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159 lines
6.2 KiB
Python
159 lines
6.2 KiB
Python
import pytest
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from helpers.cluster import ClickHouseCluster
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cluster = ClickHouseCluster(__file__)
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nodes = [
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cluster.add_instance(
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f"n{i}", main_configs=["configs/remote_servers.xml"], with_zookeeper=True
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)
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for i in (1, 2, 3, 4, 5, 6)
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]
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@pytest.fixture(scope="module", autouse=True)
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def start_cluster():
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try:
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cluster.start()
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yield cluster
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finally:
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cluster.shutdown()
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def create_tables(cluster, table_name):
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# create replicated tables
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for node in nodes:
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node.query(f"DROP TABLE IF EXISTS {table_name} SYNC")
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if cluster == "test_single_shard_multiple_replicas":
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nodes[0].query(
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f"CREATE TABLE IF NOT EXISTS {table_name} (key Int64, value String) Engine=ReplicatedMergeTree('/test_parallel_replicas/shard1/{table_name}', 'r1') ORDER BY (key)"
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)
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nodes[1].query(
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f"CREATE TABLE IF NOT EXISTS {table_name} (key Int64, value String) Engine=ReplicatedMergeTree('/test_parallel_replicas/shard1/{table_name}', 'r2') ORDER BY (key)"
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)
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nodes[2].query(
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f"CREATE TABLE IF NOT EXISTS {table_name} (key Int64, value String) Engine=ReplicatedMergeTree('/test_parallel_replicas/shard1/{table_name}', 'r3') ORDER BY (key)"
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)
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nodes[3].query(
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f"CREATE TABLE IF NOT EXISTS {table_name} (key Int64, value String) Engine=ReplicatedMergeTree('/test_parallel_replicas/shard1/{table_name}', 'r4') ORDER BY (key)"
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)
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elif cluster == "test_multiple_shards_multiple_replicas":
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# shard 1
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nodes[0].query(
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f"CREATE TABLE IF NOT EXISTS {table_name} (key Int64, value String) Engine=ReplicatedMergeTree('/test_parallel_replicas/shard1/{table_name}', 'r1') ORDER BY (key)"
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)
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nodes[1].query(
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f"CREATE TABLE IF NOT EXISTS {table_name} (key Int64, value String) Engine=ReplicatedMergeTree('/test_parallel_replicas/shard1/{table_name}', 'r2') ORDER BY (key)"
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)
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nodes[2].query(
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f"CREATE TABLE IF NOT EXISTS {table_name} (key Int64, value String) Engine=ReplicatedMergeTree('/test_parallel_replicas/shard1/{table_name}', 'r3') ORDER BY (key)"
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)
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# shard 2
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nodes[3].query(
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f"CREATE TABLE IF NOT EXISTS {table_name} (key Int64, value String) Engine=ReplicatedMergeTree('/test_parallel_replicas/shard2/{table_name}', 'r1') ORDER BY (key)"
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)
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nodes[4].query(
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f"CREATE TABLE IF NOT EXISTS {table_name} (key Int64, value String) Engine=ReplicatedMergeTree('/test_parallel_replicas/shard2/{table_name}', 'r2') ORDER BY (key)"
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)
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nodes[5].query(
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f"CREATE TABLE IF NOT EXISTS {table_name} (key Int64, value String) Engine=ReplicatedMergeTree('/test_parallel_replicas/shard2/{table_name}', 'r3') ORDER BY (key)"
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)
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else:
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raise Exception(f"Unexpected cluster: {cluster}")
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# create distributed table
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nodes[0].query(f"DROP TABLE IF EXISTS {table_name}_d SYNC")
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nodes[0].query(
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f"""
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CREATE TABLE {table_name}_d AS {table_name}
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Engine=Distributed(
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{cluster},
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currentDatabase(),
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{table_name},
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key
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)
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"""
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)
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# populate data
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nodes[0].query(
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f"INSERT INTO {table_name}_d SELECT number, number FROM numbers(1000)",
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settings={"distributed_foreground_insert": 1},
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)
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nodes[0].query(
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f"INSERT INTO {table_name}_d SELECT number, number FROM numbers(2000)",
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settings={"distributed_foreground_insert": 1},
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)
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nodes[0].query(
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f"INSERT INTO {table_name}_d SELECT -number, -number FROM numbers(1000)",
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settings={"distributed_foreground_insert": 1},
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)
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nodes[0].query(
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f"INSERT INTO {table_name}_d SELECT -number, -number FROM numbers(2000)",
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settings={"distributed_foreground_insert": 1},
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)
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nodes[0].query(
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f"INSERT INTO {table_name}_d SELECT number, number FROM numbers(3)",
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settings={"distributed_foreground_insert": 1},
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)
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@pytest.mark.parametrize(
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"cluster,max_parallel_replicas,prefer_localhost_replica",
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[
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pytest.param("test_single_shard_multiple_replicas", 2, 0),
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pytest.param("test_single_shard_multiple_replicas", 3, 0),
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pytest.param("test_single_shard_multiple_replicas", 4, 0),
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pytest.param("test_single_shard_multiple_replicas", 10, 0),
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pytest.param("test_single_shard_multiple_replicas", 2, 1),
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pytest.param("test_single_shard_multiple_replicas", 3, 1),
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pytest.param("test_single_shard_multiple_replicas", 4, 1),
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pytest.param("test_single_shard_multiple_replicas", 10, 1),
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pytest.param("test_multiple_shards_multiple_replicas", 2, 0),
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pytest.param("test_multiple_shards_multiple_replicas", 3, 0),
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pytest.param("test_multiple_shards_multiple_replicas", 4, 0),
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pytest.param("test_multiple_shards_multiple_replicas", 10, 0),
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pytest.param("test_multiple_shards_multiple_replicas", 2, 1),
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pytest.param("test_multiple_shards_multiple_replicas", 3, 1),
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pytest.param("test_multiple_shards_multiple_replicas", 4, 1),
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pytest.param("test_multiple_shards_multiple_replicas", 10, 1),
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],
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)
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def test_parallel_replicas_over_distributed(
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start_cluster, cluster, max_parallel_replicas, prefer_localhost_replica
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):
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table_name = "test_table"
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create_tables(cluster, table_name)
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node = nodes[0]
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expected_result = f"6003\t-1999\t1999\t3\n"
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# sync all replicas to get consistent result
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node.query(f"SYSTEM SYNC REPLICA ON CLUSTER {cluster} {table_name}")
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# parallel replicas
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assert (
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node.query(
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f"SELECT count(), min(key), max(key), sum(key) FROM {table_name}_d",
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settings={
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"enable_parallel_replicas": 2,
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"prefer_localhost_replica": prefer_localhost_replica,
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"max_parallel_replicas": max_parallel_replicas,
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},
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)
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== expected_result
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)
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# w/o parallel replicas
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assert (
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node.query(
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f"SELECT count(), min(key), max(key), sum(key) FROM {table_name}_d",
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settings={
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"enable_parallel_replicas": 0,
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},
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)
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== expected_result
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)
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