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[#1806] writecache: Allow to ignore read errors during flush

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Signed-off-by: Evgenii Stratonikov <evgeniy@morphbits.ru>
This commit is contained in:
Evgenii Stratonikov 2022-09-26 11:54:21 +03:00 committed by fyrchik
parent f2045c10d7
commit 0a411908ee
5 changed files with 204 additions and 84 deletions
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13
pkg/local_object_storage/engine/writecache.go
View file

@ -6,7 +6,8 @@ import (
// FlushWriteCachePrm groups the parameters of FlushWriteCache operation.
type FlushWriteCachePrm struct {
shardID *shard.ID
shardID *shard.ID
ignoreErrors bool
}
// SetShardID is an option to set shard ID.
@ -16,6 +17,11 @@ func (p *FlushWriteCachePrm) SetShardID(id *shard.ID) {
p.shardID = id
}
// SetIgnoreErrors sets errors ignore flag..
func (p *FlushWriteCachePrm) SetIgnoreErrors(ignore bool) {
p.ignoreErrors = ignore
}
// FlushWriteCacheRes groups the resulting values of FlushWriteCache operation.
type FlushWriteCacheRes struct{}
@ -29,5 +35,8 @@ func (e *StorageEngine) FlushWriteCache(p FlushWriteCachePrm) (FlushWriteCacheRe
return FlushWriteCacheRes{}, errShardNotFound
}
return FlushWriteCacheRes{}, sh.FlushWriteCache()
var prm shard.FlushWriteCachePrm
prm.SetIgnoreErrors(p.ignoreErrors)
return FlushWriteCacheRes{}, sh.FlushWriteCache(prm)
}

14
pkg/local_object_storage/shard/writecache.go
View file

@ -6,13 +6,23 @@ import (
"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard/mode"
)
// FlushWriteCachePrm represents parameters of a `FlushWriteCache` operation.
type FlushWriteCachePrm struct {
ignoreErrors bool
}
// SetIgnoreErrors sets the flag to ignore read-errors during flush.
func (p *FlushWriteCachePrm) SetIgnoreErrors(ignore bool) {
p.ignoreErrors = ignore
}
// errWriteCacheDisabled is returned when an operation on write-cache is performed,
// but write-cache is disabled.
var errWriteCacheDisabled = errors.New("write-cache is disabled")
// FlushWriteCache moves writecache in read-only mode and flushes all data from it.
// After the operation writecache will remain read-only mode.
func (s *Shard) FlushWriteCache() error {
func (s *Shard) FlushWriteCache(p FlushWriteCachePrm) error {
if !s.hasWriteCache() {
return errWriteCacheDisabled
}
@ -32,5 +42,5 @@ func (s *Shard) FlushWriteCache() error {
return err
}
return s.writeCache.Flush()
return s.writeCache.Flush(p.ignoreErrors)
}

15
pkg/local_object_storage/writecache/flush.go
View file

@ -233,7 +233,7 @@ func (c *cache) flushObject(obj *object.Object) error {
// Flush flushes all objects from the write-cache to the main storage.
// Write-cache must be in readonly mode to ensure correctness of an operation and
// to prevent interference with background flush workers.
func (c *cache) Flush() error {
func (c *cache) Flush(ignoreErrors bool) error {
c.modeMtx.RLock()
defer c.modeMtx.RUnlock()
@ -242,6 +242,7 @@ func (c *cache) Flush() error {
}
var prm common.IteratePrm
prm.IgnoreErrors = ignoreErrors
prm.LazyHandler = func(addr oid.Address, f func() ([]byte, error)) error {
_, ok := c.flushed.Peek(addr.EncodeToString())
if ok {
@ -250,12 +251,18 @@ func (c *cache) Flush() error {
data, err := f()
if err != nil {
if ignoreErrors {
return nil
}
return err
}
var obj object.Object
err = obj.Unmarshal(data)
if err != nil {
if ignoreErrors {
return nil
}
return err
}
@ -279,11 +286,17 @@ func (c *cache) Flush() error {
}
if err := addr.DecodeString(sa); err != nil {
if ignoreErrors {
continue
}
return err
}
var obj object.Object
if err := obj.Unmarshal(data); err != nil {
if ignoreErrors {
continue
}
return err
}

