diff --git a/other/java/client/src/main/proto/filer.proto b/other/java/client/src/main/proto/filer.proto
index f75caec4e..4d9398897 100644
--- a/other/java/client/src/main/proto/filer.proto
+++ b/other/java/client/src/main/proto/filer.proto
@@ -362,6 +362,7 @@ message FilerConf {
             SSD = 1;
         }
         DiskType disk_type = 5;
+        bool fsync = 6;
     }
     repeated PathConf locations = 2;
 }
diff --git a/weed/filer/filer_notify_append.go b/weed/filer/filer_notify_append.go
index b1836b046..19da97f6c 100644
--- a/weed/filer/filer_notify_append.go
+++ b/weed/filer/filer_notify_append.go
@@ -13,7 +13,7 @@ import (
 
 func (f *Filer) appendToFile(targetFile string, data []byte) error {
 
-	assignResult, uploadResult, err2 := f.assignAndUpload(data)
+	assignResult, uploadResult, err2 := f.assignAndUpload(targetFile, data)
 	if err2 != nil {
 		return err2
 	}
@@ -46,14 +46,16 @@ func (f *Filer) appendToFile(targetFile string, data []byte) error {
 	return err
 }
 
-func (f *Filer) assignAndUpload(data []byte) (*operation.AssignResult, *operation.UploadResult, error) {
+func (f *Filer) assignAndUpload(targetFile string, data []byte) (*operation.AssignResult, *operation.UploadResult, error) {
 	// assign a volume location
+	rule := f.FilerConf.MatchStorageRule(targetFile)
 	assignRequest := &operation.VolumeAssignRequest{
 		Count:               1,
-		Collection:          f.metaLogCollection,
-		Replication:         f.metaLogReplication,
+		Collection:          util.Nvl(f.metaLogCollection, rule.Collection),
+		Replication:         util.Nvl(f.metaLogReplication, rule.Replication),
 		WritableVolumeCount: 1,
 	}
+
 	assignResult, err := operation.Assign(f.GetMaster(), f.GrpcDialOption, assignRequest)
 	if err != nil {
 		return nil, nil, fmt.Errorf("AssignVolume: %v", err)
diff --git a/weed/filer/storage_option.go b/weed/filer/storage_option.go
deleted file mode 100644
index ba9968fcc..000000000
--- a/weed/filer/storage_option.go
+++ /dev/null
@@ -1,16 +0,0 @@
-package filer
-
-import "github.com/chrislusf/seaweedfs/weed/storage/needle"
-
-type StorageOption struct {
-	Replication string
-	Collection  string
-	DataCenter  string
-	Rack        string
-	TtlSeconds  int32
-	Fsync       bool
-}
-
-func (so *StorageOption) TtlString() string {
-	return needle.SecondsToTTL(so.TtlSeconds)
-}
\ No newline at end of file
diff --git a/weed/operation/assign_file_id.go b/weed/operation/assign_file_id.go
index 893bf516c..c58d3a84d 100644
--- a/weed/operation/assign_file_id.go
+++ b/weed/operation/assign_file_id.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 	"google.golang.org/grpc"
 
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
@@ -101,3 +102,39 @@ func LookupJwt(master string, fileId string) security.EncodedJwt {
 
