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103 lines
3.4 KiB
Python
103 lines
3.4 KiB
Python
import logging
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import pytest
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from helpers.cluster import ClickHouseCluster
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@pytest.fixture(scope="module")
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def cluster():
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try:
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cluster = ClickHouseCluster(__file__)
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cluster.add_instance("node", main_configs=["configs/config.d/storage_conf.xml", "configs/config.d/ssl_conf.xml",
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"configs/config.d/query_log.xml"],
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user_configs=["configs/config.d/users.xml"], with_minio=True)
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logging.info("Starting cluster...")
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cluster.start()
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logging.info("Cluster started")
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yield cluster
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finally:
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cluster.shutdown()
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def get_query_stat(instance, hint):
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result = {}
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instance.query("SYSTEM FLUSH LOGS")
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events = instance.query('''
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SELECT ProfileEvents.keys, ProfileEvents.values
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FROM system.query_log
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ARRAY JOIN ProfileEvents
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WHERE type != 1 AND query LIKE '%{}%'
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'''.format(hint.replace("'", "\\'"))).split("\n")
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for event in events:
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ev = event.split("\t")
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if len(ev) == 2:
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if ev[0].startswith("S3"):
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result[ev[0]] = int(ev[1])
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return result
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@pytest.mark.parametrize("min_rows_for_wide_part,read_requests", [(0, 2), (8192, 1)])
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def test_write_is_cached(cluster, min_rows_for_wide_part, read_requests):
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node = cluster.instances["node"]
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node.query(
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"""
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CREATE TABLE s3_test (
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id Int64,
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data String
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) ENGINE=MergeTree()
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ORDER BY id
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SETTINGS storage_policy='s3', min_rows_for_wide_part={}
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""".format(min_rows_for_wide_part)
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)
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node.query("SYSTEM FLUSH LOGS")
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node.query("TRUNCATE TABLE system.query_log")
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node.query("INSERT INTO s3_test VALUES (0,'data'),(1,'data')")
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select_query = "SELECT * FROM s3_test order by id FORMAT Values"
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assert node.query(select_query) == "(0,'data'),(1,'data')"
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stat = get_query_stat(node, select_query)
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assert stat["S3ReadRequestsCount"] == read_requests # Only .bin files should be accessed from S3.
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node.query("DROP TABLE IF EXISTS s3_test NO DELAY")
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@pytest.mark.parametrize("min_rows_for_wide_part,all_files,bin_files", [(0, 4, 2), (8192, 2, 1)])
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def test_read_after_cache_is_wiped(cluster, min_rows_for_wide_part, all_files, bin_files):
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node = cluster.instances["node"]
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node.query(
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"""
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CREATE TABLE s3_test (
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id Int64,
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data String
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) ENGINE=MergeTree()
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ORDER BY id
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SETTINGS storage_policy='s3', min_rows_for_wide_part={}
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""".format(min_rows_for_wide_part)
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)
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node.query("SYSTEM FLUSH LOGS")
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node.query("TRUNCATE TABLE system.query_log")
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node.query("INSERT INTO s3_test VALUES (0,'data'),(1,'data')")
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# Wipe cache
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cluster.exec_in_container(cluster.get_container_id("node"), ["rm", "-rf", "/var/lib/clickhouse/disks/s3/cache/"])
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select_query = "SELECT * FROM s3_test"
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node.query(select_query)
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stat = get_query_stat(node, select_query)
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assert stat["S3ReadRequestsCount"] == all_files # .mrk and .bin files should be accessed from S3.
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# After cache is populated again, only .bin files should be accessed from S3.
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select_query = "SELECT * FROM s3_test order by id FORMAT Values"
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assert node.query(select_query) == "(0,'data'),(1,'data')"
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stat = get_query_stat(node, select_query)
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assert stat["S3ReadRequestsCount"] == bin_files
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node.query("DROP TABLE IF EXISTS s3_test NO DELAY")
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