frostfs-node/pkg/local_object_storage/metabase/counter.go

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package meta
import (
"bytes"
"context"
"encoding/binary"
"errors"
"fmt"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/metaerr"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"go.etcd.io/bbolt"
)
var (
objectPhyCounterKey = []byte("phy_counter")
objectLogicCounterKey = []byte("logic_counter")
objectUserCounterKey = []byte("user_counter")
)
type objectType uint8
const (
_ objectType = iota
phy
logical
)
// ObjectCounters groups object counter
// according to metabase state.
type ObjectCounters struct {
Logic uint64
Phy uint64
User uint64
}
func (o ObjectCounters) IsZero() bool {
return o.Phy == 0 && o.Logic == 0 && o.User == 0
}
// ObjectCounters returns object counters that metabase has
// tracked since it was opened and initialized.
//
// Returns only the errors that do not allow reading counter
// in Bolt database.
func (db *DB) ObjectCounters() (cc ObjectCounters, err error) {
db.modeMtx.RLock()
defer db.modeMtx.RUnlock()
if db.mode.NoMetabase() {
return ObjectCounters{}, ErrDegradedMode
}
err = db.boltDB.View(func(tx *bbolt.Tx) error {
b := tx.Bucket(shardInfoBucket)
if b != nil {
data := b.Get(objectPhyCounterKey)
if len(data) == 8 {
cc.Phy = binary.LittleEndian.Uint64(data)
}
data = b.Get(objectLogicCounterKey)
if len(data) == 8 {
cc.Logic = binary.LittleEndian.Uint64(data)
}
data = b.Get(objectUserCounterKey)
if len(data) == 8 {
cc.User = binary.LittleEndian.Uint64(data)
}
}
return nil
})
return cc, metaerr.Wrap(err)
}
type ContainerCounters struct {
Counts map[cid.ID]ObjectCounters
}
// ContainerCounters returns object counters for each container
// that metabase has tracked since it was opened and initialized.
//
// Returns only the errors that do not allow reading counter
// in Bolt database.
//
// It is guaranteed that the ContainerCounters fields are not nil.
func (db *DB) ContainerCounters(ctx context.Context) (ContainerCounters, error) {
var (
startedAt = time.Now()
success = false
)
defer func() {
db.metrics.AddMethodDuration("ContainerCounters", time.Since(startedAt), success)
}()
ctx, span := tracing.StartSpanFromContext(ctx, "metabase.ContainerCounters")
defer span.End()
cc := ContainerCounters{
Counts: make(map[cid.ID]ObjectCounters),
}
lastKey := make([]byte, cidSize)
// there is no limit for containers count, so use batching with cancellation
for {
select {
case <-ctx.Done():
return cc, ctx.Err()
default:
}
completed, err := db.containerCountersNextBatch(lastKey, &cc)
if err != nil {
return cc, err
}
if completed {
break
}
}
success = true
return cc, nil
}
func (db *DB) containerCountersNextBatch(lastKey []byte, cc *ContainerCounters) (bool, error) {
db.modeMtx.RLock()
defer db.modeMtx.RUnlock()
if db.mode.NoMetabase() {
return false, ErrDegradedMode
}
counter := 0
const batchSize = 1000
err := db.boltDB.View(func(tx *bbolt.Tx) error {
b := tx.Bucket(containerCounterBucketName)
if b == nil {
return ErrInterruptIterator
}
c := b.Cursor()
var key, value []byte
for key, value = c.Seek(lastKey); key != nil; key, value = c.Next() {
if bytes.Equal(lastKey, key) {