 	return security.EncodedJwt(tokenStr)
 }
+
+type StorageOption struct {
+	Replication string
+	Collection  string
+	DataCenter  string
+	Rack        string
+	TtlSeconds  int32
+	Fsync       bool
+}
+
+func (so *StorageOption) TtlString() string {
+	return needle.SecondsToTTL(so.TtlSeconds)
+}
+
+func (so *StorageOption) ToAssignRequests(count int) (ar *VolumeAssignRequest, altRequest *VolumeAssignRequest) {
+	ar = &VolumeAssignRequest{
+		Count:       uint64(count),
+		Replication: so.Replication,
+		Collection:  so.Collection,
+		Ttl:         so.TtlString(),
+		DataCenter:  so.DataCenter,
+		Rack:        so.Rack,
+	}
+	if so.DataCenter != "" || so.Rack != "" {
+		altRequest = &VolumeAssignRequest{
+			Count:       uint64(count),
+			Replication: so.Replication,
+			Collection:  so.Collection,
+			Ttl:         so.TtlString(),
+			DataCenter:  "",
+			Rack:        "",
+		}
+	}
+	return
+}
+
diff --git a/weed/pb/filer.proto b/weed/pb/filer.proto
index f75caec4e..4d9398897 100644
--- a/weed/pb/filer.proto
+++ b/weed/pb/filer.proto
@@ -362,6 +362,7 @@ message FilerConf {
             SSD = 1;
         }
         DiskType disk_type = 5;
+        bool fsync = 6;
     }
     repeated PathConf locations = 2;
 }
diff --git a/weed/pb/filer_pb/filer.pb.go b/weed/pb/filer_pb/filer.pb.go
index 42de8b6ef..9ae7e7ef2 100644
--- a/weed/pb/filer_pb/filer.pb.go
+++ b/weed/pb/filer_pb/filer.pb.go
@@ -3171,6 +3171,7 @@ type FilerConf_PathConf struct {
 	Replication    string                      `protobuf:"bytes,3,opt,name=replication,proto3" json:"replication,omitempty"`
 	Ttl            string                      `protobuf:"bytes,4,opt,name=ttl,proto3" json:"ttl,omitempty"`
 	DiskType       FilerConf_PathConf_DiskType `protobuf:"varint,5,opt,name=disk_type,json=diskType,proto3,enum=filer_pb.FilerConf_PathConf_DiskType" json:"disk_type,omitempty"`
+	Fsync          bool                        `protobuf:"varint,6,opt,name=fsync,proto3" json:"fsync,omitempty"`
 }
 
 func (x *FilerConf_PathConf) Reset() {
@@ -3240,6 +3241,13 @@ func (x *FilerConf_PathConf) GetDiskType() FilerConf_PathConf_DiskType {
 	return FilerConf_PathConf_HDD
 }
 
+func (x *FilerConf_PathConf) GetFsync() bool {
+	if x != nil {
+		return x.Fsync
+	}
+	return false
+}
+
 var File_filer_proto protoreflect.FileDescriptor
 
