mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
437 lines
11 KiB
Go
437 lines
11 KiB
Go
package topology
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"math/rand"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/chrislusf/seaweedfs/weed/util/log"
|
|
"github.com/chrislusf/seaweedfs/weed/storage"
|
|
"github.com/chrislusf/seaweedfs/weed/storage/needle"
|
|
"github.com/chrislusf/seaweedfs/weed/storage/super_block"
|
|
)
|
|
|
|
type copyState int
|
|
|
|
const (
|
|
noCopies copyState = 0 + iota
|
|
insufficientCopies
|
|
enoughCopies
|
|
)
|
|
|
|
type volumeState string
|
|
|
|
const (
|
|
readOnlyState volumeState = "ReadOnly"
|
|
oversizedState = "Oversized"
|
|
)
|
|
|
|
type stateIndicator func(copyState) bool
|
|
|
|
func ExistCopies() stateIndicator {
|
|
return func(state copyState) bool { return state != noCopies }
|
|
}
|
|
|
|
func NoCopies() stateIndicator {
|
|
return func(state copyState) bool { return state == noCopies }
|
|
}
|
|
|
|
type volumesBinaryState struct {
|
|
rp *super_block.ReplicaPlacement
|
|
name volumeState // the name for volume state (eg. "Readonly", "Oversized")
|
|
indicator stateIndicator // indicate whether the volumes should be marked as `name`
|
|
copyMap map[needle.VolumeId]*VolumeLocationList
|
|
}
|
|
|
|
func NewVolumesBinaryState(name volumeState, rp *super_block.ReplicaPlacement, indicator stateIndicator) *volumesBinaryState {
|
|
return &volumesBinaryState{
|
|
rp: rp,
|
|
name: name,
|
|
indicator: indicator,
|
|
copyMap: make(map[needle.VolumeId]*VolumeLocationList),
|
|
}
|
|
}
|
|
|
|
func (v *volumesBinaryState) Dump() (res []uint32) {
|
|
for vid, list := range v.copyMap {
|
|
if v.indicator(v.copyState(list)) {
|
|
res = append(res, uint32(vid))
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (v *volumesBinaryState) IsTrue(vid needle.VolumeId) bool {
|
|
list, _ := v.copyMap[vid]
|
|
return v.indicator(v.copyState(list))
|
|
}
|
|
|
|
func (v *volumesBinaryState) Add(vid needle.VolumeId, dn *DataNode) {
|
|
list, _ := v.copyMap[vid]
|
|
if list != nil {
|
|
list.Set(dn)
|
|
return
|
|
}
|
|
list = NewVolumeLocationList()
|
|
list.Set(dn)
|
|
v.copyMap[vid] = list
|
|
}
|
|
|
|
func (v *volumesBinaryState) Remove(vid needle.VolumeId, dn *DataNode) {
|
|
list, _ := v.copyMap[vid]
|
|
if list != nil {
|
|
list.Remove(dn)
|
|
if list.Length() == 0 {
|
|
delete(v.copyMap, vid)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (v *volumesBinaryState) copyState(list *VolumeLocationList) copyState {
|
|
if list == nil {
|
|
return noCopies
|
|
}
|
|
if list.Length() < v.rp.GetCopyCount() {
|
|
return insufficientCopies
|
|
}
|
|
return enoughCopies
|
|
}
|
|
|
|
// mapping from volume to its locations, inverted from server to volume
|
|
type VolumeLayout struct {
|
|
rp *super_block.ReplicaPlacement
|
|
ttl *needle.TTL
|
|
vid2location map[needle.VolumeId]*VolumeLocationList
|
|
writables []needle.VolumeId // transient array of writable volume id
|
|
readonlyVolumes *volumesBinaryState // readonly volumes
|
|
oversizedVolumes *volumesBinaryState // oversized volumes
|
|
volumeSizeLimit uint64
|
|
replicationAsMin bool
|
|
accessLock sync.RWMutex
|
|
}
|
|
|
|
type VolumeLayoutStats struct {
|
|
TotalSize uint64
|
|
UsedSize uint64
|
|
