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[#1367] fstree: Add size to file counter

Browse source 
FSTree file counter used by writecache. As writecache has now only one
storage, so it is required to use real object size to get writecache
size more accurate than `count * max_object_size`.

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>
This commit is contained in:
Dmitrii Stepanov 2024-09-10 11:01:30 +03:00
parent 5f6c7cbdb1
commit b142b6f48e
9 changed files with 130 additions and 85 deletions
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61
pkg/local_object_storage/blobstor/fstree/counter.go
View file

@ -1,22 +1,21 @@
package fstree
import (
"math"
"sync/atomic"
"sync"
)
// FileCounter used to count files in FSTree. The implementation must be thread-safe.
type FileCounter interface {
Set(v uint64)
Inc()
Dec()
Set(count, size uint64)
Inc(size uint64)
Dec(size uint64)
}
type noopCounter struct{}
func (c *noopCounter) Set(uint64) {}
func (c *noopCounter) Inc() {}
func (c *noopCounter) Dec() {}
func (c *noopCounter) Set(uint64, uint64) {}
func (c *noopCounter) Inc(uint64) {}
func (c *noopCounter) Dec(uint64) {}
func counterEnabled(c FileCounter) bool {
_, noop := c.(*noopCounter)
@ -24,14 +23,50 @@ func counterEnabled(c FileCounter) bool {
}
type SimpleCounter struct {
v atomic.Uint64
mtx sync.RWMutex
count uint64
size uint64
}
func NewSimpleCounter() *SimpleCounter {
return &SimpleCounter{}
}
func (c *SimpleCounter) Set(v uint64) { c.v.Store(v) }
func (c *SimpleCounter) Inc() { c.v.Add(1) }
func (c *SimpleCounter) Dec() { c.v.Add(math.MaxUint64) }
func (c *SimpleCounter) Value() uint64 { return c.v.Load() }
func (c *SimpleCounter) Set(count, size uint64) {
c.mtx.Lock()
defer c.mtx.Unlock()
c.count = count
c.size = size
}
func (c *SimpleCounter) Inc(size uint64) {
c.mtx.Lock()
defer c.mtx.Unlock()
c.count++
c.size += size
}
func (c *SimpleCounter) Dec(size uint64) {
c.mtx.Lock()
defer c.mtx.Unlock()
if c.count > 0 {
c.count--
} else {
panic("fstree.SimpleCounter: invalid count")
}
if c.size >= size {
c.size -= size
} else {
panic("fstree.SimpleCounter: invalid size")
}
}
func (c *SimpleCounter) CountSize() (uint64, uint64) {
c.mtx.RLock()
defer c.mtx.RUnlock()
return c.count, c.size
}

22
pkg/local_object_storage/blobstor/fstree/fstree.go
View file

@ -435,32 +435,38 @@ func (t *FSTree) initFileCounter() error {
return nil
}
counter, err := t.countFiles()
count, size, err := t.countFiles()
if err != nil {
return err
}
t.fileCounter.Set(counter)
t.fileCounter.Set(count, size)
return nil
}
func (t *FSTree) countFiles() (uint64, error) {
var counter uint64
func (t *FSTree) countFiles() (uint64, uint64, error) {
var count, size uint64
// it is simpler to just consider every file
// that is not directory as an object
err := filepath.WalkDir(t.RootPath,
func(_ string, d fs.DirEntry, _ error) error {
if !d.IsDir() {
counter++
if d.IsDir() {
return nil
}
count++
info, err := d.Info()
if err != nil {
return err
}
size += uint64(info.Size())
return nil
},
)
if err != nil {
return 0, fmt.Errorf("could not walk through %s directory: %w", t.RootPath, err)
return 0, 0, fmt.Errorf("could not walk through %s directory: %w", t.RootPath, err)
}
return counter, nil
return count, size, nil
}
func (t *FSTree) ObjectsCount(ctx context.Context) (uint64, error) {

