TrueCloudLab/frostfs-node
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[#9999] writecache: Make writecache as FSTree only

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Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>
This commit is contained in:
Dmitrii Stepanov 2024-07-23 11:06:45 +03:00
parent 7fd7961dfa
commit bc6653afb5
27 changed files with 80 additions and 695 deletions
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25
cmd/frostfs-lens/internal/writecache/inspect.go
View file

@ -1,11 +1,10 @@
package writecache
import (
"os"
common "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-lens/internal"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/writecache"
objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"github.com/spf13/cobra"
)
@ -23,18 +22,20 @@ func init() {
}
func inspectFunc(cmd *cobra.Command, _ []string) {
var data []byte
wc := writecache.New(
writecache.WithPath(vPath),
)
common.ExitOnErr(cmd, common.Errf("could not open write-cache: %w", wc.Open(cmd.Context(), mode.ReadOnly)))
defer wc.Close()
db, err := writecache.OpenDB(vPath, true, os.OpenFile)
common.ExitOnErr(cmd, common.Errf("could not open write-cache db: %w", err))
defer db.Close()
var addr oid.Address
common.ExitOnErr(cmd, common.Errf("could not decode address: %w", addr.DecodeString(vAddress)))
data, err = writecache.Get(db, []byte(vAddress))
obj, err := wc.Get(cmd.Context(), addr)
common.ExitOnErr(cmd, common.Errf("could not fetch object: %w", err))
var o objectSDK.Object
common.ExitOnErr(cmd, common.Errf("could not unmarshal object: %w", o.Unmarshal(data)))
common.PrintObjectHeader(cmd, o)
common.PrintObjectHeader(cmd, *obj)
data, err := obj.Marshal()
common.ExitOnErr(cmd, common.Errf("could not marshal object: %w", err))
common.WriteObjectToFile(cmd, vOut, data)
}

25
cmd/frostfs-lens/internal/writecache/list.go
View file

@ -3,11 +3,11 @@ package writecache
import (
"fmt"
"io"
"os"
common "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-lens/internal"
blobstor "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/writecache"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"github.com/spf13/cobra"
)
@ -26,15 +26,18 @@ func listFunc(cmd *cobra.Command, _ []string) {
// other targets can be supported
w := cmd.OutOrStderr()
wAddr := func(addr oid.Address) error {
_, err := io.WriteString(w, fmt.Sprintf("%s\n", addr))
wc := writecache.New(
writecache.WithPath(vPath),
)
common.ExitOnErr(cmd, common.Errf("could not open write-cache: %w", wc.Open(cmd.Context(), mode.ReadOnly)))
defer wc.Close()
var prm blobstor.IteratePrm
prm.IgnoreErrors = true
prm.Handler = func(ie blobstor.IterationElement) error {
_, err := io.WriteString(w, fmt.Sprintf("%s\n", ie.Address))
return err
}
db, err := writecache.OpenDB(vPath, true, os.OpenFile)
common.ExitOnErr(cmd, common.Errf("could not open write-cache db: %w", err))
defer db.Close()
err = writecache.IterateDB(db, wAddr)
common.ExitOnErr(cmd, common.Errf("write-cache iterator failure: %w", err))
_, err := wc.Iterate(cmd.Context(), prm)
common.ExitOnErr(cmd, common.Errf("could not iterate write-cache: %w", err))
}

9
cmd/frostfs-node/config.go
View file

@ -146,9 +146,6 @@ type shardCfg struct {
writecacheCfg struct {
enabled bool
path string
maxBatchSize int
maxBatchDelay time.Duration
smallObjectSize uint64
maxObjSize uint64
flushWorkerCount int
sizeLimit uint64
@ -269,10 +266,7 @@ func (a *applicationConfiguration) setShardWriteCacheConfig(newConfig *shardCfg,
wc.enabled = true
wc.path = writeCacheCfg.Path()
wc.maxBatchSize = writeCacheCfg.BoltDB().MaxBatchSize()
wc.maxBatchDelay = writeCacheCfg.BoltDB().MaxBatchDelay()
wc.maxObjSize = writeCacheCfg.MaxObjectSize()
wc.smallObjectSize = writeCacheCfg.SmallObjectSize()
wc.flushWorkerCount = writeCacheCfg.WorkerCount()
wc.sizeLimit = writeCacheCfg.SizeLimit()
wc.noSync = writeCacheCfg.NoSync()
@ -861,10 +855,7 @@ func (c *cfg) getWriteCacheOpts(shCfg shardCfg) []writecache.Option {
if wcRead := shCfg.writecacheCfg; wcRead.enabled {
writeCacheOpts = append(writeCacheOpts,
writecache.WithPath(wcRead.path),
writecache.WithMaxBatchSize(wcRead.maxBatchSize),
writecache.WithMaxBatchDelay(wcRead.maxBatchDelay),
writecache.WithMaxObjectSize(wcRead.maxObjSize),
writecache.WithSmallObjectSize(wcRead.smallObjectSize),
writecache.WithFlushWorkersCount(wcRead.flushWorkerCount),
writecache.WithMaxCacheSize(wcRead.sizeLimit),
writecache.WithNoSync(wcRead.noSync),

