class testConcurrentQueryFlow(FlowTestsBase):
def __init__(self):
# skip test if we're running under Valgrind
if Env().envRunner.debugger is not None:
Env().skip(
) # valgrind is not working correctly with multi processing
self.env = Env(decodeResponses=True)
global graphs
graphs = []
for i in range(0, CLIENT_COUNT):
redis_con = self.env.getConnection()
graphs.append(Graph(GRAPH_ID, redis_con))
self.populate_graph()
def populate_graph(self):
nodes = {}
graph = graphs[0]
# Create entities
for p in people:
node = Node(label="person", properties={"name": p})
graph.add_node(node)
nodes[p] = node
# Fully connected graph
for src in nodes:
for dest in nodes:
if src != dest:
edge = Edge(nodes[src], "know", nodes[dest])
graph.add_edge(edge)
graph.commit()
# Count number of nodes in the graph
def test01_concurrent_aggregation(self):
q = """MATCH (p:person) RETURN count(p)"""
queries = [q] * CLIENT_COUNT
run_concurrent(self.env, queries, query_aggregate)
# Concurrently get neighbors of every node.
def test02_retrieve_neighbors(self):
q = """MATCH (p:person)-[know]->(n:person) RETURN n.name"""
queries = [q] * CLIENT_COUNT
run_concurrent(self.env, queries, query_neighbors)
# Concurrent writes
def test_03_concurrent_write(self):
queries = [
"""CREATE (c:country {id:"%d"})""" % i for i in range(CLIENT_COUNT)
]
run_concurrent(self.env, queries, query_write)
# Try to delete graph multiple times.
def test_04_concurrent_delete(self):
pool = Pool(nodes=CLIENT_COUNT)
# invoke queries
assertions = pool.map(delete_graph, graphs)
# Exactly one thread should have successfully deleted the graph.
self.env.assertEquals(assertions.count(True), 1)
# Try to delete a graph while multiple queries are executing.
def test_05_concurrent_read_delete(self):
redis_con = self.env.getConnection()
##############################################################################################
# Delete graph via Redis DEL key.
##############################################################################################
self.populate_graph()
pool = Pool(nodes=CLIENT_COUNT)
q = """UNWIND (range(0, 10000)) AS x WITH x AS x WHERE (x / 900) = 1 RETURN x"""
queries = [q] * CLIENT_COUNT
# invoke queries
m = pool.amap(thread_run_query, graphs, queries)
redis_con.delete(GRAPH_ID)
# wait for processes to return
m.wait()
# get the results
result = m.get()
# validate result.
self.env.assertTrue(all([r.result_set[0][0] == 900 for r in result]))
# Make sure Graph is empty, e.g. graph was deleted.
resultset = graphs[0].query("MATCH (n) RETURN count(n)").result_set
self.env.assertEquals(resultset[0][0], 0)
##############################################################################################
# Delete graph via Redis FLUSHALL.
##############################################################################################
self.populate_graph()
q = """UNWIND (range(0, 10000)) AS x WITH x AS x WHERE (x / 900) = 1 RETURN x"""
queries = [q] * CLIENT_COUNT
# invoke queries
m = pool.amap(thread_run_query, graphs, queries)
redis_con.flushall()
# wait for processes to return
m.wait()
# get the results
result = m.get()
# validate result.
self.env.assertTrue(all([r.result_set[0][0] == 900 for r in result]))
# Make sure Graph is empty, e.g. graph was deleted.
resultset = graphs[0].query("MATCH (n) RETURN count(n)").result_set
self.env.assertEquals(resultset[0][0], 0)
##############################################################################################
# Delete graph via GRAPH.DELETE.
##############################################################################################
self.populate_graph()
q = """UNWIND (range(0, 10000)) AS x WITH x AS x WHERE (x / 900) = 1 RETURN x"""
queries = [q] * CLIENT_COUNT
# invoke queries
m = pool.amap(thread_run_query, graphs, queries)
graphs[-1].delete()
# wait for processes to return
m.wait()
# get the results
result = m.get()
# validate result.
self.env.assertTrue(all([r.result_set[0][0] == 900 for r in result]))