 var file_filer_proto_rawDesc = []byte{
@@ -3614,13 +3622,13 @@ var file_filer_proto_rawDesc = []byte{
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@@ -3633,117 +3641,118 @@ var file_filer_proto_rawDesc = []byte{
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+	0x73, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x1c, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72,
+	0x5f, 0x70, 0x62, 0x2e, 0x53, 0x74, 0x61, 0x74, 0x69, 0x73, 0x74, 0x69, 0x63, 0x73, 0x52, 0x65,
+	0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x12, 0x6a, 0x0a, 0x15, 0x47, 0x65, 0x74, 0x46,
+	0x69, 0x6c, 0x65, 0x72, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x75, 0x72, 0x61, 0x74, 0x69, 0x6f,
+	0x6e, 0x12, 0x26, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x47, 0x65, 0x74,
+	0x46, 0x69, 0x6c, 0x65, 0x72, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x75, 0x72, 0x61, 0x74, 0x69,
+	0x6f, 0x6e, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x27, 0x2e, 0x66, 0x69, 0x6c, 0x65,
+	0x72, 0x5f, 0x70, 0x62, 0x2e, 0x47, 0x65, 0x74, 0x46, 0x69, 0x6c, 0x65, 0x72, 0x43, 0x6f, 0x6e,
+	0x66, 0x69, 0x67, 0x75, 0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e,
+	0x73, 0x65, 0x22, 0x00, 0x12, 0x60, 0x0a, 0x11, 0x53, 0x75, 0x62, 0x73, 0x63, 0x72, 0x69, 0x62,
+	0x65, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x12, 0x22, 0x2e, 0x66, 0x69, 0x6c, 0x65,
+	0x72, 0x5f, 0x70, 0x62, 0x2e, 0x53, 0x75, 0x62, 0x73, 0x63, 0x72, 0x69, 0x62, 0x65, 0x4d, 0x65,
+	0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x23, 0x2e,
+	0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x53, 0x75, 0x62, 0x73, 0x63, 0x72, 0x69,
+	0x62, 0x65, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e,
+	0x73, 0x65, 0x22, 0x00, 0x30, 0x01, 0x12, 0x65, 0x0a, 0x16, 0x53, 0x75, 0x62, 0x73, 0x63, 0x72,
+	0x69, 0x62, 0x65, 0x4c, 0x6f, 0x63, 0x61, 0x6c, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61,
+	0x12, 0x22, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x53, 0x75, 0x62, 0x73,
+	0x63, 0x72, 0x69, 0x62, 0x65, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0x52, 0x65, 0x71,
+	0x75, 0x65, 0x73, 0x74, 0x1a, 0x23, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e,
+	0x53, 0x75, 0x62, 0x73, 0x63, 0x72, 0x69, 0x62, 0x65, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74,
+	0x61, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x30, 0x01, 0x12, 0x56, 0x0a,
+	0x0d, 0x4b, 0x65, 0x65, 0x70, 0x43, 0x6f, 0x6e, 0x6e, 0x65, 0x63, 0x74, 0x65, 0x64, 0x12, 0x1e,
+	0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4b, 0x65, 0x65, 0x70, 0x43, 0x6f,
+	0x6e, 0x6e, 0x65, 0x63, 0x74, 0x65, 0x64, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x1f,
+	0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4b, 0x65, 0x65, 0x70, 0x43, 0x6f,
+	0x6e, 0x6e, 0x65, 0x63, 0x74, 0x65, 0x64, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22,
+	0x00, 0x28, 0x01, 0x30, 0x01, 0x12, 0x4f, 0x0a, 0x0c, 0x4c, 0x6f, 0x63, 0x61, 0x74, 0x65, 0x42,
+	0x72, 0x6f, 0x6b, 0x65, 0x72, 0x12, 0x1d, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62,
+	0x2e, 0x4c, 0x6f, 0x63, 0x61, 0x74, 0x65, 0x42, 0x72, 0x6f, 0x6b, 0x65, 0x72, 0x52, 0x65, 0x71,
+	0x75, 0x65, 0x73, 0x74, 0x1a, 0x1e, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e,
+	0x4c, 0x6f, 0x63, 0x61, 0x74, 0x65, 0x42, 0x72, 0x6f, 0x6b, 0x65, 0x72, 0x52, 0x65, 0x73, 0x70,
+	0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x12, 0x3a, 0x0a, 0x05, 0x4b, 0x76, 0x47, 0x65, 0x74, 0x12,
+	0x16, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4b, 0x76, 0x47, 0x65, 0x74,
+	0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x17, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f,
+	0x70, 0x62, 0x2e, 0x4b, 0x76, 0x47, 0x65, 0x74, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65,
+	0x22, 0x00, 0x12, 0x3a, 0x0a, 0x05, 0x4b, 0x76, 0x50, 0x75, 0x74, 0x12, 0x16, 0x2e, 0x66, 0x69,
+	0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4b, 0x76, 0x50, 0x75, 0x74, 0x52, 0x65, 0x71, 0x75,
+	0x65, 0x73, 0x74, 0x1a, 0x17, 0x2e, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x2e, 0x4b,
+	0x76, 0x50, 0x75, 0x74, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x42, 0x4f,
+	0x0a, 0x10, 0x73, 0x65, 0x61, 0x77, 0x65, 0x65, 0x64, 0x66, 0x73, 0x2e, 0x63, 0x6c, 0x69, 0x65,
+	0x6e, 0x74, 0x42, 0x0a, 0x46, 0x69, 0x6c, 0x65, 0x72, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x5a, 0x2f,
+	0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x63, 0x68, 0x72, 0x69, 0x73,
+	0x6c, 0x75, 0x73, 0x66, 0x2f, 0x73, 0x65, 0x61, 0x77, 0x65, 0x65, 0x64, 0x66, 0x73, 0x2f, 0x77,
+	0x65, 0x65, 0x64, 0x2f, 0x70, 0x62, 0x2f, 0x66, 0x69, 0x6c, 0x65, 0x72, 0x5f, 0x70, 0x62, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/weed/server/common.go b/weed/server/common.go
index 62ddf6e7f..58079032e 100644
--- a/weed/server/common.go
+++ b/weed/server/common.go
@@ -127,6 +127,7 @@ func submitForClientHandler(w http.ResponseWriter, r *http.Request, masterUrl st
 	ar := &operation.VolumeAssignRequest{
 		Count:       count,
 		DataCenter:  r.FormValue("dataCenter"),
+		Rack:        r.FormValue("rack"),
 		Replication: r.FormValue("replication"),
 		Collection:  r.FormValue("collection"),
 		Ttl:         r.FormValue("ttl"),
diff --git a/weed/server/filer_grpc_server.go b/weed/server/filer_grpc_server.go
index e3f4bb161..7b04e4fab 100644
--- a/weed/server/filer_grpc_server.go
+++ b/weed/server/filer_grpc_server.go
@@ -156,7 +156,7 @@ func (fs *FilerServer) CreateEntry(ctx context.Context, req *filer_pb.CreateEntr
 
