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memgraph/tests/unit/storage_v2_replication.cpp
Jeremy B d4f0bb0e38
Correct inconsistencies w.r.t. sync replication (#435) 
Add a report for the case where a sync replica does not confirm within a timeout:
-Add a new exception: ReplicationException to be returned when one sync replica does not confirm the reception of messages (new data, new constraint/index, or for triggers)
-Update the logic to throw the ReplicationException when needed for insertion of new data, triggers, or creation of new constraint/index
-Add end-to-end tests to cover the loss of connection with sync/async replicas when adding new data, adding new constraint/indexes, and triggers

Add end-to-end tests to cover the creation and drop of indexes, existence constraints, and uniqueness constraints

Improved tooling function mg_sleep_and_assert to also show the last result when duration is exceeded
2022-08-09 11:29:55 +02:00

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// Copyright 2022 Memgraph Ltd.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
// License, and you may not use this file except in compliance with the Business Source License.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed
// by the Apache License, Version 2.0, included in the file
// licenses/APL.txt.
#include <chrono>
#include <thread>
#include <fmt/format.h>
#include <gmock/gmock-generated-matchers.h>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <storage/v2/property_value.hpp>
#include <storage/v2/replication/enums.hpp>
#include <storage/v2/storage.hpp>
#include "storage/v2/view.hpp"
using testing::UnorderedElementsAre;
class ReplicationTest : public ::testing::Test {
protected:
std::filesystem::path storage_directory{std::filesystem::temp_directory_path() /
"MG_test_unit_storage_v2_replication"};
void SetUp() override { Clear(); }
void TearDown() override { Clear(); }
memgraph::storage::Config configuration{
.items = {.properties_on_edges = true},
.durability = {
.storage_directory = storage_directory,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL,
}};
const std::string local_host = ("127.0.0.1");
const std::array<uint16_t, 2> ports{10000, 20000};
const std::array<std::string, 2> replicas = {"REPLICA1", "REPLICA2"};
private:
void Clear() {
if (!std::filesystem::exists(storage_directory)) return;
std::filesystem::remove_all(storage_directory);
}
};
TEST_F(ReplicationTest, BasicSynchronousReplicationTest) {
memgraph::storage::Storage main_store(configuration);
memgraph::storage::Storage replica_store(configuration);
replica_store.SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]});
ASSERT_FALSE(main_store
.RegisterReplica("REPLICA", memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
// vertex create
// vertex add label
// vertex set property
const auto *vertex_label = "vertex_label";
const auto *vertex_property = "vertex_property";
const auto *vertex_property_value = "vertex_property_value";
std::optional<memgraph::storage::Gid> vertex_gid;
{
auto acc = main_store.Access();
auto v = acc.CreateVertex();
vertex_gid.emplace(v.Gid());
ASSERT_TRUE(v.AddLabel(main_store.NameToLabel(vertex_label)).HasValue());
ASSERT_TRUE(v.SetProperty(main_store.NameToProperty(vertex_property),
memgraph::storage::PropertyValue(vertex_property_value))
.HasValue());
ASSERT_FALSE(acc.Commit().HasError());
}
{
auto acc = replica_store.Access();
const auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
const auto labels = v->Labels(memgraph::storage::View::OLD);
ASSERT_TRUE(labels.HasValue());
ASSERT_EQ(labels->size(), 1);
ASSERT_THAT(*labels, UnorderedElementsAre(replica_store.NameToLabel(vertex_label)));
const auto properties = v->Properties(memgraph::storage::View::OLD);
