207 lines
6.7 KiB
Go
207 lines
6.7 KiB
Go
// Copyright 2019 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 snapshot
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"math/big"
|
|
"time"
|
|
|
|
"github.com/VictoriaMetrics/fastcache"
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/rawdb"
|
|
"github.com/ethereum/go-ethereum/crypto"
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/ethereum/go-ethereum/rlp"
|
|
"github.com/ethereum/go-ethereum/trie"
|
|
)
|
|
|
|
var (
|
|
// emptyRoot is the known root hash of an empty trie.
|
|
emptyRoot = common.HexToHash("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421")
|
|
|
|
// emptyCode is the known hash of the empty EVM bytecode.
|
|
emptyCode = crypto.Keccak256Hash(nil)
|
|
)
|
|
|
|
// wipeSnapshot iterates over the entire key-value database and deletes all the
|
|
// data associated with the snapshot (accounts, storage, metadata). After all is
|
|
// done, the snapshot range of the database is compacted to free up unused data
|
|
// blocks.
|
|
func wipeSnapshot(db ethdb.KeyValueStore) error {
|
|
// Batch deletions together to avoid holding an iterator for too long
|
|
var (
|
|
batch = db.NewBatch()
|
|
items int
|
|
)
|
|
// Iterate over the snapshot key-range and delete all of them
|
|
log.Info("Deleting previous snapshot leftovers")
|
|
start, logged := time.Now(), time.Now()
|
|
|
|
it := db.NewIteratorWithStart(rawdb.StateSnapshotPrefix)
|
|
for it.Next() {
|
|
// Skip any keys with the correct prefix but wrong lenth (trie nodes)
|
|
key := it.Key()
|
|
if !bytes.HasPrefix(key, rawdb.StateSnapshotPrefix) {
|
|
break
|
|
}
|
|
if len(key) != len(rawdb.StateSnapshotPrefix)+common.HashLength && len(key) != len(rawdb.StateSnapshotPrefix)+2*common.HashLength {
|
|
continue
|
|
}
|
|
// Delete the key and periodically recreate the batch and iterator
|
|
batch.Delete(key)
|
|
items++
|
|
|
|
if items%10000 == 0 {
|
|
// Batch too large (or iterator too long lived, flush and recreate)
|
|
it.Release()
|
|
if err := batch.Write(); err != nil {
|
|
return err
|
|
}
|
|
batch.Reset()
|
|
it = db.NewIteratorWithStart(key)
|
|
|
|
if time.Since(logged) > 8*time.Second {
|
|
log.Info("Deleting previous snapshot leftovers", "wiped", items, "elapsed", time.Since(start))
|
|
logged = time.Now()
|
|
}
|
|
}
|
|
}
|
|
it.Release()
|
|
|
|
rawdb.DeleteSnapshotRoot(batch)
|
|
if err := batch.Write(); err != nil {
|
|
return err
|
|
}
|
|
log.Info("Deleted previous snapshot leftovers", "wiped", items, "elapsed", time.Since(start))
|
|
|
|
// Compact the snapshot section of the database to get rid of unused space
|
|
log.Info("Compacting snapshot area in database")
|
|
start = time.Now()
|
|
|
|
end := common.CopyBytes(rawdb.StateSnapshotPrefix)
|
|
end[len(end)-1]++
|
|
|
|
if err := db.Compact(rawdb.StateSnapshotPrefix, end); err != nil {
|
|
return err
|
|
}
|
|
log.Info("Compacted snapshot area in database", "elapsed", time.Since(start))
|
|
|
|
return nil
|
|
}
|
|
|
|
// generateSnapshot regenerates a brand new snapshot based on an existing state database and head block.
