ClickHouse/tests/integration/test_extreme_deduplication/test.py

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import time
from contextlib import contextmanager
import pytest
from helpers.cluster import ClickHouseCluster
from helpers.network import PartitionManager
from helpers.test_tools import TSV
from helpers.client import CommandRequest
from helpers.client import QueryTimeoutExceedException
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cluster = ClickHouseCluster(__file__)
node1 = cluster.add_instance('node1', config_dir='configs', with_zookeeper=True, macros={"layer": 0, "shard": 0, "replica": 1})
node2 = cluster.add_instance('node2', config_dir='configs', with_zookeeper=True, macros={"layer": 0, "shard": 0, "replica": 2})
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nodes = [node1, node2]
@pytest.fixture(scope="module")
def started_cluster():
try:
cluster.start()
yield cluster
finally:
pass
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cluster.shutdown()
def test_deduplication_window_in_seconds(started_cluster):
node = node1
node1.query("""
CREATE TABLE simple ON CLUSTER test_cluster (date Date, id UInt32)
ENGINE = ReplicatedMergeTree('/clickhouse/tables/{shard}/simple', '{replica}', date, id, 8192)""")
node.query("INSERT INTO simple VALUES (0, 0)")
time.sleep(1)
node.query("INSERT INTO simple VALUES (0, 0)") # deduplication works here
node.query("INSERT INTO simple VALUES (0, 1)")
assert TSV(node.query("SELECT count() FROM simple")) == TSV("2\n")
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# wait clean thread
time.sleep(2)
assert TSV.toMat(node.query("SELECT count() FROM system.zookeeper WHERE path='/clickhouse/tables/0/simple/blocks'"))[0][0] == "1"
node.query("INSERT INTO simple VALUES (0, 0)") # deduplication doesn't works here, the first hash node was deleted
assert TSV.toMat(node.query("SELECT count() FROM simple"))[0][0] == "3"
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node1.query("""DROP TABLE simple ON CLUSTER test_cluster""")
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# Currently this test just reproduce incorrect behavior that sould be fixed
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@pytest.mark.skip(reason="Flapping test")
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def test_deduplication_works_in_case_of_intensive_inserts(started_cluster):
inserters = []
fetchers = []
node1.query("""
CREATE TABLE simple ON CLUSTER test_cluster (date Date, id UInt32)
ENGINE = ReplicatedMergeTree('/clickhouse/tables/{shard}/simple', '{replica}', date, id, 8192)""")
node1.query("INSERT INTO simple VALUES (0, 0)")
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for node in nodes:
host = node.ip_address
inserters.append(CommandRequest(['/bin/bash'], timeout=10, stdin="""
set -e
for i in `seq 1000`; do
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{} --host {} -q "INSERT INTO simple VALUES (0, 0)"
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done
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""".format(cluster.get_client_cmd(), host)))
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fetchers.append(CommandRequest(['/bin/bash'], timeout=10, stdin="""
set -e
for i in `seq 1000`; do
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res=`{} --host {} -q "SELECT count() FROM simple"`
if [[ $? -ne 0 || $res -ne 1 ]]; then
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echo "Selected $res elements! Host: {}" 1>&2
exit -1
fi;
done
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""".format(cluster.get_client_cmd(), host, node.name)))
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# There were not errors during INSERTs
for inserter in inserters:
try:
inserter.get_answer()
except QueryTimeoutExceedException:
# Only timeout is accepted
pass
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# There were not errors during SELECTs
for fetcher in fetchers:
try:
fetcher.get_answer()
except QueryTimeoutExceedException:
# Only timeout is accepted
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pass
node1.query("""DROP TABLE simple ON CLUSTER test_cluster""")