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consistency_test.py
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consistency_test.py
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from dtest import Tester, debug, DISABLE_VNODES
from assertions import assert_unavailable, assert_none
from tools import (create_c1c2_table, insert_c1c2, query_c1c2, insert_columns)
from cassandra import ConsistencyLevel
from cassandra.query import SimpleStatement
class TestConsistency(Tester):
def cl_cl_prepare(self, write_cl, read_cl, tolerate_missing=False):
cluster = self.cluster
cluster.populate(3).start()
node1, node2, node3 = cluster.nodelist()
session = self.patient_cql_connection(node1)
self.create_ks(session, 'ks', 3)
create_c1c2_table(self, session)
session2 = self.patient_cql_connection(node2, 'ks')
# insert and get at CL.QUORUM
for n in xrange(0, 100):
insert_c1c2(session, n, write_cl)
query_c1c2(session2, n, read_cl, tolerate_missing)
return session, session2
def quorum_quorum_test(self):
session, session2 = self.cl_cl_prepare(ConsistencyLevel.QUORUM, ConsistencyLevel.QUORUM)
#Stop a node and retest
self.cluster.nodelist()[2].stop()
for n in xrange(0, 100):
insert_c1c2(session, n, ConsistencyLevel.QUORUM)
query_c1c2(session2, n, ConsistencyLevel.QUORUM)
self.cluster.nodelist()[1].stop()
assert_unavailable(insert_c1c2, session, 100, ConsistencyLevel.QUORUM)
def all_all_test(self):
session, session2 = self.cl_cl_prepare(ConsistencyLevel.ALL, ConsistencyLevel.ALL)
self.cluster.nodelist()[2].stop()
assert_unavailable(insert_c1c2, session, 100, ConsistencyLevel.ALL)
def one_one_test(self):
session, session2 = self.cl_cl_prepare(
ConsistencyLevel.ONE, ConsistencyLevel.ONE, tolerate_missing=True)
#Stop a node and retest
self.cluster.nodelist()[2].stop()
for n in xrange(0, 100):
insert_c1c2(session, n, ConsistencyLevel.ONE)
query_c1c2(session2, n, ConsistencyLevel.ONE, tolerate_missing=True)
#Stop a node and retest
self.cluster.nodelist()[1].stop()
for n in xrange(0, 100):
insert_c1c2(session, n, ConsistencyLevel.ONE)
query_c1c2(session2, n, ConsistencyLevel.ONE, tolerate_missing=False)
def one_all_test(self):
session, session2 = self.cl_cl_prepare(ConsistencyLevel.ONE, ConsistencyLevel.ALL)
#Stop a node and retest
self.cluster.nodelist()[2].stop()
for n in xrange(0, 100):
insert_c1c2(session, n, ConsistencyLevel.ONE)
assert_unavailable(query_c1c2, session2, 100, ConsistencyLevel.ALL)
#Stop a node and retest
self.cluster.nodelist()[1].stop()
for n in xrange(0, 100):
insert_c1c2(session, n, ConsistencyLevel.ONE)
assert_unavailable(query_c1c2, session2, 100, ConsistencyLevel.ALL)
def all_one_test(self):
session, session2 = self.cl_cl_prepare(ConsistencyLevel.ALL, ConsistencyLevel.ONE)
#Stop a node and retest
self.cluster.nodelist()[2].stop()
assert_unavailable(insert_c1c2, session, 100, ConsistencyLevel.ALL)
for n in xrange(0, 100):
query_c1c2(session2, n, ConsistencyLevel.ONE)
#Stop a node and retest
self.cluster.nodelist()[1].stop()
assert_unavailable(insert_c1c2, session, 100, ConsistencyLevel.ALL)
for n in xrange(0, 100):
query_c1c2(session2, n, ConsistencyLevel.ONE)
def quorum_two_test(self):
session, session2 = self.cl_cl_prepare(ConsistencyLevel.QUORUM, ConsistencyLevel.TWO)
#Stop a node and retest