244
pkg/local_object_storage/writecache/flush_test.go
View file

@ -1,6 +1,7 @@
package writecache
import (
"os"
"path/filepath"
"testing"
@ -18,6 +19,7 @@ import (
usertest "github.com/nspcc-dev/neofs-sdk-go/user/test"
versionSDK "github.com/nspcc-dev/neofs-sdk-go/version"
"github.com/stretchr/testify/require"
"go.etcd.io/bbolt"
"go.uber.org/zap/zaptest"
)
@ -27,105 +29,191 @@ func TestFlush(t *testing.T) {
smallSize = 256
)
dir := t.TempDir()
mb := meta.New(
meta.WithPath(filepath.Join(dir, "meta")),
meta.WithEpochState(dummyEpoch{}))
require.NoError(t, mb.Open(false))
require.NoError(t, mb.Init())
fsTree := fstree.New(fstree.WithPath(filepath.Join(dir, "blob")))
bs := blobstor.New(blobstor.WithStorages([]blobstor.SubStorage{
{Storage: fsTree},
}))
require.NoError(t, bs.Open(false))
require.NoError(t, bs.Init())
wc := New(
WithLogger(zaptest.NewLogger(t)),
WithPath(filepath.Join(dir, "writecache")),
WithSmallObjectSize(smallSize),
WithMetabase(mb),
WithBlobstor(bs))
require.NoError(t, wc.Open(false))
require.NoError(t, wc.Init())
// First set mode for metabase and blobstor to prevent background flushes.
require.NoError(t, mb.SetMode(mode.ReadOnly))
require.NoError(t, bs.SetMode(mode.ReadOnly))
type objectPair struct {
addr oid.Address
obj *object.Object
}
objects := make([]objectPair, objCount)
for i := range objects {
obj := object.New()
ver := versionSDK.Current()
newCache := func(t *testing.T) (Cache, *blobstor.BlobStor, *meta.DB) {
dir := t.TempDir()
mb := meta.New(
meta.WithPath(filepath.Join(dir, "meta")),
meta.WithEpochState(dummyEpoch{}))
require.NoError(t, mb.Open(false))
require.NoError(t, mb.Init())
obj.SetID(oidtest.ID())
obj.SetOwnerID(usertest.ID())
obj.SetContainerID(cidtest.ID())
obj.SetType(object.TypeRegular)
obj.SetVersion(&ver)
obj.SetPayloadChecksum(checksumtest.Checksum())
obj.SetPayloadHomomorphicHash(checksumtest.Checksum())
obj.SetPayload(make([]byte, 1+(i%2)*smallSize))
fsTree := fstree.New(
fstree.WithPath(filepath.Join(dir, "blob")),
fstree.WithDepth(0),
fstree.WithDirNameLen(1))
bs := blobstor.New(blobstor.WithStorages([]blobstor.SubStorage{
{Storage: fsTree},
}))
require.NoError(t, bs.Open(false))
require.NoError(t, bs.Init())
addr := objectCore.AddressOf(obj)
data, err := obj.Marshal()
require.NoError(t, err)
wc := New(
WithLogger(zaptest.NewLogger(t)),
WithPath(filepath.Join(dir, "writecache")),
WithSmallObjectSize(smallSize),
WithMetabase(mb),
WithBlobstor(bs))
require.NoError(t, wc.Open(false))
require.NoError(t, wc.Init())
var prm common.PutPrm
prm.Address = objectCore.AddressOf(obj)
prm.Object = obj
prm.RawData = data
// First set mode for metabase and blobstor to prevent background flushes.
require.NoError(t, mb.SetMode(mode.ReadOnly))
require.NoError(t, bs.SetMode(mode.ReadOnly))
_, err = wc.Put(prm)
require.NoError(t, err)
objects[i] = objectPair{addr: addr, obj: obj}
return wc, bs, mb
}
t.Run("must be read-only", func(t *testing.T) {
require.ErrorIs(t, wc.Flush(), errMustBeReadOnly)
putObjects := func(t *testing.T, c Cache) []objectPair {
objects := make([]objectPair, objCount)
for i := range objects {
obj, data := newObject(t, 1+(i%2)*smallSize)
addr := objectCore.AddressOf(obj)
var prm common.PutPrm
prm.Address = objectCore.AddressOf(obj)
prm.Object = obj
prm.RawData = data
_, err := c.Put(prm)
require.NoError(t, err)
objects[i] = objectPair{addr: addr, obj: obj}
}
return objects
}
check := func(t *testing.T, mb *meta.DB, bs *blobstor.BlobStor, objects []objectPair) {
for i := range objects {
var mPrm meta.StorageIDPrm
mPrm.SetAddress(objects[i].addr)
mRes, err := mb.StorageID(mPrm)
require.NoError(t, err)
var prm common.GetPrm
prm.Address = objects[i].addr
prm.StorageID = mRes.StorageID()
res, err := bs.Get(prm)
require.NoError(t, err)
require.Equal(t, objects[i].obj, res.Object)
}
}
t.Run("no errors", func(t *testing.T) {
wc, bs, mb := newCache(t)