|
|
func generateSnapshot(db ethdb.KeyValueStore, journal string, root common.Hash) (snapshot, error) {
|
|
// Wipe any previously existing snapshot from the database
|
|
if err := wipeSnapshot(db); err != nil {
|
|
return nil, err
|
|
}
|
|
// Iterate the entire storage trie and re-generate the state snapshot
|
|
var (
|
|
accountCount int
|
|
storageCount int
|
|
storageNodes int
|
|
accountSize common.StorageSize
|
|
storageSize common.StorageSize
|
|
logged time.Time
|
|
)
|
|
batch := db.NewBatch()
|
|
triedb := trie.NewDatabase(db)
|
|
|
|
accTrie, err := trie.NewSecure(root, triedb)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
accIt := trie.NewIterator(accTrie.NodeIterator(nil))
|
|
for accIt.Next() {
|
|
var (
|
|
curStorageCount int
|
|
curStorageNodes int
|
|
curAccountSize common.StorageSize
|
|
curStorageSize common.StorageSize
|
|
accountHash = common.BytesToHash(accIt.Key)
|
|
)
|
|
var acc struct {
|
|
Nonce uint64
|
|
Balance *big.Int
|
|
Root common.Hash
|
|
CodeHash []byte
|
|
}
|
|
if err := rlp.DecodeBytes(accIt.Value, &acc); err != nil {
|
|
return nil, err
|
|
}
|
|
data := AccountRLP(acc.Nonce, acc.Balance, acc.Root, acc.CodeHash)
|
|
curAccountSize += common.StorageSize(1 + common.HashLength + len(data))
|
|
|
|
rawdb.WriteAccountSnapshot(batch, accountHash, data)
|
|
if batch.ValueSize() > ethdb.IdealBatchSize {
|
|
batch.Write()
|
|
batch.Reset()
|
|
}
|
|
if acc.Root != emptyRoot {
|
|
storeTrie, err := trie.NewSecure(acc.Root, triedb)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
storeIt := trie.NewIterator(storeTrie.NodeIterator(nil))
|
|
for storeIt.Next() {
|
|
curStorageSize += common.StorageSize(1 + 2*common.HashLength + len(storeIt.Value))
|
|
curStorageCount++
|
|
|
|
rawdb.WriteStorageSnapshot(batch, accountHash, common.BytesToHash(storeIt.Key), storeIt.Value)
|
|
if batch.ValueSize() > ethdb.IdealBatchSize {
|
|
batch.Write()
|
|
batch.Reset()
|
|
}
|
|
}
|
|
curStorageNodes = storeIt.Nodes
|
|
}
|
|
accountCount++
|
|
storageCount += curStorageCount
|
|
accountSize += curAccountSize
|
|
storageSize += curStorageSize
|
|
storageNodes += curStorageNodes
|
|
|
|
if time.Since(logged) > 8*time.Second {
|
|
fmt.Printf("%#x: %9s + %9s (%6d slots, %6d nodes), total %9s (%d accs, %d nodes) + %9s (%d slots, %d nodes)\n", accIt.Key, curAccountSize.TerminalString(), curStorageSize.TerminalString(), curStorageCount, curStorageNodes, accountSize.TerminalString(), accountCount, accIt.Nodes, storageSize.TerminalString(), storageCount, storageNodes)
|
|
logged = time.Now()
|
|
}
|
|
}
|
|
fmt.Printf("Totals: %9s (%d accs, %d nodes) + %9s (%d slots, %d nodes)\n", accountSize.TerminalString(), accountCount, accIt.Nodes, storageSize.TerminalString(), storageCount, storageNodes)
|
|
|
|
// Update the snapshot block marker and write any remainder data
|
|
rawdb.WriteSnapshotRoot(batch, root)
|
|
batch.Write()
|
|
batch.Reset()
|
|
|
|
// Compact the snapshot section of the database to get rid of unused space
|
|
log.Info("Compacting snapshot in chain database")
|
|
if err := db.Compact([]byte{'s'}, []byte{'s' + 1}); err != nil {
|
|
return nil, err
|
|
}
|
|
// New snapshot generated, construct a brand new base layer
|
|
cache := fastcache.New(512 * 1024 * 1024)
|
|
return &diskLayer{
|
|
journal: journal,
|
|
db: db,
|
|
cache: cache,
|
|
root: root,
|
|
}, nil
|
|
}
|