self.cluster.nodelist()[2].stop()
for n in xrange(0, 100):
insert_c1c2(session, n, ConsistencyLevel.QUORUM)
query_c1c2(session2, n, ConsistencyLevel.TWO)
self.cluster.nodelist()[1].stop()
assert_unavailable(insert_c1c2, session, 100, ConsistencyLevel.QUORUM)
assert_unavailable(query_c1c2, session2, 100, ConsistencyLevel.TWO)
def quorum_three_test(self):
session, session2 = self.cl_cl_prepare(ConsistencyLevel.QUORUM, ConsistencyLevel.THREE)
#Stop a node and retest
self.cluster.nodelist()[2].stop()
for n in xrange(0, 100):
insert_c1c2(session, n, ConsistencyLevel.QUORUM)
assert_unavailable(query_c1c2, session2, 100, ConsistencyLevel.THREE)
self.cluster.nodelist()[1].stop()
assert_unavailable(insert_c1c2, session, 100, ConsistencyLevel.QUORUM)
assert_unavailable(query_c1c2, session2, 100, ConsistencyLevel.THREE)
def two_two_test(self):
session, session2 = self.cl_cl_prepare(ConsistencyLevel.TWO, ConsistencyLevel.TWO)
#Stop a node and retest
self.cluster.nodelist()[2].stop()
for n in xrange(0, 100):
insert_c1c2(session, n, ConsistencyLevel.TWO)
query_c1c2(session2, n, ConsistencyLevel.TWO)
self.cluster.nodelist()[1].stop()
assert_unavailable(insert_c1c2, session, 100, ConsistencyLevel.TWO)
assert_unavailable(query_c1c2, session2, 100, ConsistencyLevel.TWO)
def three_one_test(self):
session, session2 = self.cl_cl_prepare(ConsistencyLevel.THREE, ConsistencyLevel.ONE)
#Stop a node and retest
self.cluster.nodelist()[2].stop()
assert_unavailable(insert_c1c2, session, 100, ConsistencyLevel.THREE)
for n in xrange(0, 100):
query_c1c2(session2, n, ConsistencyLevel.ONE)
#Stop a node and retest
self.cluster.nodelist()[1].stop()
assert_unavailable(insert_c1c2, session, 100, ConsistencyLevel.THREE)
for n in xrange(0, 100):
query_c1c2(session2, n, ConsistencyLevel.ONE)
def short_read_test(self):
cluster = self.cluster
# Disable hinted handoff and set batch commit log so this doesn't
# interfer with the test
cluster.set_configuration_options(values={ 'hinted_handoff_enabled' : False}, batch_commitlog=True)
cluster.populate(3).start(wait_other_notice=True)
[node1, node2, node3] = cluster.nodelist()
cursor = self.patient_cql_connection(node1)
self.create_ks(cursor, 'ks', 3)
self.create_cf(cursor, 'cf', read_repair=0.0)
# insert 9 columns in one row
insert_columns(self, cursor, 0, 9)
# Deleting 3 first columns with a different node dead each time
self.stop_delete_and_restart(1, 0)
self.stop_delete_and_restart(2, 1)
self.stop_delete_and_restart(3, 2)
# Query 3 firsts columns
cursor = self.patient_cql_connection(node1, 'ks')
query = SimpleStatement('SELECT c, v FROM cf WHERE key=\'k0\' LIMIT 3', consistency_level=ConsistencyLevel.QUORUM)
rows = cursor.execute(query)
res = rows
assert len(res) == 3, 'Expecting 3 values, got %d (%s)' % (len(res), str(res))
# value 0, 1 and 2 have been deleted
for i in xrange(1, 4):
assert res[i-1][1] == 'value%d' % (i+2), 'Expecting value%d, got %s (%s)' % (i+2, res[i-1][1], str(res))
def short_read_delete_test(self):
""" Test short reads ultimately leaving no columns alive [#4000] """
cluster = self.cluster
# Disable hinted handoff and set batch commit log so this doesn't
# interfer with the test
cluster.set_configuration_options(values={ 'hinted_handoff_enabled' : False}, batch_commitlog=True)
cluster.populate(2).start(wait_other_notice=True)