FileCount uint64
|
|
}
|
|
|
|
func NewVolumeLayout(rp *super_block.ReplicaPlacement, ttl *needle.TTL, volumeSizeLimit uint64, replicationAsMin bool) *VolumeLayout {
|
|
return &VolumeLayout{
|
|
rp: rp,
|
|
ttl: ttl,
|
|
vid2location: make(map[needle.VolumeId]*VolumeLocationList),
|
|
writables: *new([]needle.VolumeId),
|
|
readonlyVolumes: NewVolumesBinaryState(readOnlyState, rp, ExistCopies()),
|
|
oversizedVolumes: NewVolumesBinaryState(oversizedState, rp, ExistCopies()),
|
|
volumeSizeLimit: volumeSizeLimit,
|
|
replicationAsMin: replicationAsMin,
|
|
}
|
|
}
|
|
|
|
func (vl *VolumeLayout) String() string {
|
|
return fmt.Sprintf("rp:%v, ttl:%v, vid2location:%v, writables:%v, volumeSizeLimit:%v", vl.rp, vl.ttl, vl.vid2location, vl.writables, vl.volumeSizeLimit)
|
|
}
|
|
|
|
func (vl *VolumeLayout) RegisterVolume(v *storage.VolumeInfo, dn *DataNode) {
|
|
vl.accessLock.Lock()
|
|
defer vl.accessLock.Unlock()
|
|
|
|
defer vl.ensureCorrectWritables(v.Id)
|
|
defer vl.rememberOversizedVolume(v, dn)
|
|
|
|
if _, ok := vl.vid2location[v.Id]; !ok {
|
|
vl.vid2location[v.Id] = NewVolumeLocationList()
|
|
}
|
|
vl.vid2location[v.Id].Set(dn)
|
|
// log.Tracef("volume %d added to %s len %d copy %d", v.Id, dn.Id(), vl.vid2location[v.Id].Length(), v.ReplicaPlacement.GetCopyCount())
|
|
for _, dn := range vl.vid2location[v.Id].list {
|
|
if vInfo, err := dn.GetVolumesById(v.Id); err == nil {
|
|
if vInfo.ReadOnly {
|
|
log.Debugf("vid %d removed from writable", v.Id)
|
|
vl.removeFromWritable(v.Id)
|
|
vl.readonlyVolumes.Add(v.Id, dn)
|
|
return
|
|
} else {
|
|
vl.readonlyVolumes.Remove(v.Id, dn)
|
|
}
|
|
} else {
|
|
log.Debugf("vid %d removed from writable", v.Id)
|
|
vl.removeFromWritable(v.Id)
|
|
vl.readonlyVolumes.Remove(v.Id, dn)
|
|
return
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
func (vl *VolumeLayout) rememberOversizedVolume(v *storage.VolumeInfo, dn *DataNode) {
|
|
if vl.isOversized(v) {
|
|
vl.oversizedVolumes.Add(v.Id, dn)
|
|
} else {
|
|
vl.oversizedVolumes.Remove(v.Id, dn)
|
|
}
|
|
}
|
|
|
|
func (vl *VolumeLayout) UnRegisterVolume(v *storage.VolumeInfo, dn *DataNode) {
|
|
vl.accessLock.Lock()
|
|
defer vl.accessLock.Unlock()
|
|
|
|
// remove from vid2location map
|
|
location, ok := vl.vid2location[v.Id]
|
|
if !ok {
|
|
return
|
|
}
|
|
|
|
if location.Remove(dn) {
|
|
|
|
vl.readonlyVolumes.Remove(v.Id, dn)
|
|
vl.oversizedVolumes.Remove(v.Id, dn)
|
|
vl.ensureCorrectWritables(v.Id)
|
|
|
|
if location.Length() == 0 {
|
|
delete(vl.vid2location, v.Id)
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
func (vl *VolumeLayout) EnsureCorrectWritables(v *storage.VolumeInfo) {
|
|
vl.accessLock.Lock()
|
|
defer vl.accessLock.Unlock()
|
|
|
|
vl.ensureCorrectWritables(v.Id)
|
|
}
|
|
|
|
func (vl *VolumeLayout) ensureCorrectWritables(vid needle.VolumeId) {
|
|
if vl.enoughCopies(vid) && vl.isAllWritable(vid) {
|
|
if !vl.oversizedVolumes.IsTrue(vid) {
|
|
vl.setVolumeWritable(vid)
|
|
}
|
|
} else {
|
|
vl.removeFromWritable(vid)
|
|
}
|
|
}
|
|
|
|
func (vl *VolumeLayout) isAllWritable(vid needle.VolumeId) bool {
|
|
for _, dn := range vl.vid2location[vid].list {
|
|
if v, found := dn.volumes[vid]; found {
|
|
if v.ReadOnly {
