diff --git a/weed/command/server.go b/weed/command/server.go
index 0c5070981..c8878e9eb 100644
--- a/weed/command/server.go
+++ b/weed/command/server.go
@@ -266,7 +266,6 @@ func runServer(cmd *Command, args []string) bool {
 		volumeNeedleMapKind,
 		*serverIp+":"+strconv.Itoa(*masterPort), *volumePulse, *serverDataCenter, *serverRack,
 		serverWhiteList, *volumeFixJpgOrientation, *volumeReadRedirect,
-		*volumeEnableBytesCache,
 	)
 
 	glog.V(0).Infoln("Start Seaweed volume server", util.VERSION, "at", *serverIp+":"+strconv.Itoa(*volumePort))
diff --git a/weed/command/volume.go b/weed/command/volume.go
index a4e316ecb..ad9803974 100644
--- a/weed/command/volume.go
+++ b/weed/command/volume.go
@@ -36,7 +36,6 @@ type VolumeServerOptions struct {
 	indexType             *string
 	fixJpgOrientation     *bool
 	readRedirect          *bool
-	enableBytesCache      *bool
 }
 
 func init() {
@@ -55,7 +54,6 @@ func init() {
 	v.indexType = cmdVolume.Flag.String("index", "memory", "Choose [memory|leveldb|boltdb|btree] mode for memory~performance balance.")
 	v.fixJpgOrientation = cmdVolume.Flag.Bool("images.fix.orientation", true, "Adjust jpg orientation when uploading.")
 	v.readRedirect = cmdVolume.Flag.Bool("read.redirect", true, "Redirect moved or non-local volumes.")
-	v.enableBytesCache = cmdVolume.Flag.Bool("cache.enable", false, "direct cache instead of OS cache, cost more memory.")
 }
 
 var cmdVolume = &Command{
@@ -136,7 +134,6 @@ func runVolume(cmd *Command, args []string) bool {
 		*v.master, *v.pulseSeconds, *v.dataCenter, *v.rack,
 		v.whiteList,
 		*v.fixJpgOrientation, *v.readRedirect,
-		*v.enableBytesCache,
 	)
 
 	listeningAddress := *v.bindIp + ":" + strconv.Itoa(*v.port)
diff --git a/weed/server/volume_server.go b/weed/server/volume_server.go
index cc06f0092..cace8d181 100644
--- a/weed/server/volume_server.go
+++ b/weed/server/volume_server.go
@@ -32,8 +32,7 @@ func NewVolumeServer(adminMux, publicMux *http.ServeMux, ip string,
 	dataCenter string, rack string,
 	whiteList []string,
 	fixJpgOrientation bool,
-	readRedirect bool,
-	enableBytesCache bool) *VolumeServer {
+	readRedirect bool) *VolumeServer {
 	vs := &VolumeServer{
 		pulseSeconds:      pulseSeconds,
 		dataCenter:        dataCenter,
@@ -44,7 +43,6 @@ func NewVolumeServer(adminMux, publicMux *http.ServeMux, ip string,
 	}
 	vs.SetMasterNode(masterNode)
 	vs.store = storage.NewStore(port, ip, publicUrl, folders, maxCounts, vs.needleMapKind)
-	storage.EnableBytesCache = enableBytesCache
 
 	vs.guard = security.NewGuard(whiteList, "")
 
