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zcash-patched-for-explorer
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Optimize database writes for transactions with lots of TxIns. 

Patch from ArtForz, who discovered the problem.
This commit is contained in:
Gavin Andresen 2011-09-05 14:33:07 -04:00
parent 7464e647de
commit e077cce617
1 changed files with 12 additions and 12 deletions
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24
src/main.cpp
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@ -813,7 +813,7 @@ bool CTransaction::ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPoo
// Read txindex // Read txindex
CTxIndex txindex; CTxIndex txindex;
bool fFound = true; bool fFound = true;
if (fMiner && mapTestPool.count(prevout.hash)) if ((fBlock || fMiner) && mapTestPool.count(prevout.hash))
{ {
// Get txindex from current proposed changes // Get txindex from current proposed changes
txindex = mapTestPool[prevout.hash]; txindex = mapTestPool[prevout.hash];
@ -873,12 +873,7 @@ bool CTransaction::ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPoo
txindex.vSpent[prevout.n] = posThisTx; txindex.vSpent[prevout.n] = posThisTx;
// Write back // Write back
if (fBlock) if (fBlock || fMiner)
{
if (!txdb.UpdateTxIndex(prevout.hash, txindex))
return error("ConnectInputs() : UpdateTxIndex failed");
}
else if (fMiner)
{ {
mapTestPool[prevout.hash] = txindex; mapTestPool[prevout.hash] = txindex;
} }
@ -900,9 +895,8 @@ bool CTransaction::ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPoo
if (fBlock) if (fBlock)
{ {
// Add transaction to disk index // Add transaction to changes
if (!txdb.AddTxIndex(*this, posThisTx, pindexBlock->nHeight)) mapTestPool[GetHash()] = CTxIndex(posThisTx, vout.size());
return error("ConnectInputs() : AddTxPos failed");
} }
else if (fMiner) else if (fMiner)
{ {
@ -991,16 +985,22 @@ bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex)
//// issue here: it doesn't know the version //// issue here: it doesn't know the version
unsigned int nTxPos = pindex->nBlockPos + ::GetSerializeSize(CBlock(), SER_DISK) - 1 + GetSizeOfCompactSize(vtx.size()); unsigned int nTxPos = pindex->nBlockPos + ::GetSerializeSize(CBlock(), SER_DISK) - 1 + GetSizeOfCompactSize(vtx.size());
map<uint256, CTxIndex> mapUnused; map<uint256, CTxIndex> mapQueuedChanges;
int64 nFees = 0; int64 nFees = 0;
BOOST_FOREACH(CTransaction& tx, vtx) BOOST_FOREACH(CTransaction& tx, vtx)
{ {
CDiskTxPos posThisTx(pindex->nFile, pindex->nBlockPos, nTxPos); CDiskTxPos posThisTx(pindex->nFile, pindex->nBlockPos, nTxPos);
nTxPos += ::GetSerializeSize(tx, SER_DISK); nTxPos += ::GetSerializeSize(tx, SER_DISK);
if (!tx.ConnectInputs(txdb, mapUnused, posThisTx, pindex, nFees, true, false)) if (!tx.ConnectInputs(txdb, mapQueuedChanges, posThisTx, pindex, nFees, true, false))
return false; return false;
} }
// Write queued txindex changes
for (map<uint256, CTxIndex>::iterator mi = mapQueuedChanges.begin(); mi != mapQueuedChanges.end(); ++mi)
{
if (!txdb.UpdateTxIndex((*mi).first, (*mi).second))
return error("ConnectBlock() : UpdateTxIndex failed");
}
if (vtx[0].GetValueOut() > GetBlockValue(pindex->nHeight, nFees)) if (vtx[0].GetValueOut() > GetBlockValue(pindex->nHeight, nFees))
return false; return false;