frostfs-node/pkg/local_object_storage/writecache/writecachebadger/state.go

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package writecachebadger
import (
"fmt"
"math"
"sync/atomic"
"github.com/dgraph-io/badger/v4"
)
func (c *cache) estimateCacheSize() uint64 {
onDiskSize, _ := c.db.EstimateSize(nil)
c.metrics.SetEstimateSize(onDiskSize, 0)
return onDiskSize
}
func (c *cache) incSizeDB(sz uint64) uint64 {
return sz + c.maxObjectSize
}
type counters struct {
cDB 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 (c *cache) initCounters() error {
var inDB uint64
err := c.db.View(func(tx *badger.Txn) error {
opts := badger.DefaultIteratorOptions
opts.PrefetchValues = false
it := tx.NewIterator(opts)
defer it.Close()
for it.Rewind(); it.Valid(); it.Next() {
inDB++
}
return nil
})
if err != nil {
return fmt.Errorf("could not read write-cache DB counter: %w", err)
}
c.objCounters.cDB.Store(inDB)
c.metrics.SetActualCounters(inDB, 0)
return nil
}
func (c *cache) incDB() {
c.objCounters.IncDB()
c.metrics.SetActualCounters(c.objCounters.DB(), 0)
}
func (c *cache) decDB() {
c.objCounters.DecDB()
c.metrics.SetActualCounters(c.objCounters.DB(), 0)
}