diff --git a/weed/server/volume_server_handlers_read.go b/weed/server/volume_server_handlers_read.go
index 8f50b265e..9b0fee4eb 100644
--- a/weed/server/volume_server_handlers_read.go
+++ b/weed/server/volume_server_handlers_read.go
@@ -72,7 +72,6 @@ func (vs *VolumeServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request)
 		w.WriteHeader(http.StatusNotFound)
 		return
 	}
-	defer n.ReleaseMemory()
 	if n.Cookie != cookie {
 		glog.V(0).Infoln("request", r.URL.Path, "with unmaching cookie seen:", cookie, "expected:", n.Cookie, "from", r.RemoteAddr, "agent", r.UserAgent())
 		w.WriteHeader(http.StatusNotFound)
diff --git a/weed/server/volume_server_handlers_sync.go b/weed/server/volume_server_handlers_sync.go
index 68c381e28..df1fde590 100644
--- a/weed/server/volume_server_handlers_sync.go
+++ b/weed/server/volume_server_handlers_sync.go
@@ -50,8 +50,7 @@ func (vs *VolumeServer) getVolumeDataContentHandler(w http.ResponseWriter, r *ht
 	}
 	offset := uint32(util.ParseUint64(r.FormValue("offset"), 0))
 	size := uint32(util.ParseUint64(r.FormValue("size"), 0))
-	content, block, err := storage.ReadNeedleBlob(v.DataFile(), int64(offset)*storage.NeedlePaddingSize, size)
-	defer storage.ReleaseBytes(block.Bytes)
+	content, err := storage.ReadNeedleBlob(v.DataFile(), int64(offset)*storage.NeedlePaddingSize, size)
 	if err != nil {
 		writeJsonError(w, r, http.StatusInternalServerError, err)
 		return
@@ -83,4 +82,4 @@ func (vs *VolumeServer) getVolumeId(volumeParameterName string, r *http.Request)
 	}
 
 	return vid, err
-}
\ No newline at end of file
+}
diff --git a/weed/server/volume_server_handlers_write.go b/weed/server/volume_server_handlers_write.go
index b02a58fc8..e45c2245c 100644
--- a/weed/server/volume_server_handlers_write.go
+++ b/weed/server/volume_server_handlers_write.go
@@ -64,7 +64,6 @@ func (vs *VolumeServer) DeleteHandler(w http.ResponseWriter, r *http.Request) {
 		writeJsonQuiet(w, r, http.StatusNotFound, m)
 		return
 	}
-	defer n.ReleaseMemory()
 
 	if n.Cookie != cookie {
 		glog.V(0).Infoln("delete", r.URL.Path, "with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent())
@@ -133,7 +132,6 @@ func (vs *VolumeServer) batchDeleteHandler(w http.ResponseWriter, r *http.Reques
 				Status: http.StatusNotAcceptable,
 				Error:  "ChunkManifest: not allowed in batch delete mode.",
 			})
-			n.ReleaseMemory()
 			continue
 		}
 
@@ -144,7 +142,6 @@ func (vs *VolumeServer) batchDeleteHandler(w http.ResponseWriter, r *http.Reques
 				Error:  "File Random Cookie does not match.",
 			})
 			glog.V(0).Infoln("deleting", fid, "with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent())
-			n.ReleaseMemory()
 			return
 		}
 		if size, err := vs.store.Delete(volumeId, n); err != nil {
@@ -160,7 +157,6 @@ func (vs *VolumeServer) batchDeleteHandler(w http.ResponseWriter, r *http.Reques
 				Size:   int(size)},
 			)
 		}
-		n.ReleaseMemory()
 	}
 
 	writeJsonQuiet(w, r, http.StatusAccepted, ret)
diff --git a/weed/storage/needle.go b/weed/storage/needle.go
index 29e70ff10..2ffaff4de 100644
--- a/weed/storage/needle.go
+++ b/weed/storage/needle.go
@@ -49,8 +49,6 @@ type Needle struct {
 
 	Checksum CRC    `comment:"CRC32 to check integrity"`
 	Padding  []byte `comment:"Aligned to 8 bytes"`
-
-	rawBlock *Block // underlying supporing []byte, fetched and released into a pool
 }
 
 func (n *Needle) String() (str string) {
diff --git a/weed/storage/needle_byte_cache.go b/weed/storage/needle_byte_cache.go
index dfc32bcbf..78c1ea862 100644
--- a/weed/storage/needle_byte_cache.go
+++ b/weed/storage/needle_byte_cache.go
@@ -1,80 +1,11 @@
 package storage
 