2
cmd/frostfs-node/config/engine/config_test.go
View file

@ -74,7 +74,6 @@ func TestEngineSection(t *testing.T) {
require.Equal(t, true, wc.NoSync())
require.Equal(t, "tmp/0/cache", wc.Path())
require.EqualValues(t, 16384, wc.SmallObjectSize())
require.EqualValues(t, 134217728, wc.MaxObjectSize())
require.EqualValues(t, 30, wc.WorkerCount())
require.EqualValues(t, 3221225472, wc.SizeLimit())
@ -129,7 +128,6 @@ func TestEngineSection(t *testing.T) {
require.Equal(t, false, wc.NoSync())
require.Equal(t, "tmp/1/cache", wc.Path())
require.EqualValues(t, 16384, wc.SmallObjectSize())
require.EqualValues(t, 134217728, wc.MaxObjectSize())
require.EqualValues(t, 30, wc.WorkerCount())
require.EqualValues(t, 4294967296, wc.SizeLimit())

19
cmd/frostfs-node/config/engine/shard/writecache/config.go
View file

@ -10,9 +10,6 @@ import (
type Config config.Config
const (
// SmallSizeDefault is a default size of small objects.
SmallSizeDefault = 32 << 10
// MaxSizeDefault is a default value of the object payload size limit.
MaxSizeDefault = 64 << 20
@ -51,22 +48,6 @@ func (x *Config) Path() string {
return p
}
// SmallObjectSize returns the value of "small_object_size" config parameter.
//
// Returns SmallSizeDefault if the value is not a positive number.
func (x *Config) SmallObjectSize() uint64 {
s := config.SizeInBytesSafe(
(*config.Config)(x),
"small_object_size",
)
if s > 0 {
return s
}
return SmallSizeDefault
}
// MaxObjectSize returns the value of "max_object_size" config parameter.
//
// Returns MaxSizeDefault if the value is not a positive number.

2
config/example/node.env
View file

@ -101,7 +101,6 @@ FROSTFS_STORAGE_SHARD_0_MODE=read-only
FROSTFS_STORAGE_SHARD_0_WRITECACHE_ENABLED=false
FROSTFS_STORAGE_SHARD_0_WRITECACHE_NO_SYNC=true
FROSTFS_STORAGE_SHARD_0_WRITECACHE_PATH=tmp/0/cache
FROSTFS_STORAGE_SHARD_0_WRITECACHE_SMALL_OBJECT_SIZE=16384
FROSTFS_STORAGE_SHARD_0_WRITECACHE_MAX_OBJECT_SIZE=134217728
FROSTFS_STORAGE_SHARD_0_WRITECACHE_FLUSH_WORKER_COUNT=30
FROSTFS_STORAGE_SHARD_0_WRITECACHE_CAPACITY=3221225472
@ -155,7 +154,6 @@ FROSTFS_STORAGE_SHARD_1_MODE=read-write
### Write cache config
FROSTFS_STORAGE_SHARD_1_WRITECACHE_ENABLED=true
FROSTFS_STORAGE_SHARD_1_WRITECACHE_PATH=tmp/1/cache
FROSTFS_STORAGE_SHARD_1_WRITECACHE_SMALL_OBJECT_SIZE=16384
FROSTFS_STORAGE_SHARD_1_WRITECACHE_MAX_OBJECT_SIZE=134217728
FROSTFS_STORAGE_SHARD_1_WRITECACHE_FLUSH_WORKER_COUNT=30
FROSTFS_STORAGE_SHARD_1_WRITECACHE_CAPACITY=4294967296

2
config/example/node.json
View file

@ -145,7 +145,6 @@
"enabled": false,
"no_sync": true,
"path": "tmp/0/cache",
"small_object_size": 16384,
"max_object_size": 134217728,
"flush_worker_count": 30,
"capacity": 3221225472
@ -203,7 +202,6 @@
"enabled": true,
"path": "tmp/1/cache",
"memcache_capacity": 2147483648,
"small_object_size": 16384,
"max_object_size": 134217728,
"flush_worker_count": 30,
"capacity": 4294967296

1
config/example/node.yaml
View file

@ -125,7 +125,6 @@ storage:
writecache:
enabled: true
small_object_size: 16k # size threshold for "small" objects which are cached in key-value DB, not in FS, bytes
max_object_size: 134217728 # size threshold for "big" objects which bypass write-cache and go to the storage directly, bytes
flush_worker_count: 30 # number of write-cache flusher threads