objects := putObjects(t, wc)
t.Run("must be read-only", func(t *testing.T) {
require.ErrorIs(t, wc.Flush(false), errMustBeReadOnly)
})
require.NoError(t, wc.SetMode(mode.ReadOnly))
require.NoError(t, bs.SetMode(mode.ReadWrite))
require.NoError(t, mb.SetMode(mode.ReadWrite))
wc.(*cache).flushed.Add(objects[0].addr.EncodeToString(), true)
wc.(*cache).flushed.Add(objects[1].addr.EncodeToString(), false)
require.NoError(t, wc.Flush(false))
for i := 0; i < 2; i++ {
var mPrm meta.GetPrm
mPrm.SetAddress(objects[i].addr)
_, err := mb.Get(mPrm)
require.Error(t, err)
_, err = bs.Get(common.GetPrm{Address: objects[i].addr})
require.Error(t, err)
}
check(t, mb, bs, objects[2:])
})
require.NoError(t, wc.SetMode(mode.ReadOnly))
require.NoError(t, bs.SetMode(mode.ReadWrite))
require.NoError(t, mb.SetMode(mode.ReadWrite))
t.Run("ignore errors", func(t *testing.T) {
testIgnoreErrors := func(t *testing.T, f func(*cache)) {
wc, bs, mb := newCache(t)
objects := putObjects(t, wc)
f(wc.(*cache))
wc.(*cache).flushed.Add(objects[0].addr.EncodeToString(), true)
wc.(*cache).flushed.Add(objects[1].addr.EncodeToString(), false)
require.NoError(t, wc.SetMode(mode.ReadOnly))
require.NoError(t, bs.SetMode(mode.ReadWrite))
require.NoError(t, mb.SetMode(mode.ReadWrite))
require.NoError(t, wc.Flush())
require.Error(t, wc.Flush(false))
require.NoError(t, wc.Flush(true))
for i := 0; i < 2; i++ {
var mPrm meta.GetPrm
mPrm.SetAddress(objects[i].addr)
_, err := mb.Get(mPrm)
require.Error(t, err)
check(t, mb, bs, objects)
}
t.Run("db, invalid address", func(t *testing.T) {
testIgnoreErrors(t, func(c *cache) {
_, data := newObject(t, 1)
require.NoError(t, c.db.Batch(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
return b.Put([]byte{1, 2, 3}, data)
}))
})
})
t.Run("db, invalid object", func(t *testing.T) {
testIgnoreErrors(t, func(c *cache) {
require.NoError(t, c.db.Batch(func(tx *bbolt.Tx) error {
b := tx.Bucket(defaultBucket)
return b.Put([]byte(oidtest.Address().EncodeToString()), []byte{1, 2, 3})
}))
})
})
t.Run("fs, read error", func(t *testing.T) {
testIgnoreErrors(t, func(c *cache) {
obj, data := newObject(t, 1)
_, err = bs.Get(common.GetPrm{Address: objects[i].addr})
require.Error(t, err)
}
var prm common.PutPrm
prm.Address = objectCore.AddressOf(obj)
prm.RawData = data
for i := 2; i < objCount; i++ {
var mPrm meta.StorageIDPrm
mPrm.SetAddress(objects[i].addr)
_, err := c.fsTree.Put(prm)
require.NoError(t, err)
mRes, err := mb.StorageID(mPrm)
require.NoError(t, err)
p := prm.Address.Object().EncodeToString() + "." + prm.Address.Container().EncodeToString()
p = filepath.Join(c.fsTree.RootPath, p[:1], p[1:])
var prm common.GetPrm
prm.Address = objects[i].addr
prm.StorageID = mRes.StorageID()
_, err = os.Stat(p) // sanity check
require.NoError(t, err)
require.NoError(t, os.Chmod(p, 0))
})
})
t.Run("fs, invalid object", func(t *testing.T) {
testIgnoreErrors(t, func(c *cache) {
var prm common.PutPrm
prm.Address = oidtest.Address()
prm.RawData = []byte{1, 2, 3}
_, err := c.fsTree.Put(prm)
require.NoError(t, err)
})
})
})
}
res, err := bs.Get(prm)
require.NoError(t, err)
require.Equal(t, objects[i].obj, res.Object)
}
func newObject(t *testing.T, size int) (*object.Object, []byte) {
obj := object.New()
ver := versionSDK.Current()
obj.SetID(oidtest.ID())
obj.SetOwnerID(usertest.ID())
obj.SetContainerID(cidtest.ID())
obj.SetType(object.TypeRegular)
obj.SetVersion(&ver)
obj.SetPayloadChecksum(checksumtest.Checksum())
obj.SetPayloadHomomorphicHash(checksumtest.Checksum())
obj.SetPayload(make([]byte, size))
data, err := obj.Marshal()
require.NoError(t, err)
return obj, data
}
type dummyEpoch struct{}

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

@ -28,7 +28,7 @@ type Cache interface {
SetMode(mode.Mode) error
SetLogger(*zap.Logger)
DumpInfo() Info
Flush() error
Flush(bool) error
Init() error
Open(readOnly bool) error