ClickHouse/tests/integration/test_tmp_policy/test.py

# pylint: disable=unused-argument
# pylint: disable=redefined-outer-name

import pytest

from helpers.cluster import ClickHouseCluster

cluster = ClickHouseCluster(__file__)

node = cluster.add_instance(
    "node",
    main_configs=["configs/config.d/storage_configuration.xml"],
    tmpfs=["/disk1:size=100M", "/disk2:size=100M"],
)


@pytest.fixture(scope="module")
def start_cluster():
    try:
        cluster.start()
        yield cluster
    finally:
        cluster.shutdown()


def test_disk_selection(start_cluster):
    query = "SELECT count(ignore(*)) FROM (SELECT * FROM system.numbers LIMIT 1e7) GROUP BY number"
    settings = {
        "max_bytes_before_external_group_by": 1 << 20,
        "max_bytes_before_external_sort": 1 << 20,
    }

    assert node.contains_in_log("Setting up /disk1/ to store temporary data in it")
    assert node.contains_in_log("Setting up /disk2/ to store temporary data in it")

    node.query(query, settings=settings)
    assert node.contains_in_log(
        "Writing part of aggregation data into temporary file /disk1/"
    )
    assert node.contains_in_log(
        "Writing part of aggregation data into temporary file /disk2/"
    )