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83 lines
2.2 KiB
Python
83 lines
2.2 KiB
Python
import time
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import pytest
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from helpers.cluster import ClickHouseCluster
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from helpers.test_tools import assert_eq_with_retry
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cluster = ClickHouseCluster(__file__)
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node1 = cluster.add_instance("node1", with_zookeeper=True)
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node2 = cluster.add_instance("node2", with_zookeeper=True)
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@pytest.fixture(scope="module")
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def started_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 test_replica_always_download(started_cluster):
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node1.query_with_retry(
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"""
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CREATE TABLE IF NOT EXISTS test_table(
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key UInt64,
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value String
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) ENGINE = ReplicatedMergeTree('/clickhouse/tables/test_table/replicated', '1')
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ORDER BY tuple()
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"""
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)
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node2.query_with_retry(
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"""
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CREATE TABLE IF NOT EXISTS test_table(
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key UInt64,
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value String
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) ENGINE = ReplicatedMergeTree('/clickhouse/tables/test_table/replicated', '2')
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ORDER BY tuple()
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SETTINGS always_fetch_merged_part=1
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"""
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)
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# Stop merges on single node
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node1.query("SYSTEM STOP MERGES")
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for i in range(0, 10):
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node1.query_with_retry("INSERT INTO test_table VALUES ({}, '{}')".format(i, i))
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assert node1.query("SELECT COUNT() FROM test_table") == "10\n"
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assert_eq_with_retry(node2, "SELECT COUNT() FROM test_table", "10\n")
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time.sleep(5)
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# Nothing is merged
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assert (
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node1.query(
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"SELECT COUNT() FROM system.parts WHERE table = 'test_table' and active=1"
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)
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== "10\n"
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)
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assert (
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node2.query(
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"SELECT COUNT() FROM system.parts WHERE table = 'test_table' and active=1"
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)
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== "10\n"
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)
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node1.query("SYSTEM START MERGES")
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node1.query("OPTIMIZE TABLE test_table")
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node2.query("SYSTEM SYNC REPLICA test_table")
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node1_parts = node1.query(
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"SELECT COUNT() FROM system.parts WHERE table = 'test_table' and active=1"
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).strip()
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node2_parts = node2.query(
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"SELECT COUNT() FROM system.parts WHERE table = 'test_table' and active=1"
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).strip()
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assert int(node1_parts) < 10
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assert int(node2_parts) < 10
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