4
docs/storage-node-configuration.md
View file

@ -287,7 +287,6 @@ writecache:
enabled: true
path: /path/to/writecache
capacity: 4294967296
small_object_size: 16384
max_object_size: 134217728
flush_worker_count: 30
```
@ -296,11 +295,8 @@ writecache:
|----------------------|------------|---------------|----------------------------------------------------------------------------------------------------------------------|
| `path` | `string` | | Path to the metabase file. |
| `capacity` | `size` | unrestricted | Approximate maximum size of the writecache. If the writecache is full, objects are written to the blobstor directly. |
| `small_object_size` | `size` | `32K` | Maximum object size for "small" objects. This objects are stored in a key-value database instead of a file-system. |
| `max_object_size` | `size` | `64M` | Maximum object size allowed to be stored in the writecache. |
| `flush_worker_count` | `int` | `20` | Amount of background workers that move data from the writecache to the blobstor. |
| `max_batch_size` | `int` | `1000` | Maximum amount of small object `PUT` operations to perform in a single transaction. |
| `max_batch_delay` | `duration` | `10ms` | Maximum delay before a batch starts. |
# `node` section

1
internal/logs/logs.go
View file

@ -278,7 +278,6 @@ const (
ShardCouldNotMarkObjectToDeleteInMetabase = "could not mark object to delete in metabase"
WritecacheTriedToFlushItemsFromWritecache = "tried to flush items from write-cache"
WritecacheWaitingForChannelsToFlush = "waiting for channels to flush"
WritecacheCantRemoveObjectsFromTheDatabase = "can't remove objects from the database"
WritecacheCantRemoveObjectFromWritecache = "can't remove object from write-cache"
BlobovniczatreeCouldNotGetObjectFromLevel = "could not get object from level"
BlobovniczatreeCouldNotCloseBlobovnicza = "could not close Blobovnicza"

6
pkg/local_object_storage/engine/writecache.go
View file

@ -166,8 +166,7 @@ func (m *writeCacheMetrics) Put(d time.Duration, success bool, st writecache.Sto
m.metrics.AddMethodDuration(m.shardID, m.path, st.String(), "Put", success, d)
}
func (m *writeCacheMetrics) SetEstimateSize(db, fstree uint64) {
m.metrics.SetEstimateSize(m.shardID, m.path, writecache.StorageTypeDB.String(), db)
func (m *writeCacheMetrics) SetEstimateSize(fstree uint64) {
m.metrics.SetEstimateSize(m.shardID, m.path, writecache.StorageTypeFSTree.String(), fstree)
}
@ -175,8 +174,7 @@ func (m *writeCacheMetrics) SetMode(mod mode.ComponentMode) {
m.metrics.SetMode(m.shardID, mod.String())
}
func (m *writeCacheMetrics) SetActualCounters(db, fstree uint64) {
m.metrics.SetActualCount(m.shardID, m.path, writecache.StorageTypeDB.String(), db)
func (m *writeCacheMetrics) SetActualCounters(fstree uint64) {
m.metrics.SetActualCount(m.shardID, m.path, writecache.StorageTypeFSTree.String(), fstree)
}

1
pkg/local_object_storage/writecache/benchmark/writecache_test.go
View file

@ -95,6 +95,5 @@ func newCache(b *testing.B) writecache.Cache {
writecache.WithBlobstor(bs),
writecache.WithMetabase(testMetabase{}),
writecache.WithMaxCacheSize(256<<30),
writecache.WithSmallObjectSize(128<<10),
)
}

51
pkg/local_object_storage/writecache/cachebbolt.go → pkg/local_object_storage/writecache/cache.go
View file

@ -10,8 +10,6 @@ import (
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/metaerr"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
"go.etcd.io/bbolt"
"go.uber.org/zap"
)
@ -28,14 +26,10 @@ type cache struct {
// whether object should be compressed.
compressFlags map[string]struct{}
// flushCh is a channel with objects to flush.
flushCh chan objectInfo
// cancel is cancel function, protected by modeMtx in Close.
cancel atomic.Value
// wg is a wait group for flush workers.
wg sync.WaitGroup
// store contains underlying database.
store
// fsTree contains big files stored directly on file-system.
fsTree *fstree.FSTree
}
@ -43,40 +37,26 @@ type cache struct {
// wcStorageType is used for write-cache operations logging.
const wcStorageType = "write-cache"
type objectInfo struct {
addr string
data []byte
obj *objectSDK.Object
}
const (
defaultMaxObjectSize = 64 * 1024 * 1024 // 64 MiB
defaultSmallObjectSize = 32 * 1024 // 32 KiB
defaultMaxCacheSize = 1 << 30 // 1 GiB
defaultMaxObjectSize = 64 * 1024 * 1024 // 64 MiB
defaultMaxCacheSize = 1 << 30 // 1 GiB
)
var (
defaultBucket = []byte{0}
dummyCanceler context.CancelFunc = func() {}
)
var dummyCanceler context.CancelFunc = func() {}
// New creates new writecache instance.
func New(opts ...Option) Cache {
c := &cache{
flushCh: make(chan objectInfo),
mode: mode.Disabled,
mode: mode.Disabled,
compressFlags: make(map[string]struct{}),
options: options{