15
pkg/local_object_storage/blobstor/fstree/fstree_test.go
View file

@ -47,8 +47,9 @@ func TestObjectCounter(t *testing.T) {
require.NoError(t, fst.Open(mode.ComponentReadWrite))
require.NoError(t, fst.Init())
counterValue := counter.Value()
require.Equal(t, uint64(0), counterValue)
count, size := counter.CountSize()
require.Equal(t, uint64(0), count)
require.Equal(t, uint64(0), size)
defer func() {
require.NoError(t, fst.Close())
@ -64,9 +65,6 @@ func TestObjectCounter(t *testing.T) {
putPrm.Address = addr
putPrm.RawData, _ = obj.Marshal()
var getPrm common.GetPrm
getPrm.Address = putPrm.Address
var delPrm common.DeletePrm
delPrm.Address = addr
@ -95,8 +93,9 @@ func TestObjectCounter(t *testing.T) {
require.NoError(t, eg.Wait())
counterValue = counter.Value()
realCount, err := fst.countFiles()
count, size = counter.CountSize()
realCount, realSize, err := fst.countFiles()
require.NoError(t, err)
require.Equal(t, realCount, counterValue)
require.Equal(t, realCount, count, "real %d, actual %d", realCount, count)
require.Equal(t, realSize, size, "real %d, actual %d", realSize, size)
}

27
pkg/local_object_storage/blobstor/fstree/fstree_write_generic.go
View file

@ -78,14 +78,14 @@ func (w *genericWriter) writeAndRename(tmpPath, p string, data []byte) error {
}
if w.fileCounterEnabled {
w.fileCounter.Inc()
w.fileCounter.Inc(uint64(len(data)))
var targetFileExists bool
if _, e := os.Stat(p); e == nil {
targetFileExists = true
}
err = os.Rename(tmpPath, p)
if err == nil && targetFileExists {
w.fileCounter.Dec()
w.fileCounter.Dec(uint64(len(data)))
}
} else {
err = os.Rename(tmpPath, p)
@ -110,12 +110,7 @@ func (w *genericWriter) writeFile(p string, data []byte) error {
func (w *genericWriter) removeFile(p string) error {
var err error
if w.fileCounterEnabled {
w.fileGuard.Lock(p)
err = os.Remove(p)
w.fileGuard.Unlock(p)
if err == nil {
w.fileCounter.Dec()
}
err = w.removeWithCounter(p)
} else {
err = os.Remove(p)
}
@ -125,3 +120,19 @@ func (w *genericWriter) removeFile(p string) error {
}
return err
}
func (w *genericWriter) removeWithCounter(p string) error {
w.fileGuard.Lock(p)
defer w.fileGuard.Unlock(p)
stat, err := os.Stat(p)
if err != nil {
return err
}
if err := os.Remove(p); err != nil {
return err
}
w.fileCounter.Dec(uint64(stat.Size()))
return nil
}

42
pkg/local_object_storage/blobstor/fstree/fstree_write_linux.go
View file

@ -9,6 +9,7 @@ import (
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
utilSync "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/sync"
apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
"golang.org/x/sys/unix"
)
@ -18,7 +19,9 @@ type linuxWriter struct {
perm uint32
flags int
counter FileCounter
fileGuard keyLock
fileCounter FileCounter
fileCounterEnabled bool
}
func newSpecificWriteData(c FileCounter, root string, perm fs.FileMode, noSync bool) writer {
@ -33,11 +36,18 @@ func newSpecificWriteData(c FileCounter, root string, perm fs.FileMode, noSync b
return nil
}
_ = unix.Close(fd) // Don't care about error.
var fileGuard keyLock = &noopKeyLock{}
fileCounterEnabled := counterEnabled(c)
if fileCounterEnabled {
fileGuard = utilSync.NewKeyLocker[string]()
}
w := &linuxWriter{
root: root,
perm: uint32(perm),
flags: flags,
counter: c,
root: root,
perm: uint32(perm),
flags: flags,
fileGuard: fileGuard,
fileCounter: c,
fileCounterEnabled: fileCounterEnabled,
}
return w
}
@ -51,6 +61,10 @@ func (w *linuxWriter) writeData(p string, data []byte) error {
}
func (w *linuxWriter) writeFile(p string, data []byte) error {
if w.fileCounterEnabled {
w.fileGuard.Lock(p)
defer w.fileGuard.Unlock(p)
}
fd, err := unix.Open(w.root, w.flags, w.perm)
if err != nil {
return err
@ -61,7 +75,7 @@ func (w *linuxWriter) writeFile(p string, data []byte) error {
if n == len(data) {
err = unix.Linkat(unix.AT_FDCWD, tmpPath, unix.AT_FDCWD, p, unix.AT_SYMLINK_FOLLOW)
if err == nil {
w.counter.Inc()
w.fileCounter.Inc(uint64(len(data)))
}
if errors.Is(err, unix.EEXIST) {
err = nil
@ -78,12 +92,24 @@ func (w *linuxWriter) writeFile(p string, data []byte) error {
}
func (w *linuxWriter) removeFile(p string) error {
err := unix.Unlink(p)
if w.fileCounterEnabled {
w.fileGuard.Lock(p)
defer w.fileGuard.Unlock(p)
}
var stat unix.Stat_t
err := unix.Stat(p, &stat)
if err != nil {
if err == unix.ENOENT {
return logicerr.Wrap(new(apistatus.ObjectNotFound))
}
return err
}
err = unix.Unlink(p)
if err != nil && err == unix.ENOENT {
return logicerr.Wrap(new(apistatus.ObjectNotFound))
}
if err == nil {
w.counter.Dec()
w.fileCounter.Dec(uint64(stat.Size))
}
return err
}

