diff --git a/config/config.go b/config/config.go
index 828bd2b..8500d22 100644
--- a/config/config.go
+++ b/config/config.go
@@ -9,61 +9,20 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-const (
-	DefaultPoolName = "default"
-
-	minSecondaryStorageThresholdSeconds = 60 * 60
-)
-
-type SpannerConfig struct {
-	Project         string
-	Instance        string
-	Database        string
-	CredentialsFile string
-	TableName       string
-}
-
-func (spanner *SpannerConfig) validate() error {
-	if spanner == nil {
-		return nil
-	}
-	if spanner.Instance == "" || spanner.Project == "" || spanner.Database == "" || spanner.TableName == "" {
-		return errors.New("'Instance'/'Project'/'Database'/'TableName' should NOT be empty")
-	}
-	return nil
-}
-
-type SecondaryStorage struct {
-	Spanner *SpannerConfig
-	// max number of jobs that storage pumps per batch
-	MaxJobPumpBatchSize int64
-	// range from 0 to 1, when the redis memory usage is greater than this value,
-	// the storage won't pump jobs to redis anymore until the memory usage is lower than this value.
-	//
-	// Default is 1, means no limit
-	HighRedisMemoryWatermark float64
-}
-
-func (storage *SecondaryStorage) validate() error {
-	if storage.HighRedisMemoryWatermark < 0 || storage.HighRedisMemoryWatermark > 1 {
-		return fmt.Errorf("invalid HighRedisMemoryWatermark: %f, should be between 0 and 1", storage.HighRedisMemoryWatermark)
-	}
-	return storage.Spanner.validate()
-}
+const DefaultPoolName = "default"
 
 type Config struct {
-	Host             string
-	Port             int
-	AdminHost        string
-	AdminPort        int
-	LogLevel         string
-	LogDir           string
-	LogFormat        string
-	Accounts         map[string]string
-	EnableAccessLog  bool
-	AdminRedis       RedisConf
-	Pool             RedisPool
-	SecondaryStorage *SecondaryStorage
+	Host            string
+	Port            int
+	AdminHost       string
+	AdminPort       int
+	LogLevel        string
+	LogDir          string
+	LogFormat       string
+	Accounts        map[string]string
+	EnableAccessLog bool
+	AdminRedis      RedisConf
+	Pool            RedisPool
 
 	// Default publish params
 	TTLSecond   int
@@ -147,15 +106,5 @@ func MustLoad(path string) (*Config, error) {
 	if err != nil {
 		return nil, errors.New("invalid log level")
 	}
-
-	if conf.SecondaryStorage != nil {
-		if err := conf.SecondaryStorage.validate(); err != nil {
-			return nil, err
-		}
-		if conf.SecondaryStorage.HighRedisMemoryWatermark == 0 {
-			// default to 1
-			conf.SecondaryStorage.HighRedisMemoryWatermark = 1
-		}
-	}
 	return conf, nil
 }
diff --git a/config/config_test.go b/config/config_test.go
index e1cb661..019b5e5 100644
--- a/config/config_test.go
+++ b/config/config_test.go
@@ -2,19 +2,8 @@ package config
 
 import (
 	"testing"
-
-	"github.com/stretchr/testify/assert"
 )
 
-func TestSecondaryStorageConfig_Validate(t *testing.T) {
-	secondaryStorageConfig := SecondaryStorage{}
-	assert.Nil(t, secondaryStorageConfig.validate())
-	secondaryStorageConfig.Spanner = &SpannerConfig{}
-	assert.NotNil(t, secondaryStorageConfig.validate())
-	secondaryStorageConfig.Spanner = SpannerEmulator
-	assert.Nil(t, secondaryStorageConfig.validate())
-}
-
 func TestRedisConfig_Validate(t *testing.T) {
 	conf := &RedisConf{}
 	if err := conf.validate(); err == nil {
diff --git a/config/preset.go b/config/preset.go
index c4504f3..4523bf0 100644
--- a/config/preset.go
+++ b/config/preset.go
@@ -5,13 +5,6 @@ import (
 	"github.com/orlangure/gnomock/preset/redis"
 )
 
