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Don't cache block height, always get from DB

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Howard Chu 2017-01-14 11:27:52 -08:00 committed by Howard Chu
parent eb1fb6011a
commit c903c5541e
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GPG key ID: FD2A70B44AB11BA7
2 changed files with 29 additions and 14 deletions
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38
src/blockchain_db/lmdb/db_lmdb.cpp
View file

@ -543,6 +543,7 @@ uint64_t BlockchainLMDB::get_estimated_batch_size(uint64_t batch_num_blocks) con
uint64_t min_block_size = 4 * 1024;
uint64_t block_stop = 0;
uint64_t m_height = height();
if (m_height > 1)
block_stop = m_height - 1;
uint64_t block_start = 0;
@ -593,6 +594,7 @@ void BlockchainLMDB::add_block(const block& blk, const size_t& block_size, const
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_cursors *m_cursors = &m_wcursors;
uint64_t m_height = height();
CURSOR(block_heights)
blk_height bh = {blk_hash, m_height};
@ -654,6 +656,7 @@ void BlockchainLMDB::remove_block()
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
uint64_t m_height = height();
if (m_height == 0)
throw0(BLOCK_DNE ("Attempting to remove block from an empty blockchain"));
@ -691,6 +694,7 @@ uint64_t BlockchainLMDB::add_transaction_data(const crypto::hash& blk_hash, cons
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_cursors *m_cursors = &m_wcursors;
uint64_t m_height = height();
int result;
uint64_t tx_id = m_num_txs;
@ -787,6 +791,7 @@ uint64_t BlockchainLMDB::add_output(const crypto::hash& tx_hash,
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_cursors *m_cursors = &m_wcursors;
uint64_t m_height = height();
int result = 0;
@ -1018,7 +1023,6 @@ BlockchainLMDB::BlockchainLMDB(bool batch_transactions)
m_write_txn = nullptr;
m_write_batch_txn = nullptr;
m_batch_active = false;
m_height = 0;
m_cum_size = 0;
m_cum_count = 0;
@ -1143,7 +1147,7 @@ void BlockchainLMDB::open(const std::string& filename, const int mdb_flags)
if ((result = mdb_stat(txn, m_blocks, &db_stats)))
throw0(DB_ERROR(lmdb_error("Failed to query m_blocks: ", result).c_str()));
LOG_PRINT_L2("Setting m_height to: " << db_stats.ms_entries);
m_height = db_stats.ms_entries;
uint64_t m_height = db_stats.ms_entries;
// get and keep current number of txs
if ((result = mdb_stat(txn, m_txs, &db_stats)))
@ -1294,7 +1298,6 @@ void BlockchainLMDB::reset()
throw0(DB_ERROR(lmdb_error("Failed to write version to database: ", result).c_str()));
txn.commit();
m_height = 0;
m_num_outputs = 0;
m_cum_size = 0;
m_cum_count = 0;
@ -1515,6 +1518,7 @@ uint64_t BlockchainLMDB::get_top_block_timestamp() const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
uint64_t m_height = height();
// if no blocks, return 0
if (m_height == 0)
@ -1666,6 +1670,7 @@ crypto::hash BlockchainLMDB::top_block_hash() const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
uint64_t m_height = height();
if (m_height != 0)
{
return get_block_hash_from_height(m_height - 1);
@ -1678,6 +1683,7 @@ block BlockchainLMDB::get_top_block() const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
uint64_t m_height = height();
if (m_height != 0)
{
@ -1692,8 +1698,14 @@ uint64_t BlockchainLMDB::height() const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
TXN_PREFIX_RDONLY();
int result;
return m_height;
// get current height
MDB_stat db_stats;
if ((result = mdb_stat(m_txn, m_blocks, &db_stats)))
throw0(DB_ERROR(lmdb_error("Failed to query m_blocks: ", result).c_str()));
return db_stats.ms_entries;
}
bool BlockchainLMDB::tx_exists(const crypto::hash& h) const
@ -2498,6 +2510,7 @@ uint64_t BlockchainLMDB::add_block(const block& blk, const size_t& block_size, c
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
uint64_t m_height = height();
if (m_height % 1000 == 0)
{
@ -2551,8 +2564,6 @@ void BlockchainLMDB::pop_block(block& blk, std::vector<transaction>& txs)
block_txn_abort();
throw;
}
--m_height;
}
void BlockchainLMDB::get_output_tx_and_index_from_global(const std::vector<uint64_t> &global_indices,
@ -2843,7 +2854,7 @@ void BlockchainLMDB::fixup()
void BlockchainLMDB::migrate_0_1()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
uint64_t i, z;
uint64_t i, z, m_height;
int result;
mdb_txn_safe txn(false);
MDB_val k, v;
@ -2852,17 +2863,22 @@ void BlockchainLMDB::migrate_0_1()
LOG_PRINT_YELLOW("Migrating blockchain from DB version 0 to 1 - this may take a while:", LOG_LEVEL_0);
LOG_PRINT_L0("updating blocks, hf_versions, outputs, txs, and spent_keys tables...");
do {
result = mdb_txn_begin(m_env, NULL, 0, txn);
if (result)
throw0(DB_ERROR(lmdb_error("Failed to create a transaction for the db: ", result).c_str()));
MDB_stat db_stats;
if ((result = mdb_stat(txn, m_blocks, &db_stats)))
throw0(DB_ERROR(lmdb_error("Failed to query m_blocks: ", result).c_str()));
m_height = db_stats.ms_entries;
LOG_PRINT_L0("Total number of blocks: " << m_height);
LOG_PRINT_L1("block migration will update block_heights, block_info, and hf_versions...");
do {
LOG_PRINT_L1("migrating block_heights:");
MDB_dbi o_heights;
unsigned int flags;
result = mdb_txn_begin(m_env, NULL, 0, txn);
if (result)
throw0(DB_ERROR(lmdb_error("Failed to create a transaction for the db: ", result).c_str()));
result = mdb_dbi_flags(txn, m_block_heights, &flags);
if (result)
throw0(DB_ERROR(lmdb_error("Failed to retrieve block_heights flags: ", result).c_str()));

1
src/blockchain_db/lmdb/db_lmdb.h
View file

@ -367,7 +367,6 @@ private:
MDB_dbi m_properties;
uint64_t m_height;
uint64_t m_num_txs;
uint64_t m_num_outputs;
mutable uint64_t m_cum_size; // used in batch size estimation