Changed the InMemory bool to a uint32 so that it can be used to alter how much space to reserve

weed/command/backup.go

@@ -112,7 +112,7 @@ func runBackup(cmd *Command, args []string) bool {
 			return true
 		}
 	}
-	v, err := storage.NewVolume(*s.dir, *s.collection, vid, storage.NeedleMapInMemory, replication, ttl, 0, false)
+	v, err := storage.NewVolume(*s.dir, *s.collection, vid, storage.NeedleMapInMemory, replication, ttl, 0, 0)
 	if err != nil {
 		fmt.Printf("Error creating or reading from volume %d: %v\n", vid, err)
 		return true
@@ -137,7 +137,7 @@ func runBackup(cmd *Command, args []string) bool {
 		// remove the old data
 		v.Destroy()
 		// recreate an empty volume
-		v, err = storage.NewVolume(*s.dir, *s.collection, vid, storage.NeedleMapInMemory, replication, ttl, 0, false)
+		v, err = storage.NewVolume(*s.dir, *s.collection, vid, storage.NeedleMapInMemory, replication, ttl, 0, 0)
 		if err != nil {
 			fmt.Printf("Error creating or reading from volume %d: %v\n", vid, err)
 			return true

weed/command/compact.go

@@ -38,7 +38,7 @@ func runCompact(cmd *Command, args []string) bool {
 
 	vid := needle.VolumeId(*compactVolumeId)
 	v, err := storage.NewVolume(*compactVolumePath, *compactVolumeCollection, vid,
-		storage.NeedleMapInMemory, nil, nil, preallocate, false)
+		storage.NeedleMapInMemory, nil, nil, preallocate, 0)
 	if err != nil {
 		glog.Fatalf("Load Volume [ERROR] %s\n", err)
 	}

weed/pb/master.proto

@@ -139,7 +139,7 @@ message AssignRequest {
     string data_center = 5;
     string rack = 6;
     string data_node = 7;
-    bool in_memory = 8;
+    uint32 MemoryMapMaxSizeMB = 8;
 }
 message AssignResponse {
     string fid = 1;

weed/pb/master_pb/master.pb.go

@@ -658,7 +658,7 @@ type AssignRequest struct {
 	DataCenter         string `protobuf:"bytes,5,opt,name=data_center,json=dataCenter" json:"data_center,omitempty"`
 	Rack               string `protobuf:"bytes,6,opt,name=rack" json:"rack,omitempty"`
 	DataNode           string `protobuf:"bytes,7,opt,name=data_node,json=dataNode" json:"data_node,omitempty"`
-	InMemory    bool   `protobuf:"bytes,4,opt,name=inmemory" json:"inmemory,omitempty"`
+	MemoryMapMaxSizeMB uint32 `protobuf:"varint,8,opt,name=memorymapmaxsizemb" json:"memorymapmaxsizemb,omitempty"`
 }
 
 func (m *AssignRequest) Reset()                    { *m = AssignRequest{} }
@@ -715,11 +715,11 @@ func (m *AssignRequest) GetDataNode() string {
 	return ""
 }
 
-func (m *AssignRequest) GetInMemory() bool {
+func (m *AssignRequest) GetMemoryMapMaxSizeMB() uint32 {
 	if m != nil {
-		return m.InMemory
+		return m.MemoryMapMaxSizeMB
 	}
-	return false
+	return 0
 }
 
 type AssignResponse struct {

weed/pb/volume_server.proto

@@ -127,7 +127,7 @@ message AllocateVolumeRequest {
     int64 preallocate = 3;
     string replication = 4;
     string ttl = 5;
-    bool inmemory = 6;
+    int32 memorymapmaxsizemb = 6;
 }
 message AllocateVolumeResponse {
 }

