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cmd, core, ethdb, node: move chain freezer one folder deeper (#25487) 

* cmd, core, ethdb, node: create chain freezer in a sub folder

* core/rawdb: remove unused code

* core, ethdb, node: add AncientDatadir API back

* cmd, core: extend freezer info dump for sub-ancient-store

* core/rawdb: rework freezer inspector

* core/rawdb: address comments from Peter

* core/rawdb: fix build issue
This commit is contained in:
rjl493456442 2022-08-08 17:08:36 +08:00 committed by GitHub
parent f67e54c92f
commit e44d6551c3
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
13 changed files with 191 additions and 113 deletions
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53
cmd/geth/dbcmd.go
View File

@ -22,7 +22,6 @@ import (
"os"
"os/signal"
"path/filepath"
"sort"
"strconv"
"strings"
"syscall"
@ -160,8 +159,8 @@ WARNING: This is a low-level operation which may cause database corruption!`,
dbDumpFreezerIndex = &cli.Command{
Action: freezerInspect,
Name: "freezer-index",
Usage: "Dump out the index of a given freezer type",
ArgsUsage: "<type> <start (int)> <end (int)>",
Usage: "Dump out the index of a specific freezer table",
ArgsUsage: "<freezer-type> <table-type> <start (int)> <end (int)>",
Flags: flags.Merge([]cli.Flag{
utils.SyncModeFlag,
}, utils.NetworkFlags, utils.DatabasePathFlags),
@ -275,7 +274,7 @@ func inspect(ctx *cli.Context) error {
start []byte
)
if ctx.NArg() > 2 {
return fmt.Errorf("Max 2 arguments: %v", ctx.Command.ArgsUsage)
return fmt.Errorf("max 2 arguments: %v", ctx.Command.ArgsUsage)
}
if ctx.NArg() >= 1 {
if d, err := hexutil.Decode(ctx.Args().Get(0)); err != nil {
@ -536,43 +535,35 @@ func dbDumpTrie(ctx *cli.Context) error {
}
func freezerInspect(ctx *cli.Context) error {
var (
start, end int64
disableSnappy bool
err error
)
if ctx.NArg() < 3 {
if ctx.NArg() < 4 {
return fmt.Errorf("required arguments: %v", ctx.Command.ArgsUsage)
}
kind := ctx.Args().Get(0)
if noSnap, ok := rawdb.FreezerNoSnappy[kind]; !ok {
var options []string
for opt := range rawdb.FreezerNoSnappy {
options = append(options, opt)
}
sort.Strings(options)
return fmt.Errorf("Could read freezer-type '%v'. Available options: %v", kind, options)
} else {
disableSnappy = noSnap
}
if start, err = strconv.ParseInt(ctx.Args().Get(1), 10, 64); err != nil {
log.Info("Could read start-param", "error", err)
var (
freezer = ctx.Args().Get(0)
table = ctx.Args().Get(1)
)
start, err := strconv.ParseInt(ctx.Args().Get(2), 10, 64)
if err != nil {
log.Info("Could not read start-param", "err", err)
return err
}
if end, err = strconv.ParseInt(ctx.Args().Get(2), 10, 64); err != nil {
log.Info("Could read count param", "error", err)
end, err := strconv.ParseInt(ctx.Args().Get(3), 10, 64)
if err != nil {
log.Info("Could not read count param", "err", err)
return err
}
stack, _ := makeConfigNode(ctx)
defer stack.Close()
path := filepath.Join(stack.ResolvePath("chaindata"), "ancient")
log.Info("Opening freezer", "location", path, "name", kind)
if f, err := rawdb.NewFreezerTable(path, kind, disableSnappy, true); err != nil {
db := utils.MakeChainDatabase(ctx, stack, true)
defer db.Close()
ancient, err := db.AncientDatadir()
if err != nil {
log.Info("Failed to retrieve ancient root", "err", err)
return err
} else {
f.DumpIndex(start, end)
}
return nil
return rawdb.InspectFreezerTable(ancient, freezer, table, start, end)
}
func importLDBdata(ctx *cli.Context) error {

2
cmd/utils/flags.go
View File

@ -91,7 +91,7 @@ var (
}
AncientFlag = &flags.DirectoryFlag{
Name: "datadir.ancient",
Usage: "Data directory for ancient chain segments (default = inside chaindata)",
Usage: "Root directory for ancient data (default = inside chaindata)",
Category: flags.EthCategory,
}
MinFreeDiskSpaceFlag = &flags.DirectoryFlag{