-var SpannerEmulator = &SpannerConfig{
-	Project:   "test-project",
-	Instance:  "test-instance",
-	Database:  "test-db",
-	TableName: "lmstfy_jobs",
-}
-
 type PresetConfigForTest struct {
 	*Config
 	containers []*gnomock.Container
@@ -25,9 +18,6 @@ func CreatePresetForTest(version string, pools ...string) (*PresetConfigForTest,
 		AdminPort: 7778,
 		LogLevel:  "INFO",
 		Pool:      make(map[string]RedisConf),
-		SecondaryStorage: &SecondaryStorage{
-			Spanner: SpannerEmulator,
-		},
 	}
 
 	p := redis.Preset()
@@ -38,7 +28,6 @@ func CreatePresetForTest(version string, pools ...string) (*PresetConfigForTest,
 	addr := defaultContainer.DefaultAddress()
 	cfg.AdminRedis.Addr = addr
 	cfg.Pool[DefaultPoolName] = RedisConf{Addr: addr, Version: version}
-	cfg.Pool["test-v2"] = RedisConf{Addr: addr, Version: "v2"}
 
 	containers := []*gnomock.Container{defaultContainer}
 	for _, extraPool := range pools {
diff --git a/engine/engine.go b/engine/engine.go
index 7e62a05..0613b04 100644
--- a/engine/engine.go
+++ b/engine/engine.go
@@ -1,12 +1,9 @@
 package engine
 
 import (
-	"errors"
 	"io"
 )
 
-var ErrJobExisted = errors.New("job existed")
-
 type Engine interface {
 	Publish(job Job) (jobID string, err error)
 	Consume(namespace string, queues []string, ttrSecond, timeoutSecond uint32) (job Job, err error)
diff --git a/engine/job.go b/engine/job.go
index d88dd01..0a11f00 100644
--- a/engine/job.go
+++ b/engine/job.go
@@ -25,17 +25,6 @@ type Job interface {
 	encoding.TextMarshaler
 }
 
-type CreateJobReq struct {
-	Namespace  string
-	Queue      string
-	ID         string
-	Body       []byte
-	TTL        uint32
-	Delay      uint32
-	Tries      uint16
-	Attributes map[string]string
-}
-
 type jobImpl struct {
 	namespace  string
 	queue      string
@@ -67,17 +56,16 @@ func NewJob(namespace, queue string, body []byte, ttl, delay uint32, tries uint1
 	}
 }
 
-func NewJobWithID(namespace, queue string, body []byte, ttl uint32, tries uint16, jobID string, attrs map[string]string) Job {
+func NewJobWithID(namespace, queue string, body []byte, ttl uint32, tries uint16, jobID string) Job {
 	delay, _ := uuid.ExtractDelaySecondFromUniqueID(jobID)
 	return &jobImpl{
-		namespace:  namespace,
-		queue:      queue,
-		id:         jobID,
-		body:       body,
-		ttl:        ttl,
-		delay:      delay,
-		tries:      tries,
-		attributes: attrs,
+		namespace: namespace,
+		queue:     queue,
+		id:        jobID,
+		body:      body,
+		ttl:       ttl,
+		delay:     delay,
+		tries:     tries,
 	}
 }
 
diff --git a/engine/pool.go b/engine/pool.go
index ab8868e..6d2edd4 100644
--- a/engine/pool.go
+++ b/engine/pool.go
@@ -4,7 +4,6 @@ import "github.com/bitleak/lmstfy/config"
 
 const (
 	KindRedis     = "redis"
-	KindRedisV2   = "redis_v2"
 	KindMigration = "migration"
 )
 
