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218 lines
8.4 KiB
Python
218 lines
8.4 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.network import PartitionManager
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from helpers.test_tools import TSV
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cluster = ClickHouseCluster(__file__)
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instance_test_reconnect = cluster.add_instance('instance_test_reconnect', main_configs=['configs/remote_servers.xml'])
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instance_test_inserts_batching = cluster.add_instance(
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'instance_test_inserts_batching',
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main_configs=['configs/remote_servers.xml'], user_configs=['configs/enable_distributed_inserts_batching.xml'])
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remote = cluster.add_instance('remote', user_configs=['configs/forbid_background_merges.xml'])
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instance_test_inserts_local_cluster = cluster.add_instance(
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'instance_test_inserts_local_cluster',
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main_configs=['configs/remote_servers.xml'])
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node1 = cluster.add_instance('node1', main_configs=['configs/remote_servers.xml'], with_zookeeper=True)
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node2 = cluster.add_instance('node2', main_configs=['configs/remote_servers.xml'], with_zookeeper=True)
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shard1 = cluster.add_instance('shard1', main_configs=['configs/remote_servers.xml'], with_zookeeper=True)
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shard2 = cluster.add_instance('shard2', main_configs=['configs/remote_servers.xml'], 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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remote.query("CREATE TABLE local1 (x UInt32) ENGINE = Log")
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instance_test_reconnect.query('''
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CREATE TABLE distributed (x UInt32) ENGINE = Distributed('test_cluster', 'default', 'local1')
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''')
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remote.query("CREATE TABLE local2 (d Date, x UInt32, s String) ENGINE = MergeTree(d, x, 8192)")
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instance_test_inserts_batching.query('''
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CREATE TABLE distributed (d Date, x UInt32) ENGINE = Distributed('test_cluster', 'default', 'local2')
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''')
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instance_test_inserts_local_cluster.query("CREATE TABLE local (d Date, x UInt32) ENGINE = MergeTree(d, x, 8192)")
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instance_test_inserts_local_cluster.query('''
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CREATE TABLE distributed_on_local (d Date, x UInt32) ENGINE = Distributed('test_local_cluster', 'default', 'local')
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''')
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node1.query('''
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CREATE TABLE replicated(date Date, id UInt32) ENGINE = ReplicatedMergeTree('/clickhouse/tables/0/replicated', 'node1', date, id, 8192)
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''')
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node2.query('''
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CREATE TABLE replicated(date Date, id UInt32) ENGINE = ReplicatedMergeTree('/clickhouse/tables/0/replicated', 'node2', date, id, 8192)
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''')
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node1.query('''
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CREATE TABLE distributed (date Date, id UInt32) ENGINE = Distributed('shard_with_local_replica', 'default', 'replicated')
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''')
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node2.query('''
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CREATE TABLE distributed (date Date, id UInt32) ENGINE = Distributed('shard_with_local_replica', 'default', 'replicated')
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''')
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shard1.query('''
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CREATE TABLE low_cardinality (d Date, x UInt32, s LowCardinality(String)) ENGINE = MergeTree(d, x, 8192)''')
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shard2.query('''
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CREATE TABLE low_cardinality (d Date, x UInt32, s LowCardinality(String)) ENGINE = MergeTree(d, x, 8192)''')
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shard1.query('''
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CREATE TABLE low_cardinality_all (d Date, x UInt32, s LowCardinality(String)) ENGINE = Distributed('shard_with_low_cardinality', 'default', 'low_cardinality', sipHash64(s))''')
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node1.query('''
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CREATE TABLE table_function (n UInt8, s String) ENGINE = MergeTree() ORDER BY n''')
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node2.query('''
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CREATE TABLE table_function (n UInt8, s String) ENGINE = MergeTree() ORDER BY n''')
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yield cluster
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finally:
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cluster.shutdown()
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def test_reconnect(started_cluster):
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instance = instance_test_reconnect
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with PartitionManager() as pm:
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# Open a connection for insertion.
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instance.query("INSERT INTO distributed VALUES (1)")
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time.sleep(1)
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assert remote.query("SELECT count(*) FROM local1").strip() == '1'
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# Now break the connection.
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pm.partition_instances(instance, remote, action='REJECT --reject-with tcp-reset')
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instance.query("INSERT INTO distributed VALUES (2)")
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time.sleep(1)
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# Heal the partition and insert more data.
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# The connection must be reestablished and after some time all data must be inserted.
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pm.heal_all()
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time.sleep(1)
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instance.query("INSERT INTO distributed VALUES (3)")
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time.sleep(1)
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assert remote.query("SELECT count(*) FROM local1").strip() == '3'
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def test_inserts_batching(started_cluster):
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instance = instance_test_inserts_batching
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with PartitionManager() as pm:
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pm.partition_instances(instance, remote)
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instance.query("INSERT INTO distributed(d, x) VALUES ('2000-01-01', 1)")
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# Sleep a bit so that this INSERT forms a batch of its own.
