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[tests] make pruning test faster

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This commit makes the pruning.py much faster.

Key insights to do this:

- pruning.py doesn't care what kind of transactions make up the big
blocks that are pruned in the test. Instead of making blocks with
several large, expensive to construct and validate transactions,
instead make the large blocks contain a single coinbase transaction with
a huge OP_RETURN txout.
- avoid stop-starting nodes where possible.

This test could probably be made even faster by using the P2P interface
for submitting blocks instead of the submitblock RPC.
This commit is contained in:
John Newbery 2017-06-13 14:36:44 -04:00
parent 1c29ac40fb
commit 03d6d23810
1 changed files with 61 additions and 48 deletions
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109
test/functional/feature_pruning.py
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@ -8,12 +8,14 @@ WARNING:
This test uses 4GB of disk space.
This test takes 30 mins or more (up to 2 hours)
"""
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal, assert_greater_than, assert_raises_rpc_error, connect_nodes, mine_large_block, sync_blocks, wait_until
import os
from test_framework.blocktools import create_coinbase
from test_framework.messages import CBlock, ToHex
from test_framework.script import CScript, OP_RETURN, OP_NOP
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal, assert_greater_than, assert_raises_rpc_error, connect_nodes, disconnect_nodes, sync_blocks, wait_until
MIN_BLOCKS_TO_KEEP = 288
# Rescans start at the earliest block up to 2 hours before a key timestamp, so
@ -21,6 +23,47 @@ MIN_BLOCKS_TO_KEEP = 288
# compatible with pruning based on key creation time.
TIMESTAMP_WINDOW = 2 * 60 * 60
def mine_large_blocks(node, n):
# Make a large scriptPubKey for the coinbase transaction. This is OP_RETURN
# followed by 950k of OP_NOP. This would be non-standard in a non-coinbase
# transaction but is consensus valid.
# Get the block parameters for the first block
big_script = CScript([OP_RETURN] + [OP_NOP] * 950000)
best_block = node.getblock(node.getbestblockhash())
height = int(best_block["height"]) + 1
try:
# Static variable ensures that time is monotonicly increasing and is therefore
# different for each block created => blockhash is unique.
mine_large_blocks.nTime = min(mine_large_blocks.nTime, int(best_block["time"])) + 1
except AttributeError:
mine_large_blocks.nTime = int(best_block["time"]) + 1
previousblockhash = int(best_block["hash"], 16)
for _ in range(n):
# Build the coinbase transaction (with large scriptPubKey)
coinbase_tx = create_coinbase(height)
coinbase_tx.vin[0].nSequence = 2 ** 32 - 1
coinbase_tx.vout[0].scriptPubKey = big_script
coinbase_tx.rehash()
# Build the block
block = CBlock()
block.nVersion = best_block["version"]
block.hashPrevBlock = previousblockhash
block.nTime = mine_large_blocks.nTime
block.nBits = int('207fffff', 16)
block.nNonce = 0
block.vtx = [coinbase_tx]
block.hashMerkleRoot = block.calc_merkle_root()
block.solve()
# Submit to the node
node.submitblock(ToHex(block))
previousblockhash = block.sha256
height += 1
mine_large_blocks.nTime += 1
def calc_usage(blockdir):
return sum(os.path.getsize(blockdir + f) for f in os.listdir(blockdir) if os.path.isfile(os.path.join(blockdir, f))) / (1024. * 1024.)
@ -29,11 +72,10 @@ class PruneTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 6
self.rpc_timeout = 900
# Create nodes 0 and 1 to mine.
# Create node 2 to test pruning.
self.full_node_default_args = ["-maxreceivebuffer=20000", "-checkblocks=5", "-limitdescendantcount=100", "-limitdescendantsize=5000", "-limitancestorcount=100", "-limitancestorsize=5000"]
self.full_node_default_args = ["-maxreceivebuffer=20000", "-checkblocks=5"]
# Create nodes 3 and 4 to test manual pruning (they will be re-started with manual pruning later)
# Create nodes 5 to test wallet in prune mode, but do not connect
self.extra_args = [
@ -73,8 +115,7 @@ class PruneTest(BitcoinTestFramework):
self.nodes[0].generate(150)
# Then mine enough full blocks to create more than 550MiB of data
for i in range(645):
mine_large_block(self.nodes[0], self.utxo_cache_0)
mine_large_blocks(self.nodes[0], 645)
sync_blocks(self.nodes[0:5])
@ -84,8 +125,7 @@ class PruneTest(BitcoinTestFramework):
