78 lines
1.5 KiB
Go
78 lines
1.5 KiB
Go
package writecache
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import (
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"fmt"
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"math"
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"sync/atomic"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/fstree"
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"go.etcd.io/bbolt"
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)
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func (c *cache) estimateCacheSize() uint64 {
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dbCount := c.objCounters.DB()
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fsCount := c.objCounters.FS()
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if fsCount > 0 {
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fsCount-- // db file
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}
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dbSize := dbCount * c.smallObjectSize
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fsSize := fsCount * c.maxObjectSize
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c.metrics.SetEstimateSize(dbSize, fsSize)
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c.metrics.SetActualCounters(dbCount, fsCount)
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return dbSize + fsSize
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}
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func (c *cache) incSizeDB(sz uint64) uint64 {
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return sz + c.smallObjectSize
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}
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func (c *cache) incSizeFS(sz uint64) uint64 {
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return sz + c.maxObjectSize
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}
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var _ fstree.FileCounter = &counters{}
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type counters struct {
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cDB, cFS atomic.Uint64
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}
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func (x *counters) DB() uint64 {
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return x.cDB.Load()
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}
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func (x *counters) FS() uint64 {
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return x.cFS.Load()
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}
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// Set implements fstree.ObjectCounter.
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func (x *counters) Set(v uint64) {
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x.cFS.Store(v)
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}
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// Inc implements fstree.ObjectCounter.
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func (x *counters) Inc() {
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x.cFS.Add(1)
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}
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// Dec implements fstree.ObjectCounter.
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func (x *counters) Dec() {
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x.cFS.Add(math.MaxUint64)
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}
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func (c *cache) initCounters() error {
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var inDB uint64
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err := c.db.View(func(tx *bbolt.Tx) error {
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b := tx.Bucket(defaultBucket)
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if b != nil {
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inDB = uint64(b.Stats().KeyN)
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}
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return nil
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})
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if err != nil {
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return fmt.Errorf("could not read write-cache DB counter: %w", err)
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}
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c.objCounters.cDB.Store(inDB)
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c.estimateCacheSize()
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return nil
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}
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