weed/pb/volume_server_pb/volume_server.pb.go

@@ -321,7 +321,7 @@ type AllocateVolumeRequest struct {
 	Preallocate        int64  `protobuf:"varint,3,opt,name=preallocate" json:"preallocate,omitempty"`
 	Replication        string `protobuf:"bytes,4,opt,name=replication" json:"replication,omitempty"`
 	Ttl                string `protobuf:"bytes,5,opt,name=ttl" json:"ttl,omitempty"`
-	InMemory    bool   `protobuf:"varint,6,opt,name=inmemory" json:"inmemory,omitempty"`
+	MemoryMapMaxSizeMB uint32 `protobuf:"varint,6,opt,name=memorymapmaxsizemb" json:"memorymapmaxsizemb,omitempty"`
 }
 
 func (m *AllocateVolumeRequest) Reset()                    { *m = AllocateVolumeRequest{} }
@@ -364,11 +364,11 @@ func (m *AllocateVolumeRequest) GetTtl() string {
 	return ""
 }
 
-func (m *AllocateVolumeRequest) GetInMemory() bool {
+func (m *AllocateVolumeRequest) GetMemoryMapMaxSizeMB() uint32 {
 	if m != nil {
-		return m.InMemory
+		return m.MemoryMapMaxSizeMB
 	}
-	return false
+	return 0
 }
 
 type AllocateVolumeResponse struct {
@@ -1978,6 +1978,19 @@ func _VolumeServer_DeleteCollection_Handler(srv interface{}, ctx context.Context
 
 func _VolumeServer_AllocateVolume_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(AllocateVolumeRequest)
+
+	if in.MemoryMapMaxSizeMB > 0 {
+		test := 6
+		test += 5
+	}
+	if in.MemoryMapMaxSizeMB == 77 {
+		test := 7
+		test += 656
+	}
+	if in.Ttl != "" {
+		test := 2345
+		test += 567
+	}
 	if err := dec(in); err != nil {
 		return nil, err
 	}

weed/server/master_grpc_server_volume.go

@@ -69,6 +69,7 @@ func (ms *MasterServer) Assign(ctx context.Context, req *master_pb.AssignRequest
 		DataCenter:         req.DataCenter,
 		Rack:               req.Rack,
 		DataNode:           req.DataNode,
+		MemoryMapMaxSizeMB: req.MemoryMapMaxSizeMB,
 	}
 
 	if !ms.Topo.HasWritableVolume(option) {

weed/server/master_server_handlers_admin.go

@@ -148,6 +148,11 @@ func (ms *MasterServer) getVolumeGrowOption(r *http.Request) (*topology.VolumeGr
 	if err != nil {
 		return nil, err
 	}
+	memoryMapMaxSizeMB, err := needle.ReadMemoryMapMaxSizeMB(r.FormValue("memorymapmaxsizemb"))
+	if err != nil {
+		return nil, err
+	}
+
 	preallocate := ms.preallocateSize
 	if r.FormValue("preallocate") != "" {
 		preallocate, err = strconv.ParseInt(r.FormValue("preallocate"), 10, 64)
@@ -163,6 +168,7 @@ func (ms *MasterServer) getVolumeGrowOption(r *http.Request) (*topology.VolumeGr
 		DataCenter:         r.FormValue("dataCenter"),
 		Rack:               r.FormValue("rack"),
 		DataNode:           r.FormValue("dataNode"),
+		MemoryMapMaxSizeMB: memoryMapMaxSizeMB,
 	}
 	return volumeGrowOption, nil
 }

weed/server/volume_grpc_admin.go

@@ -35,7 +35,7 @@ func (vs *VolumeServer) AllocateVolume(ctx context.Context, req *volume_server_p
 		req.Replication,
 		req.Ttl,
 		req.Preallocate,
-		req.InMemory,
+		req.MemoryMapMaxSizeMB,
 	)
 
 	if err != nil {

weed/storage/disk_location.go

@@ -60,7 +60,7 @@ func (l *DiskLocation) loadExistingVolume(fileInfo os.FileInfo, needleMapKind Ne
 			_, found := l.volumes[vid]
 			l.RUnlock()
 			if !found {
-				if v, e := NewVolume(l.Directory, collection, vid, needleMapKind, nil, nil, 0, false); e == nil {
+				if v, e := NewVolume(l.Directory, collection, vid, needleMapKind, nil, nil, 0, 0); e == nil {
 					l.Lock()
 					l.volumes[vid] = v
 					l.Unlock()