[node1, node2] = cluster.nodelist()
cursor = self.patient_cql_connection(node1)
self.create_ks(cursor, 'ks', 3)
self.create_cf(cursor, 'cf', read_repair=0.0)
# insert 2 columns in one row
insert_columns(self, cursor, 0, 2)
# Delete the row while first node is dead
node1.flush()
node1.stop(wait_other_notice=True)
cursor = self.patient_cql_connection(node2, 'ks')
query = SimpleStatement('DELETE FROM cf WHERE key=\'k0\'', consistency_level=ConsistencyLevel.ONE)
cursor.execute(query)
node1.start(wait_other_notice=True)
# Query first column
cursor = self.patient_cql_connection(node1, 'ks')
query = SimpleStatement('SELECT c, v FROM cf WHERE key=\'k0\' LIMIT 1', consistency_level=ConsistencyLevel.QUORUM)
res = cursor.execute(query)
assert len(res) == 0, res
def short_read_quorum_delete_test(self):
"""Test CASSANDRA-8933"""
cluster = self.cluster
#Consider however 3 nodes A, B, C (RF=3), and following sequence of operations (all done at QUORUM):
# Disable hinted handoff and set batch commit log so this doesn't
# interfere with the test
cluster.set_configuration_options(values={ 'hinted_handoff_enabled' : False}, batch_commitlog=True)
cluster.populate(3).start(wait_other_notice=True)
node1, node2, node3 = cluster.nodelist()
session = self.patient_cql_connection(node1)
self.create_ks(session, 'ks', 3)
session.execute("CREATE TABLE t (id int, v int, PRIMARY KEY(id, v)) WITH read_repair_chance = 0.0")
# we write 1 and 2 in a partition: all nodes get it.
session.execute(SimpleStatement("INSERT INTO t (id, v) VALUES (0, 1)", consistency_level=ConsistencyLevel.ALL))
session.execute(SimpleStatement("INSERT INTO t (id, v) VALUES (0, 2)", consistency_level=ConsistencyLevel.ALL))
# we delete 1: only A and C get it.
node2.flush()
node2.stop(wait_other_notice=True)
session.execute(SimpleStatement("DELETE FROM t WHERE id = 0 AND v = 1", consistency_level=ConsistencyLevel.QUORUM))
node2.start(wait_other_notice=True)
# we delete 2: only B and C get it.
node1.flush()
node1.stop(wait_other_notice=True)
session.execute(SimpleStatement("DELETE FROM t WHERE id = 0 AND v = 2", consistency_level=ConsistencyLevel.QUORUM))
node1.start(wait_other_notice=True)
# we read the first row in the partition (so with a LIMIT 1) and A and B answer first.
node3.stop()
assert_none(session, "SELECT * FROM t WHERE id = 0 LIMIT 1", cl=ConsistencyLevel.QUORUM)
def hintedhandoff_test(self):
cluster = self.cluster
if DISABLE_VNODES:
cluster.populate(2).start()
else:
tokens = cluster.balanced_tokens(2)
cluster.populate(2, tokens=tokens).start()
[node1, node2] = cluster.nodelist()
cursor = self.patient_cql_connection(node1)
self.create_ks(cursor, 'ks', 2)
create_c1c2_table(self, cursor)
node2.stop(wait_other_notice=True)
for n in xrange(0, 100):
insert_c1c2(cursor, n, ConsistencyLevel.ONE)
log_mark = node1.mark_log()
node2.start()
node1.watch_log_for(["Finished hinted"], from_mark=log_mark, timeout=120)
node1.stop(wait_other_notice=True)
# Check node2 for all the keys that should have been delivered via HH
cursor = self.patient_cql_connection(node2, keyspace='ks')
for n in xrange(0, 100):
query_c1c2(cursor, n, ConsistencyLevel.ONE)
def readrepair_test(self):
cluster = self.cluster
cluster.set_configuration_options(values={ 'hinted_handoff_enabled' : False})