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time.sleep(0.1)
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instance.query("INSERT INTO distributed(x, d) VALUES (2, '2000-01-01')")
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for i in range(3, 7):
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instance.query("INSERT INTO distributed(d, x) VALUES ('2000-01-01', {})".format(i))
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for i in range(7, 9):
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instance.query("INSERT INTO distributed(x, d) VALUES ({}, '2000-01-01')".format(i))
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instance.query("INSERT INTO distributed(d, x) VALUES ('2000-01-01', 9)")
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# After ALTER the structure of the saved blocks will be different
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instance.query("ALTER TABLE distributed ADD COLUMN s String")
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for i in range(10, 13):
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instance.query("INSERT INTO distributed(d, x) VALUES ('2000-01-01', {})".format(i))
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instance.query("SYSTEM FLUSH DISTRIBUTED distributed")
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time.sleep(1.0)
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result = remote.query("SELECT _part, groupArray(x) FROM local2 GROUP BY _part ORDER BY _part")
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# Explanation: as merges are turned off on remote instance, active parts in local2 table correspond 1-to-1
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# to inserted blocks.
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# Batches of max 3 rows are formed as min_insert_block_size_rows = 3.
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# Blocks:
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# 1. Failed batch that is retried with the same contents.
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# 2. Full batch of inserts before ALTER.
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# 3. Full batch of inserts before ALTER.
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# 4. Full batch of inserts after ALTER (that have different block structure).
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# 5. What was left to insert with the column structure before ALTER.
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expected = '''\
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20000101_20000101_1_1_0\t[1]
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20000101_20000101_2_2_0\t[2,3,4]
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20000101_20000101_3_3_0\t[5,6,7]
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20000101_20000101_4_4_0\t[10,11,12]
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20000101_20000101_5_5_0\t[8,9]
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'''
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assert TSV(result) == TSV(expected)
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def test_inserts_local(started_cluster):
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instance = instance_test_inserts_local_cluster
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instance.query("INSERT INTO distributed_on_local VALUES ('2000-01-01', 1)")
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time.sleep(0.5)
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assert instance.query("SELECT count(*) FROM local").strip() == '1'
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def test_prefer_localhost_replica(started_cluster):
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test_query = "SELECT * FROM distributed ORDER BY id"
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node1.query("INSERT INTO distributed VALUES (toDate('2017-06-17'), 11)")
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node2.query("INSERT INTO distributed VALUES (toDate('2017-06-17'), 22)")
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time.sleep(1.0)
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expected_distributed = '''\
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2017-06-17\t11
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2017-06-17\t22
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'''
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expected_from_node2 = '''\
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2017-06-17\t11
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2017-06-17\t22
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2017-06-17\t44
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'''
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expected_from_node1 = '''\
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2017-06-17\t11
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2017-06-17\t22
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2017-06-17\t33
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'''
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assert TSV(node1.query(test_query)) == TSV(expected_distributed)
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assert TSV(node2.query(test_query)) == TSV(expected_distributed)
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# Make replicas inconsistent by disabling merges and fetches
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# for possibility of determining to which replica the query was send
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node1.query("SYSTEM STOP MERGES")
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node1.query("SYSTEM STOP FETCHES")
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node2.query("SYSTEM STOP MERGES")
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node2.query("SYSTEM STOP FETCHES")
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node1.query("INSERT INTO replicated VALUES (toDate('2017-06-17'), 33)")
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node2.query("INSERT INTO replicated VALUES (toDate('2017-06-17'), 44)")
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time.sleep(1.0)
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# Query is sent to node2, as it local and prefer_localhost_replica=1
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assert TSV(node2.query(test_query)) == TSV(expected_from_node2)
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# Now query is sent to node1, as it higher in order
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assert TSV(node2.query(test_query + " SETTINGS load_balancing='in_order', prefer_localhost_replica=0")) == TSV(expected_from_node1)
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def test_inserts_low_cardinality(started_cluster):
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instance = shard1
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instance.query("INSERT INTO low_cardinality_all (d,x,s) VALUES ('2018-11-12',1,'123')")
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time.sleep(0.5)
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assert instance.query("SELECT count(*) FROM low_cardinality_all").strip() == '1'
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def test_table_function(started_cluster):
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node1.query("insert into table function cluster('shard_with_local_replica', 'default', 'table_function') select number, concat('str_', toString(number)) from numbers(100000)")
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assert node1.query("select count() from cluster('shard_with_local_replica', 'default', 'table_function')").rstrip() == '100000'
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