 	resp = &filer_pb.CreateEntryResponse{}
 
-	chunks, garbage, err2 := fs.cleanupChunks(nil, req.Entry)
+	chunks, garbage, err2 := fs.cleanupChunks(util.Join(req.Directory, req.Entry.Name), nil, req.Entry)
 	if err2 != nil {
 		return &filer_pb.CreateEntryResponse{}, fmt.Errorf("CreateEntry cleanupChunks %s %s: %v", req.Directory, req.Entry.Name, err2)
 	}
@@ -190,7 +190,7 @@ func (fs *FilerServer) UpdateEntry(ctx context.Context, req *filer_pb.UpdateEntr
 		return &filer_pb.UpdateEntryResponse{}, fmt.Errorf("not found %s: %v", fullpath, err)
 	}
 
-	chunks, garbage, err2 := fs.cleanupChunks(entry, req.Entry)
+	chunks, garbage, err2 := fs.cleanupChunks(fullpath, entry, req.Entry)
 	if err2 != nil {
 		return &filer_pb.UpdateEntryResponse{}, fmt.Errorf("UpdateEntry cleanupChunks %s: %v", fullpath, err2)
 	}
@@ -240,7 +240,7 @@ func (fs *FilerServer) UpdateEntry(ctx context.Context, req *filer_pb.UpdateEntr
 	return &filer_pb.UpdateEntryResponse{}, err
 }
 
-func (fs *FilerServer) cleanupChunks(existingEntry *filer.Entry, newEntry *filer_pb.Entry) (chunks, garbage []*filer_pb.FileChunk, err error) {
+func (fs *FilerServer) cleanupChunks(fullpath string, existingEntry *filer.Entry, newEntry *filer_pb.Entry) (chunks, garbage []*filer_pb.FileChunk, err error) {
 
 	// remove old chunks if not included in the new ones
 	if existingEntry != nil {
@@ -257,14 +257,13 @@ func (fs *FilerServer) cleanupChunks(existingEntry *filer.Entry, newEntry *filer
 	garbage = append(garbage, coveredChunks...)
 