26
core/rawdb/accessors_chain.go
View File

@ -37,7 +37,7 @@ import (
func ReadCanonicalHash(db ethdb.Reader, number uint64) common.Hash {
var data []byte
db.ReadAncients(func(reader ethdb.AncientReaderOp) error {
data, _ = reader.Ancient(freezerHashTable, number)
data, _ = reader.Ancient(chainFreezerHashTable, number)
if len(data) == 0 {
// Get it by hash from leveldb
data, _ = db.Get(headerHashKey(number))
@ -335,7 +335,7 @@ func ReadHeaderRange(db ethdb.Reader, number uint64, count uint64) []rlp.RawValu
}
// read remaining from ancients
max := count * 700
data, err := db.AncientRange(freezerHeaderTable, i+1-count, count, max)
data, err := db.AncientRange(chainFreezerHeaderTable, i+1-count, count, max)
if err == nil && uint64(len(data)) == count {
// the data is on the order [h, h+1, .., n] -- reordering needed
for i := range data {
@ -352,7 +352,7 @@ func ReadHeaderRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValu
// First try to look up the data in ancient database. Extra hash
// comparison is necessary since ancient database only maintains
// the canonical data.
data, _ = reader.Ancient(freezerHeaderTable, number)
data, _ = reader.Ancient(chainFreezerHeaderTable, number)
if len(data) > 0 && crypto.Keccak256Hash(data) == hash {
return nil
}
@ -428,7 +428,7 @@ func deleteHeaderWithoutNumber(db ethdb.KeyValueWriter, hash common.Hash, number
// isCanon is an internal utility method, to check whether the given number/hash
// is part of the ancient (canon) set.
func isCanon(reader ethdb.AncientReaderOp, number uint64, hash common.Hash) bool {
h, err := reader.Ancient(freezerHashTable, number)
h, err := reader.Ancient(chainFreezerHashTable, number)
if err != nil {
return false
}
@ -444,7 +444,7 @@ func ReadBodyRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValue
db.ReadAncients(func(reader ethdb.AncientReaderOp) error {
// Check if the data is in ancients
if isCanon(reader, number, hash) {
data, _ = reader.Ancient(freezerBodiesTable, number)
data, _ = reader.Ancient(chainFreezerBodiesTable, number)
return nil
}
// If not, try reading from leveldb
@ -459,7 +459,7 @@ func ReadBodyRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValue
func ReadCanonicalBodyRLP(db ethdb.Reader, number uint64) rlp.RawValue {
var data []byte
db.ReadAncients(func(reader ethdb.AncientReaderOp) error {
data, _ = reader.Ancient(freezerBodiesTable, number)
data, _ = reader.Ancient(chainFreezerBodiesTable, number)
if len(data) > 0 {
return nil
}
@ -527,7 +527,7 @@ func ReadTdRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValue {
db.ReadAncients(func(reader ethdb.AncientReaderOp) error {
// Check if the data is in ancients
if isCanon(reader, number, hash) {
data, _ = reader.Ancient(freezerDifficultyTable, number)
data, _ = reader.Ancient(chainFreezerDifficultyTable, number)
return nil
}
// If not, try reading from leveldb
@ -587,7 +587,7 @@ func ReadReceiptsRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawVa
db.ReadAncients(func(reader ethdb.AncientReaderOp) error {
// Check if the data is in ancients
if isCanon(reader, number, hash) {
data, _ = reader.Ancient(freezerReceiptTable, number)
data, _ = reader.Ancient(chainFreezerReceiptTable, number)
return nil
}
// If not, try reading from leveldb
@ -819,19 +819,19 @@ func WriteAncientBlocks(db ethdb.AncientWriter, blocks []*types.Block, receipts
func writeAncientBlock(op ethdb.AncientWriteOp, block *types.Block, header *types.Header, receipts []*types.ReceiptForStorage, td *big.Int) error {
num := block.NumberU64()
if err := op.AppendRaw(freezerHashTable, num, block.Hash().Bytes()); err != nil {
if err := op.AppendRaw(chainFreezerHashTable, num, block.Hash().Bytes()); err != nil {
return fmt.Errorf("can't add block %d hash: %v", num, err)
}
if err := op.Append(freezerHeaderTable, num, header); err != nil {
if err := op.Append(chainFreezerHeaderTable, num, header); err != nil {
return fmt.Errorf("can't append block header %d: %v", num, err)
}
if err := op.Append(freezerBodiesTable, num, block.Body()); err != nil {
if err := op.Append(chainFreezerBodiesTable, num, block.Body()); err != nil {
return fmt.Errorf("can't append block body %d: %v", num, err)
}
if err := op.Append(freezerReceiptTable, num, receipts); err != nil {
if err := op.Append(chainFreezerReceiptTable, num, receipts); err != nil {
return fmt.Errorf("can't append block %d receipts: %v", num, err)
}
if err := op.Append(freezerDifficultyTable, num, td); err != nil {
if err := op.Append(chainFreezerDifficultyTable, num, td); err != nil {
return fmt.Errorf("can't append block %d total difficulty: %v", num, err)
}
return nil