if DISABLE_VNODES:
cluster.populate(2).start()
else:
tokens = cluster.balanced_tokens(2)
cluster.populate(2, tokens=tokens).start()
[node1, node2] = cluster.nodelist()
cursor = self.patient_cql_connection(node1)
self.create_ks(cursor, 'ks', 2)
create_c1c2_table(self, cursor, read_repair=1.0)
node2.stop(wait_other_notice=True)
for n in xrange(0, 10000):
insert_c1c2(cursor, n, ConsistencyLevel.ONE)
node2.start(wait_other_notice=True)
# query everything to cause RR
for n in xrange(0, 10000):
query_c1c2(cursor, n, ConsistencyLevel.QUORUM)
node1.stop(wait_other_notice=True)
# Check node2 for all the keys that should have been repaired
cursor = self.patient_cql_connection(node2, keyspace='ks')
for n in xrange(0, 10000):
query_c1c2(cursor, n, ConsistencyLevel.ONE)
def short_read_reversed_test(self):
cluster = self.cluster
# Disable hinted handoff and set batch commit log so this doesn't
# interfer with the test
cluster.set_configuration_options(values={ 'hinted_handoff_enabled' : False}, batch_commitlog=True)
cluster.populate(3).start(wait_other_notice=True)
[node1, node2, node3] = cluster.nodelist()
cursor = self.patient_cql_connection(node1)
self.create_ks(cursor, 'ks', 3)
self.create_cf(cursor, 'cf', read_repair=0.0)
# insert 9 columns in one row
insert_columns(self, cursor, 0, 9)
# Deleting 3 last columns with a different node dead each time
self.stop_delete_and_restart(1, 6)
self.stop_delete_and_restart(2, 7)
self.stop_delete_and_restart(3, 8)
# Query 3 firsts columns
cursor = self.patient_cql_connection(node1, 'ks')
query = SimpleStatement('SELECT c, v FROM cf WHERE key=\'k0\' ORDER BY c DESC LIMIT 3', consistency_level=ConsistencyLevel.QUORUM)
rows = cursor.execute(query)
res = rows
assert len(res) == 3, 'Expecting 3 values, got %d (%s)' % (len(res), str(res))
# value 6, 7 and 8 have been deleted
for i in xrange(0, 3):
assert res[i][1] == 'value%d' % (5-i), 'Expecting value%d, got %s (%s)' % (5-i, res[i][1], str(res))
def quorum_available_during_failure_test(self):
CL = ConsistencyLevel.QUORUM
RF = 3
debug("Creating a ring")
cluster = self.cluster
if DISABLE_VNODES:
cluster.populate(3).start()
else:
tokens = cluster.balanced_tokens(3)
cluster.populate(3, tokens=tokens).start()
[node1, node2, node3] = cluster.nodelist()
cluster.start()
debug("Set to talk to node 2")
cursor = self.patient_cql_connection(node2)
self.create_ks(cursor, 'ks', RF)
create_c1c2_table(self, cursor)
debug("Generating some data")
for n in xrange(100):
insert_c1c2(cursor, n, CL)
debug("Taking down node1")
node1.stop(wait_other_notice=True)
debug("Reading back data.")
for n in xrange(100):
query_c1c2(cursor, n, CL)
def stop_delete_and_restart(self, node_number, column):
to_stop = self.cluster.nodes["node%d" % node_number]
next_node = self.cluster.nodes["node%d" % (((node_number + 1) % 3) + 1)]
to_stop.flush()
to_stop.stop(wait_other_notice=True)
cursor = self.patient_cql_connection(next_node, 'ks')
query = 'BEGIN BATCH '
query = query + 'DELETE FROM cf WHERE key=\'k0\' AND c=\'c%06d\'; ' % column
query = query + 'DELETE FROM cf WHERE key=\'k0\' AND c=\'c2\'; '
query = query + 'APPLY BATCH;'
simple_query = SimpleStatement(query, consistency_level=ConsistencyLevel.QUORUM)
cursor.execute(simple_query)
to_stop.start(wait_other_notice=True)