 	if newEntry.Attributes != nil {
-		so := &filer.StorageOption{
-			Replication: newEntry.Attributes.Replication,
-			Collection:  newEntry.Attributes.Collection,
-			DataCenter:  "",
-			Rack:        "",
-			TtlSeconds:  newEntry.Attributes.TtlSec,
-			Fsync:       false,
-		}
+		so := fs.detectStorageOption(fullpath,
+			newEntry.Attributes.Collection,
+			newEntry.Attributes.Replication,
+			newEntry.Attributes.TtlSec,
+			"",
+			"",
+		)
 		chunks, err = filer.MaybeManifestize(fs.saveAsChunk(so), chunks)
 		if err != nil {
 			// not good, but should be ok
@@ -283,7 +282,7 @@ func (fs *FilerServer) AppendToEntry(ctx context.Context, req *filer_pb.AppendTo
 
 	fullpath := util.NewFullPath(req.Directory, req.EntryName)
 	var offset int64 = 0
-	entry, err := fs.filer.FindEntry(ctx, util.FullPath(fullpath))
+	entry, err := fs.filer.FindEntry(ctx, fullpath)
 	if err == filer_pb.ErrNotFound {
 		entry = &filer.Entry{
 			FullPath: fullpath,
@@ -305,14 +304,7 @@ func (fs *FilerServer) AppendToEntry(ctx context.Context, req *filer_pb.AppendTo
 	}
 
 	entry.Chunks = append(entry.Chunks, req.Chunks...)
-	so := &filer.StorageOption{
-		Replication: entry.Replication,
-		Collection:  entry.Collection,
-		DataCenter:  "",
-		Rack:        "",
-		TtlSeconds:  entry.TtlSec,
-		Fsync:       false,
-	}
+	so := fs.detectStorageOption(string(fullpath), entry.Collection, entry.Replication, entry.TtlSec, "", "")
 	entry.Chunks, err = filer.MaybeManifestize(fs.saveAsChunk(so), entry.Chunks)
 	if err != nil {
 		// not good, but should be ok
@@ -338,41 +330,10 @@ func (fs *FilerServer) DeleteEntry(ctx context.Context, req *filer_pb.DeleteEntr
 
 func (fs *FilerServer) AssignVolume(ctx context.Context, req *filer_pb.AssignVolumeRequest) (resp *filer_pb.AssignVolumeResponse, err error) {
 
-	ttlStr := ""
-	if req.TtlSec > 0 {
-		ttlStr = strconv.Itoa(int(req.TtlSec))
-	}
-	collection, replication, _ := fs.detectCollection(req.Path, req.Collection, req.Replication)
-
-	var altRequest *operation.VolumeAssignRequest
+	so := fs.detectStorageOption(req.Path, req.Collection, req.Replication, req.TtlSec, req.DataCenter, req.Rack)
 
-	dataCenter := req.DataCenter
-	if dataCenter == "" {
-		dataCenter = fs.option.DataCenter
-	}
-	rack := req.Rack
-	if rack == "" {
-		rack = fs.option.Rack
-	}
+	assignRequest, altRequest := so.ToAssignRequests(int(req.Count))
 
-	assignRequest := &operation.VolumeAssignRequest{
-		Count:       uint64(req.Count),
-		Replication: replication,
-		Collection:  collection,
-		Ttl:         ttlStr,
-		DataCenter:  dataCenter,
-		Rack:        rack,
-	}
-	if dataCenter != "" || rack != "" {
-		altRequest = &operation.VolumeAssignRequest{
-			Count:       uint64(req.Count),
-			Replication: replication,
-			Collection:  collection,
-			Ttl:         ttlStr,
-			DataCenter:  "",
-			Rack:        "",
-		}
-	}
 	assignResult, err := operation.Assign(fs.filer.GetMaster(), fs.grpcDialOption, assignRequest, altRequest)
 	if err != nil {
 		glog.V(3).Infof("AssignVolume: %v", err)
@@ -389,8 +350,8 @@ func (fs *FilerServer) AssignVolume(ctx context.Context, req *filer_pb.AssignVol
 		Url:         assignResult.Url,
 		PublicUrl:   assignResult.PublicUrl,
 		Auth:        string(assignResult.Auth),
-		Collection:  collection,
-		Replication: replication,
+		Collection:  so.Collection,
+		Replication: so.Replication,
 	}, nil
 }
 
diff --git a/weed/server/filer_server_handlers_write.go b/weed/server/filer_server_handlers_write.go
index e27d9eb26..0344d84dc 100644
--- a/weed/server/filer_server_handlers_write.go
+++ b/weed/server/filer_server_handlers_write.go
@@ -7,7 +7,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/operation"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
@@ -30,31 +29,13 @@ type FilerPostResult struct {
 	Url   string `json:"url,omitempty"`
 }
 
