forked from cerc-io/plugeth
core/rawdb: implement resettable freezer (#26324)
This PR implements resettable freezer by adding a ResettableFreezer wrapper. The resettable freezer wraps the original freezer in a way that makes it possible to ensure atomic resets. Implementation wise, it relies on the os.Rename and os.RemoveAll to atomically delete the original freezer data and re-create a new one from scratch.
This commit is contained in:
rjl493456442
GitHub
parent
d3411b9f67
commit
79a478bb61
233
core/rawdb/freezer_resettable.go
Normal file
233
core/rawdb/freezer_resettable.go
Normal file
@ -0,0 +1,233 @@
|
||||
// Copyright 2022 The go-ethereum Authors
|
||||
// This file is part of the go-ethereum library.
|
||||
//
|
||||
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// The go-ethereum library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
||||
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
package rawdb
|
||||
|
||||
import (
|
||||
"os"
|
||||
"path/filepath"
|
||||
"sync"
|
||||
|
||||
"github.com/ethereum/go-ethereum/ethdb"
|
||||
)
|
||||
|
||||
const tmpSuffix = ".tmp"
|
||||
|
||||
// freezerOpenFunc is the function used to open/create a freezer.
|
||||
type freezerOpenFunc = func() (*Freezer, error)
|
||||
|
||||
// ResettableFreezer is a wrapper of the freezer which makes the
|
||||
// freezer resettable.
|
||||
type ResettableFreezer struct {
|
||||
freezer *Freezer
|
||||
opener freezerOpenFunc
|
||||
datadir string
|
||||
lock sync.RWMutex
|
||||
}
|
||||
|
||||
// NewResettableFreezer creates a resettable freezer, note freezer is
|
||||
// only resettable if the passed file directory is exclusively occupied
|
||||
// by the freezer. And also the user-configurable ancient root directory
|
||||
// is **not** supported for reset since it might be a mount and rename
|
||||
// will cause a copy of hundreds of gigabyte into local directory. It
|
||||
// needs some other file based solutions.
|
||||
//
|
||||
// The reset function will delete directory atomically and re-create the
|
||||
// freezer from scratch.
|
||||
func NewResettableFreezer(datadir string, namespace string, readonly bool, maxTableSize uint32, tables map[string]bool) (*ResettableFreezer, error) {
|
||||
if err := cleanup(datadir); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
opener := func() (*Freezer, error) {
|
||||
return NewFreezer(datadir, namespace, readonly, maxTableSize, tables)
|
||||
}
|
||||
freezer, err := opener()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &ResettableFreezer{
|
||||
freezer: freezer,
|
||||
opener: opener,
|
||||
datadir: datadir,
|
||||
}, nil
|
||||
}
|
||||
|
||||
// Reset deletes the file directory exclusively occupied by the freezer and
|
||||
// recreate the freezer from scratch. The atomicity of directory deletion
|
||||
// is guaranteed by the rename operation, the leftover directory will be
|
||||
// cleaned up in next startup in case crash happens after rename.
|
||||
func (f *ResettableFreezer) Reset() error {
|
||||
f.lock.Lock()
|
||||
defer f.lock.Unlock()
|
||||
|
||||
if err := f.freezer.Close(); err != nil {
|
||||
return err
|
||||
}
|
||||
tmp := tmpName(f.datadir)
|
||||
if err := os.Rename(f.datadir, tmp); err != nil {
|
||||
return err
|
||||
}
|
||||
if err := os.RemoveAll(tmp); err != nil {
|
||||
return err
|
||||
}
|
||||
freezer, err := f.opener()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
f.freezer = freezer
|
||||
return nil
|
||||
}
|
||||
|
||||
// Close terminates the chain freezer, unmapping all the data files.
|
||||
func (f *ResettableFreezer) Close() error {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.Close()
|
||||
}
|
||||
|
||||
// HasAncient returns an indicator whether the specified ancient data exists
|
||||
// in the freezer
|
||||
func (f *ResettableFreezer) HasAncient(kind string, number uint64) (bool, error) {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.HasAncient(kind, number)
|
||||
}
|
||||
|
||||
// Ancient retrieves an ancient binary blob from the append-only immutable files.
|
||||
func (f *ResettableFreezer) Ancient(kind string, number uint64) ([]byte, error) {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.Ancient(kind, number)
|
||||
}
|
||||
|
||||
// AncientRange retrieves multiple items in sequence, starting from the index 'start'.
|
||||
// It will return
|
||||
// - at most 'max' items,
|
||||
// - at least 1 item (even if exceeding the maxByteSize), but will otherwise
|
||||
// return as many items as fit into maxByteSize
|
||||
func (f *ResettableFreezer) AncientRange(kind string, start, count, maxBytes uint64) ([][]byte, error) {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.AncientRange(kind, start, count, maxBytes)
|
||||
}
|
||||
|
||||
// Ancients returns the length of the frozen items.
|
||||
func (f *ResettableFreezer) Ancients() (uint64, error) {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.Ancients()
|
||||
}
|
||||
|
||||
// Tail returns the number of first stored item in the freezer.
|
||||
func (f *ResettableFreezer) Tail() (uint64, error) {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.Tail()
|
||||
}
|
||||
|
||||
// AncientSize returns the ancient size of the specified category.
|
||||
func (f *ResettableFreezer) AncientSize(kind string) (uint64, error) {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.AncientSize(kind)
|
||||
}
|
||||
|
||||
// ReadAncients runs the given read operation while ensuring that no writes take place
|
||||
// on the underlying freezer.
|
||||
func (f *ResettableFreezer) ReadAncients(fn func(ethdb.AncientReaderOp) error) (err error) {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.ReadAncients(fn)
|
||||
}
|
||||
|
||||
// ModifyAncients runs the given write operation.