 import (
-	"fmt"
 	"os"
-	"sync/atomic"
-
-	"github.com/hashicorp/golang-lru"
-
-	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
-var (
-	EnableBytesCache = true
-	bytesCache       *lru.Cache
-	bytesPool        *util.BytesPool
-)
-
-/*
-There are one level of caching, and one level of pooling.
-
-In pooling, all []byte are fetched and returned to the pool bytesPool.
-
-In caching, the string~[]byte mapping is cached
-*/
-func init() {
-	bytesPool = util.NewBytesPool()
-	bytesCache, _ = lru.NewWithEvict(512, func(key interface{}, value interface{}) {
-		value.(*Block).decreaseReference()
-	})
-}
-
-type Block struct {
-	Bytes    []byte
-	refCount int32
-}
-
-func (block *Block) decreaseReference() {
-	if atomic.AddInt32(&block.refCount, -1) == 0 {
-		bytesPool.Put(block.Bytes)
-	}
-}
-func (block *Block) increaseReference() {
-	atomic.AddInt32(&block.refCount, 1)
-}
-
-// get bytes from the LRU cache of []byte first, then from the bytes pool
-// when []byte in LRU cache is evicted, it will be put back to the bytes pool
-func getBytesForFileBlock(r *os.File, offset int64, readSize int) (dataSlice []byte, block *Block, err error) {
-	// check cache, return if found
-	cacheKey := fmt.Sprintf("%d:%d:%d", r.Fd(), offset>>3, readSize)
-	if EnableBytesCache {
-		if obj, found := bytesCache.Get(cacheKey); found {
-			block = obj.(*Block)
-			block.increaseReference()
-			dataSlice = block.Bytes[0:readSize]
-			return dataSlice, block, nil
-		}
-	}
-
-	// get the []byte from pool
-	b := bytesPool.Get(readSize)
-	// refCount = 2, one by the bytesCache, one by the actual needle object
-	block = &Block{Bytes: b, refCount: 2}
-	dataSlice = block.Bytes[0:readSize]
+func getBytesForFileBlock(r *os.File, offset int64, readSize int) (dataSlice []byte, err error) {
+	dataSlice = make([]byte, readSize)
 	_, err = r.ReadAt(dataSlice, offset)
-	if EnableBytesCache {
-		bytesCache.Add(cacheKey, block)
-	}
-	return dataSlice, block, err
-}
-
-func (n *Needle) ReleaseMemory() {
-	if n.rawBlock != nil {
-		n.rawBlock.decreaseReference()
-	}
-}
-func ReleaseBytes(b []byte) {
-	bytesPool.Put(b)
+	return dataSlice, err
 }
diff --git a/weed/storage/needle_read_write.go b/weed/storage/needle_read_write.go
index 4f03ce396..ee7cc6046 100644
--- a/weed/storage/needle_read_write.go
+++ b/weed/storage/needle_read_write.go
@@ -151,16 +151,15 @@ func (n *Needle) Append(w io.Writer, version Version) (size uint32, actualSize i
 	return 0, 0, fmt.Errorf("Unsupported Version! (%d)", version)
 }
 
-func ReadNeedleBlob(r *os.File, offset int64, size uint32) (dataSlice []byte, block *Block, err error) {
+func ReadNeedleBlob(r *os.File, offset int64, size uint32) (dataSlice []byte, err error) {
 	return getBytesForFileBlock(r, offset, int(getActualSize(size)))
 }
 