log: &logger.Logger{Logger: zap.NewNop()},
maxObjectSize: defaultMaxObjectSize,
smallObjectSize: defaultSmallObjectSize,
workersCount: defaultFlushWorkersCount,
maxCacheSize: defaultMaxCacheSize,
maxBatchSize: bbolt.DefaultMaxBatchSize,
maxBatchDelay: bbolt.DefaultMaxBatchDelay,
openFile: os.OpenFile,
metrics: DefaultMetrics(),
log: &logger.Logger{Logger: zap.NewNop()},
maxObjectSize: defaultMaxObjectSize,
workersCount: defaultFlushWorkersCount,
maxCacheSize: defaultMaxCacheSize,
openFile: os.OpenFile,
metrics: DefaultMetrics(),
},
}
@ -111,7 +91,8 @@ func (c *cache) Open(_ context.Context, mod mode.Mode) error {
return metaerr.Wrap(err)
}
return metaerr.Wrap(c.initCounters())
_ = c.estimateCacheSize()
return nil
}
// Init runs necessary services.
@ -138,14 +119,6 @@ func (c *cache) Close() error {
c.modeMtx.Lock()
defer c.modeMtx.Unlock()
var err error
if c.db != nil {
err = c.db.Close()
if err != nil {
c.db = nil
}
}
c.metrics.Close()
return nil
}

35
pkg/local_object_storage/writecache/delete.go
View file

@ -2,7 +2,6 @@ package writecache
import (
"context"
"math"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
@ -10,7 +9,6 @@ import (
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/metaerr"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"go.etcd.io/bbolt"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
)
@ -47,39 +45,6 @@ func (c *cache) Delete(ctx context.Context, addr oid.Address) error {
saddr := addr.EncodeToString()
var dataSize int
_ = c.db.View(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
dataSize = len(b.Get([]byte(saddr)))
return nil
})
if dataSize > 0 {
storageType = StorageTypeDB
var recordDeleted bool
err := c.db.Update(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
key := []byte(saddr)
recordDeleted = b.Get(key) != nil
err := b.Delete(key)
return err
})
if err != nil {
return err
}
storagelog.Write(c.log,
storagelog.AddressField(saddr),
storagelog.StorageTypeField(wcStorageType),
storagelog.OpField("db DELETE"),
)
if recordDeleted {
c.objCounters.cDB.Add(math.MaxUint64)
c.estimateCacheSize()
}
deleted = true
return nil
}
storageType = StorageTypeFSTree
_, err := c.fsTree.Delete(ctx, common.DeletePrm{Address: addr})
if err == nil {

208
pkg/local_object_storage/writecache/flush.go
View file

@ -1,7 +1,6 @@
package writecache
import (
"bytes"
"context"
"errors"
"time"
@ -15,142 +14,33 @@ import (
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"github.com/mr-tron/base58"
"go.etcd.io/bbolt"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
"go.uber.org/zap"
)
const (
// flushBatchSize is amount of keys which will be read from cache to be flushed
// to the main storage. It is used to reduce contention between cache put
// and cache persist.
flushBatchSize = 512
// defaultFlushWorkersCount is number of workers for putting objects in main storage.
defaultFlushWorkersCount = 20
// defaultFlushInterval is default time interval between successive flushes.
defaultFlushInterval = time.Second
defaultFlushInterval = 10 * time.Second
)
var errIterationCompleted = errors.New("iteration completed")
// runFlushLoop starts background workers which periodically flush objects to the blobstor.
func (c *cache) runFlushLoop(ctx context.Context) {
if c.disableBackgroundFlush {
return
}
for i := 0; i < c.workersCount; i++ {
c.wg.Add(1)
go c.workerFlushSmall(ctx)
}
c.wg.Add(1)
go func() {
c.workerFlushBig(ctx)
c.wg.Done()
}()
c.wg.Add(1)
go func() {
defer c.wg.Done()
tt := time.NewTimer(defaultFlushInterval)
defer tt.Stop()
for {
select {
case <-tt.C:
c.flushSmallObjects(ctx)
tt.Reset(defaultFlushInterval)
c.estimateCacheSize()
case <-ctx.Done():
return
}
}
}()
}
func (c *cache) flushSmallObjects(ctx context.Context) {
var lastKey []byte
for {
select {
case <-ctx.Done():
return
default:
}
var m []objectInfo
c.modeMtx.RLock()
if c.readOnly() {
c.modeMtx.RUnlock()
time.Sleep(time.Second)
continue
}
// We put objects in batches of fixed size to not interfere with main put cycle a lot.
_ = c.db.View(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
cs := b.Cursor()
var k, v []byte
if len(lastKey) == 0 {
k, v = cs.First()
} else {
k, v = cs.Seek(lastKey)
if bytes.Equal(k, lastKey) {
k, v = cs.Next()
}
}
for ; k != nil && len(m) < flushBatchSize; k, v = cs.Next() {
if len(lastKey) == len(k) {
copy(lastKey, k)
} else {
lastKey = bytes.Clone(k)
}
m = append(m, objectInfo{
addr: string(k),
data: bytes.Clone(v),
})
}
return nil
})
var count int
for i := range m {
obj := objectSDK.New()
if err := obj.Unmarshal(m[i].data); err != nil {
continue
}
m[i].obj = obj
count++
select {
case c.flushCh <- m[i]:
case <-ctx.Done():
c.modeMtx.RUnlock()
return
}
}
c.modeMtx.RUnlock()
if count == 0 {
break