-func (fs *FilerServer) assignNewFileInfo(so *filer.StorageOption) (fileId, urlLocation string, auth security.EncodedJwt, err error) {
+func (fs *FilerServer) assignNewFileInfo(so *operation.StorageOption) (fileId, urlLocation string, auth security.EncodedJwt, err error) {
 
 	stats.FilerRequestCounter.WithLabelValues("assign").Inc()
 	start := time.Now()
 	defer func() { stats.FilerRequestHistogram.WithLabelValues("assign").Observe(time.Since(start).Seconds()) }()
 
-	ar := &operation.VolumeAssignRequest{
-		Count:       1,
-		Replication: so.Replication,
-		Collection:  so.Collection,
-		Ttl:         so.TtlString(),
-		DataCenter:  so.DataCenter,
-		Rack:        so.Rack,
-	}
-	var altRequest *operation.VolumeAssignRequest
-	if so.DataCenter != "" || so.Rack != "" {
-		altRequest = &operation.VolumeAssignRequest{
-			Count:       1,
-			Replication: so.Replication,
-			Collection:  so.Collection,
-			Ttl:         so.TtlString(),
-			DataCenter:  "",
-			Rack:        "",
-		}
-	}
+	ar, altRequest := so.ToAssignRequests(1)
 
 	assignResult, ae := operation.Assign(fs.filer.GetMaster(), fs.grpcDialOption, ar, altRequest)
 	if ae != nil {
@@ -76,32 +57,13 @@ func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
 	ctx := context.Background()
 
 	query := r.URL.Query()
-	collection, replication, fsync := fs.detectCollection(r.RequestURI, query.Get("collection"), query.Get("replication"))
-	dataCenter := query.Get("dataCenter")
-	if dataCenter == "" {
-		dataCenter = fs.option.DataCenter
-	}
-	rack := query.Get("rack")
-	if dataCenter == "" {
-		rack = fs.option.Rack
-	}
-	ttlString := r.URL.Query().Get("ttl")
-
-	// read ttl in seconds
-	ttl, err := needle.ReadTTL(ttlString)
-	ttlSeconds := int32(0)
-	if err == nil {
-		ttlSeconds = int32(ttl.Minutes()) * 60
-	}
-
-	so := &filer.StorageOption{
-		Replication: replication,
-		Collection:  collection,
-		DataCenter:  dataCenter,
-		Rack:        rack,
-		TtlSeconds:  ttlSeconds,
-		Fsync:       fsync,
-	}
+	so := fs.detectStorageOption0(r.RequestURI,
+		query.Get("collection"),
+		query.Get("replication"),
+		query.Get("ttl"),
+		query.Get("dataCenter"),
+		query.Get("rack"),
+	)
 
 	fs.autoChunk(ctx, w, r, so)
 
@@ -141,21 +103,12 @@ func (fs *FilerServer) DeleteHandler(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusNoContent)
 }
 
-func (fs *FilerServer) detectCollection(requestURI, qCollection, qReplication string) (collection, replication string, fsync bool) {
-	// default
-	collection = fs.option.Collection
-	replication = fs.option.DefaultReplication
-
-	// get default collection settings
-	if qCollection != "" {
-		collection = qCollection
-	}
-	if qReplication != "" {
-		replication = qReplication
-	}
+func (fs *FilerServer) detectStorageOption(requestURI, qCollection, qReplication string, ttlSeconds int32, dataCenter, rack string) (*operation.StorageOption) {
+	collection := util.Nvl(qCollection, fs.option.Collection)
+	replication := util.Nvl(qReplication, fs.option.DefaultReplication)
 