ASSERT_TRUE(properties.HasValue());
ASSERT_EQ(properties->size(), 1);
ASSERT_THAT(*properties,
UnorderedElementsAre(std::make_pair(replica_store.NameToProperty(vertex_property),
memgraph::storage::PropertyValue(vertex_property_value))));
ASSERT_FALSE(acc.Commit().HasError());
}
// vertex remove label
{
auto acc = main_store.Access();
auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
ASSERT_TRUE(v->RemoveLabel(main_store.NameToLabel(vertex_label)).HasValue());
ASSERT_FALSE(acc.Commit().HasError());
}
{
auto acc = replica_store.Access();
const auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
const auto labels = v->Labels(memgraph::storage::View::OLD);
ASSERT_TRUE(labels.HasValue());
ASSERT_EQ(labels->size(), 0);
ASSERT_FALSE(acc.Commit().HasError());
}
// vertex delete
{
auto acc = main_store.Access();
auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
ASSERT_TRUE(acc.DeleteVertex(&*v).HasValue());
ASSERT_FALSE(acc.Commit().HasError());
}
{
auto acc = replica_store.Access();
const auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_FALSE(v);
vertex_gid.reset();
ASSERT_FALSE(acc.Commit().HasError());
}
// edge create
// edge set property
const auto *edge_type = "edge_type";
const auto *edge_property = "edge_property";
const auto *edge_property_value = "edge_property_value";
std::optional<memgraph::storage::Gid> edge_gid;
{
auto acc = main_store.Access();
auto v = acc.CreateVertex();
vertex_gid.emplace(v.Gid());
auto edge = acc.CreateEdge(&v, &v, main_store.NameToEdgeType(edge_type));
ASSERT_TRUE(edge.HasValue());
ASSERT_TRUE(edge->SetProperty(main_store.NameToProperty(edge_property),
memgraph::storage::PropertyValue(edge_property_value))
.HasValue());
edge_gid.emplace(edge->Gid());
ASSERT_FALSE(acc.Commit().HasError());
}
const auto find_edge = [&](const auto &edges,
const memgraph::storage::Gid edge_gid) -> std::optional<memgraph::storage::EdgeAccessor> {
for (const auto &edge : edges) {
if (edge.Gid() == edge_gid) {
return edge;
}
}
return std::nullopt;
};
{
auto acc = replica_store.Access();
const auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
const auto out_edges = v->OutEdges(memgraph::storage::View::OLD);
ASSERT_TRUE(out_edges.HasValue());
const auto edge = find_edge(*out_edges, *edge_gid);
ASSERT_EQ(edge->EdgeType(), replica_store.NameToEdgeType(edge_type));
const auto properties = edge->Properties(memgraph::storage::View::OLD);
ASSERT_TRUE(properties.HasValue());
ASSERT_EQ(properties->size(), 1);
ASSERT_THAT(*properties,
UnorderedElementsAre(std::make_pair(replica_store.NameToProperty(edge_property),
memgraph::storage::PropertyValue(edge_property_value))));
ASSERT_FALSE(acc.Commit().HasError());
}
// delete edge
{
auto acc = main_store.Access();
auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
auto out_edges = v->OutEdges(memgraph::storage::View::OLD);
auto edge = find_edge(*out_edges, *edge_gid);
ASSERT_TRUE(edge);
ASSERT_TRUE(acc.DeleteEdge(&*edge).HasValue());
ASSERT_FALSE(acc.Commit().HasError());
}
{
auto acc = replica_store.Access();
const auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
const auto out_edges = v->OutEdges(memgraph::storage::View::OLD);
ASSERT_TRUE(out_edges.HasValue());
ASSERT_FALSE(find_edge(*out_edges, *edge_gid));
ASSERT_FALSE(acc.Commit().HasError());
}
// label index create
// label property index create
// existence constraint create
// unique constriant create
const auto *label = "label";
const auto *property = "property";
const auto *property_extra = "property_extra";
{
ASSERT_FALSE(main_store.CreateIndex(main_store.NameToLabel(label)).HasError());
ASSERT_FALSE(main_store.CreateIndex(main_store.NameToLabel(label), main_store.NameToProperty(property)).HasError());
ASSERT_FALSE(
