forked from TrueCloudLab/frostfs-node
73 lines
1.2 KiB
Go
73 lines
1.2 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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"go.etcd.io/bbolt"
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)
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func (c *cache) estimateCacheSize() uint64 {
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return c.objCounters.DB()*c.smallObjectSize + c.objCounters.FS()*c.maxObjectSize
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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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type counters struct {
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cDB, cFS atomic.Uint64
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}
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func (x *counters) IncDB() {
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x.cDB.Add(1)
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}
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func (x *counters) DecDB() {
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x.cDB.Add(math.MaxUint64)
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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) IncFS() {
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x.cFS.Add(1)
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}
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func (x *counters) DecFS() {
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x.cFS.Add(math.MaxUint64)
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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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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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inFS, err := c.fsTree.NumberOfObjects()
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if err != nil {
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return fmt.Errorf("could not read write-cache FS counter: %w", err)
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}
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c.objCounters.cDB.Store(inDB)
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c.objCounters.cFS.Store(inFS)
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return nil
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}
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