}
c.log.Debug(logs.WritecacheTriedToFlushItemsFromWritecache,
zap.Int("count", count),
zap.String("start", base58.Encode(lastKey)))
}
}
func (c *cache) workerFlushBig(ctx context.Context) {
tick := time.NewTicker(defaultFlushInterval * 10)
tick := time.NewTicker(defaultFlushInterval)
for {
select {
case <-tick.C:
@ -211,29 +101,6 @@ func (c *cache) flushFSTree(ctx context.Context, ignoreErrors bool) error {
return err
}
// workerFlushSmall writes small objects to the main storage.
func (c *cache) workerFlushSmall(ctx context.Context) {
defer c.wg.Done()
var objInfo objectInfo
for {
// Give priority to direct put.
select {
case objInfo = <-c.flushCh:
case <-ctx.Done():
return
}
err := c.flushObject(ctx, objInfo.obj, objInfo.data, StorageTypeDB)
if err != nil {
// Error is handled in flushObject.
continue
}
c.deleteFromDB(objInfo.addr, true)
}
}
// flushObject is used to write object directly to the main storage.
func (c *cache) flushObject(ctx context.Context, obj *objectSDK.Object, data []byte, st StorageType) error {
var err error
@ -300,74 +167,5 @@ func (c *cache) Flush(ctx context.Context, ignoreErrors, seal bool) error {
}
func (c *cache) flush(ctx context.Context, ignoreErrors bool) error {
if err := c.flushFSTree(ctx, ignoreErrors); err != nil {
return err
}
var last string
for {
batch, err := c.readNextDBBatch(ignoreErrors, last)
if err != nil {
return err
}
if len(batch) == 0 {
break
}
for _, item := range batch {
var obj objectSDK.Object
if err := obj.Unmarshal(item.data); err != nil {
c.reportFlushError(logs.FSTreeCantDecodeDBObjectAddress, item.address, metaerr.Wrap(err))
if ignoreErrors {
continue
}
return err
}
if err := c.flushObject(ctx, &obj, item.data, StorageTypeDB); err != nil {
return err
}
c.deleteFromDB(item.address, false)
}
last = batch[len(batch)-1].address
}
return nil
}
type batchItem struct {
data []byte
address string
}
func (c *cache) readNextDBBatch(ignoreErrors bool, last string) ([]batchItem, error) {
const batchSize = 100
var batch []batchItem
err := c.db.View(func(tx *bbolt.Tx) error {
var addr oid.Address
b := tx.Bucket(defaultBucket)
cs := b.Cursor()
for k, data := cs.Seek([]byte(last)); k != nil; k, data = cs.Next() {
sa := string(k)
if sa == last {
continue
}
if err := addr.DecodeString(sa); err != nil {
c.reportFlushError(logs.FSTreeCantDecodeDBObjectAddress, sa, metaerr.Wrap(err))
if ignoreErrors {
continue
}
return err
}
batch = append(batch, batchItem{data: bytes.Clone(data), address: sa})
if len(batch) == batchSize {
return errIterationCompleted
}
}
return nil
})
if err == nil || errors.Is(err, errIterationCompleted) {
return batch, nil
}
return nil, err
return c.flushFSTree(ctx, ignoreErrors)
}

27
pkg/local_object_storage/writecache/flush_test.go
View file

@ -19,7 +19,6 @@ import (
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
"github.com/stretchr/testify/require"
"go.etcd.io/bbolt"
"go.uber.org/zap"
)
@ -31,7 +30,6 @@ func TestFlush(t *testing.T) {
append([]Option{
WithLogger(testlogger),
WithPath(filepath.Join(t.TempDir(), "writecache")),
WithSmallObjectSize(smallSize),
WithMetabase(mb),
WithBlobstor(bs),
WithDisableBackgroundFlush(),
@ -47,31 +45,6 @@ func TestFlush(t *testing.T) {
}
failures := []TestFailureInjector[Option]{
{
Desc: "db, invalid address",
InjectFn: func(t *testing.T, wc Cache) {
c := wc.(*cache)
obj := testutil.GenerateObject()
data, err := obj.Marshal()
require.NoError(t, err)
require.NoError(t, c.db.Batch(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
return b.Put([]byte{1, 2, 3}, data)
}))
},
},
{
Desc: "db, invalid object",
InjectFn: func(t *testing.T, wc Cache) {
c := wc.(*cache)
require.NoError(t, c.db.Batch(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
k := []byte(oidtest.Address().EncodeToString())
v := []byte{1, 2, 3}
return b.Put(k, v)
}))
},
},
{
Desc: "fs, read error",
InjectFn: func(t *testing.T, wc Cache) {

40
pkg/local_object_storage/writecache/get.go
View file

@ -1,7 +1,6 @@
package writecache
import (
"bytes"
"context"
"time"
@ -12,7 +11,6 @@ import (
apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"go.etcd.io/bbolt"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
)
@ -37,11 +35,11 @@ func (c *cache) Get(ctx context.Context, addr oid.Address) (*objectSDK.Object, e
return nil, ErrDegraded
}
obj, err := c.getInternal(ctx, saddr, addr)
obj, err := c.getInternal(ctx, addr)
return obj, metaerr.Wrap(err)
}
func (c *cache) getInternal(ctx context.Context, saddr string, addr oid.Address) (*objectSDK.Object, error) {
func (c *cache) getInternal(ctx context.Context, addr oid.Address) (*objectSDK.Object, error) {
found := false
storageType := StorageTypeUndefined
startedAt := time.Now()