weed/storage/needle/volume_memory_map_max_size.go

@@ -0,0 +1,14 @@
+package needle
+
+import "strconv"
+
+func ReadMemoryMapMaxSizeMB(MemoryMapMaxSizeMBString string) (uint32, error) {
+	if MemoryMapMaxSizeMBString == "" {
+		return 0, nil
+	}
+	var MemoryMapMaxSize64 uint64
+	var err error
+	MemoryMapMaxSize64, err = strconv.ParseUint(MemoryMapMaxSizeMBString, 10, 32)
+	MemoryMapMaxSize := uint32(MemoryMapMaxSize64)
+	return MemoryMapMaxSize, err
+}

weed/storage/needle/volume_memory_map_max_size_test.go

@@ -0,0 +1,10 @@
+package needle
+
+import "testing"
+
+func TestMemoryMapMaxSizeReadWrite(t *testing.T) {
+	memoryMapSize, _ := ReadMemoryMapMaxSizeMB("5000")
+	if memoryMapSize != 5000 {
+		t.Errorf("empty memoryMapSize:%v", memoryMapSize)
+	}
+}

weed/storage/store.go

@@ -59,7 +59,7 @@ func NewStore(grpcDialOption grpc.DialOption, port int, ip, publicUrl string, di
 
 	return
 }
-func (s *Store) AddVolume(volumeId needle.VolumeId, collection string, needleMapKind NeedleMapType, replicaPlacement string, ttlString string, preallocate int64, memoryMapped bool) error {
+func (s *Store) AddVolume(volumeId needle.VolumeId, collection string, needleMapKind NeedleMapType, replicaPlacement string, ttlString string, preallocate int64, memoryMapped uint32) error {
 	rt, e := NewReplicaPlacementFromString(replicaPlacement)
 	if e != nil {
 		return e
@@ -101,7 +101,7 @@ func (s *Store) FindFreeLocation() (ret *DiskLocation) {
 	}
 	return ret
 }
-func (s *Store) addVolume(vid needle.VolumeId, collection string, needleMapKind NeedleMapType, replicaPlacement *ReplicaPlacement, ttl *needle.TTL, preallocate int64, memoryMapped bool) error {
+func (s *Store) addVolume(vid needle.VolumeId, collection string, needleMapKind NeedleMapType, replicaPlacement *ReplicaPlacement, ttl *needle.TTL, preallocate int64, memoryMapped uint32) error {
 	if s.findVolume(vid) != nil {
 		return fmt.Errorf("Volume Id %d already exists!", vid)
 	}

weed/storage/volume.go

@@ -25,7 +25,7 @@ type Volume struct {
 	nm            NeedleMapper
 	needleMapKind NeedleMapType
 	readOnly      bool
-	MemoryMapped  bool
+	MemoryMapped  uint32
 
 	SuperBlock
 
@@ -39,7 +39,7 @@ type Volume struct {
 	isCompacting bool
 }
 
-func NewVolume(dirname string, collection string, id needle.VolumeId, needleMapKind NeedleMapType, replicaPlacement *ReplicaPlacement, ttl *needle.TTL, preallocate int64, memoryMapped bool) (v *Volume, e error) {
+func NewVolume(dirname string, collection string, id needle.VolumeId, needleMapKind NeedleMapType, replicaPlacement *ReplicaPlacement, ttl *needle.TTL, preallocate int64, memoryMapped uint32) (v *Volume, e error) {
 	// if replicaPlacement is nil, the superblock will be loaded from disk
 	v = &Volume{dir: dirname, Collection: collection, Id: id, MemoryMapped: memoryMapped}
 	v.SuperBlock = SuperBlock{ReplicaPlacement: replicaPlacement, Ttl: ttl}

weed/storage/volume_create.go

@@ -8,7 +8,7 @@ import (
 	"github.com/joeslay/seaweedfs/weed/glog"
 )
 