 func (n *Needle) ReadData(r *os.File, offset int64, size uint32, version Version) (err error) {
-	bytes, block, err := ReadNeedleBlob(r, offset, size)
+	bytes, err := ReadNeedleBlob(r, offset, size)
 	if err != nil {
 		return err
 	}
-	n.rawBlock = block
 	n.ParseNeedleHeader(bytes)
 	if n.Size != size {
 		return fmt.Errorf("File Entry Not Found. Needle %d Memory %d", n.Size, size)
diff --git a/weed/storage/volume_read_write.go b/weed/storage/volume_read_write.go
index 2314bc815..16d8b6d04 100644
--- a/weed/storage/volume_read_write.go
+++ b/weed/storage/volume_read_write.go
@@ -25,7 +25,6 @@ func (v *Volume) isFileUnchanged(n *Needle) bool {
 			glog.V(0).Infof("Failed to check updated file %v", err)
 			return false
 		}
-		defer oldNeedle.ReleaseMemory()
 		if oldNeedle.Checksum == n.Checksum && bytes.Equal(oldNeedle.Data, n.Data) {
 			n.DataSize = oldNeedle.DataSize
 			return true
@@ -172,7 +171,6 @@ func (v *Volume) readNeedle(n *Needle) (int, error) {
 	if uint64(time.Now().Unix()) < n.LastModified+uint64(ttlMinutes*60) {
 		return bytesRead, nil
 	}
-	n.ReleaseMemory()
 	return -1, errors.New("Not Found")
 }
 
diff --git a/weed/storage/volume_vacuum.go b/weed/storage/volume_vacuum.go
index f6f68d59b..22c117c41 100644
--- a/weed/storage/volume_vacuum.go
+++ b/weed/storage/volume_vacuum.go
@@ -178,7 +178,7 @@ func (v *Volume) makeupDiff(newDatFileName, newIdxFileName, oldDatFileName, oldI
 			if incre_idx_entry.offset != 0 && incre_idx_entry.size != 0 {
 				//even the needle cache in memory is hit, the need_bytes is correct
 				var needle_bytes []byte
-				needle_bytes, _, err = ReadNeedleBlob(oldDatFile, int64(incre_idx_entry.offset)*NeedlePaddingSize, incre_idx_entry.size)
+				needle_bytes, err = ReadNeedleBlob(oldDatFile, int64(incre_idx_entry.offset)*NeedlePaddingSize, incre_idx_entry.size)
 				if err != nil {
 					return
 				}
@@ -291,7 +291,6 @@ func (v *Volume) copyDataBasedOnIndexFile(dstName, idxName string) (err error) {
 
 		n := new(Needle)
 		n.ReadData(v.dataFile, int64(offset)*NeedlePaddingSize, size, v.Version())
-		defer n.ReleaseMemory()
 
