frostfs-node/pkg/local_object_storage/writecache/state.go
Evgenii Stratonikov 4b768fd115 [#381] *: Move to sync/atomic
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
2023-05-23 08:18:01 +03:00

73 lines
1.2 KiB
Go

package writecache
import (
"fmt"
"math"
"sync/atomic"
"go.etcd.io/bbolt"
)
func (c *cache) estimateCacheSize() uint64 {
return c.objCounters.DB()*c.smallObjectSize + c.objCounters.FS()*c.maxObjectSize
}
func (c *cache) incSizeDB(sz uint64) uint64 {
return sz + c.smallObjectSize
}
func (c *cache) incSizeFS(sz uint64) uint64 {
return sz + c.maxObjectSize
}
type counters struct {
cDB, cFS atomic.Uint64
}
func (x *counters) IncDB() {
x.cDB.Add(1)
}
func (x *counters) DecDB() {
x.cDB.Add(math.MaxUint64)
}
func (x *counters) DB() uint64 {
return x.cDB.Load()
}
func (x *counters) IncFS() {
x.cFS.Add(1)
}
func (x *counters) DecFS() {
x.cFS.Add(math.MaxUint64)
}
func (x *counters) FS() uint64 {
return x.cFS.Load()
}
func (c *cache) initCounters() error {
var inDB uint64
err := c.db.View(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
if b != nil {
inDB = uint64(b.Stats().KeyN)
}
return nil
})
if err != nil {
return fmt.Errorf("could not read write-cache DB counter: %w", err)
}
inFS, err := c.fsTree.NumberOfObjects()
if err != nil {
return fmt.Errorf("could not read write-cache FS counter: %w", err)
}
c.objCounters.cDB.Store(inDB)
c.objCounters.cFS.Store(inFS)
return nil
}