@ -49,14 +47,6 @@ func (c *cache) getInternal(ctx context.Context, saddr string, addr oid.Address)
c.metrics.Get(time.Since(startedAt), found, storageType)
}()
value, err := Get(c.db, []byte(saddr))
if err == nil {
obj := objectSDK.New()
found = true
storageType = StorageTypeDB
return obj, obj.Unmarshal(value)
}
res, err := c.fsTree.Get(ctx, common.GetPrm{Address: addr})
if err != nil {
return nil, logicerr.Wrap(new(apistatus.ObjectNotFound))
@ -87,34 +77,10 @@ func (c *cache) Head(ctx context.Context, addr oid.Address) (*objectSDK.Object,
return nil, ErrDegraded
}
obj, err := c.getInternal(ctx, saddr, addr)
obj, err := c.getInternal(ctx, addr)
if err != nil {
return nil, metaerr.Wrap(err)
}
return obj.CutPayload(), nil
}
// Get fetches object from the underlying database.
// Key should be a stringified address.
//
// Returns an error of type apistatus.ObjectNotFound if the requested object is missing in db.
func Get(db *bbolt.DB, key []byte) ([]byte, error) {
if db == nil {
return nil, ErrNotInitialized
}
var value []byte
err := db.View(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
if b == nil {
return ErrNoDefaultBucket
}
value = b.Get(key)
if value == nil {
return logicerr.Wrap(new(apistatus.ObjectNotFound))
}
value = bytes.Clone(value)
return nil
})
return value, metaerr.Wrap(err)
}

49
pkg/local_object_storage/writecache/iterate.go
View file

@ -1,39 +1,28 @@
package writecache
import (
"errors"
"fmt"
"context"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/metaerr"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"go.etcd.io/bbolt"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
)
// ErrNoDefaultBucket is returned by IterateDB when default bucket for objects is missing.
var ErrNoDefaultBucket = errors.New("no default bucket")
func (c *cache) Iterate(ctx context.Context, prm common.IteratePrm) (common.IterateRes, error) {
ctx, span := tracing.StartSpanFromContext(ctx, "writecache.Iterate",
trace.WithAttributes(
attribute.Bool("ignore_errors", prm.IgnoreErrors),
))
defer span.End()
// IterateDB iterates over all objects stored in bbolt.DB instance and passes them to f until error return.
// It is assumed that db is an underlying database of some WriteCache instance.
//
// Returns ErrNoDefaultBucket if there is no default bucket in db.
//
// DB must not be nil and should be opened.
func IterateDB(db *bbolt.DB, f func(oid.Address) error) error {
return metaerr.Wrap(db.View(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
if b == nil {
return ErrNoDefaultBucket
}
if !c.modeMtx.TryRLock() {
return common.IterateRes{}, ErrNotInitialized
}
defer c.modeMtx.RUnlock()
if c.mode.NoMetabase() {
return common.IterateRes{}, ErrDegraded
}
var addr oid.Address
return b.ForEach(func(k, _ []byte) error {
err := addr.DecodeString(string(k))
if err != nil {
return fmt.Errorf("could not parse object address: %w", err)
}
return f(addr)
})
}))
return c.fsTree.Iterate(ctx, prm)
}

9
pkg/local_object_storage/writecache/metrics.go
View file

@ -14,7 +14,6 @@ func (t StorageType) String() string {
const (
StorageTypeUndefined StorageType = "null"
StorageTypeDB StorageType = "db"
StorageTypeFSTree StorageType = "fstree"
)
@ -26,9 +25,9 @@ type Metrics interface {
Flush(success bool, st StorageType)
Evict(st StorageType)
SetEstimateSize(db, fstree uint64)
SetEstimateSize(uint64)
SetMode(m mode.ComponentMode)
SetActualCounters(db, fstree uint64)
SetActualCounters(uint64)
SetPath(path string)
Close()
}
@ -47,11 +46,11 @@ func (metricsStub) Delete(time.Duration, bool, StorageType) {}
func (metricsStub) Put(time.Duration, bool, StorageType) {}
func (metricsStub) SetEstimateSize(uint64, uint64) {}
func (metricsStub) SetEstimateSize(uint64) {}
func (metricsStub) SetMode(mode.ComponentMode) {}
func (metricsStub) SetActualCounters(uint64, uint64) {}
func (metricsStub) SetActualCounters(uint64) {}
func (metricsStub) Flush(bool, StorageType) {}

19
pkg/local_object_storage/writecache/mode.go
View file

@ -2,10 +2,7 @@ package writecache
import (
"context"
"fmt"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
"go.opentelemetry.io/otel/attribute"
@ -25,7 +22,7 @@ func (c *cache) SetMode(m mode.Mode) error {
c.modeMtx.Lock()
defer c.modeMtx.Unlock()
err := c.setMode(ctx, m, true)
err := c.setMode(ctx, m, !m.NoMetabase())
if err == nil {
c.metrics.SetMode(mode.ConvertToComponentModeDegraded(m))
}
@ -44,20 +41,6 @@ func (c *cache) setMode(ctx context.Context, m mode.Mode, ignoreErrors bool) err
}
}
if c.db != nil {
if err = c.db.Close(); err != nil {
return fmt.Errorf("can't close write-cache database: %w", err)
}
}
// Suspend producers to ensure there are channel send operations in fly.
