store txids in memory, faster address subscription/history
This commit is contained in:
Jack Robison
parent
23bb5598d5
commit
9b4afe9816
3 changed files with 42 additions and 31 deletions
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@ -444,6 +444,7 @@ class BlockProcessor:
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append_hashX_by_tx(hashXs)
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update_touched(hashXs)
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self.db.total_transactions.append(tx_hash)
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tx_num += 1
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self.db.history.add_unflushed(hashXs_by_tx, self.tx_count)
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@ -491,6 +492,7 @@ class BlockProcessor:
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undo_entry_len = 12 + HASHX_LEN
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for tx, tx_hash in reversed(txs):
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self.db.total_transactions.pop()
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for idx, txout in enumerate(tx.outputs):
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# Spend the TX outputs. Be careful with unspendable
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# outputs - we didn't save those in the first place.
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@ -173,20 +173,20 @@ class History:
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self.logger.info(f'backing up removed {nremoves:,d} history entries')
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def get_txnums(self, hashX, limit=1000):
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"""Generator that returns an unpruned, sorted list of tx_nums in the
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history of a hashX. Includes both spending and receiving
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transactions. By default yields at most 1000 entries. Set
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limit to None to get them all. """
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limit = util.resolve_limit(limit)
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for key, hist in self.db.iterator(prefix=hashX):
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a = array.array('I')
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a.frombytes(hist)
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for tx_num in a:
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if limit == 0:
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return
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yield tx_num
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limit -= 1
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# def get_txnums(self, hashX, limit=1000):
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# """Generator that returns an unpruned, sorted list of tx_nums in the
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# history of a hashX. Includes both spending and receiving
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# transactions. By default yields at most 1000 entries. Set
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# limit to None to get them all. """
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# limit = util.resolve_limit(limit)
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# for key, hist in self.db.iterator(prefix=hashX):
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# a = array.array('I')
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# a.frombytes(hist)
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# for tx_num in a:
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# if limit == 0:
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# return
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# yield tx_num
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# limit -= 1
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#
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# History compaction
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@ -96,6 +96,7 @@ class LevelDB:
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self._block_txs_cache = pylru.lrucache(50000)
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self._merkle_tx_cache = pylru.lrucache(100000)
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self.total_transactions = None
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async def _read_tx_counts(self):
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if self.tx_counts is not None:
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@ -119,6 +120,18 @@ class LevelDB:
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else:
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assert self.db_tx_count == 0
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async def _read_txids(self):
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def get_txids():
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return list(self.tx_db.iterator(prefix=TX_HASH_PREFIX, include_key=False))
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start = time.perf_counter()
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self.logger.info("loading txids")
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txids = await asyncio.get_event_loop().run_in_executor(self.executor, get_txids)
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assert len(txids) == len(self.tx_counts) == 0 or len(txids) == self.tx_counts[-1]
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self.total_transactions = txids
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ts = time.perf_counter() - start
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self.logger.info("loaded %i txids in %ss", len(self.total_transactions), round(ts, 4))
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async def _read_headers(self):
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if self.headers is not None:
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return
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@ -169,6 +182,8 @@ class LevelDB:
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# Read TX counts (requires meta directory)
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await self._read_tx_counts()
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if self.total_transactions is None:
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await self._read_txids()
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await self._read_headers()
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def close(self):
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@ -452,10 +467,8 @@ class LevelDB:
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If the tx_height is not on disk, returns (None, tx_height)."""
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tx_height = bisect_right(self.tx_counts, tx_num)
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if tx_height > self.db_height:
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tx_hash = None
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else:
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tx_hash = self.tx_db.get(TX_HASH_PREFIX + util.pack_be_uint64(tx_num))
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return tx_hash, tx_height
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return None, tx_height
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return self.total_transactions[tx_num], tx_height
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async def tx_merkle(self, tx_num, tx_height):
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if tx_height == -1:
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@ -557,38 +570,34 @@ class LevelDB:
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# return hashx_history
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# return hashx_history
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def iter_tx_heights():
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def read_history():
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db_height = self.db_height
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tx_counts = self.tx_counts
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tx_db_get = self.tx_db.get
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pack_be_uint64 = util.pack_be_uint64
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cnt = 0
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txs = []
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for key, hist in self.history.db.iterator(prefix=hashX):
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for hist in self.history.db.iterator(prefix=hashX, include_key=False):
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a = array.array('I')
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a.frombytes(hist)
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for tx_num in a:
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tx_height = bisect_right(tx_counts, tx_num)
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if tx_height > db_height:
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yield None, tx_height
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return
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yield tx_db_get(TX_HASH_PREFIX + pack_be_uint64(tx_num)), tx_height
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txs.append((tx_num, tx_height))
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cnt += 1
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if limit and cnt >= limit:
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return
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break
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if limit and cnt >= limit:
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return
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def read_history():
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return [
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(tx_num, tx_height) for (tx_num, tx_height) in iter_tx_heights()
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]
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break
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return txs
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while True:
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history = await asyncio.get_event_loop().run_in_executor(self.executor, read_history)
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if not history or history[-1][0] is not None:
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return history
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if history is not None:
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return [(self.total_transactions[tx_num], tx_height) for (tx_num, tx_height) in history]
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self.logger.warning(f'limited_history: tx hash '
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f'not found (reorg?), retrying...')
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await sleep(0.25)
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