dash/blackcoin-more
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Do not keep fully spent but unwritten CCoins entries cached.

Browse Source 
Instead of storing CCoins entries directly in CCoinsMap, store a CCoinsCacheEntry
which additionally keeps track of whether a particular entry is:
* dirty: potentially different from its parent view.
* fresh: the parent view is known to not have a non-pruned version.

This allows us to skip non-dirty cache entries when pushing batches of changes up,
and to remove CCoins entries about transactions that are fully spent before the
parent cache learns about them.
This commit is contained in:
Pieter Wuille
2014-09-03 09:37:47 +02:00
parent c9d1a81ce7
commit 058b08c147
4 changed files with 88 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/txdb.cpp
View File

@@ -45,17 +45,22 @@ uint256 CCoinsViewDB::GetBestBlock() const {
}
bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) {
LogPrint("coindb", "Committing %u changed transactions to coin database...\n", (unsigned int)mapCoins.size());
CLevelDBBatch batch;
size_t count = 0;
size_t changed = 0;
for (CCoinsMap::iterator it = mapCoins.begin(); it != mapCoins.end();) {
BatchWriteCoins(batch, it->first, it->second);
if (it->second.flags & CCoinsCacheEntry::DIRTY) {
BatchWriteCoins(batch, it->first, it->second.coins);
changed++;
}
count++;
CCoinsMap::iterator itOld = it++;
mapCoins.erase(itOld);
}
if (hashBlock != uint256(0))
BatchWriteHashBestChain(batch, hashBlock);
LogPrint("coindb", "Committing %u changed transactions (out of %u) to coin database...\n", (unsigned int)changed, (unsigned int)count);
return db.WriteBatch(batch);
}