ClickHouse/tests/integration/test_log_family_hdfs/test.py

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import logging
import sys
import pytest
from helpers.cluster import ClickHouseCluster
from pyhdfs import HdfsClient
@pytest.fixture(scope="module")
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def started_cluster():
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try:
cluster = ClickHouseCluster(__file__)
cluster.add_instance(
"node", main_configs=["configs/storage_conf.xml"], with_hdfs=True
)
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logging.info("Starting cluster...")
cluster.start()
logging.info("Cluster started")
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fs = HdfsClient(hosts=cluster.hdfs_ip)
fs.mkdirs("/clickhouse")
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yield cluster
finally:
cluster.shutdown()
def assert_objects_count(started_cluster, objects_count, path="data/"):
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fs = HdfsClient(hosts=started_cluster.hdfs_ip)
hdfs_objects = fs.listdir("/clickhouse")
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assert objects_count == len(hdfs_objects)
# TinyLog: files: id.bin, sizes.json
# INSERT overwrites 1 file (`sizes.json`) and appends 1 file (`id.bin`), so
# files_overhead=1, files_overhead_per_insert=1
#
# Log: files: id.bin, __marks.mrk, sizes.json
# INSERT overwrites 1 file (`sizes.json`), and appends 2 files (`id.bin`, `__marks.mrk`), so
# files_overhead=1, files_overhead_per_insert=2
#
# StripeLog: files: data.bin, index.mrk, sizes.json
# INSERT overwrites 1 file (`sizes.json`), and appends 2 files (`index.mrk`, `data.bin`), so
# files_overhead=1, files_overhead_per_insert=2
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@pytest.mark.parametrize(
"log_engine,files_overhead,files_overhead_per_insert",
[("TinyLog", 1, 1), ("Log", 1, 2), ("StripeLog", 1, 2)],
)
def test_log_family_hdfs(
started_cluster, log_engine, files_overhead, files_overhead_per_insert
):
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node = started_cluster.instances["node"]
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node.query(
"CREATE TABLE hdfs_test (id UInt64) ENGINE={} SETTINGS disk = 'hdfs'".format(
log_engine
)
)
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node.query("INSERT INTO hdfs_test SELECT number FROM numbers(5)")
assert node.query("SELECT * FROM hdfs_test") == "0\n1\n2\n3\n4\n"
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assert_objects_count(started_cluster, files_overhead_per_insert + files_overhead)
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node.query("INSERT INTO hdfs_test SELECT number + 5 FROM numbers(3)")
assert (
node.query("SELECT * FROM hdfs_test order by id") == "0\n1\n2\n3\n4\n5\n6\n7\n"
)
assert_objects_count(
started_cluster, files_overhead_per_insert * 2 + files_overhead
)
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node.query("INSERT INTO hdfs_test SELECT number + 8 FROM numbers(1)")
assert (
node.query("SELECT * FROM hdfs_test order by id")
== "0\n1\n2\n3\n4\n5\n6\n7\n8\n"
)
assert_objects_count(
started_cluster, files_overhead_per_insert * 3 + files_overhead
)
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node.query("TRUNCATE TABLE hdfs_test")
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assert_objects_count(started_cluster, 0)
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node.query("DROP TABLE hdfs_test")