main_store.CreateExistenceConstraint(main_store.NameToLabel(label), main_store.NameToProperty(property))
.HasError());
ASSERT_FALSE(main_store
.CreateUniqueConstraint(main_store.NameToLabel(label), {main_store.NameToProperty(property),
main_store.NameToProperty(property_extra)})
.HasError());
}
{
const auto indices = replica_store.ListAllIndices();
ASSERT_THAT(indices.label, UnorderedElementsAre(replica_store.NameToLabel(label)));
ASSERT_THAT(indices.label_property, UnorderedElementsAre(std::make_pair(replica_store.NameToLabel(label),
replica_store.NameToProperty(property))));
const auto constraints = replica_store.ListAllConstraints();
ASSERT_THAT(constraints.existence, UnorderedElementsAre(std::make_pair(replica_store.NameToLabel(label),
replica_store.NameToProperty(property))));
ASSERT_THAT(constraints.unique,
UnorderedElementsAre(std::make_pair(
replica_store.NameToLabel(label),
std::set{replica_store.NameToProperty(property), replica_store.NameToProperty(property_extra)})));
}
// label index drop
// label property index drop
// existence constraint drop
// unique constriant drop
{
ASSERT_FALSE(main_store.DropIndex(main_store.NameToLabel(label)).HasError());
ASSERT_FALSE(main_store.DropIndex(main_store.NameToLabel(label), main_store.NameToProperty(property)).HasError());
ASSERT_FALSE(main_store.DropExistenceConstraint(main_store.NameToLabel(label), main_store.NameToProperty(property))
.HasError());
ASSERT_EQ(main_store
.DropUniqueConstraint(main_store.NameToLabel(label), {main_store.NameToProperty(property),
main_store.NameToProperty(property_extra)})
.GetValue(),
memgraph::storage::UniqueConstraints::DeletionStatus::SUCCESS);
}
{
const auto indices = replica_store.ListAllIndices();
ASSERT_EQ(indices.label.size(), 0);
ASSERT_EQ(indices.label_property.size(), 0);
const auto constraints = replica_store.ListAllConstraints();
ASSERT_EQ(constraints.existence.size(), 0);
ASSERT_EQ(constraints.unique.size(), 0);
}
}
TEST_F(ReplicationTest, MultipleSynchronousReplicationTest) {
memgraph::storage::Storage main_store(
{.durability = {
.storage_directory = storage_directory,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL,
}});
memgraph::storage::Storage replica_store1(
{.durability = {
.storage_directory = storage_directory,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL,
}});
replica_store1.SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]});
memgraph::storage::Storage replica_store2(
{.durability = {
.storage_directory = storage_directory,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL,
}});
replica_store2.SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[1]});
ASSERT_FALSE(main_store
.RegisterReplica(replicas[0], memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
ASSERT_FALSE(main_store
.RegisterReplica(replicas[1], memgraph::io::network::Endpoint{local_host, ports[1]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
const auto *vertex_label = "label";
const auto *vertex_property = "property";
const auto *vertex_property_value = "property_value";
std::optional<memgraph::storage::Gid> vertex_gid;
{
auto acc = main_store.Access();
auto v = acc.CreateVertex();
ASSERT_TRUE(v.AddLabel(main_store.NameToLabel(vertex_label)).HasValue());
ASSERT_TRUE(v.SetProperty(main_store.NameToProperty(vertex_property),
memgraph::storage::PropertyValue(vertex_property_value))
.HasValue());
vertex_gid.emplace(v.Gid());
ASSERT_FALSE(acc.Commit().HasError());
}
const auto check_replica = [&](memgraph::storage::Storage *replica_store) {
auto acc = replica_store->Access();
const auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
const auto labels = v->Labels(memgraph::storage::View::OLD);
ASSERT_TRUE(labels.HasValue());
