mirror of https://github.com/status-im/op-geth.git
100 lines
2.9 KiB
Go
100 lines
2.9 KiB
Go
// Copyright 2020 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 les
|
|
|
|
import (
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/common/math"
|
|
"github.com/ethereum/go-ethereum/core"
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
)
|
|
|
|
// pruner is responsible for pruning historical light chain data.
|
|
type pruner struct {
|
|
db ethdb.Database
|
|
indexers []*core.ChainIndexer
|
|
closeCh chan struct{}
|
|
wg sync.WaitGroup
|
|
}
|
|
|
|
// newPruner returns a light chain pruner instance.
|
|
func newPruner(db ethdb.Database, indexers ...*core.ChainIndexer) *pruner {
|
|
pruner := &pruner{
|
|
db: db,
|
|
indexers: indexers,
|
|
closeCh: make(chan struct{}),
|
|
}
|
|
pruner.wg.Add(1)
|
|
go pruner.loop()
|
|
return pruner
|
|
}
|
|
|
|
// close notifies all background goroutines belonging to pruner to exit.
|
|
func (p *pruner) close() {
|
|
close(p.closeCh)
|
|
p.wg.Wait()
|
|
}
|
|
|
|
// loop periodically queries the status of chain indexers and prunes useless
|
|
// historical chain data. Notably, whenever Geth restarts, it will iterate
|
|
// all historical sections even they don't exist at all(below checkpoint) so
|
|
// that light client can prune cached chain data that was ODRed after pruning
|
|
// that section.
|
|
func (p *pruner) loop() {
|
|
defer p.wg.Done()
|
|
|
|
// cleanTicker is the ticker used to trigger a history clean 2 times a day.
|
|
var cleanTicker = time.NewTicker(12 * time.Hour)
|
|
defer cleanTicker.Stop()
|
|
|
|
// pruning finds the sections that have been processed by all indexers
|
|
// and deletes all historical chain data.
|
|
// Note, if some indexers don't support pruning(e.g. eth.BloomIndexer),
|
|
// pruning operations can be silently ignored.
|
|
pruning := func() {
|
|
min := uint64(math.MaxUint64)
|
|
for _, indexer := range p.indexers {
|
|
sections, _, _ := indexer.Sections()
|
|
if sections < min {
|
|
min = sections
|
|
}
|
|
}
|
|
// Always keep the latest section data in database.
|
|
if min < 2 || len(p.indexers) == 0 {
|
|
return
|
|
}
|
|
for _, indexer := range p.indexers {
|
|
if err := indexer.Prune(min - 2); err != nil {
|
|
log.Debug("Failed to prune historical data", "err", err)
|
|
return
|
|
}
|
|
}
|
|
p.db.Compact(nil, nil) // Compact entire database, ensure all removed data are deleted.
|
|
}
|
|
for {
|
|
pruning()
|
|
select {
|
|
case <-cleanTicker.C:
|
|
case <-p.closeCh:
|
|
return
|
|
}
|
|
}
|
|
}
|