86
core/rawdb/ancient_scheme.go Normal file
View File

@ -0,0 +1,86 @@
// 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 "fmt"
// The list of table names of chain freezer.
const (
// chainFreezerHeaderTable indicates the name of the freezer header table.
chainFreezerHeaderTable = "headers"
// chainFreezerHashTable indicates the name of the freezer canonical hash table.
chainFreezerHashTable = "hashes"
// chainFreezerBodiesTable indicates the name of the freezer block body table.
chainFreezerBodiesTable = "bodies"
// chainFreezerReceiptTable indicates the name of the freezer receipts table.
chainFreezerReceiptTable = "receipts"
// chainFreezerDifficultyTable indicates the name of the freezer total difficulty table.
chainFreezerDifficultyTable = "diffs"
)
// chainFreezerNoSnappy configures whether compression is disabled for the ancient-tables.
// Hashes and difficulties don't compress well.
var chainFreezerNoSnappy = map[string]bool{
chainFreezerHeaderTable: false,
chainFreezerHashTable: true,
chainFreezerBodiesTable: false,
chainFreezerReceiptTable: false,
chainFreezerDifficultyTable: true,
}
// The list of identifiers of ancient stores.
var (
chainFreezerName = "chain" // the folder name of chain segment ancient store.
)
// freezers the collections of all builtin freezers.
var freezers = []string{chainFreezerName}
// InspectFreezerTable dumps out the index of a specific freezer table. The passed
// ancient indicates the path of root ancient directory where the chain freezer can
// be opened. Start and end specify the range for dumping out indexes.
// Note this function can only be used for debugging purposes.
func InspectFreezerTable(ancient string, freezerName string, tableName string, start, end int64) error {
var (
path string
tables map[string]bool
)
switch freezerName {
case chainFreezerName:
path, tables = resolveChainFreezerDir(ancient), chainFreezerNoSnappy
default:
return fmt.Errorf("unknown freezer, supported ones: %v", freezers)
}
noSnappy, exist := tables[tableName]
if !exist {
var names []string
for name := range tables {
names = append(names, name)
}
return fmt.Errorf("unknown table, supported ones: %v", names)
}
table, err := newFreezerTable(path, tableName, noSnappy, true)
if err != nil {
return err
}
table.dumpIndexStdout(start, end)
return nil
}

10
core/rawdb/chain_freezer.go
View File

@ -278,19 +278,19 @@ func (f *chainFreezer) freezeRange(nfdb *nofreezedb, number, limit uint64) (hash
}
// Write to the batch.
if err := op.AppendRaw(freezerHashTable, number, hash[:]); err != nil {
if err := op.AppendRaw(chainFreezerHashTable, number, hash[:]); err != nil {
return fmt.Errorf("can't write hash to Freezer: %v", err)
}
if err := op.AppendRaw(freezerHeaderTable, number, header); err != nil {
if err := op.AppendRaw(chainFreezerHeaderTable, number, header); err != nil {
return fmt.Errorf("can't write header to Freezer: %v", err)
}
if err := op.AppendRaw(freezerBodiesTable, number, body); err != nil {
if err := op.AppendRaw(chainFreezerBodiesTable, number, body); err != nil {
return fmt.Errorf("can't write body to Freezer: %v", err)
}
if err := op.AppendRaw(freezerReceiptTable, number, receipts); err != nil {
if err := op.AppendRaw(chainFreezerReceiptTable, number, receipts); err != nil {
return fmt.Errorf("can't write receipts to Freezer: %v", err)
}
if err := op.AppendRaw(freezerDifficultyTable, number, td); err != nil {
if err := op.AppendRaw(chainFreezerDifficultyTable, number, td); err != nil {
return fmt.Errorf("can't write td to Freezer: %v", err)
}

