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Move fs flushes to same time as history flushes

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This commit is contained in:
Neil Booth 2016-11-15 06:28:52 +09:00
parent 8c55f41305
commit 8671e57183
1 changed files with 31 additions and 26 deletions
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57
server/block_processor.py
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@ -319,6 +319,8 @@ class BlockProcessor(server.db.DB):
super().__init__(env)
# These are our state as we move ahead of DB state
self.fs_height = self.db_height
self.fs_tx_count = self.db_tx_count
self.height = self.db_height
self.tip = self.db_tip
self.tx_count = self.db_tx_count
@ -526,7 +528,8 @@ class BlockProcessor(server.db.DB):
def assert_flushed(self):
'''Asserts state is fully flushed.'''
assert self.tx_count == self.db_tx_count
assert self.tx_count == self.fs_tx_count == self.db_tx_count
assert self.height == self.fs_height == self.db_height
assert not self.history
assert not self.utxo_cache
assert not self.db_cache
@ -563,9 +566,10 @@ class BlockProcessor(server.db.DB):
# time it took to commit the batch
self.flush_state(self.db)
self.logger.info('flush #{:,d} to height {:,d} txs: {:,d} took {:,d}s'
self.logger.info('flush #{:,d} to height {:,d} txs: {:,d} '
'took {:,.1f}s'
.format(self.flush_count, self.height, self.tx_count,
int(self.last_flush - flush_start)))
self.last_flush - flush_start))
# Catch-up stats
if show_stats:
@ -591,7 +595,12 @@ class BlockProcessor(server.db.DB):
formatted_time(tx_est / this_tx_per_sec)))
def flush_history(self, batch):
flush_start = time.time()
fs_flush_start = time.time()
self.fs_flush()
fs_flush_end = time.time()
self.logger.info('FS flush took {:.1f} seconds'
.format(fs_flush_end - fs_flush_start))
flush_id = pack('>H', self.flush_count)
for hash168, hist in self.history.items():
@ -599,21 +608,21 @@ class BlockProcessor(server.db.DB):
batch.put(key, hist.tobytes())
self.logger.info('flushed {:,d} history entries for {:,d} addrs '
'in {:,d}s'
'in {:.1f}s'
.format(self.history_size, len(self.history),
int(time.time() - flush_start)))
time.time() - fs_flush_end))
self.history = defaultdict(partial(array.array, 'I'))
self.history_size = 0
def fs_flush(self):
'''Flush the things stored on the filesystem.'''
blocks_done = len(self.headers)
prior_tx_count = (self.tx_counts[self.db_height]
if self.db_height >= 0 else 0)
prior_tx_count = (self.tx_counts[self.fs_height]
if self.fs_height >= 0 else 0)
cur_tx_count = self.tx_counts[-1] if self.tx_counts else 0
txs_done = cur_tx_count - prior_tx_count
assert self.db_height + blocks_done == self.height
assert self.fs_height + blocks_done == self.height
assert len(self.tx_hashes) == blocks_done
assert len(self.tx_counts) == self.height + 1
assert cur_tx_count == self.tx_count, \
@ -622,13 +631,13 @@ class BlockProcessor(server.db.DB):
# First the headers
headers = b''.join(self.headers)
header_len = self.coin.HEADER_LEN
self.headers_file.seek((self.db_height + 1) * header_len)
self.headers_file.seek((self.fs_height + 1) * header_len)
self.headers_file.write(headers)
self.headers_file.flush()
# Then the tx counts
self.txcount_file.seek((self.db_height + 1) * self.tx_counts.itemsize)
self.txcount_file.write(self.tx_counts[self.db_height + 1:])
self.txcount_file.seek((self.fs_height + 1) * self.tx_counts.itemsize)
self.txcount_file.write(self.tx_counts[self.fs_height + 1:])
self.txcount_file.flush()
# Finally the hashes
@ -648,7 +657,8 @@ class BlockProcessor(server.db.DB):
file_pos += size
os.sync()
self.fs_height = self.height
self.fs_tx_count = self.tx_count
self.tx_hashes = []
self.headers = []
@ -692,9 +702,9 @@ class BlockProcessor(server.db.DB):
utxo_cache_size = len(self.utxo_cache) * 187
db_cache_size = len(self.db_cache) * 105
hist_cache_size = len(self.history) * 180 + self.history_size * 4
tx_hash_size = (self.tx_count - self.db_tx_count) * 74
utxo_MB = (db_cache_size + utxo_cache_size + tx_hash_size) // one_MB
hist_MB = hist_cache_size // one_MB
tx_hash_size = (self.tx_count - self.fs_tx_count) * 74
utxo_MB = (db_cache_size + utxo_cache_size) // one_MB
hist_MB = (hist_cache_size + tx_hash_size) // one_MB
self.logger.info('UTXOs: {:,d} deletes: {:,d} '
'UTXOs {:,d}MB hist {:,d}MB'
@ -978,6 +988,7 @@ class BlockProcessor(server.db.DB):
# Care is needed because the writes generated by flushing the
# UTXO state may have keys in common with our write cache or
# may be in the DB already.
flush_start = time.time()
self.logger.info('flushing {:,d} blocks with {:,d} txs'
.format(self.height - self.db_height,
self.tx_count - self.db_tx_count))
@ -987,12 +998,6 @@ class BlockProcessor(server.db.DB):
self.utxo_cache_spends,
self.db_deletes))
fs_flush_start = time.time()
self.fs_flush()
fs_flush_end = time.time()
self.logger.info('FS flush took {:.1f} seconds'
.format(fs_flush_end - fs_flush_start))
collisions = 0
new_utxos = len(self.utxo_cache)
@ -1031,18 +1036,18 @@ class BlockProcessor(server.db.DB):
self.db_tip = self.tip
self.logger.info('UTXO flush took {:.1f} seconds'
.format(time.time() - fs_flush_end))
.format(time.time() - flush_start))
def read_headers(self, start, count):
# Read some from disk
disk_count = min(count, self.db_height + 1 - start)
disk_count = min(count, self.fs_height + 1 - start)
result = self.fs_read_headers(start, disk_count)
count -= disk_count
start += disk_count
# The rest from memory
if count:
start -= self.db_height + 1
start -= self.fs_height + 1
if not (count >= 0 and start + count <= len(self.headers)):
raise ChainError('{:,d} headers starting at {:,d} not on disk'
.format(count, start))
@ -1056,7 +1061,7 @@ class BlockProcessor(server.db.DB):
# Is this unflushed?
if tx_hash is None:
tx_hashes = self.tx_hashes[tx_height - (self.db_height + 1)]
tx_hashes = self.tx_hashes[tx_height - (self.fs_height + 1)]
tx_hash = tx_hashes[tx_num - self.tx_counts[tx_height - 1]]
return tx_hash, tx_height