// flushCh is populated by `flush` with `modeMtx` taken, thus waiting until it is empty
// guarantees that there are no in-fly operations.
for len(c.flushCh) != 0 {
c.log.Info(logs.WritecacheWaitingForChannelsToFlush)
time.Sleep(time.Second)
}
if turnOffMeta {
c.mode = m
return nil

30
pkg/local_object_storage/writecache/mode_test.go
View file

@ -1,30 +0,0 @@
package writecache
import (
"context"
"testing"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger/test"
"github.com/stretchr/testify/require"
)
func TestMode(t *testing.T) {
t.Parallel()
wc := New(
WithLogger(test.NewLogger(t)),
WithFlushWorkersCount(2),
WithPath(t.TempDir()))
require.NoError(t, wc.Open(context.Background(), mode.DegradedReadOnly))
require.Nil(t, wc.(*cache).db)
require.NoError(t, wc.Init())
require.Nil(t, wc.(*cache).db)
require.NoError(t, wc.Close())
require.NoError(t, wc.Open(context.Background(), mode.Degraded))
require.Nil(t, wc.(*cache).db)
require.NoError(t, wc.Init())
require.Nil(t, wc.(*cache).db)
require.NoError(t, wc.Close())
}

36
pkg/local_object_storage/writecache/options.go
View file

@ -3,7 +3,6 @@ package writecache
import (
"io/fs"
"os"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
"go.uber.org/zap"
@ -22,19 +21,13 @@ type options struct {
metabase Metabase
// maxObjectSize is the maximum size of the object stored in the write-cache.
maxObjectSize uint64
// smallObjectSize is the maximum size of the object stored in the database.
smallObjectSize uint64
// workersCount is the number of workers flushing objects in parallel.
workersCount int
// maxCacheSize is the maximum total size of all objects saved in cache (DB + FS).
// maxCacheSize is the maximum total size of all objects saved in cache.
// 1 GiB by default.
maxCacheSize 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.
maxBatchDelay time.Duration
// noSync is true iff FSTree allows unsynchronized writes.
noSync bool
// reportError is the function called when encountering disk errors in background workers.
@ -84,15 +77,6 @@ func WithMaxObjectSize(sz uint64) Option {
}
}
// WithSmallObjectSize sets maximum object size to be stored in write-cache.
func WithSmallObjectSize(sz uint64) Option {
return func(o *options) {
if sz > 0 {
o.smallObjectSize = sz
}
}
}
func WithFlushWorkersCount(c int) Option {
return func(o *options) {
if c > 0 {
@ -108,24 +92,6 @@ func WithMaxCacheSize(sz uint64) Option {
}
}
// WithMaxBatchSize sets max batch size for the small object database.
func WithMaxBatchSize(sz int) Option {
return func(o *options) {
if sz > 0 {
o.maxBatchSize = sz
}
}
}
// WithMaxBatchDelay sets max batch delay for the small object database.
func WithMaxBatchDelay(d time.Duration) Option {
return func(o *options) {
if d > 0 {
o.maxBatchDelay = d
}
}
}
// WithNoSync sets an option to allow returning to caller on PUT before write is persisted.
// Note, that we use this flag for FSTree only and DO NOT use it for a bolt DB because
// we cannot yet properly handle the corrupted database during the startup. This SHOULD NOT

53
pkg/local_object_storage/writecache/put.go
View file

@ -8,7 +8,6 @@ import (
storagelog "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/log"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/metaerr"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
"go.etcd.io/bbolt"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
)
@ -50,63 +49,17 @@ func (c *cache) Put(ctx context.Context, prm common.PutPrm) (common.PutRes, erro
return common.PutRes{}, ErrBigObject
}
oi := objectInfo{
addr: prm.Address.EncodeToString(),
obj: prm.Object,
data: prm.RawData,
}
if sz <= c.smallObjectSize {
storageType = StorageTypeDB
err := c.putSmall(oi)
if err == nil {
added = true
}
return common.PutRes{}, err
}
storageType = StorageTypeFSTree
err := c.putBig(ctx, oi.addr, prm)
err := c.putBig(ctx, prm)
if err == nil {
added = true
}
return common.PutRes{}, metaerr.Wrap(err)
}
// putSmall persists small objects to the write-cache database and
// pushes the to the flush workers queue.
func (c *cache) putSmall(obj objectInfo) error {
cacheSize := c.estimateCacheSize()
if c.maxCacheSize < c.incSizeDB(cacheSize) {
return ErrOutOfSpace
}
var newRecord bool
err := c.db.Batch(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
key := []byte(obj.addr)
newRecord = b.Get(key) == nil
if newRecord {
return b.Put(key, obj.data)
}
return nil
})
if err == nil {
storagelog.Write(c.log,
storagelog.AddressField(obj.addr),
storagelog.StorageTypeField(wcStorageType),
storagelog.OpField("db PUT"),
)
if newRecord {
c.objCounters.cDB.Add(1)
c.estimateCacheSize()
}
}
return err
}
// putBig writes object to FSTree and pushes it to the flush workers queue.