self.log.info("Though we're already using more than 550MiB, current usage: %d" % calc_usage(self.prunedir))
self.log.info("Mining 25 more blocks should cause the first block file to be pruned")
# Pruning doesn't run until we're allocating another chunk, 20 full blocks past the height cutoff will ensure this
for i in range(25):
mine_large_block(self.nodes[0], self.utxo_cache_0)
mine_large_blocks(self.nodes[0], 25)
# Wait for blk00000.dat to be pruned
wait_until(lambda: not os.path.isfile(os.path.join(self.prunedir, "blk00000.dat")), timeout=30)
@ -102,22 +142,13 @@ class PruneTest(BitcoinTestFramework):
for j in range(12):
# Disconnect node 0 so it can mine a longer reorg chain without knowing about node 1's soon-to-be-stale chain
# Node 2 stays connected, so it hears about the stale blocks and then reorg's when node0 reconnects
# Stopping node 0 also clears its mempool, so it doesn't have node1's transactions to accidentally mine
self.stop_node(0)
self.start_node(0, extra_args=self.full_node_default_args)
disconnect_nodes(self.nodes[0], 1)
disconnect_nodes(self.nodes[0], 2)
# Mine 24 blocks in node 1
for i in range(24):
if j == 0:
mine_large_block(self.nodes[1], self.utxo_cache_1)
else:
# Add node1's wallet transactions back to the mempool, to
# avoid the mined blocks from being too small.
self.nodes[1].resendwallettransactions()
self.nodes[1].generate(1) #tx's already in mempool from previous disconnects
mine_large_blocks(self.nodes[1], 24)
# Reorg back with 25 block chain from node 0
for i in range(25):
mine_large_block(self.nodes[0], self.utxo_cache_0)
mine_large_blocks(self.nodes[0], 25)
# Create connections in the order so both nodes can see the reorg at the same time
connect_nodes(self.nodes[0], 1)
@ -129,10 +160,6 @@ class PruneTest(BitcoinTestFramework):
def reorg_test(self):
# Node 1 will mine a 300 block chain starting 287 blocks back from Node 0 and Node 2's tip
# This will cause Node 2 to do a reorg requiring 288 blocks of undo data to the reorg_test chain
# Reboot node 1 to clear its mempool (hopefully make the invalidate faster)
# Lower the block max size so we don't keep mining all our big mempool transactions (from disconnected blocks)
self.stop_node(1)
self.start_node(1, extra_args=["-maxreceivebuffer=20000","-blockmaxweight=20000", "-checkblocks=5"])
height = self.nodes[1].getblockcount()
self.log.info("Current block height: %d" % height)
@ -153,9 +180,9 @@ class PruneTest(BitcoinTestFramework):
assert self.nodes[1].getblockcount() == self.forkheight - 1
self.log.info("New best height: %d" % self.nodes[1].getblockcount())
# Reboot node1 to clear those giant tx's from mempool
self.stop_node(1)
self.start_node(1, extra_args=["-maxreceivebuffer=20000","-blockmaxweight=20000", "-checkblocks=5"])
# Disconnect node1 and generate the new chain
disconnect_nodes(self.nodes[0], 1)
disconnect_nodes(self.nodes[1], 2)
self.log.info("Generating new longer chain of 300 more blocks")
self.nodes[1].generate(300)
@ -167,17 +194,10 @@ class PruneTest(BitcoinTestFramework):
self.log.info("Verify height on node 2: %d" % self.nodes[2].getblockcount())
self.log.info("Usage possibly still high because of stale blocks in block files: %d" % calc_usage(self.prunedir))
self.log.info("Mine 220 more large blocks so we have requisite history")
# Get node0's wallet transactions back in its mempool, to avoid the
# mined blocks from being too small.
self.nodes[0].resendwallettransactions()
for i in range(22):
# This can be slow, so do this in multiple RPC calls to avoid
# RPC timeouts.
self.nodes[0].generate(10) #node 0 has many large tx's in its mempool from the disconnects
sync_blocks(self.nodes[0:3], timeout=300)
mine_large_blocks(self.nodes[0], 220)
usage = calc_usage(self.prunedir)
self.log.info("Usage should be below target: %d" % usage)
@ -331,16 +351,9 @@ class PruneTest(BitcoinTestFramework):
self.log.info("Success")
def run_test(self):
self.log.info("Warning! This test requires 4GB of disk space and takes over 30 mins (up to 2 hours)")
self.log.info("Warning! This test requires 4GB of disk space")
self.log.info("Mining a big blockchain of 995 blocks")
# Determine default relay fee
self.relayfee = self.nodes[0].getnetworkinfo()["relayfee"]
# Cache for utxos, as the listunspent may take a long time later in the test
self.utxo_cache_0 = []
self.utxo_cache_1 = []
self.create_big_chain()
# Chain diagram key:
# * blocks on main chain