c4a2b682ff
This PR introduces: - db.put to put a value into the database - db.get to read a value from the database - db.delete to delete a value from the database - db.stats to check compaction info from the database - db.compact to trigger a db compaction It also moves inspectdb to db.inspect.
342 lines
9.5 KiB
Go
342 lines
9.5 KiB
Go
// Copyright 2020 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// go-ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package main
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import (
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"fmt"
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"os"
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"path/filepath"
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"time"
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"github.com/ethereum/go-ethereum/cmd/utils"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/console/prompt"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/ethdb/leveldb"
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"github.com/ethereum/go-ethereum/log"
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"github.com/syndtr/goleveldb/leveldb/opt"
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"gopkg.in/urfave/cli.v1"
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)
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var (
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removedbCommand = cli.Command{
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Action: utils.MigrateFlags(removeDB),
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Name: "removedb",
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Usage: "Remove blockchain and state databases",
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ArgsUsage: "",
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Flags: []cli.Flag{
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utils.DataDirFlag,
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},
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Category: "DATABASE COMMANDS",
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Description: `
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Remove blockchain and state databases`,
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}
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dbCommand = cli.Command{
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Name: "db",
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Usage: "Low level database operations",
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ArgsUsage: "",
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Category: "DATABASE COMMANDS",
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Subcommands: []cli.Command{
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dbInspectCmd,
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dbStatCmd,
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dbCompactCmd,
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dbGetCmd,
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dbDeleteCmd,
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dbPutCmd,
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},
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}
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dbInspectCmd = cli.Command{
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Action: utils.MigrateFlags(inspect),
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Name: "inspect",
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ArgsUsage: "<prefix> <start>",
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Usage: "Inspect the storage size for each type of data in the database",
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Description: `This commands iterates the entire database. If the optional 'prefix' and 'start' arguments are provided, then the iteration is limited to the given subset of data.`,
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}
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dbStatCmd = cli.Command{
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Action: dbStats,
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Name: "stats",
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Usage: "Print leveldb statistics",
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}
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dbCompactCmd = cli.Command{
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Action: dbCompact,
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Name: "compact",
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Usage: "Compact leveldb database. WARNING: May take a very long time",
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Description: `This command performs a database compaction.
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WARNING: This operation may take a very long time to finish, and may cause database
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corruption if it is aborted during execution'!`,
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}
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dbGetCmd = cli.Command{
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Action: dbGet,
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Name: "get",
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Usage: "Show the value of a database key",
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ArgsUsage: "<hex-encoded key>",
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Description: "This command looks up the specified database key from the database.",
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}
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dbDeleteCmd = cli.Command{
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Action: dbDelete,
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Name: "delete",
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Usage: "Delete a database key (WARNING: may corrupt your database)",
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ArgsUsage: "<hex-encoded key>",
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Description: `This command deletes the specified database key from the database.
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WARNING: This is a low-level operation which may cause database corruption!`,
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}
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dbPutCmd = cli.Command{
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Action: dbPut,
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Name: "put",
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Usage: "Set the value of a database key (WARNING: may corrupt your database)",
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ArgsUsage: "<hex-encoded key> <hex-encoded value>",
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Description: `This command sets a given database key to the given value.
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WARNING: This is a low-level operation which may cause database corruption!`,
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}
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)
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func removeDB(ctx *cli.Context) error {
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stack, config := makeConfigNode(ctx)
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// Remove the full node state database
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path := stack.ResolvePath("chaindata")
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if common.FileExist(path) {
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confirmAndRemoveDB(path, "full node state database")
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} else {
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log.Info("Full node state database missing", "path", path)
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}
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// Remove the full node ancient database
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path = config.Eth.DatabaseFreezer
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switch {
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case path == "":
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path = filepath.Join(stack.ResolvePath("chaindata"), "ancient")
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case !filepath.IsAbs(path):
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path = config.Node.ResolvePath(path)
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}
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if common.FileExist(path) {
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confirmAndRemoveDB(path, "full node ancient database")
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} else {
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log.Info("Full node ancient database missing", "path", path)
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}
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// Remove the light node database
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path = stack.ResolvePath("lightchaindata")
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if common.FileExist(path) {
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confirmAndRemoveDB(path, "light node database")
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} else {
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log.Info("Light node database missing", "path", path)
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}
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return nil
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}
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// confirmAndRemoveDB prompts the user for a last confirmation and removes the
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// folder if accepted.
