mirror of
https://github.com/neondatabase/neon.git
synced 2026-01-07 21:42:56 +00:00
5bd8e2363a
This will help to keep us from using deprecated Python features going forward. Signed-off-by: Tristan Partin <tristan@neon.tech>
72 lines
2.3 KiB
Python
72 lines
2.3 KiB
Python
from __future__ import annotations
|
|
|
|
from fixtures.neon_fixtures import NeonEnvBuilder
|
|
|
|
|
|
# Test safekeeper sync and pageserver catch up
|
|
# while initial compute node is down and pageserver is lagging behind safekeepers.
|
|
# Ensure that basebackup after restart of all components is correct
|
|
# and new compute node contains all data.
|
|
def test_pageserver_catchup_while_compute_down(neon_env_builder: NeonEnvBuilder):
|
|
neon_env_builder.num_safekeepers = 3
|
|
env = neon_env_builder.init_start()
|
|
|
|
env.create_branch("test_pageserver_catchup_while_compute_down")
|
|
# Make shared_buffers large to ensure we won't query pageserver while it is down.
|
|
endpoint = env.endpoints.create_start(
|
|
"test_pageserver_catchup_while_compute_down", config_lines=["shared_buffers=512MB"]
|
|
)
|
|
|
|
pg_conn = endpoint.connect()
|
|
cur = pg_conn.cursor()
|
|
|
|
# Create table, and insert some rows.
|
|
cur.execute("CREATE TABLE foo (t text)")
|
|
cur.execute(
|
|
"""
|
|
INSERT INTO foo
|
|
SELECT 'long string to consume some space' || g
|
|
FROM generate_series(1, 10000) g
|
|
"""
|
|
)
|
|
|
|
cur.execute("SELECT count(*) FROM foo")
|
|
assert cur.fetchone() == (10000,)
|
|
|
|
# Stop and restart pageserver. This is a more or less graceful shutdown, although
|
|
# the page server doesn't currently have a shutdown routine so there's no difference
|
|
# between stopping and crashing.
|
|
env.pageserver.stop()
|
|
|
|
# insert some more rows
|
|
# since pageserver is shut down, these will be only on safekeepers
|
|
cur.execute(
|
|
"""
|
|
INSERT INTO foo
|
|
SELECT 'long string to consume some space' || g
|
|
FROM generate_series(1, 10000) g
|
|
"""
|
|
)
|
|
|
|
# stop safekeepers gracefully
|
|
env.safekeepers[0].stop()
|
|
env.safekeepers[1].stop()
|
|
env.safekeepers[2].stop()
|
|
|
|
# start everything again
|
|
# safekeepers must synchronize and pageserver must catch up
|
|
env.pageserver.start()
|
|
env.safekeepers[0].start()
|
|
env.safekeepers[1].start()
|
|
env.safekeepers[2].start()
|
|
|
|
# restart compute node
|
|
endpoint.stop_and_destroy().create_start("test_pageserver_catchup_while_compute_down")
|
|
|
|
# Ensure that basebackup went correct and pageserver returned all data
|
|
pg_conn = endpoint.connect()
|
|
cur = pg_conn.cursor()
|
|
|
|
cur.execute("SELECT count(*) FROM foo")
|
|
assert cur.fetchone() == (20000,)
|