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (vl *VolumeLayout) isOversized(v *storage.VolumeInfo) bool {
|
|
return uint64(v.Size) >= vl.volumeSizeLimit
|
|
}
|
|
|
|
func (vl *VolumeLayout) isWritable(v *storage.VolumeInfo) bool {
|
|
return !vl.isOversized(v) &&
|
|
v.Version == needle.CurrentVersion &&
|
|
!v.ReadOnly
|
|
}
|
|
|
|
func (vl *VolumeLayout) isEmpty() bool {
|
|
vl.accessLock.RLock()
|
|
defer vl.accessLock.RUnlock()
|
|
|
|
return len(vl.vid2location) == 0
|
|
}
|
|
|
|
func (vl *VolumeLayout) Lookup(vid needle.VolumeId) []*DataNode {
|
|
vl.accessLock.RLock()
|
|
defer vl.accessLock.RUnlock()
|
|
|
|
if location := vl.vid2location[vid]; location != nil {
|
|
return location.list
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (vl *VolumeLayout) ListVolumeServers() (nodes []*DataNode) {
|
|
vl.accessLock.RLock()
|
|
defer vl.accessLock.RUnlock()
|
|
|
|
for _, location := range vl.vid2location {
|
|
nodes = append(nodes, location.list...)
|
|
}
|
|
return
|
|
}
|
|
|
|
func (vl *VolumeLayout) PickForWrite(count uint64, option *VolumeGrowOption) (*needle.VolumeId, uint64, *VolumeLocationList, error) {
|
|
vl.accessLock.RLock()
|
|
defer vl.accessLock.RUnlock()
|
|
|
|
lenWriters := len(vl.writables)
|
|
if lenWriters <= 0 {
|
|
log.Infoln("No more writable volumes!")
|
|
return nil, 0, nil, errors.New("No more writable volumes!")
|
|
}
|
|
if option.DataCenter == "" {
|
|
vid := vl.writables[rand.Intn(lenWriters)]
|
|
locationList := vl.vid2location[vid]
|
|
if locationList != nil {
|
|
return &vid, count, locationList, nil
|
|
}
|
|
return nil, 0, nil, errors.New("Strangely vid " + vid.String() + " is on no machine!")
|
|
}
|
|
var vid needle.VolumeId
|
|
var locationList *VolumeLocationList
|
|
counter := 0
|
|
for _, v := range vl.writables {
|
|
volumeLocationList := vl.vid2location[v]
|
|
for _, dn := range volumeLocationList.list {
|
|
if dn.GetDataCenter().Id() == NodeId(option.DataCenter) {
|
|
if option.Rack != "" && dn.GetRack().Id() != NodeId(option.Rack) {
|
|
continue
|
|
}
|
|
if option.DataNode != "" && dn.Id() != NodeId(option.DataNode) {
|
|
continue
|
|
}
|
|
counter++
|
|
if rand.Intn(counter) < 1 {
|
|
vid, locationList = v, volumeLocationList
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return &vid, count, locationList, nil
|
|
}
|
|
|
|
func (vl *VolumeLayout) GetActiveVolumeCount(option *VolumeGrowOption) int {
|
|
vl.accessLock.RLock()
|
|
defer vl.accessLock.RUnlock()
|
|
|
|
if option.DataCenter == "" {
|
|
return len(vl.writables)
|
|
}
|
|
counter := 0
|
|
for _, v := range vl.writables {
|
|
for _, dn := range vl.vid2location[v].list {
|
|
if dn.GetDataCenter().Id() == NodeId(option.DataCenter) {
|
|
if option.Rack != "" && dn.GetRack().Id() != NodeId(option.Rack) {
|
|
continue
|
|
}
|
|
if option.DataNode != "" && dn.Id() != NodeId(option.DataNode) {
|
|
continue
|
|
}
|
|
counter++
|
|
}
|
|
}
|
|
}
|
|
return counter
|
|
}
|
|
|
|
func (vl *VolumeLayout) removeFromWritable(vid needle.VolumeId) bool {
|
|
toDeleteIndex := -1
|
|
for k, id := range vl.writables {
|
|
if id == vid {
|
|
toDeleteIndex = k
|
|
break
|
|
}
|
|
}
|
|
if toDeleteIndex >= 0 {
|
|
log.Infoln("Volume", vid, "becomes unwritable")
|
|
vl.writables = append(vl.writables[0:toDeleteIndex], vl.writables[toDeleteIndex+1:]...)