 	// required by buckets folder
-	bucketDefaultReplication := ""
+	bucketDefaultReplication, fsync := "", false
 	if strings.HasPrefix(requestURI, fs.filer.DirBucketsPath+"/") {
 		bucketAndObjectKey := requestURI[len(fs.filer.DirBucketsPath)+1:]
 		t := strings.Index(bucketAndObjectKey, "/")
@@ -171,5 +124,32 @@ func (fs *FilerServer) detectCollection(requestURI, qCollection, qReplication st
 		replication = bucketDefaultReplication
 	}
 
-	return
+	rule := fs.filer.FilerConf.MatchStorageRule(requestURI)
+
+	if ttlSeconds == 0 {
+		ttl, err := needle.ReadTTL(rule.GetTtl())
+		if err != nil {
+			glog.Errorf("fail to parse %s ttl setting %s: %v", rule.LocationPrefix, rule.Ttl, err)
+		}
+		ttlSeconds = int32(ttl.Minutes())*60
+	}
+
+	return &operation.StorageOption{
+		Replication: util.Nvl(replication, rule.Replication),
+		Collection:  util.Nvl(collection, rule.Collection),
+		DataCenter:  util.Nvl(dataCenter, fs.option.DataCenter),
+		Rack:        util.Nvl(rack, fs.option.Rack),
+		TtlSeconds:  ttlSeconds,
+		Fsync:       fsync || rule.Fsync,
+	}
+}
+
+func (fs *FilerServer) detectStorageOption0(requestURI, qCollection, qReplication string, qTtl string, dataCenter, rack string) (*operation.StorageOption) {
+
+	ttl, err := needle.ReadTTL(qTtl)
+	if err != nil {
+		glog.Errorf("fail to parse ttl %s: %v", qTtl, err)
+	}
+
+	return fs.detectStorageOption(requestURI, qCollection, qReplication, int32(ttl.Minutes())*60, dataCenter, rack)
 }
diff --git a/weed/server/filer_server_handlers_write_autochunk.go b/weed/server/filer_server_handlers_write_autochunk.go
index 178145e69..fd2db884f 100644
--- a/weed/server/filer_server_handlers_write_autochunk.go
+++ b/weed/server/filer_server_handlers_write_autochunk.go
@@ -25,7 +25,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
-func (fs *FilerServer) autoChunk(ctx context.Context, w http.ResponseWriter, r *http.Request, so *filer.StorageOption) {
+func (fs *FilerServer) autoChunk(ctx context.Context, w http.ResponseWriter, r *http.Request, so *operation.StorageOption) {
 
 	// autoChunking can be set at the command-line level or as a query param. Query param overrides command-line
 	query := r.URL.Query()
@@ -66,7 +66,7 @@ func (fs *FilerServer) autoChunk(ctx context.Context, w http.ResponseWriter, r *
 	}
 }
 
-func (fs *FilerServer) doPostAutoChunk(ctx context.Context, w http.ResponseWriter, r *http.Request, chunkSize int32, so *filer.StorageOption) (filerResult *FilerPostResult, md5bytes []byte, replyerr error) {
+func (fs *FilerServer) doPostAutoChunk(ctx context.Context, w http.ResponseWriter, r *http.Request, chunkSize int32, so *operation.StorageOption) (filerResult *FilerPostResult, md5bytes []byte, replyerr error) {
 
 	multipartReader, multipartReaderErr := r.MultipartReader()
 	if multipartReaderErr != nil {
@@ -104,7 +104,7 @@ func (fs *FilerServer) doPostAutoChunk(ctx context.Context, w http.ResponseWrite
 	return
 }
 