# Make sure Graph is empty, e.g. graph was deleted.
resultset = graphs[0].query("MATCH (n) RETURN count(n)").result_set
self.env.assertEquals(resultset[0][0], 0)
def test_06_concurrent_write_delete(self):
# Test setup - validate that graph exists and possible results are None
graphs[0].query("MATCH (n) RETURN n")
pool = Pool(nodes=1)
redis_con = self.env.getConnection()
heavy_write_query = """UNWIND(range(0,999999)) as x CREATE(n)"""
writer = pool.apipe(thread_run_query, graphs[0], heavy_write_query)
redis_con.delete(GRAPH_ID)
writer.wait()
possible_exceptions = [
"Encountered different graph value when opened key " + GRAPH_ID,
"Encountered an empty key when opened key " + GRAPH_ID
]
result = writer.get()
if isinstance(result, str):
self.env.assertContains(result, possible_exceptions)
else:
self.env.assertEquals(1000000, result.nodes_created)
def test_07_concurrent_write_rename(self):
# Test setup - validate that graph exists and possible results are None
graphs[0].query("MATCH (n) RETURN n")
pool = Pool(nodes=1)
redis_con = self.env.getConnection()
new_graph = GRAPH_ID + "2"
# Create new empty graph with id GRAPH_ID + "2"
redis_con.execute_command("GRAPH.QUERY", new_graph,
"""MATCH (n) return n""", "--compact")
heavy_write_query = """UNWIND(range(0,999999)) as x CREATE(n)"""
writer = pool.apipe(thread_run_query, graphs[0], heavy_write_query)
redis_con.rename(GRAPH_ID, new_graph)
writer.wait()
# Possible scenarios:
# 1. Rename is done before query is sent. The name in the graph context is new_graph, so when upon commit, when trying to open new_graph key, it will encounter an empty key since new_graph is not a valid key.
# Note: As from https://github.com/RedisGraph/RedisGraph/pull/820 this may not be valid since the rename event handler might actually rename the graph key, before the query execution.
# 2. Rename is done during query executing, so when commiting and comparing stored graph context name (GRAPH_ID) to the retrived value graph context name (new_graph), the identifiers are not the same, since new_graph value is now stored at GRAPH_ID value.
possible_exceptions = [
"Encountered different graph value when opened key " + GRAPH_ID,
"Encountered an empty key when opened key " + new_graph
]
result = writer.get()
if isinstance(result, str):
self.env.assertContains(result, possible_exceptions)
else:
self.env.assertEquals(1000000, result.nodes_created)
def test_08_concurrent_write_replace(self):
# Test setup - validate that graph exists and possible results are None
graphs[0].query("MATCH (n) RETURN n")
pool = Pool(nodes=1)
redis_con = self.env.getConnection()
heavy_write_query = """UNWIND(range(0,999999)) as x CREATE(n)"""
writer = pool.apipe(thread_run_query, graphs[0], heavy_write_query)
set_result = redis_con.set(GRAPH_ID, "1")
writer.wait()
possible_exceptions = [
"Encountered a non-graph value type when opened key " + GRAPH_ID,
"WRONGTYPE Operation against a key holding the wrong kind of value"
]
result = writer.get()
if isinstance(result, str):
# If the SET command attempted to execute while the CREATE query was running,
# an exception should have been issued.
self.env.assertContains(result, possible_exceptions)
else:
# Otherwise, both the CREATE query and the SET command should have succeeded.
self.env.assertEquals(1000000, result.nodes_created)
self.env.assertEquals(set_result, True)
def test_09_concurrent_multiple_readers_after_big_write(self):
# Test issue #890
redis_graphs = []
for i in range(0, CLIENT_COUNT):
redis_con = self.env.getConnection()
redis_graphs.append(Graph("G890", redis_con))
redis_graphs[0].query(
"""UNWIND(range(0,999)) as x CREATE()-[:R]->()""")
read_query = """MATCH (n)-[r:R]->(m) RETURN n, r, m"""
queries = [read_query] * CLIENT_COUNT
pool = Pool(nodes=CLIENT_COUNT)
# invoke queries
m = pool.amap(thread_run_query, redis_graphs, queries)
# wait for processes to return
m.wait()
# get the results
result = m.get()
for i in range(CLIENT_COUNT):
if isinstance(result[i], str):
self.env.assertIsNone(result[i])
else:
self.env.assertEquals(1000, len(result[i].result_set))
class testConcurrentQueryFlow(FlowTestsBase):
def __init__(self):
self.env = Env()
global graphs
graphs = []
for i in range(0, CLIENT_COUNT):
redis_con = self.env.getConnection()
graphs.append(Graph(GRAPH_ID, redis_con))
self.populate_graph()
def populate_graph(self):
nodes = {}
graph = graphs[0]
# Create entities
for p in people:
node = Node(label="person", properties={"name": p})
graph.add_node(node)
nodes[p] = node
# Fully connected graph
for src in nodes:
for dest in nodes:
if src != dest:
edge = Edge(nodes[src], "know", nodes[dest])
graph.add_edge(edge)
graph.commit()
# Count number of nodes in the graph
def test01_concurrent_aggregation(self):
q = """MATCH (p:person) RETURN count(p)"""
threads = []
for i in range(CLIENT_COUNT):
graph = graphs[i]
t = threading.Thread(target=query_aggregate, args=(graph, q, i))
t.setDaemon(True)
threads.append(t)
t.start()
