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main.go
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main.go
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package main
import (
"fmt"
"io/ioutil"
"os"
"time"
"github.com/furyaxyz/fuxchain/libs/iavl"
tmdb "github.com/furyaxyz/fuxchain/libs/tm-db"
)
// stores is the list of stores in the CosmosHub database
// FIXME would be nice to autodetect this
var stores = []string{
"acc",
"distribution",
"evidence",
"god",
"main",
"mint",
"params",
"slashing",
"staking",
"supply",
"upgrade",
}
// Stats track import/export statistics
type Stats struct {
nodes uint64
leafNodes uint64
size uint64
duration time.Duration
}
func (s *Stats) Add(o Stats) {
s.nodes += o.nodes
s.leafNodes += o.leafNodes
s.size += o.size
s.duration += o.duration
}
func (s *Stats) AddDurationSince(started time.Time) {
s.duration += time.Since(started)
}
func (s *Stats) AddNode(node *iavl.ExportNode) {
s.nodes++
if node.Height == 0 {
s.leafNodes++
}
s.size += uint64(len(node.Key) + len(node.Value) + 8 + 1)
}
func (s *Stats) String() string {
return fmt.Sprintf("%v nodes (%v leaves) in %v with size %v MB",
s.nodes, s.leafNodes, s.duration.Round(time.Millisecond), s.size/1024/1024)
}
// main runs the main program
func main() {
if len(os.Args) != 2 {
fmt.Fprintf(os.Stderr, "Usage: %v <dbpath>\n", os.Args[0])
os.Exit(1)
}
err := run(os.Args[1])
if err != nil {
fmt.Fprintf(os.Stderr, "Error: %v\n", err.Error())
os.Exit(1)
}
}
// run runs the command with normal error handling
func run(dbPath string) error {
version, exports, err := runExport(dbPath)
if err != nil {
return err
}
err = runImport(version, exports)
if err != nil {
return err
}
return nil
}
// runExport runs an export benchmark and returns a map of store names/export nodes
func runExport(dbPath string) (int64, map[string][]*iavl.ExportNode, error) {
ldb := tmdb.NewDB("application", tmdb.GoLevelDBBackend, dbPath)
tree, err := iavl.NewMutableTree(tmdb.NewPrefixDB(ldb, []byte("s/k:main/")), 0)
if err != nil {
return 0, nil, err
}
version, err := tree.LoadVersion(0)
if err != nil {
return 0, nil, err
}
fmt.Printf("Exporting cosmoshub database at version %v\n\n", version)
exports := make(map[string][]*iavl.ExportNode, len(stores))
totalStats := Stats{}
for _, name := range stores {
db := tmdb.NewPrefixDB(ldb, []byte("s/k:"+name+"/"))
tree, err := iavl.NewMutableTree(db, 0)
if err != nil {
return 0, nil, err
}
stats := Stats{}
export := make([]*iavl.ExportNode, 0, 100000)
storeVersion, err := tree.LoadVersion(0)
if err != nil {
return 0, nil, err
}
if storeVersion == 0 {
fmt.Printf("%-13v: %v\n", name, stats.String())
continue
}
itree, err := tree.GetImmutable(version)
if err != nil {
return 0, nil, err
}
start := time.Now().UTC()
exporter := itree.Export()
defer exporter.Close()
for {
node, err := exporter.Next()
if err == iavl.ExportDone {
break
} else if err != nil {
return 0, nil, err
}
export = append(export, node)
stats.AddNode(node)
}
stats.AddDurationSince(start)
fmt.Printf("%-13v: %v\n", name, stats.String())
totalStats.Add(stats)
exports[name] = export
}
fmt.Printf("\nExported %v stores with %v\n\n", len(stores), totalStats.String())
return version, exports, nil
}
// runImport runs an import benchmark with nodes exported from runExport()
func runImport(version int64, exports map[string][]*iavl.ExportNode) error {
fmt.Print("Importing into new LevelDB stores\n\n")
totalStats := Stats{}
for _, name := range stores {
tempdir, err := ioutil.TempDir("", name)
if err != nil {
return err
}
defer os.RemoveAll(tempdir)
start := time.Now()
stats := Stats{}
newDB := tmdb.NewDB(name, tmdb.GoLevelDBBackend, tempdir)
newTree, err := iavl.NewMutableTree(newDB, 0)
if err != nil {
return err
}
importer, err := newTree.Import(version)
if err != nil {
return err
}
defer importer.Close()
for _, node := range exports[name] {
err = importer.Add(node)
if err != nil {
return err
}
stats.AddNode(node)
}
err = importer.Commit()
if err != nil {
return err
}
stats.AddDurationSince(start)
fmt.Printf("%-12v: %v\n", name, stats.String())
totalStats.Add(stats)
}
fmt.Printf("\nImported %v stores with %v\n", len(stores), totalStats.String())
return nil
}