ASSERT_THAT(*labels, UnorderedElementsAre(replica_store->NameToLabel(vertex_label)));
ASSERT_FALSE(acc.Commit().HasError());
};
check_replica(&replica_store1);
check_replica(&replica_store2);
main_store.UnregisterReplica(replicas[1]);
{
auto acc = main_store.Access();
auto v = acc.CreateVertex();
vertex_gid.emplace(v.Gid());
ASSERT_FALSE(acc.Commit().HasError());
}
// REPLICA1 should contain the new vertex
{
auto acc = replica_store1.Access();
const auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
ASSERT_FALSE(acc.Commit().HasError());
}
// REPLICA2 should not contain the new vertex
{
auto acc = replica_store2.Access();
const auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_FALSE(v);
ASSERT_FALSE(acc.Commit().HasError());
}
}
TEST_F(ReplicationTest, RecoveryProcess) {
std::vector<memgraph::storage::Gid> vertex_gids;
// Force the creation of snapshot
{
memgraph::storage::Storage main_store(
{.durability = {
.storage_directory = storage_directory,
.recover_on_startup = true,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL,
.snapshot_on_exit = true,
}});
{
auto acc = main_store.Access();
// Create the vertex before registering a replica
auto v = acc.CreateVertex();
vertex_gids.emplace_back(v.Gid());
ASSERT_FALSE(acc.Commit().HasError());
}
}
{
// Create second WAL
memgraph::storage::Storage main_store(
{.durability = {
.storage_directory = storage_directory,
.recover_on_startup = true,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL}});
// Create vertices in 2 different transactions
{
auto acc = main_store.Access();
auto v = acc.CreateVertex();
vertex_gids.emplace_back(v.Gid());
ASSERT_FALSE(acc.Commit().HasError());
}
{
auto acc = main_store.Access();
auto v = acc.CreateVertex();
vertex_gids.emplace_back(v.Gid());
ASSERT_FALSE(acc.Commit().HasError());
}
}
memgraph::storage::Storage main_store(
{.durability = {
.storage_directory = storage_directory,
.recover_on_startup = true,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL,
}});
static constexpr const auto *property_name = "property_name";
static constexpr const auto property_value = 1;
{
// Force the creation of current WAL file
auto acc = main_store.Access();
for (const auto &vertex_gid : vertex_gids) {
auto v = acc.FindVertex(vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
ASSERT_TRUE(
v->SetProperty(main_store.NameToProperty(property_name), memgraph::storage::PropertyValue(property_value))
.HasValue());
}
ASSERT_FALSE(acc.Commit().HasError());
}
std::filesystem::path replica_storage_directory{std::filesystem::temp_directory_path() /
"MG_test_unit_storage_v2_replication_replica"};
memgraph::utils::OnScopeExit replica_directory_cleaner(
[&]() { std::filesystem::remove_all(replica_storage_directory); });
static constexpr const auto *vertex_label = "vertex_label";
{
memgraph::storage::Storage replica_store(
{.durability = {
.storage_directory = replica_storage_directory,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL}});
replica_store.SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]});
ASSERT_FALSE(main_store
.RegisterReplica(replicas[0], memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
ASSERT_EQ(main_store.GetReplicaState(replicas[0]), memgraph::storage::replication::ReplicaState::RECOVERY);
while (main_store.GetReplicaState(replicas[0]) != memgraph::storage::replication::ReplicaState::READY) {
std::this_thread::sleep_for(std::chrono::milliseconds(10));
}
{
auto acc = main_store.Access();
for (const auto &vertex_gid : vertex_gids) {
auto v = acc.FindVertex(vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
ASSERT_TRUE(v->AddLabel(main_store.NameToLabel(vertex_label)).HasValue());
}
ASSERT_FALSE(acc.Commit().HasError());
}
{
auto acc = replica_store.Access();
for (const auto &vertex_gid : vertex_gids) {