3
pkg/local_object_storage/writecache/cache.go
View file

@ -29,6 +29,8 @@ type cache struct {
wg sync.WaitGroup
// fsTree contains big files stored directly on file-system.
fsTree *fstree.FSTree
// counter contains atomic counters for the number of objects stored in cache.
counter *fstree.SimpleCounter
}
// wcStorageType is used for write-cache operations logging.
@ -56,6 +58,7 @@ func New(opts ...Option) Cache {
c := &cache{
flushCh: make(chan objectInfo),
mode: mode.Disabled,
counter: fstree.NewSimpleCounter(),
options: options{
log: &logger.Logger{Logger: zap.NewNop()},

2
pkg/local_object_storage/writecache/options.go
View file

@ -30,8 +30,6 @@ type options struct {
// maxCacheCount is the maximum total count of all object saved in cache.
// 0 (no limit) by default.
maxCacheCount uint64
// objCounters contains atomic counters for the number of objects stored in cache.
objCounters counters
// maxBatchSize is the maximum batch size for the small object database.
maxBatchSize int
// maxBatchDelay is the maximum batch wait time for the small object database.

41
pkg/local_object_storage/writecache/state.go
View file

@ -1,18 +1,10 @@
package writecache
import (
"math"
"sync/atomic"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/fstree"
)
func (c *cache) estimateCacheSize() (uint64, uint64) {
fsCount := c.objCounters.FS()
fsSize := fsCount * c.maxObjectSize
c.metrics.SetEstimateSize(0, fsSize)
c.metrics.SetActualCounters(0, fsCount)
return fsCount, fsSize
count, size := c.counter.CountSize()
c.metrics.SetEstimateSize(0, size)
c.metrics.SetActualCounters(0, count)
return count, size
}
func (c *cache) hasEnoughSpaceFS() bool {
@ -27,31 +19,6 @@ func (c *cache) hasEnoughSpace(objectSize uint64) bool {
return c.maxCacheSize >= size+objectSize
}
var _ fstree.FileCounter = &counters{}
type counters struct {
cFS atomic.Uint64
}
func (x *counters) FS() uint64 {
return x.cFS.Load()
}
// Set implements fstree.ObjectCounter.
func (x *counters) Set(v uint64) {
x.cFS.Store(v)
}
// Inc implements fstree.ObjectCounter.
func (x *counters) Inc() {
x.cFS.Add(1)
}
// Dec implements fstree.ObjectCounter.
func (x *counters) Dec() {
x.cFS.Add(math.MaxUint64)
}
func (c *cache) initCounters() error {
c.estimateCacheSize()
return nil

2
pkg/local_object_storage/writecache/storage.go
View file

@ -30,7 +30,7 @@ func (c *cache) openStore(mod mode.ComponentMode) error {
fstree.WithDepth(1),
fstree.WithDirNameLen(1),
fstree.WithNoSync(c.noSync),
fstree.WithFileCounter(&c.objCounters),
fstree.WithFileCounter(c.counter),
)
if err := c.fsTree.Open(mod); err != nil {
return fmt.Errorf("could not open FSTree: %w", err)