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core/state: merge spent and unspent coins state, use it to store more things

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This change reduces pressure on DB by doing the following things:
 * not storing additional KV pair for SpentCoin
 * storing Output right in the UnspentCoin, thus eliminating the need to get a
   full transaction from DB

At the same time it makes UnspentCoin more fat and hot, but it should probably
worth it.

Also drop `GetUnspentCoinStateOrNew` as it shouldn't ever existed, UTXOs
can't come out of nowhere.

1.5M block import time (VerifyBlocks disabled) on AMD Ryzen 5 1600/16GB/HDD,
before:
real    302m9.895s
user    96m17.200s
sys     13m37.084s

after:
real    159m16.551s
user    69m58.279s
sys     7m34.334s

So it's almost two-fold which is a great improvement.
This commit is contained in:
Roman Khimov 2020-03-09 18:56:24 +03:00
parent e1f194ea7b
commit 23464401bc
7 changed files with 117 additions and 278 deletions
Download patch file Download diff file Expand all files Collapse all files

60
pkg/core/dao.go
View file

@ -175,20 +175,6 @@ func (dao *dao) AppendNEP5Transfer(acc util.Uint160, tr *state.NEP5Transfer) err
// -- start unspent coins.
// GetUnspentCoinStateOrNew gets UnspentCoinState from temporary or persistent Store
// and return it. If it's not present in both stores, returns a new
// UnspentCoinState.
func (dao *dao) GetUnspentCoinStateOrNew(hash util.Uint256) (*state.UnspentCoin, error) {
unspent, err := dao.GetUnspentCoinState(hash)
if err != nil {
if err != storage.ErrKeyNotFound {
return nil, err
}
unspent = state.NewUnspentCoin(0)
}
return unspent, nil
}
// GetUnspentCoinState retrieves UnspentCoinState from the given store.
func (dao *dao) GetUnspentCoinState(hash util.Uint256) (*state.UnspentCoin, error) {
unspent := &state.UnspentCoin{}
@ -208,45 +194,6 @@ func (dao *dao) PutUnspentCoinState(hash util.Uint256, ucs *state.UnspentCoin) e
// -- end unspent coins.
// -- start spent coins.
// GetSpentCoinsOrNew returns spent coins from store.
func (dao *dao) GetSpentCoinsOrNew(hash util.Uint256, height uint32) (*state.SpentCoin, error) {
spent, err := dao.GetSpentCoinState(hash)
if err != nil {
if err != storage.ErrKeyNotFound {
return nil, err
}
spent = state.NewSpentCoin(height)
}
return spent, nil
}
// GetSpentCoinState gets SpentCoinState from the given store.
func (dao *dao) GetSpentCoinState(hash util.Uint256) (*state.SpentCoin, error) {
spent := &state.SpentCoin{}
key := storage.AppendPrefix(storage.STSpentCoin, hash.BytesLE())
err := dao.GetAndDecode(spent, key)
if err != nil {
return nil, err
}
return spent, nil
}
// PutSpentCoinState puts given SpentCoinState into the given store.
func (dao *dao) PutSpentCoinState(hash util.Uint256, scs *state.SpentCoin) error {
key := storage.AppendPrefix(storage.STSpentCoin, hash.BytesLE())
return dao.Put(scs, key)
}
// DeleteSpentCoinState deletes given SpentCoinState from the given store.
func (dao *dao) DeleteSpentCoinState(hash util.Uint256) error {
key := storage.AppendPrefix(storage.STSpentCoin, hash.BytesLE())
return dao.store.Delete(key)
}
// -- end spent coins.
// -- start validator.
// GetValidatorStateOrNew gets validator from store or created new one in case of error.
@ -590,7 +537,7 @@ func (dao *dao) IsDoubleSpend(tx *transaction.Transaction) bool {
return false
}
for _, input := range inputs {
if int(input.PrevIndex) >= len(unspent.States) || (unspent.States[input.PrevIndex]&state.CoinSpent) != 0 {
if int(input.PrevIndex) >= len(unspent.States) || (unspent.States[input.PrevIndex].State&state.CoinSpent) != 0 {
return true
}
}
@ -605,13 +552,12 @@ func (dao *dao) IsDoubleClaim(claim *transaction.ClaimTX) bool {
}
for _, inputs := range transaction.GroupInputsByPrevHash(claim.Claims) {
prevHash := inputs[0].PrevHash
scs, err := dao.GetSpentCoinState(prevHash)
unspent, err := dao.GetUnspentCoinState(prevHash)
if err != nil {
return true
}
for _, input := range inputs {
_, ok := scs.Items[input.PrevIndex]
if !ok {
if int(input.PrevIndex) >= len(unspent.States) || (unspent.States[input.PrevIndex].State&state.CoinClaimed) != 0 {
return true
}
}