2
core/rawdb/chain_iterator.go
View File

@ -50,7 +50,7 @@ func InitDatabaseFromFreezer(db ethdb.Database) {
if i+count > frozen {
count = frozen - i
}
data, err := db.AncientRange(freezerHashTable, i, count, 32*count)
data, err := db.AncientRange(chainFreezerHashTable, i, count, 32*count)
if err != nil {
log.Crit("Failed to init database from freezer", "err", err)
}

50
core/rawdb/database.go
View File

@ -21,6 +21,7 @@ import (
"errors"
"fmt"
"os"
"path"
"sync/atomic"
"time"
@ -34,10 +35,16 @@ import (
// freezerdb is a database wrapper that enabled freezer data retrievals.
type freezerdb struct {
ancientRoot string
ethdb.KeyValueStore
ethdb.AncientStore
}
// AncientDatadir returns the path of root ancient directory.
func (frdb *freezerdb) AncientDatadir() (string, error) {
return frdb.ancientRoot, nil
}
// Close implements io.Closer, closing both the fast key-value store as well as
// the slow ancient tables.
func (frdb *freezerdb) Close() error {
@ -162,12 +169,36 @@ func NewDatabase(db ethdb.KeyValueStore) ethdb.Database {
return &nofreezedb{KeyValueStore: db}
}
// resolveChainFreezerDir is a helper function which resolves the absolute path
// of chain freezer by considering backward compatibility.
func resolveChainFreezerDir(ancient string) string {
// Check if the chain freezer is already present in the specified
// sub folder, if not then two possibilities:
// - chain freezer is not initialized
// - chain freezer exists in legacy location (root ancient folder)
freezer := path.Join(ancient, chainFreezerName)
if !common.FileExist(freezer) {
if !common.FileExist(ancient) {
// The entire ancient store is not initialized, still use the sub
// folder for initialization.
} else {
// Ancient root is already initialized, then we hold the assumption
// that chain freezer is also initialized and located in root folder.
// In this case fallback to legacy location.
freezer = ancient
log.Info("Found legacy ancient chain path", "location", ancient)
}
}
return freezer
}
// NewDatabaseWithFreezer creates a high level database on top of a given key-
// value data store with a freezer moving immutable chain segments into cold
// storage.
func NewDatabaseWithFreezer(db ethdb.KeyValueStore, freezer string, namespace string, readonly bool) (ethdb.Database, error) {
// storage. The passed ancient indicates the path of root ancient directory
// where the chain freezer can be opened.
func NewDatabaseWithFreezer(db ethdb.KeyValueStore, ancient string, namespace string, readonly bool) (ethdb.Database, error) {
// Create the idle freezer instance
frdb, err := newChainFreezer(freezer, namespace, readonly, freezerTableSize, FreezerNoSnappy)
frdb, err := newChainFreezer(resolveChainFreezerDir(ancient), namespace, readonly, freezerTableSize, chainFreezerNoSnappy)
if err != nil {
return nil, err
}
@ -198,7 +229,7 @@ func NewDatabaseWithFreezer(db ethdb.KeyValueStore, freezer string, namespace st
// If the freezer already contains something, ensure that the genesis blocks
// match, otherwise we might mix up freezers across chains and destroy both
// the freezer and the key-value store.
frgenesis, err := frdb.Ancient(freezerHashTable, 0)
frgenesis, err := frdb.Ancient(chainFreezerHashTable, 0)
if err != nil {
return nil, fmt.Errorf("failed to retrieve genesis from ancient %v", err)
} else if !bytes.Equal(kvgenesis, frgenesis) {
@ -244,6 +275,7 @@ func NewDatabaseWithFreezer(db ethdb.KeyValueStore, freezer string, namespace st
}()
}
return &freezerdb{
ancientRoot: ancient,
KeyValueStore: db,
AncientStore: frdb,
}, nil
@ -273,13 +305,15 @@ func NewLevelDBDatabase(file string, cache int, handles int, namespace string, r
}
// NewLevelDBDatabaseWithFreezer creates a persistent key-value database with a
// freezer moving immutable chain segments into cold storage.
func NewLevelDBDatabaseWithFreezer(file string, cache int, handles int, freezer string, namespace string, readonly bool) (ethdb.Database, error) {
// freezer moving immutable chain segments into cold storage. The passed ancient
// indicates the path of root ancient directory where the chain freezer can be
// opened.
func NewLevelDBDatabaseWithFreezer(file string, cache int, handles int, ancient string, namespace string, readonly bool) (ethdb.Database, error) {
kvdb, err := leveldb.New(file, cache, handles, namespace, readonly)
if err != nil {
return nil, err
}
frdb, err := NewDatabaseWithFreezer(kvdb, freezer, namespace, readonly)
frdb, err := NewDatabaseWithFreezer(kvdb, ancient, namespace, readonly)
if err != nil {
kvdb.Close()
return nil, err
@ -441,7 +475,7 @@ func InspectDatabase(db ethdb.Database, keyPrefix, keyStart []byte) error {
}
// Inspect append-only file store then.
ancientSizes := []*common.StorageSize{&ancientHeadersSize, &ancientBodiesSize, &ancientReceiptsSize, &ancientHashesSize, &ancientTdsSize}
for i, category := range []string{freezerHeaderTable, freezerBodiesTable, freezerReceiptTable, freezerHashTable, freezerDifficultyTable} {
for i, category := range []string{chainFreezerHeaderTable, chainFreezerBodiesTable, chainFreezerReceiptTable, chainFreezerHashTable, chainFreezerDifficultyTable} {
if size, err := db.AncientSize(category); err == nil {
*ancientSizes[i] += common.StorageSize(size)
total += common.StorageSize(size)