# Wait for threads to return.
for i in range(CLIENT_COUNT):
t = threads[i]
t.join()
self.env.assertTrue(assertions[i])
# Concurrently get neighbors of every node.
def test02_retrieve_neighbors(self):
q = """MATCH (p:person)-[know]->(n:person) RETURN n.name"""
threads = []
for i in range(CLIENT_COUNT):
graph = graphs[i]
t = threading.Thread(target=query_neighbors, args=(graph, q, i))
t.setDaemon(True)
threads.append(t)
t.start()
# Wait for threads to return.
for i in range(CLIENT_COUNT):
t = threads[i]
t.join()
self.env.assertTrue(assertions[i])
# Concurrent writes
def test_03_concurrent_write(self):
threads = []
for i in range(CLIENT_COUNT):
graph = graphs[i]
q = """CREATE (c:country {id:"%d"})""" % i
t = threading.Thread(target=query_write, args=(graph, q, i))
t.setDaemon(True)
threads.append(t)
t.start()
# Wait for threads to return.
for i in range(CLIENT_COUNT):
t = threads[i]
t.join()
self.env.assertTrue(assertions[i])
# Try to delete graph multiple times.
def test_04_concurrent_delete(self):
threads = []
for i in range(CLIENT_COUNT):
graph = graphs[i]
t = threading.Thread(target=delete_graph, args=(graph, i))
t.setDaemon(True)
threads.append(t)
t.start()
# Wait for threads to return.
for i in range(CLIENT_COUNT):
t = threads[i]
t.join()
# Exactly one thread should have successfully deleted the graph.
self.env.assertEquals(assertions.count(True), 1)
# Try to delete a graph while multiple queries are executing.
def test_05_concurrent_read_delete(self):
redis_con = self.env.getConnection()
##############################################################################################
# Delete graph via Redis DEL key.
##############################################################################################
self.populate_graph()
q = """UNWIND (range(0, 10000)) AS x WITH x AS x WHERE (x / 900) = 1 RETURN x"""
threads = []
for i in range(CLIENT_COUNT):
graph = graphs[i]
t = threading.Thread(target=thread_run_query, args=(graph, q, i))
t.setDaemon(True)
threads.append(t)
t.start()
redis_con.delete(GRAPH_ID)
# Wait for threads to return.
for i in range(CLIENT_COUNT):
t = threads[i]
t.join()
self.env.assertEquals(assertions[i].result_set[0][0], 900)
# Make sure Graph is empty, e.g. graph was deleted.
resultset = graphs[0].query("MATCH (n) RETURN count(n)").result_set
self.env.assertEquals(resultset[0][0], 0)
##############################################################################################
# Delete graph via Redis FLUSHALL.
##############################################################################################
self.populate_graph()
q = """UNWIND (range(0, 10000)) AS x WITH x AS x WHERE (x / 900) = 1 RETURN x"""
threads = []
for i in range(CLIENT_COUNT):
graph = graphs[i]
t = threading.Thread(target=thread_run_query, args=(graph, q, i))
t.setDaemon(True)
threads.append(t)
t.start()
redis_con.flushall()
# Wait for threads to return.
for i in range(CLIENT_COUNT):
t = threads[i]
t.join()
self.env.assertEquals(assertions[i].result_set[0][0], 900)
# Make sure Graph is empty, e.g. graph was deleted.
resultset = graphs[0].query("MATCH (n) RETURN count(n)").result_set
self.env.assertEquals(resultset[0][0], 0)
##############################################################################################