-func (fs *FilerServer) doPutAutoChunk(ctx context.Context, w http.ResponseWriter, r *http.Request, chunkSize int32, so *filer.StorageOption) (filerResult *FilerPostResult, md5bytes []byte, replyerr error) {
+func (fs *FilerServer) doPutAutoChunk(ctx context.Context, w http.ResponseWriter, r *http.Request, chunkSize int32, so *operation.StorageOption) (filerResult *FilerPostResult, md5bytes []byte, replyerr error) {
 
 	fileName := ""
 	contentType := ""
@@ -126,7 +126,7 @@ func (fs *FilerServer) doPutAutoChunk(ctx context.Context, w http.ResponseWriter
 	return
 }
 
-func (fs *FilerServer) saveMetaData(ctx context.Context, r *http.Request, fileName string, contentType string, so *filer.StorageOption, md5bytes []byte, fileChunks []*filer_pb.FileChunk, chunkOffset int64) (filerResult *FilerPostResult, replyerr error) {
+func (fs *FilerServer) saveMetaData(ctx context.Context, r *http.Request, fileName string, contentType string, so *operation.StorageOption, md5bytes []byte, fileChunks []*filer_pb.FileChunk, chunkOffset int64) (filerResult *FilerPostResult, replyerr error) {
 
 	// detect file mode
 	modeStr := r.URL.Query().Get("mode")
@@ -199,7 +199,7 @@ func (fs *FilerServer) saveMetaData(ctx context.Context, r *http.Request, fileNa
 	return filerResult, replyerr
 }
 
-func (fs *FilerServer) uploadReaderToChunks(w http.ResponseWriter, r *http.Request, reader io.Reader, chunkSize int32, fileName, contentType string, so *filer.StorageOption) ([]*filer_pb.FileChunk, hash.Hash, int64, error) {
+func (fs *FilerServer) uploadReaderToChunks(w http.ResponseWriter, r *http.Request, reader io.Reader, chunkSize int32, fileName, contentType string, so *operation.StorageOption) ([]*filer_pb.FileChunk, hash.Hash, int64, error) {
 	var fileChunks []*filer_pb.FileChunk
 
 	md5Hash := md5.New()
@@ -255,7 +255,7 @@ func (fs *FilerServer) doUpload(urlLocation string, w http.ResponseWriter, r *ht
 	return uploadResult, err
 }
 
-func (fs *FilerServer) saveAsChunk(so *filer.StorageOption) filer.SaveDataAsChunkFunctionType {
+func (fs *FilerServer) saveAsChunk(so *operation.StorageOption) filer.SaveDataAsChunkFunctionType {
 
 	return func(reader io.Reader, name string, offset int64) (*filer_pb.FileChunk, string, string, error) {
 		// assign one file id for one chunk
diff --git a/weed/server/filer_server_handlers_write_cipher.go b/weed/server/filer_server_handlers_write_cipher.go
index fa6b0a44f..3cc0d0c41 100644
--- a/weed/server/filer_server_handlers_write_cipher.go
+++ b/weed/server/filer_server_handlers_write_cipher.go
@@ -16,7 +16,7 @@ import (
 )
 
 // handling single chunk POST or PUT upload
-func (fs *FilerServer) encrypt(ctx context.Context, w http.ResponseWriter, r *http.Request, so *filer.StorageOption) (filerResult *FilerPostResult, err error) {
+func (fs *FilerServer) encrypt(ctx context.Context, w http.ResponseWriter, r *http.Request, so *operation.StorageOption) (filerResult *FilerPostResult, err error) {
 
 	fileId, urlLocation, auth, err := fs.assignNewFileInfo(so)
 
diff --git a/weed/util/retry.go b/weed/util/retry.go
index faaab0351..85c4d150d 100644
--- a/weed/util/retry.go
+++ b/weed/util/retry.go
@@ -29,3 +29,13 @@ func Retry(name string, job func() error) (err error) {
 	}
 	return err
 }
+
+// return the first non empty string
+func Nvl(values ...string) string {
+	for _, s := range values {
+		if s != "" {
+			return s
+		}
+	}
+	return ""
+}