continue
}
copy(lastKey, key)
cnrID, err := parseContainerCounterKey(key)
if err != nil {
return err
}
ent, err := parseContainerCounterValue(value)
if err != nil {
return err
}
cc.Counts[cnrID] = ent
counter++
if counter == batchSize {
break
}
}
if counter < batchSize { // last batch
return ErrInterruptIterator
}
return nil
})
if err != nil {
if errors.Is(err, ErrInterruptIterator) {
return true, nil
}
return false, metaerr.Wrap(err)
}
return false, nil
}
func (db *DB) incCounters(tx *bbolt.Tx, cnrID cid.ID) error {
if err := db.updateShardObjectCounter(tx, phy, 1, true); err != nil {
return fmt.Errorf("could not increase phy object counter: %w", err)
}
if err := db.updateShardObjectCounter(tx, logical, 1, true); err != nil {
return fmt.Errorf("could not increase logical object counter: %w", err)
}
return db.incContainerObjectCounter(tx, cnrID)
}
func (db *DB) updateShardObjectCounter(tx *bbolt.Tx, typ objectType, delta uint64, inc bool) error {
b := tx.Bucket(shardInfoBucket)
if b == nil {
return nil
}
var counter uint64
var counterKey []byte
switch typ {
case phy:
counterKey = objectPhyCounterKey
case logical:
counterKey = objectLogicCounterKey
default:
panic("unknown object type counter")
}
data := b.Get(counterKey)
if len(data) == 8 {
counter = binary.LittleEndian.Uint64(data)
}
if inc {
counter += delta
} else if counter <= delta {
counter = 0
} else {
counter -= delta
}
newCounter := make([]byte, 8)
binary.LittleEndian.PutUint64(newCounter, counter)
return b.Put(counterKey, newCounter)
}
func (db *DB) updateContainerCounter(tx *bbolt.Tx, delta map[cid.ID]ObjectCounters, inc bool) error {
b := tx.Bucket(containerCounterBucketName)
if b == nil {
return nil
}
key := make([]byte, cidSize)
for cnrID, cnrDelta := range delta {
cnrID.Encode(key)
if err := db.editContainerCounterValue(b, key, cnrDelta, inc); err != nil {
return err
}
}
return nil
}
func (*DB) editContainerCounterValue(b *bbolt.Bucket, key []byte, delta ObjectCounters, inc bool) error {
var entity ObjectCounters
var err error
data := b.Get(key)
if len(data) > 0 {
entity, err = parseContainerCounterValue(data)
if err != nil {
return err
}
}
entity.Phy = nextValue(entity.Phy, delta.Phy, inc)
entity.Logic = nextValue(entity.Logic, delta.Logic, inc)
entity.User = nextValue(entity.User, delta.User, inc)
if entity.IsZero() {
return b.Delete(key)
}
value := containerCounterValue(entity)
return b.Put(key, value)
}
func nextValue(existed, delta uint64, inc bool) uint64 {
if inc {
existed += delta
} else if existed <= delta {
existed = 0
} else {
existed -= delta
}
return existed
}
func (db *DB) incContainerObjectCounter(tx *bbolt.Tx, cnrID cid.ID) error {
b := tx.Bucket(containerCounterBucketName)
if b == nil {
return nil
}
key := make([]byte, cidSize)
cnrID.Encode(key)
return db.editContainerCounterValue(b, key, ObjectCounters{Logic: 1, Phy: 1}, true)
}
// syncCounter updates object counters according to metabase state:
// it counts all the physically/logically stored objects using internal
// indexes. Tx MUST be writable.
//
// Does nothing if counters are not empty and force is false. If force is
// true, updates the counters anyway.
