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zcash-patched-for-explorer
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Skip reindexed blocks individually 

Instead of skipping to the last reindexed block in each file (which could
jump over processed out-of-order blocks), just skip each already processed
block individually.
This commit is contained in:
Pieter Wuille 2014-10-07 21:15:32 +02:00
parent ad96e7ccd9
commit 16d5194165
1 changed files with 18 additions and 35 deletions
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53
src/main.cpp
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@ -3078,15 +3078,6 @@ bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp)
try {
// This takes over fileIn and calls fclose() on it in the CBufferedFile destructor
CBufferedFile blkdat(fileIn, 2*MAX_BLOCK_SIZE, MAX_BLOCK_SIZE+8, SER_DISK, CLIENT_VERSION);
uint64_t nStartByte = 0;
if (dbp) {
// (try to) skip already indexed part
CBlockFileInfo info;
if (pblocktree->ReadBlockFileInfo(dbp->nFile, info)) {
nStartByte = info.nSize;
blkdat.Seek(info.nSize);
}
}
uint64_t nRewind = blkdat.GetPos();
while (!blkdat.eof()) {
boost::this_thread::interruption_point();
@ -3114,40 +3105,32 @@ bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp)
try {
// read block
uint64_t nBlockPos = blkdat.GetPos();
if (nBlockPos < nStartByte) // skip already indexed part
continue;
if (dbp)
dbp->nPos = nBlockPos;
blkdat.SetLimit(nBlockPos + nSize);
// read block header
CBlockHeader blockhdr;
blkdat >> blockhdr;
nRewind = blkdat.GetPos();
// process block header
uint256 hash = blockhdr.GetHash();
if (hash != Params().HashGenesisBlock() && mapBlockIndex.find(blockhdr.hashPrevBlock) == mapBlockIndex.end()) {
LogPrint("reindex", "%s: Out of order block %s, parent %s not known\n", __func__, hash.ToString(),
blockhdr.hashPrevBlock.ToString());
if (dbp)
mapBlocksUnknownParent.insert(std::make_pair(blockhdr.hashPrevBlock, *dbp));
// TODO a slight optimization would be: blkdat.Skip(nSize - 80)
continue;
}
// read block
blkdat.SetPos(nBlockPos);
CBlock block;
blkdat >> block;
nRewind = blkdat.GetPos();
// process block
CValidationState state;
if (ProcessBlock(state, NULL, &block, dbp))
nLoaded++;
if (state.IsError())
break;
// detect out of order blocks, and store them for later
uint256 hash = block.GetHash();
if (hash != Params().HashGenesisBlock() && mapBlockIndex.find(block.hashPrevBlock) == mapBlockIndex.end()) {
LogPrint("reindex", "%s: Out of order block %s, parent %s not known\n", __func__, hash.ToString(),
block.hashPrevBlock.ToString());
if (dbp)
mapBlocksUnknownParent.insert(std::make_pair(block.hashPrevBlock, *dbp));
continue;
}
// process in case the block isn't known yet
if (mapBlockIndex.count(hash) == 0) {
CValidationState state;
if (ProcessBlock(state, NULL, &block, dbp))
nLoaded++;
if (state.IsError())
break;
}
// Recursively process earlier encountered successors of this block
deque<uint256> queue;