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les: historical data garbage collection (#19570)

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This change introduces garbage collection for the light client. Historical
chain data is deleted periodically. If you want to disable the GC, use
the --light.nopruning flag.
This commit is contained in:
gary rong
2020-07-13 17:02:54 +08:00
committed by GitHub
parent b8dd0890b3
commit 6eef141aef
45 changed files with 841 additions and 213 deletions
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20
light/lightchain.go
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@ -112,7 +112,7 @@ func NewLightChain(odr OdrBackend, config *params.ChainConfig, engine consensus.
if header := bc.GetHeaderByHash(hash); header != nil {
log.Error("Found bad hash, rewinding chain", "number", header.Number, "hash", header.ParentHash)
bc.SetHead(header.Number.Uint64() - 1)
log.Error("Chain rewind was successful, resuming normal operation")
log.Info("Chain rewind was successful, resuming normal operation")
}
}
return bc, nil
@ -155,7 +155,11 @@ func (lc *LightChain) loadLastState() error {
// Corrupt or empty database, init from scratch
lc.Reset()
} else {
if header := lc.GetHeaderByHash(head); header != nil {
header := lc.GetHeaderByHash(head)
if header == nil {
// Corrupt or empty database, init from scratch
lc.Reset()
} else {
lc.hc.SetCurrentHeader(header)
}
}
@ -163,7 +167,6 @@ func (lc *LightChain) loadLastState() error {
header := lc.hc.CurrentHeader()
headerTd := lc.GetTd(header.Hash(), header.Number.Uint64())
log.Info("Loaded most recent local header", "number", header.Number, "hash", header.Hash(), "td", headerTd, "age", common.PrettyAge(time.Unix(int64(header.Time), 0)))
return nil
}
@ -431,6 +434,17 @@ func (lc *LightChain) GetTdByHash(hash common.Hash) *big.Int {
return lc.hc.GetTdByHash(hash)
}
// GetHeaderByNumberOdr retrieves the total difficult from the database or
// network by hash and number, caching it (associated with its hash) if found.
func (lc *LightChain) GetTdOdr(ctx context.Context, hash common.Hash, number uint64) *big.Int {
td := lc.GetTd(hash, number)
if td != nil {
return td
}
td, _ = GetTd(ctx, lc.odr, hash, number)
return td
}
// GetHeader retrieves a block header from the database by hash and number,
// caching it if found.
func (lc *LightChain) GetHeader(hash common.Hash, number uint64) *types.Header {