11
core/rawdb/freezer.go
View File

@ -68,8 +68,6 @@ type Freezer struct {
frozen uint64 // Number of blocks already frozen
tail uint64 // Number of the first stored item in the freezer
datadir string // Path of root directory of ancient store
// This lock synchronizes writers and the truncate operation, as well as
// the "atomic" (batched) read operations.
writeLock sync.RWMutex
@ -111,7 +109,6 @@ func NewFreezer(datadir string, namespace string, readonly bool, maxTableSize ui
readonly: readonly,
tables: make(map[string]*freezerTable),
instanceLock: lock,
datadir: datadir,
}
// Create the tables.
@ -429,7 +426,7 @@ func (f *Freezer) MigrateTable(kind string, convert convertLegacyFn) error {
// Set up new dir for the migrated table, the content of which
// we'll at the end move over to the ancients dir.
migrationPath := filepath.Join(ancientsPath, "migration")
newTable, err := NewFreezerTable(migrationPath, kind, table.noCompression, false)
newTable, err := newFreezerTable(migrationPath, kind, table.noCompression, false)
if err != nil {
return err
}
@ -486,11 +483,5 @@ func (f *Freezer) MigrateTable(kind string, convert convertLegacyFn) error {
if err := os.Remove(migrationPath); err != nil {
return err
}
return nil
}
// AncientDatadir returns the root directory path of the ancient store.
func (f *Freezer) AncientDatadir() (string, error) {
return f.datadir, nil
}

8
core/rawdb/freezer_table.go
View File

@ -123,8 +123,8 @@ type freezerTable struct {
lock sync.RWMutex // Mutex protecting the data file descriptors
}
// NewFreezerTable opens the given path as a freezer table.
func NewFreezerTable(path, name string, disableSnappy, readonly bool) (*freezerTable, error) {
// newFreezerTable opens the given path as a freezer table.
func newFreezerTable(path, name string, disableSnappy, readonly bool) (*freezerTable, error) {
return newTable(path, name, metrics.NilMeter{}, metrics.NilMeter{}, metrics.NilGauge{}, freezerTableSize, disableSnappy, readonly)
}
@ -884,9 +884,7 @@ func (t *freezerTable) Sync() error {
return t.head.Sync()
}
// DumpIndex is a debug print utility function, mainly for testing. It can also
// be used to analyse a live freezer table index.
func (t *freezerTable) DumpIndex(start, stop int64) {
func (t *freezerTable) dumpIndexStdout(start, stop int64) {
t.dumpIndex(os.Stdout, start, stop)
}

