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64 lines
1.9 KiB
Python
64 lines
1.9 KiB
Python
import pytest
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import time
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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("""
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CREATE TABLE 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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node2.query("""
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CREATE TABLE 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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# 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("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(3)
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# Nothing is merged
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assert node1.query("SELECT COUNT() FROM system.parts WHERE table = 'test_table' and active=1") == "10\n"
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assert node2.query("SELECT COUNT() FROM system.parts WHERE table = 'test_table' and active=1") == "10\n"
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node1.query("SYSTEM START MERGES")
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time.sleep(3)
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node1_parts = node1.query("SELECT COUNT() FROM system.parts WHERE table = 'test_table' and active=1").strip()
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node2_parts = node2.query("SELECT COUNT() FROM system.parts WHERE table = 'test_table' and active=1").strip()
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assert int(node1_parts) < 10 # something merged
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assert int(node2_parts) < 10
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