || listHash != dataHash {
+		t.Errorf("all Once keys must share same hash tag: %q %q %q", zsetHash, listHash, dataHash)
+	}
+}
+
+func extractHashTagForOnce(key string) string {
+	start := strings.Index(key, "{")
+	end := strings.Index(key, "}")
+	if start >= 0 && end > start {
+		return key[start+1 : end]
+	}
+	return ""
+}
+
+func newDefaultLoggerForTest() logger.Logger {
+	return logger.NewLogger()
 }
diff --git a/priority/priority.go b/priority/priority.go
index baa4484..80f360d 100644
--- a/priority/priority.go
+++ b/priority/priority.go
@@ -50,7 +50,7 @@ func InitPriority(ctx context.Context, re redis.UniversalClient, keyPrefix strin
 		priority:    priority,
 		redis:       re,
 		logger:      conf.logger,
-		redisKey:    "timer:priority_" + conf.source + keyPrefix,
+		redisKey:    fmt.Sprintf("timer:{%s}:priority_%s", keyPrefix, conf.source),
 		expireTime:  conf.expireTime,
 		setInterval: conf.updateInterval,
 		getInterval: conf.getInterval,
diff --git a/priority/priority_test.go b/priority/priority_test.go
index ad4831c..a8e56dc 100644
--- a/priority/priority_test.go
+++ b/priority/priority_test.go
@@ -131,8 +131,8 @@ func TestSetPriorityScenarios(t *testing.T) {
 	ctx := context.Background()
 
 	redisConn := getRedis()
-	// 删除Key
-	redisConn.Del(ctx, "timer:priority_test22")
+	// 删除Key (new key format with hash tag)
+	redisConn.Del(ctx, "timer:{test22}:priority_")
 
 	for _, tc := range testCases {
 		t.Run(tc.name, func(t *testing.T) {
@@ -197,7 +197,7 @@ func TestErrorScenarios(t *testing.T) {
 
 		priority := &Priority{
 			redis:    getRedis(),
-			redisKey: "timer:priority_test",
+			redisKey: "timer:{test}:priority_",
 			priority: 100,
 			ctx:      ctx,
 		}