# Delete graph via GRAPH.DELETE.
##############################################################################################
self.populate_graph()
q = """UNWIND (range(0, 10000)) AS x WITH x AS x WHERE (x / 900) = 1 RETURN x"""
threads = []
for i in range(CLIENT_COUNT):
graph = graphs[i]
t = threading.Thread(target=thread_run_query, args=(graph, q, i))
t.setDaemon(True)
threads.append(t)
t.start()
graphs[i].delete()
# Wait for threads to return.
for i in range(CLIENT_COUNT):
t = threads[i]
t.join()
self.env.assertEquals(assertions[i].result_set[0][0], 900)
# Make sure Graph is empty, e.g. graph was deleted.
resultset = graphs[0].query("MATCH (n) RETURN count(n)").result_set
self.env.assertEquals(resultset[0][0], 0)
def test_06_concurrent_write_delete(self):
# Test setup - validate that graph exists and possible results are None
graphs[0].query("MATCH (n) RETURN n")
assertions[0] = None
exceptions[0] = None
redis_con = self.env.getConnection()
heavy_write_query = """UNWIND(range(0,999999)) as x CREATE(n)"""
writer = threading.Thread(target=thread_run_query,
args=(graphs[0], heavy_write_query, 0))
writer.setDaemon(True)
writer.start()
redis_con.delete(GRAPH_ID)
writer.join()
if exceptions[0] is not None:
self.env.assertEquals(
exceptions[0],
"Encountered an empty key when opened key " + GRAPH_ID)
else:
self.env.assertEquals(1000000, assertions[0].nodes_created)
def test_07_concurrent_write_rename(self):
# Test setup - validate that graph exists and possible results are None
graphs[0].query("MATCH (n) RETURN n")
assertions[0] = None
exceptions[0] = None
redis_con = self.env.getConnection()
new_graph = GRAPH_ID + "2"
# Create new empty graph with id GRAPH_ID + "2"
redis_con.execute_command("GRAPH.QUERY", new_graph,
"""MATCH (n) return n""", "--compact")
heavy_write_query = """UNWIND(range(0,999999)) as x CREATE(n)"""
writer = threading.Thread(target=thread_run_query,
args=(graphs[0], heavy_write_query, 0))
writer.setDaemon(True)
writer.start()
redis_con.rename(new_graph, GRAPH_ID)
writer.join()
# Possible scenarios:
# 1. Rename is done before query is sent. The name in the graph context is new_graph, so when upon commit, when trying to open new_graph key, it will encounter an empty key since new_graph is not a valid key.
# Note: As from https://github.com/RedisGraph/RedisGraph/pull/820 this may not be valid since the rename event handler might actually rename the graph key, before the query execution.
# 2. Rename is done during query executing, so when commiting and comparing stored graph context name (GRAPH_ID) to the retrived value graph context name (new_graph), the identifiers are not the same, since new_graph value is now stored at GRAPH_ID value.
possible_exceptions = [
"Encountered different graph value when opened key " + GRAPH_ID,
"Encountered an empty key when opened key " + new_graph
]
if exceptions[0] is not None:
self.env.assertContains(exceptions[0], possible_exceptions)
else:
self.env.assertEquals(1000000, assertions[0].nodes_created)
def test_08_concurrent_write_replace(self):
# Test setup - validate that graph exists and possible results are None
graphs[0].query("MATCH (n) RETURN n")
assertions[0] = None
exceptions[0] = None
redis_con = self.env.getConnection()
heavy_write_query = """UNWIND(range(0,999999)) as x CREATE(n)"""
writer = threading.Thread(target=thread_run_query,
args=(graphs[0], heavy_write_query, 0))
writer.setDaemon(True)
writer.start()
set_result = redis_con.set(GRAPH_ID, "1")
writer.join()
if exceptions[0] is not None:
# If the SET command attempted to execute while the CREATE query was running,
# an exception should have been issued.
self.env.assertEquals(
exceptions[0],
"Encountered a non-graph value type when opened key " +
GRAPH_ID)
else:
# Otherwise, both the CREATE query and the SET command should have succeeded.
self.env.assertEquals(1000000, assertions[0].nodes_created)
self.env.assertEquals(set_result, True)
def test_09_concurrent_multiple_readers_after_big_write(self):
# Test issue #890
global assertions
global exceptions
redis_con = self.env.getConnection()
redis_graph = Graph("G890", redis_con)
redis_graph.query("""UNWIND(range(0,999)) as x CREATE()-[:R]->()""")
read_query = """MATCH (n)-[r:R]->(m) RETURN n, r, m"""
assertions = [True] * CLIENT_COUNT
exceptions = [None] * CLIENT_COUNT
threads = []
for i in range(CLIENT_COUNT):
t = threading.Thread(target=thread_run_query,
args=(redis_graph, read_query, i))
t.setDaemon(True)
threads.append(t)
t.start()
for i in range(CLIENT_COUNT):
t = threads[i]
t.join()
for i in range(CLIENT_COUNT):
self.env.assertIsNone(exceptions[i])
self.env.assertEquals(1000, len(assertions[i].result_set))