|
||||
func (f *ResettableFreezer) ModifyAncients(fn func(ethdb.AncientWriteOp) error) (writeSize int64, err error) {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.ModifyAncients(fn)
|
||||
}
|
||||
|
||||
// TruncateHead discards any recent data above the provided threshold number.
|
||||
func (f *ResettableFreezer) TruncateHead(items uint64) error {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.TruncateHead(items)
|
||||
}
|
||||
|
||||
// TruncateTail discards any recent data below the provided threshold number.
|
||||
func (f *ResettableFreezer) TruncateTail(tail uint64) error {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.TruncateTail(tail)
|
||||
}
|
||||
|
||||
// Sync flushes all data tables to disk.
|
||||
func (f *ResettableFreezer) Sync() error {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.Sync()
|
||||
}
|
||||
|
||||
// MigrateTable processes the entries in a given table in sequence
|
||||
// converting them to a new format if they're of an old format.
|
||||
func (f *ResettableFreezer) MigrateTable(kind string, convert convertLegacyFn) error {
|
||||
f.lock.RLock()
|
||||
defer f.lock.RUnlock()
|
||||
|
||||
return f.freezer.MigrateTable(kind, convert)
|
||||
}
|
||||
|
||||
// cleanup removes the directory located in the specified path
|
||||
// has the name with deletion marker suffix.
|
||||
func cleanup(path string) error {
|
||||
parent := filepath.Dir(path)
|
||||
if _, err := os.Lstat(parent); os.IsNotExist(err) {
|
||||
return nil
|
||||
}
|
||||
dir, err := os.Open(parent)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
names, err := dir.Readdirnames(0)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if cerr := dir.Close(); cerr != nil {
|
||||
return cerr
|
||||
}
|
||||
for _, name := range names {
|
||||
if name == filepath.Base(path)+tmpSuffix {
|
||||
return os.RemoveAll(filepath.Join(parent, name))
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func tmpName(path string) string {
|
||||
return filepath.Join(filepath.Dir(path), filepath.Base(path)+tmpSuffix)
|
||||
}
|
||||
107
core/rawdb/freezer_resettable_test.go
Normal file
107
core/rawdb/freezer_resettable_test.go
Normal file
@ -0,0 +1,107 @@
|
||||
// Copyright 2022 The go-ethereum Authors
|
||||
// This file is part of the go-ethereum library.
|
||||
//
|
||||
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// The go-ethereum library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
||||
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
package rawdb
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"os"
|
||||
"testing"
|
||||
|
||||
"github.com/ethereum/go-ethereum/ethdb"
|
||||
)
|
||||
|
||||
func TestResetFreezer(t *testing.T) {
|
||||
items := []struct {
|
||||
id uint64
|
||||
blob []byte
|
||||
}{
|
||||
{0, bytes.Repeat([]byte{0}, 2048)},
|
||||
{1, bytes.Repeat([]byte{1}, 2048)},
|
||||
{2, bytes.Repeat([]byte{2}, 2048)},
|
||||
}
|
||||
f, _ := NewResettableFreezer(t.TempDir(), "", false, 2048, freezerTestTableDef)
|
||||
defer f.Close()
|
||||
|
||||
f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
|
||||
for _, item := range items {
|
||||
op.AppendRaw("test", item.id, item.blob)
|
||||
}
|
||||
return nil
|
||||
})
|
||||
for _, item := range items {
|
||||
blob, _ := f.Ancient("test", item.id)
|
||||
if !bytes.Equal(blob, item.blob) {
|
||||
t.Fatal("Unexpected blob")
|
||||
}
|
||||
}
|
||||
|
||||
// Reset freezer
|
||||
f.Reset()
|
||||
count, _ := f.Ancients()
|
||||
if count != 0 {
|
||||
t.Fatal("Failed to reset freezer")
|
||||
}
|
||||
for _, item := range items {
|
||||
blob, _ := f.Ancient("test", item.id)
|
||||
if len(blob) != 0 {
|
||||
t.Fatal("Unexpected blob")
|
||||
}
|
||||
}
|
||||
|
||||
// Fill the freezer
|
||||
f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
|
||||
for _, item := range items {
|
||||
op.AppendRaw("test", item.id, item.blob)
|
||||
}
|
||||
return nil
|
||||
})
|
||||
for _, item := range items {
|
||||
blob, _ := f.Ancient("test", item.id)
|
||||
if !bytes.Equal(blob, item.blob) {
|
||||
t.Fatal("Unexpected blob")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestFreezerCleanup(t *testing.T) {
|
||||
items := []struct {
|
||||
id uint64
|
||||
blob []byte
|
||||
}{
|
||||
{0, bytes.Repeat([]byte{0}, 2048)},
|
||||
{1, bytes.Repeat([]byte{1}, 2048)},
|
||||
{2, bytes.Repeat([]byte{2}, 2048)},
|
||||
}
|
||||
datadir := t.TempDir()
|
||||
f, _ := NewResettableFreezer(datadir, "", false, 2048, freezerTestTableDef)
|
||||
f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
|
||||
for _, item := range items {
|
||||
op.AppendRaw("test", item.id, item.blob)
|
||||
}
|
||||
return nil
|
||||
})
|
||||
f.Close()
|
||||
os.Rename(datadir, tmpName(datadir))
|
||||
|
||||
// Open the freezer again, trigger cleanup operation
|
||||
f, _ = NewResettableFreezer(datadir, "", false, 2048, freezerTestTableDef)
|
||||
f.Close()
|
||||
|
||||
if _, err := os.Lstat(tmpName(datadir)); !os.IsNotExist(err) {
|
||||
t.Fatal("Failed to cleanup leftover directory")
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user