2
core/rawdb/freezer_table_test.go
View File

@ -902,7 +902,7 @@ func TestSequentialRead(t *testing.T) {
}
// Write 15 bytes 30 times
writeChunks(t, f, 30, 15)
f.DumpIndex(0, 30)
f.dumpIndexStdout(0, 30)
f.Close()
}
{ // Open it, iterate, verify iteration

27
core/rawdb/schema.go
View File

@ -111,33 +111,6 @@ var (
preimageHitCounter = metrics.NewRegisteredCounter("db/preimage/hits", nil)
)
const (
// freezerHeaderTable indicates the name of the freezer header table.
freezerHeaderTable = "headers"
// freezerHashTable indicates the name of the freezer canonical hash table.
freezerHashTable = "hashes"
// freezerBodiesTable indicates the name of the freezer block body table.
freezerBodiesTable = "bodies"
// freezerReceiptTable indicates the name of the freezer receipts table.
freezerReceiptTable = "receipts"
// freezerDifficultyTable indicates the name of the freezer total difficulty table.
freezerDifficultyTable = "diffs"
)
// FreezerNoSnappy configures whether compression is disabled for the ancient-tables.
// Hashes and difficulties don't compress well.
var FreezerNoSnappy = map[string]bool{
freezerHeaderTable: false,
freezerHashTable: true,
freezerBodiesTable: false,
freezerReceiptTable: false,
freezerDifficultyTable: true,
}
// LegacyTxLookupEntry is the legacy TxLookupEntry definition with some unnecessary
// fields.
type LegacyTxLookupEntry struct {

5
ethdb/database.go
View File

@ -142,7 +142,9 @@ type AncientWriteOp interface {
// AncientStater wraps the Stat method of a backing data store.
type AncientStater interface {
// AncientDatadir returns the root directory path of the ancient store.
// AncientDatadir returns the path of root ancient directory. Empty string
// will be returned if ancient store is not enabled at all. The returned
// path can be used to construct the path of other freezers.
AncientDatadir() (string, error)
}
@ -172,7 +174,6 @@ type Stater interface {
type AncientStore interface {
AncientReader
AncientWriter
AncientStater
io.Closer
}

22
node/node.go
View File

@ -703,7 +703,7 @@ func (n *Node) OpenDatabase(name string, cache, handles int, namespace string, r
// also attaching a chain freezer to it that moves ancient chain data from the
// database to immutable append-only files. If the node is an ephemeral one, a
// memory database is returned.
func (n *Node) OpenDatabaseWithFreezer(name string, cache, handles int, freezer, namespace string, readonly bool) (ethdb.Database, error) {
func (n *Node) OpenDatabaseWithFreezer(name string, cache, handles int, ancient string, namespace string, readonly bool) (ethdb.Database, error) {
n.lock.Lock()
defer n.lock.Unlock()
if n.state == closedState {
@ -715,14 +715,7 @@ func (n *Node) OpenDatabaseWithFreezer(name string, cache, handles int, freezer,
if n.config.DataDir == "" {
db = rawdb.NewMemoryDatabase()
} else {
root := n.ResolvePath(name)
switch {
case freezer == "":
freezer = filepath.Join(root, "ancient")
case !filepath.IsAbs(freezer):
freezer = n.ResolvePath(freezer)
}
db, err = rawdb.NewLevelDBDatabaseWithFreezer(root, cache, handles, freezer, namespace, readonly)
db, err = rawdb.NewLevelDBDatabaseWithFreezer(n.ResolvePath(name), cache, handles, n.ResolveAncient(name, ancient), namespace, readonly)
}
if err == nil {
@ -736,6 +729,17 @@ func (n *Node) ResolvePath(x string) string {
return n.config.ResolvePath(x)
}
// ResolveAncient returns the absolute path of the root ancient directory.
func (n *Node) ResolveAncient(name string, ancient string) string {
switch {
case ancient == "":
ancient = filepath.Join(n.ResolvePath(name), "ancient")
case !filepath.IsAbs(ancient):
ancient = n.ResolvePath(ancient)
}
return ancient
}
// closeTrackingDB wraps the Close method of a database. When the database is closed by the
// service, the wrapper removes it from the node's database map. This ensures that Node
// won't auto-close the database if it is closed by the service that opened it.