-func createVolumeFile(fileName string, preallocate int64, useMemoryMap bool) (*os.File, error) {
+func createVolumeFile(fileName string, preallocate int64, useMemoryMap uint32) (*os.File, error) {
 	file, e = os.OpenFile(fileName, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
 	if preallocate > 0 {
 		glog.V(0).Infof("Preallocated disk space for %s is not supported", fileName)

weed/storage/volume_create_linux.go

@@ -9,7 +9,7 @@ import (
 	"github.com/joeslay/seaweedfs/weed/glog"
 )
 
-func createVolumeFile(fileName string, preallocate int64, useMemoryMap bool) (file *os.File, e error) {
+func createVolumeFile(fileName string, preallocate int64, useMemoryMap uint32) (file *os.File, e error) {
 	file, e = os.OpenFile(fileName, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
 	if preallocate != 0 {
 		syscall.Fallocate(int(file.Fd()), 1, 0, preallocate)

weed/storage/volume_create_windows.go

@@ -12,12 +12,12 @@ import (
 	"github.com/joeslay/seaweedfs/weed/os_overloads"
 )
 
-func createVolumeFile(fileName string, preallocate int64, useMemoryMap bool) (*os.File, error) {
+func createVolumeFile(fileName string, preallocate int64, useMemoryMap uint32) (*os.File, error) {
 
 	mMap, exists := memory_map.FileMemoryMap[fileName]
 	if !exists {
-		file, e := os_overloads.OpenFile(fileName, windows.O_RDWR|windows.O_CREAT, 0644, useMemoryMap)
-		if useMemoryMap {
+		file, e := os_overloads.OpenFile(fileName, windows.O_RDWR|windows.O_CREAT, 0644, useMemoryMap > 0)
+		if useMemoryMap > 0 {
 			memory_map.FileMemoryMap[fileName] = new(memory_map.MemoryMap)
 
 			new_mMap := memory_map.FileMemoryMap[fileName]

weed/storage/volume_vacuum.go

@@ -23,7 +23,7 @@ func (v *Volume) garbageLevel() float64 {
 
 func (v *Volume) Compact(preallocate int64, compactionBytePerSecond int64) error {
 
-	if !v.MemoryMapped { //it makes no sense to compact in memory
+	if v.MemoryMapped > 0 { //it makes no sense to compact in memory
 		glog.V(3).Infof("Compacting volume %d ...", v.Id)
 		//no need to lock for copy on write
 		//v.accessLock.Lock()
@@ -46,7 +46,7 @@ func (v *Volume) Compact(preallocate int64, compactionBytePerSecond int64) error
 
 func (v *Volume) Compact2() error {
 
-	if !v.MemoryMapped { //it makes no sense to compact in memory
+	if v.MemoryMapped > 0 { //it makes no sense to compact in memory
 		glog.V(3).Infof("Compact2 volume %d ...", v.Id)
 
 		v.isCompacting = true
@@ -63,7 +63,7 @@ func (v *Volume) Compact2() error {
 }
 
 func (v *Volume) CommitCompact() error {
-	if !v.MemoryMapped { //it makes no sense to compact in memory
+	if v.MemoryMapped>0 { //it makes no sense to compact in memory
 		glog.V(0).Infof("Committing volume %d vacuuming...", v.Id)
 
 		v.isCompacting = true

weed/topology/allocate_volume.go

@@ -23,7 +23,7 @@ func AllocateVolume(dn *DataNode, grpcDialOption grpc.DialOption, vid needle.Vol
 			Replication:        option.ReplicaPlacement.String(),
 			Ttl:                option.Ttl.String(),
 			Preallocate:        option.Prealloacte,
-			InMemory:    option.InMemory,
+			MemoryMapMaxSizeMB: option.MemoryMapMaxSizeMB,
 		})
 		return deleteErr
 	})

weed/topology/volume_growth.go

@@ -28,7 +28,7 @@ type VolumeGrowOption struct {
 	DataCenter         string
 	Rack               string
 	DataNode           string
-	InMemory         bool
+	MemoryMapMaxSizeMB uint32
 }
 
 type VolumeGrowth struct {