func (c *cache) putBig(ctx context.Context, addr string, prm common.PutPrm) error {
func (c *cache) putBig(ctx context.Context, prm common.PutPrm) error {
addr := prm.Address.EncodeToString()
cacheSz := c.estimateCacheSize()
if c.maxCacheSize < c.incSizeFS(cacheSz) {
return ErrOutOfSpace

37
pkg/local_object_storage/writecache/state.go
View file

@ -1,29 +1,21 @@
package writecache
import (
"fmt"
"math"
"sync/atomic"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/fstree"
"go.etcd.io/bbolt"
)
func (c *cache) estimateCacheSize() uint64 {
dbCount := c.objCounters.DB()
fsCount := c.objCounters.FS()
if fsCount > 0 {
fsCount-- // db file
}
dbSize := dbCount * c.smallObjectSize
fsSize := fsCount * c.maxObjectSize
c.metrics.SetEstimateSize(dbSize, fsSize)
c.metrics.SetActualCounters(dbCount, fsCount)
return dbSize + fsSize
}
func (c *cache) incSizeDB(sz uint64) uint64 {
return sz + c.smallObjectSize
c.metrics.SetEstimateSize(fsSize)
c.metrics.SetActualCounters(fsCount)
return fsSize
}
func (c *cache) incSizeFS(sz uint64) uint64 {
@ -33,11 +25,7 @@ func (c *cache) incSizeFS(sz uint64) uint64 {
var _ fstree.FileCounter = &counters{}
type counters struct {
cDB, cFS atomic.Uint64
}
func (x *counters) DB() uint64 {
return x.cDB.Load()
cFS atomic.Uint64
}
func (x *counters) FS() uint64 {
@ -58,20 +46,3 @@ func (x *counters) Inc() {
func (x *counters) Dec() {
x.cFS.Add(math.MaxUint64)
}
func (c *cache) initCounters() error {
var inDB uint64
err := c.db.View(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
if b != nil {
inDB = uint64(b.Stats().KeyN)
}
return nil
})
if err != nil {
return fmt.Errorf("could not read write-cache DB counter: %w", err)
}
c.objCounters.cDB.Store(inDB)
c.estimateCacheSize()
return nil
}

63
pkg/local_object_storage/writecache/storage.go
View file

@ -3,7 +3,6 @@ package writecache
import (
"context"
"fmt"
"math"
"os"
"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
@ -14,42 +13,15 @@ import (
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"go.etcd.io/bbolt"
"go.uber.org/zap"
)
// store represents persistent storage with in-memory LRU cache
// for flushed items on top of it.
type store struct {
db *bbolt.DB
}
const dbName = "small.bolt"
func (c *cache) openStore(mod mode.ComponentMode) error {
err := util.MkdirAllX(c.path, os.ModePerm)
if err != nil {
return err
}
c.db, err = OpenDB(c.path, mod.ReadOnly(), c.openFile)
if err != nil {
return fmt.Errorf("could not open database: %w", err)
}
c.db.MaxBatchSize = c.maxBatchSize
c.db.MaxBatchDelay = c.maxBatchDelay
if !mod.ReadOnly() {
err = c.db.Update(func(tx *bbolt.Tx) error {
_, err := tx.CreateBucketIfNotExists(defaultBucket)
return err
})
if err != nil {
return fmt.Errorf("could not create default bucket: %w", err)
}
}
c.fsTree = fstree.New(
fstree.WithPath(c.path),
fstree.WithPerm(os.ModePerm),
@ -68,41 +40,6 @@ func (c *cache) openStore(mod mode.ComponentMode) error {
return nil
}
func (c *cache) deleteFromDB(key string, batched bool) {
var recordDeleted bool
var err error
if batched {
err = c.db.Batch(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
key := []byte(key)
recordDeleted = b.Get(key) != nil
return b.Delete(key)
})
} else {
err = c.db.Update(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
key := []byte(key)
recordDeleted = b.Get(key) != nil
return b.Delete(key)
})
}
if err == nil {
c.metrics.Evict(StorageTypeDB)
storagelog.Write(c.log,
storagelog.AddressField(key),
storagelog.StorageTypeField(wcStorageType),
storagelog.OpField("db DELETE"),
)
if recordDeleted {
c.objCounters.cDB.Add(math.MaxUint64)
c.estimateCacheSize()
}
} else {
c.log.Error(logs.WritecacheCantRemoveObjectsFromTheDatabase, zap.Error(err))
}
}
func (c *cache) deleteFromDisk(ctx context.Context, addr oid.Address) {
_, err := c.fsTree.Delete(ctx, common.DeletePrm{Address: addr})
if err != nil && !client.IsErrObjectNotFound(err) {

20
pkg/local_object_storage/writecache/util.go
View file

@ -1,20 +0,0 @@
package writecache
import (
"io/fs"
"os"
"path/filepath"
"time"
"go.etcd.io/bbolt"
)
// OpenDB opens BoltDB instance for write-cache. Opens in read-only mode if ro is true.
func OpenDB(p string, ro bool, openFile func(string, int, fs.FileMode) (*os.File, error)) (*bbolt.DB, error) {
return bbolt.Open(filepath.Join(p, dbName), os.ModePerm, &bbolt.Options{
NoFreelistSync: true,
ReadOnly: ro,
Timeout: 100 * time.Millisecond,
OpenFile: openFile,
})
}

1
pkg/local_object_storage/writecache/writecache.go
View file

@ -37,6 +37,7 @@ type Cache interface {
DumpInfo() Info
Flush(context.Context, bool, bool) error
Seal(context.Context, bool) error
Iterate(context.Context, common.IteratePrm) (common.IterateRes, error)
Init() error
Open(ctx context.Context, mode mode.Mode) error