Revert "[#866] Use TTL for blobovnicza tree cache"

This reverts commit d9cbb16bd3.

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza.go

@@ -87,7 +87,7 @@ func NewBlobovniczaTree(opts ...Option) (blz *Blobovniczas) {
 
 	blz.commondbManager = newDBManager(blz.rootPath, blz.blzOpts, blz.readOnly, blz.metrics.Blobovnicza(), blz.log)
 	blz.activeDBManager = newActiveDBManager(blz.commondbManager, blz.blzLeafWidth)
-	blz.dbCache = newDBCache(blz.openedCacheSize, blz.openedCacheTTL, blz.commondbManager)
+	blz.dbCache = newDBCache(blz.openedCacheSize, blz.commondbManager)
 	blz.deleteProtectedObjects = newAddressMap()
 	blz.dbFilesGuard = &sync.RWMutex{}
 	blz.rebuildGuard = &sync.RWMutex{}

pkg/local_object_storage/blobstor/blobovniczatree/cache.go

@@ -1,11 +1,10 @@
 package blobovniczatree
 
 import (
+	"fmt"
 	"sync"
-	"time"
 
 	utilSync "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/sync"
-	"github.com/hashicorp/golang-lru/v2/expirable"
 	"github.com/hashicorp/golang-lru/v2/simplelru"
 )
 
@@ -23,10 +22,14 @@ type dbCache struct {
 	dbManager *dbManager
 }
 
-func newDBCache(size int, ttl time.Duration, dbManager *dbManager) *dbCache {
-	cache := expirable.NewLRU(size, func(_ string, evictedDB *sharedDB) {
+func newDBCache(size int, dbManager *dbManager) *dbCache {
+	cache, err := simplelru.NewLRU(size, func(_ string, evictedDB *sharedDB) {
 		evictedDB.Close()
-	}, ttl)
+	})
+	if err != nil {
+		// occurs only if the size is not positive
+		panic(fmt.Errorf("could not create LRU cache of size %d: %w", size, err))
+	}
 	return &dbCache{
 		cacheGuard: &sync.RWMutex{},
 		cache:      cache,

pkg/local_object_storage/blobstor/blobovniczatree/option.go

@@ -16,7 +16,6 @@ type cfg struct {
 	readOnly           bool
 	rootPath           string
 	openedCacheSize    int
-	openedCacheTTL     time.Duration
 	blzShallowDepth    uint64
 	blzShallowWidth    uint64
 	blzLeafWidth       uint64
@@ -35,7 +34,6 @@ type Option func(*cfg)
 const (
 	defaultPerm               = 0o700
 	defaultOpenedCacheSize    = 50
-	defaultOpenedCacheTTL     = 0 // means expiring is off
 	defaultBlzShallowDepth    = 2
 	defaultBlzShallowWidth    = 16
 	defaultWaitBeforeDropDB   = 10 * time.Second
@@ -48,7 +46,6 @@ func initConfig(c *cfg) {
 		log:                &logger.Logger{Logger: zap.L()},
 		perm:               defaultPerm,
 		openedCacheSize:    defaultOpenedCacheSize,
-		openedCacheTTL:     defaultOpenedCacheTTL,
 		blzShallowDepth:    defaultBlzShallowDepth,
 		blzShallowWidth:    defaultBlzShallowWidth,
 		reportError:        func(string, error) {},
@@ -108,12 +105,6 @@ func WithOpenedCacheSize(sz int) Option {
 	}
 }
 
-func WithOpenedCacheTTL(ttl time.Duration) Option {
-	return func(c *cfg) {
-		c.openedCacheTTL = ttl
-	}
-}
-
 func WithObjectSizeLimit(sz uint64) Option {
 	return func(c *cfg) {
 		c.blzOpts = append(c.blzOpts, blobovnicza.WithObjectSizeLimit(sz))