@@ -48,7 +47,7 @@ func GetEngine(pool string) Engine {
 	if pool == "" {
 		pool = config.DefaultPoolName
 	}
-	kinds := []string{KindRedis, KindRedisV2, KindMigration}
+	kinds := []string{KindRedis, KindMigration}
 	for _, kind := range kinds {
 		if e := GetEngineByKind(kind, pool); e != nil {
 			return e
diff --git a/engine/redis/engine.go b/engine/redis/engine.go
index 9599954..9f9b47e 100644
--- a/engine/redis/engine.go
+++ b/engine/redis/engine.go
@@ -28,9 +28,6 @@ type Engine struct {
 	timer   *Timer
 	meta    *MetaManager
 	monitor *SizeMonitor
-	// number of seconds. when job's delay second is greater than pumpStorageThresh,
-	//it will be written to storage if enabled
-	storageThresh uint32
 }
 
 func NewEngine(redisName string, conn *go_redis.Client) (engine.Engine, error) {
@@ -180,7 +177,7 @@ func (e *Engine) consumeMulti(namespace string, queues []string, ttrSecond, time
 		default:
 			return nil, fmt.Errorf("pool: %s", err)
 		}
-		job = engine.NewJobWithID(namespace, queueName.Queue, body, ttl, tries, jobID, nil)
+		job = engine.NewJobWithID(namespace, queueName.Queue, body, ttl, tries, jobID)
 		metrics.jobElapsedMS.WithLabelValues(e.redis.Name, namespace, queueName.Queue).Observe(float64(job.ElapsedMS()))
 		return job, nil
 	}
@@ -217,12 +214,12 @@ func (e *Engine) Peek(namespace, queue, optionalJobID string) (job engine.Job, e
 	// was assigned we should return the not fond error.
 	if optionalJobID == "" && err == engine.ErrNotFound {
 		// return jobID with nil body if the job is expired
-		return engine.NewJobWithID(namespace, queue, nil, 0, 0, jobID, nil), nil
+		return engine.NewJobWithID(namespace, queue, nil, 0, 0, jobID), nil
 	}
 	if err != nil {
 		return nil, err
 	}
-	return engine.NewJobWithID(namespace, queue, body, ttl, tries, jobID, nil), err
+	return engine.NewJobWithID(namespace, queue, body, ttl, tries, jobID), err
 }
 
 func (e *Engine) Size(namespace, queue string) (size int64, err error) {
diff --git a/server/handlers/middleware.go b/server/handlers/middleware.go
index 7946fe1..00f088a 100644
--- a/server/handlers/middleware.go
+++ b/server/handlers/middleware.go
@@ -102,11 +102,3 @@ func ValidateMultiConsume(c *gin.Context) {
 		return
 	}
 }
-
-func CheckPoolExists(c *gin.Context) {
-	pool := c.Query("pool")
-	if exists := engine.ExistsPool(pool); !exists {
-		c.JSON(http.StatusBadRequest, auth.ErrPoolNotExist)
-		c.Abort()
-	}
-}
diff --git a/server/handlers/queue.go b/server/handlers/queue.go
index 7604b65..0e3e381 100644
--- a/server/handlers/queue.go
+++ b/server/handlers/queue.go
@@ -595,16 +595,3 @@ func DestroyQueue(c *gin.Context) {
 	}).Info("queue destroyed")
 	c.Status(http.StatusNoContent)
 }
-
-func parseAttributes(c *gin.Context) map[string]string {
-	attributes := make(map[string]string)
-	for key, vals := range c.Request.Header {
-		lowerKey := strings.ToLower(key)
-		if !strings.HasPrefix(lowerKey, jobAttributeHeaderPrefix) || len(vals) == 0 {
-			continue
-		}
-		field := strings.TrimPrefix(lowerKey, jobAttributeHeaderPrefix)
-		attributes[field] = vals[0]
-	}
-	return attributes
-}