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
func (vl *VolumeLayout) setVolumeWritable(vid needle.VolumeId) bool {
|
|
for _, v := range vl.writables {
|
|
if v == vid {
|
|
return false
|
|
}
|
|
}
|
|
log.Infoln("Volume", vid, "becomes writable")
|
|
vl.writables = append(vl.writables, vid)
|
|
return true
|
|
}
|
|
|
|
func (vl *VolumeLayout) SetVolumeUnavailable(dn *DataNode, vid needle.VolumeId) bool {
|
|
vl.accessLock.Lock()
|
|
defer vl.accessLock.Unlock()
|
|
|
|
if location, ok := vl.vid2location[vid]; ok {
|
|
if location.Remove(dn) {
|
|
vl.readonlyVolumes.Remove(vid, dn)
|
|
vl.oversizedVolumes.Remove(vid, dn)
|
|
if location.Length() < vl.rp.GetCopyCount() {
|
|
log.Infoln("Volume", vid, "has", location.Length(), "replica, less than required", vl.rp.GetCopyCount())
|
|
return vl.removeFromWritable(vid)
|
|
}
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
func (vl *VolumeLayout) SetVolumeAvailable(dn *DataNode, vid needle.VolumeId, isReadOnly bool) bool {
|
|
vl.accessLock.Lock()
|
|
defer vl.accessLock.Unlock()
|
|
|
|
vInfo, err := dn.GetVolumesById(vid)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
|
|
vl.vid2location[vid].Set(dn)
|
|
|
|
if vInfo.ReadOnly || isReadOnly {
|
|
return false
|
|
}
|
|
|
|
if vl.enoughCopies(vid) {
|
|
return vl.setVolumeWritable(vid)
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (vl *VolumeLayout) enoughCopies(vid needle.VolumeId) bool {
|
|
locations := vl.vid2location[vid].Length()
|
|
desired := vl.rp.GetCopyCount()
|
|
return locations == desired || (vl.replicationAsMin && locations > desired)
|
|
}
|
|
|
|
func (vl *VolumeLayout) SetVolumeCapacityFull(vid needle.VolumeId) bool {
|
|
vl.accessLock.Lock()
|
|
defer vl.accessLock.Unlock()
|
|
|
|
// log.Infoln("Volume", vid, "reaches full capacity.")
|
|
return vl.removeFromWritable(vid)
|
|
}
|
|
|
|
func (vl *VolumeLayout) ToMap() map[string]interface{} {
|
|
m := make(map[string]interface{})
|
|
m["replication"] = vl.rp.String()
|
|
m["ttl"] = vl.ttl.String()
|
|
m["writables"] = vl.writables
|
|
//m["locations"] = vl.vid2location
|
|
return m
|
|
}
|
|
|
|
func (vl *VolumeLayout) Stats() *VolumeLayoutStats {
|
|
vl.accessLock.RLock()
|
|
defer vl.accessLock.RUnlock()
|
|
|
|
ret := &VolumeLayoutStats{}
|
|
|
|
freshThreshold := time.Now().Unix() - 60
|
|
|
|
for vid, vll := range vl.vid2location {
|
|
size, fileCount := vll.Stats(vid, freshThreshold)
|
|
ret.FileCount += uint64(fileCount)
|
|
ret.UsedSize += size
|
|
if vl.readonlyVolumes.IsTrue(vid) {
|
|
ret.TotalSize += size
|
|
} else {
|
|
ret.TotalSize += vl.volumeSizeLimit
|
|
}
|
|
}
|
|
|
|
return ret
|
|
}
|