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func confirmAndRemoveDB(database string, kind string) {
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confirm, err := prompt.Stdin.PromptConfirm(fmt.Sprintf("Remove %s (%s)?", kind, database))
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switch {
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case err != nil:
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utils.Fatalf("%v", err)
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case !confirm:
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log.Info("Database deletion skipped", "path", database)
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default:
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start := time.Now()
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filepath.Walk(database, func(path string, info os.FileInfo, err error) error {
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// If we're at the top level folder, recurse into
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if path == database {
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return nil
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}
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// Delete all the files, but not subfolders
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if !info.IsDir() {
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os.Remove(path)
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return nil
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}
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return filepath.SkipDir
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})
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log.Info("Database successfully deleted", "path", database, "elapsed", common.PrettyDuration(time.Since(start)))
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}
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}
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func inspect(ctx *cli.Context) error {
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var (
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prefix []byte
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start []byte
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)
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if ctx.NArg() > 2 {
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return fmt.Errorf("Max 2 arguments: %v", ctx.Command.ArgsUsage)
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}
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if ctx.NArg() >= 1 {
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if d, err := hexutil.Decode(ctx.Args().Get(0)); err != nil {
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return fmt.Errorf("failed to hex-decode 'prefix': %v", err)
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} else {
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prefix = d
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}
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}
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if ctx.NArg() >= 2 {
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if d, err := hexutil.Decode(ctx.Args().Get(1)); err != nil {
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return fmt.Errorf("failed to hex-decode 'start': %v", err)
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} else {
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start = d
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}
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}
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stack, _ := makeConfigNode(ctx)
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defer stack.Close()
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_, chainDb := utils.MakeChain(ctx, stack, true)
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defer chainDb.Close()
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return rawdb.InspectDatabase(chainDb, prefix, start)
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}
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func showLeveldbStats(db ethdb.Stater) {
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if stats, err := db.Stat("leveldb.stats"); err != nil {
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log.Warn("Failed to read database stats", "error", err)
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} else {
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fmt.Println(stats)
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}
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if ioStats, err := db.Stat("leveldb.iostats"); err != nil {
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log.Warn("Failed to read database iostats", "error", err)
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} else {
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fmt.Println(ioStats)
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}
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}
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func dbStats(ctx *cli.Context) error {
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stack, _ := makeConfigNode(ctx)
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defer stack.Close()
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path := stack.ResolvePath("chaindata")
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db, err := leveldb.NewCustom(path, "", func(options *opt.Options) {
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options.ReadOnly = true
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})
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if err != nil {
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return err
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}
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showLeveldbStats(db)
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err = db.Close()
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if err != nil {
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log.Info("Close err", "error", err)
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}
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return nil
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}
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func dbCompact(ctx *cli.Context) error {
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stack, _ := makeConfigNode(ctx)
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defer stack.Close()
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path := stack.ResolvePath("chaindata")
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cache := ctx.GlobalInt(utils.CacheFlag.Name) * ctx.GlobalInt(utils.CacheDatabaseFlag.Name) / 100
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db, err := leveldb.NewCustom(path, "", func(options *opt.Options) {
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options.OpenFilesCacheCapacity = utils.MakeDatabaseHandles()
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options.BlockCacheCapacity = cache / 2 * opt.MiB
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options.WriteBuffer = cache / 4 * opt.MiB // Two of these are used internally
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})
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if err != nil {
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return err
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}
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showLeveldbStats(db)
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log.Info("Triggering compaction")
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err = db.Compact(nil, nil)
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if err != nil {
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log.Info("Compact err", "error", err)
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}
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showLeveldbStats(db)
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log.Info("Closing db")
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err = db.Close()
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if err != nil {
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log.Info("Close err", "error", err)
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}
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log.Info("Exiting")
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return err
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}
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// dbGet shows the value of a given database key
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func dbGet(ctx *cli.Context) error {
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if ctx.NArg() != 1 {
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return fmt.Errorf("required arguments: %v", ctx.Command.ArgsUsage)
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}
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stack, _ := makeConfigNode(ctx)
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defer stack.Close()
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path := stack.ResolvePath("chaindata")
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db, err := leveldb.NewCustom(path, "", func(options *opt.Options) {
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options.ReadOnly = true
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})
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if err != nil {
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return err
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}
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defer db.Close()
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key, err := hexutil.Decode(ctx.Args().Get(0))
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if err != nil {
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log.Info("Could not decode the key", "error", err)
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return err
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}
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data, err := db.Get(key)
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if err != nil {
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log.Info("Get operation failed", "error", err)
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return err
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}
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fmt.Printf("key %#x:\n\t%#x\n", key, data)
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return nil
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}
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// dbDelete deletes a key from the database
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func dbDelete(ctx *cli.Context) error {
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if ctx.NArg() != 1 {
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return fmt.Errorf("required arguments: %v", ctx.Command.ArgsUsage)
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}
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stack, _ := makeConfigNode(ctx)
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defer stack.Close()
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db := utils.MakeChainDatabase(ctx, stack)
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defer db.Close()
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key, err := hexutil.Decode(ctx.Args().Get(0))
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if err != nil {
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log.Info("Could not decode the key", "error", err)
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return err
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}
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if err = db.Delete(key); err != nil {
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log.Info("Delete operation returned an error", "error", err)
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return err
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}
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return nil
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}
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// dbPut overwrite a value in the database
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func dbPut(ctx *cli.Context) error {
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if ctx.NArg() != 2 {
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return fmt.Errorf("required arguments: %v", ctx.Command.ArgsUsage)
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}
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stack, _ := makeConfigNode(ctx)
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defer stack.Close()
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db := utils.MakeChainDatabase(ctx, stack)
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defer db.Close()
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var (
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key []byte
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value []byte
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data []byte
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err error
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)
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key, err = hexutil.Decode(ctx.Args().Get(0))
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if err != nil {
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log.Info("Could not decode the key", "error", err)
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return err
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}
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value, err = hexutil.Decode(ctx.Args().Get(1))
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if err != nil {
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log.Info("Could not decode the value", "error", err)
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return err
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}
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data, err = db.Get(key)
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if err == nil {
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fmt.Printf("Previous value:\n%#x\n", data)
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}
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return db.Put(key, value)
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}
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