func syncCounter(tx *bbolt.Tx, force bool) error {
shardInfoB, err := tx.CreateBucketIfNotExists(shardInfoBucket)
if err != nil {
return fmt.Errorf("could not get shard info bucket: %w", err)
}
shardObjectCounterInitialized := len(shardInfoB.Get(objectPhyCounterKey)) == 8 &&
len(shardInfoB.Get(objectLogicCounterKey)) == 8 &&
len(shardInfoB.Get(objectUserCounterKey)) == 8
containerObjectCounterInitialized := containerObjectCounterInitialized(tx)
if !force && shardObjectCounterInitialized && containerObjectCounterInitialized {
// the counters are already inited
return nil
}
containerCounterB, err := tx.CreateBucketIfNotExists(containerCounterBucketName)
if err != nil {
return fmt.Errorf("could not get container counter bucket: %w", err)
}
var addr oid.Address
counters := make(map[cid.ID]ObjectCounters)
graveyardBKT := tx.Bucket(graveyardBucketName)
garbageBKT := tx.Bucket(garbageBucketName)
key := make([]byte, addressKeySize)
err = iteratePhyObjects(tx, func(cnr cid.ID, obj oid.ID) error {
if v, ok := counters[cnr]; ok {
v.Phy++
counters[cnr] = v
} else {
counters[cnr] = ObjectCounters{
Phy: 1,
}
}
addr.SetContainer(cnr)
addr.SetObject(obj)
// check if an object is available: not with GCMark
// and not covered with a tombstone
if inGraveyardWithKey(addressKey(addr, key), graveyardBKT, garbageBKT) == 0 {
if v, ok := counters[cnr]; ok {
v.Logic++
counters[cnr] = v
} else {
counters[cnr] = ObjectCounters{
Logic: 1,
}
}
}
return nil
})
if err != nil {
return fmt.Errorf("could not iterate objects: %w", err)
}
return setObjectCounters(counters, shardInfoB, containerCounterB)
}
func setObjectCounters(counters map[cid.ID]ObjectCounters, shardInfoB, containerCounterB *bbolt.Bucket) error {
var phyTotal uint64
var logicTotal uint64
var userTotal uint64
key := make([]byte, cidSize)
for cnrID, count := range counters {
phyTotal += count.Phy
logicTotal += count.Logic
userTotal += count.User
cnrID.Encode(key)
value := containerCounterValue(count)
err := containerCounterB.Put(key, value)
if err != nil {
return fmt.Errorf("could not update phy container object counter: %w", err)
}
}
phyData := make([]byte, 8)
binary.LittleEndian.PutUint64(phyData, phyTotal)
err := shardInfoB.Put(objectPhyCounterKey, phyData)
if err != nil {
return fmt.Errorf("could not update phy object counter: %w", err)
}
logData := make([]byte, 8)
binary.LittleEndian.PutUint64(logData, logicTotal)
err = shardInfoB.Put(objectLogicCounterKey, logData)
if err != nil {
return fmt.Errorf("could not update logic object counter: %w", err)
}
userData := make([]byte, 8)
binary.LittleEndian.PutUint64(userData, userTotal)
err = shardInfoB.Put(objectUserCounterKey, userData)
if err != nil {
return fmt.Errorf("could not update user object counter: %w", err)
}
return nil
}
func containerCounterValue(entity ObjectCounters) []byte {
res := make([]byte, 24)
binary.LittleEndian.PutUint64(res, entity.Phy)
binary.LittleEndian.PutUint64(res[8:], entity.Logic)
binary.LittleEndian.PutUint64(res[16:], entity.User)
return res
}
func parseContainerCounterKey(buf []byte) (cid.ID, error) {
if len(buf) != cidSize {
return cid.ID{}, fmt.Errorf("invalid key length")
}
var cnrID cid.ID
if err := cnrID.Decode(buf); err != nil {
return cid.ID{}, fmt.Errorf("failed to decode container ID: %w", err)
}
return cnrID, nil
}
// parseContainerCounterValue return phy, logic values.
func parseContainerCounterValue(buf []byte) (ObjectCounters, error) {
if len(buf) != 24 {
return ObjectCounters{}, fmt.Errorf("invalid value length")
}
return ObjectCounters{
Phy: binary.LittleEndian.Uint64(buf),
Logic: binary.LittleEndian.Uint64(buf[8:16]),
User: binary.LittleEndian.Uint64(buf[16:]),
}, nil
}
func containerObjectCounterInitialized(tx *bbolt.Tx) bool {
b := tx.Bucket(containerCounterBucketName)
if b == nil {
return false
}
k, v := b.Cursor().First()
if k == nil && v == nil {
return true
}
_, err := parseContainerCounterKey(k)
if err != nil {
return false
}
_, err = parseContainerCounterValue(v)
return err == nil
}