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blockchain: speedup fetching pruned contiguous tx blobs

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About twice as fast, very roughly
This commit is contained in:
moneromooo-monero
2019-11-12 18:40:37 +00:00
parent fe3f6a3e6b
commit 08635a0875
5 changed files with 70 additions and 3 deletions
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src/blockchain_db/lmdb/db_lmdb.cpp
+42
View File
@@ -3033,6 +3033,48 @@ bool BlockchainLMDB::get_pruned_tx_blob(const crypto::hash& h, cryptonote::blobd
return true;
}
bool BlockchainLMDB::get_pruned_tx_blobs_from(const crypto::hash& h, size_t count, std::vector<cryptonote::blobdata> &bd) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
if (!count)
return true;
TXN_PREFIX_RDONLY();
RCURSOR(tx_indices);
RCURSOR(txs_pruned);
bd.reserve(bd.size() + count);
MDB_val_set(v, h);
MDB_val result;
int res = mdb_cursor_get(m_cur_tx_indices, (MDB_val *)&zerokval, &v, MDB_GET_BOTH);
if (res == MDB_NOTFOUND)
return false;
if (res)
throw0(DB_ERROR(lmdb_error("DB error attempting to fetch tx from hash", res).c_str()));
const txindex *tip = (const txindex *)v.mv_data;
const uint64_t id = tip->data.tx_id;
MDB_val_set(val_tx_id, id);
MDB_cursor_op op = MDB_SET;
while (count--)
{
res = mdb_cursor_get(m_cur_txs_pruned, &val_tx_id, &result, op);
op = MDB_NEXT;
if (res == MDB_NOTFOUND)
return false;
if (res)
throw0(DB_ERROR(lmdb_error("DB error attempting to fetch tx blob", res).c_str()));
bd.emplace_back(reinterpret_cast<char*>(result.mv_data), result.mv_size);
}
TXN_POSTFIX_RDONLY();
return true;
}
bool BlockchainLMDB::get_prunable_tx_blob(const crypto::hash& h, cryptonote::blobdata &bd) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
src/blockchain_db/lmdb/db_lmdb.h
+1
View File
@@ -254,6 +254,7 @@ public:
virtual bool get_tx_blob(const crypto::hash& h, cryptonote::blobdata &tx) const;
virtual bool get_pruned_tx_blob(const crypto::hash& h, cryptonote::blobdata &tx) const;
virtual bool get_pruned_tx_blobs_from(const crypto::hash& h, size_t count, std::vector<cryptonote::blobdata> &bd) const;
virtual bool get_prunable_tx_blob(const crypto::hash& h, cryptonote::blobdata &tx) const;
virtual bool get_prunable_tx_hash(const crypto::hash& tx_hash, crypto::hash &prunable_hash) const;