 		if n.HasTtl() && now >= n.LastModified+uint64(v.Ttl.Minutes()*60) {
 			return nil
diff --git a/weed/util/bytes_pool.go b/weed/util/bytes_pool.go
deleted file mode 100644
index 58ed6feca..000000000
--- a/weed/util/bytes_pool.go
+++ /dev/null
@@ -1,127 +0,0 @@
-package util
-
-import (
-	"bytes"
-	"fmt"
-	"sync"
-	"sync/atomic"
-	"time"
-)
-
-var (
-	ChunkSizes = []int{
-		1 << 4,  // index 0, 16 bytes, inclusive
-		1 << 6,  // index 1, 64 bytes
-		1 << 8,  // index 2, 256 bytes
-		1 << 10, // index 3, 1K bytes
-		1 << 12, // index 4, 4K bytes
-		1 << 14, // index 5, 16K bytes
-		1 << 16, // index 6, 64K bytes
-		1 << 18, // index 7, 256K bytes
-		1 << 20, // index 8, 1M bytes
-		1 << 22, // index 9, 4M bytes
-		1 << 24, // index 10, 16M bytes
-		1 << 26, // index 11, 64M bytes
-		1 << 28, // index 12, 128M bytes
-	}
-
-	_DEBUG = false
-)
-
-type BytesPool struct {
-	chunkPools []*byteChunkPool
-}
-
-func NewBytesPool() *BytesPool {
-	var bp BytesPool
-	for _, size := range ChunkSizes {
-		bp.chunkPools = append(bp.chunkPools, newByteChunkPool(size))
-	}
-	ret := &bp
-	if _DEBUG {
-		t := time.NewTicker(10 * time.Second)
-		go func() {
-			for {
-				println("buffer:", ret.String())
-				<-t.C
-			}
-		}()
-	}
-	return ret
-}
-
-func (m *BytesPool) String() string {
-	var buf bytes.Buffer
-	for index, size := range ChunkSizes {
-		if m.chunkPools[index].count > 0 {
-			buf.WriteString(fmt.Sprintf("size:%d count:%d\n", size, m.chunkPools[index].count))
-		}
-	}
-	return buf.String()
-}
-
-func findChunkPoolIndex(size int) int {
-	if size <= 0 {
-		return -1
-	}
-	size = (size - 1) >> 4
-	ret := 0
-	for size > 0 {
-		size = size >> 2
-		ret = ret + 1
-	}
-	if ret >= len(ChunkSizes) {
-		return -1
-	}
-	return ret
-}
-
-func (m *BytesPool) Get(size int) []byte {
-	index := findChunkPoolIndex(size)
-	// println("get index:", index)
-	if index < 0 {
-		return make([]byte, size)
-	}
-	return m.chunkPools[index].Get()
-}
-
-func (m *BytesPool) Put(b []byte) {
-	index := findChunkPoolIndex(len(b))
-	// println("put index:", index)
-	if index < 0 {
-		return
-	}
-	m.chunkPools[index].Put(b)
-}
-
-// a pool of fix-sized []byte chunks. The pool size is managed by Go GC
-type byteChunkPool struct {
-	sync.Pool
-	chunkSizeLimit int
-	count          int64
-}
-
-var count int
-
-func newByteChunkPool(chunkSizeLimit int) *byteChunkPool {
-	var m byteChunkPool
-	m.chunkSizeLimit = chunkSizeLimit
-	m.Pool.New = func() interface{} {
-		count++
-		// println("creating []byte size", m.chunkSizeLimit, "new", count, "count", m.count)
-		return make([]byte, m.chunkSizeLimit)
-	}
-	return &m
-}
-
-func (m *byteChunkPool) Get() []byte {
-	// println("before get size:", m.chunkSizeLimit, "count:", m.count)
-	atomic.AddInt64(&m.count, 1)
-	return m.Pool.Get().([]byte)
-}
-
-func (m *byteChunkPool) Put(b []byte) {
-	atomic.AddInt64(&m.count, -1)
-	// println("after put get size:", m.chunkSizeLimit, "count:", m.count)
-	m.Pool.Put(b)
-}
diff --git a/weed/util/bytes_pool_test.go b/weed/util/bytes_pool_test.go
deleted file mode 100644
index 3f37c16cf..000000000
--- a/weed/util/bytes_pool_test.go
+++ /dev/null
@@ -1,41 +0,0 @@
-package util
-
-import (
-	"testing"
-)
-
-func TestTTLReadWrite(t *testing.T) {
-	var tests = []struct {
-		n        int // input
-		expected int // expected result
-	}{
-		{0, -1},
-		{1, 0},
-		{1 << 4, 0},
-		{1 << 6, 1},
-		{1 << 8, 2},
-		{1 << 10, 3},
-		{1 << 12, 4},
-		{1 << 14, 5},
-		{1 << 16, 6},
-		{1 << 18, 7},
-		{1<<4 + 1, 1},
-		{1<<6 + 1, 2},
-		{1<<8 + 1, 3},
-		{1<<10 + 1, 4},
-		{1<<12 + 1, 5},
-		{1<<14 + 1, 6},
-		{1<<16 + 1, 7},
-		{1<<18 + 1, 8},
-		{1<<28 - 1, 12},
-		{1 << 28, 12},
-		{1<<28 + 2134, -1},
-		{1080, 4},
-	}
-	for _, tt := range tests {
-		actual := findChunkPoolIndex(tt.n)
-		if actual != tt.expected {
-			t.Errorf("findChunkPoolIndex(%d): expected %d, actual %d", tt.n, tt.expected, actual)
-		}
-	}
-}