auto v = acc.FindVertex(vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
const auto labels = v->Labels(memgraph::storage::View::OLD);
ASSERT_TRUE(labels.HasValue());
ASSERT_THAT(*labels, UnorderedElementsAre(replica_store.NameToLabel(vertex_label)));
const auto properties = v->Properties(memgraph::storage::View::OLD);
ASSERT_TRUE(properties.HasValue());
ASSERT_THAT(*properties,
UnorderedElementsAre(std::make_pair(replica_store.NameToProperty(property_name),
memgraph::storage::PropertyValue(property_value))));
}
ASSERT_FALSE(acc.Commit().HasError());
}
}
{
memgraph::storage::Storage replica_store(
{.durability = {
.storage_directory = replica_storage_directory,
.recover_on_startup = true,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL}});
{
auto acc = replica_store.Access();
for (const auto &vertex_gid : vertex_gids) {
auto v = acc.FindVertex(vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
const auto labels = v->Labels(memgraph::storage::View::OLD);
ASSERT_TRUE(labels.HasValue());
ASSERT_THAT(*labels, UnorderedElementsAre(replica_store.NameToLabel(vertex_label)));
const auto properties = v->Properties(memgraph::storage::View::OLD);
ASSERT_TRUE(properties.HasValue());
ASSERT_THAT(*properties,
UnorderedElementsAre(std::make_pair(replica_store.NameToProperty(property_name),
memgraph::storage::PropertyValue(property_value))));
}
ASSERT_FALSE(acc.Commit().HasError());
}
}
}
TEST_F(ReplicationTest, BasicAsynchronousReplicationTest) {
memgraph::storage::Storage main_store(configuration);
memgraph::storage::Storage replica_store_async(configuration);
replica_store_async.SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[1]});
ASSERT_FALSE(main_store
.RegisterReplica("REPLICA_ASYNC", memgraph::io::network::Endpoint{local_host, ports[1]},
memgraph::storage::replication::ReplicationMode::ASYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
static constexpr size_t vertices_create_num = 10;
std::vector<memgraph::storage::Gid> created_vertices;
for (size_t i = 0; i < vertices_create_num; ++i) {
auto acc = main_store.Access();
auto v = acc.CreateVertex();
created_vertices.push_back(v.Gid());
ASSERT_FALSE(acc.Commit().HasError());
if (i == 0) {
ASSERT_EQ(main_store.GetReplicaState("REPLICA_ASYNC"), memgraph::storage::replication::ReplicaState::REPLICATING);
} else {
ASSERT_EQ(main_store.GetReplicaState("REPLICA_ASYNC"), memgraph::storage::replication::ReplicaState::RECOVERY);
}
}
while (main_store.GetReplicaState("REPLICA_ASYNC") != memgraph::storage::replication::ReplicaState::READY) {
std::this_thread::sleep_for(std::chrono::milliseconds(10));
}
ASSERT_TRUE(std::all_of(created_vertices.begin(), created_vertices.end(), [&](const auto vertex_gid) {
auto acc = replica_store_async.Access();
auto v = acc.FindVertex(vertex_gid, memgraph::storage::View::OLD);
const bool exists = v.has_value();
EXPECT_FALSE(acc.Commit().HasError());
return exists;
}));
}
TEST_F(ReplicationTest, EpochTest) {
memgraph::storage::Storage main_store(configuration);
memgraph::storage::Storage replica_store1(configuration);
replica_store1.SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]});
memgraph::storage::Storage replica_store2(configuration);
replica_store2.SetReplicaRole(memgraph::io::network::Endpoint{local_host, 10001});
ASSERT_FALSE(main_store
.RegisterReplica(replicas[0], memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
ASSERT_FALSE(main_store
.RegisterReplica(replicas[1], memgraph::io::network::Endpoint{local_host, 10001},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
std::optional<memgraph::storage::Gid> vertex_gid;
{
auto acc = main_store.Access();
const auto v = acc.CreateVertex();
vertex_gid.emplace(v.Gid());
ASSERT_FALSE(acc.Commit().HasError());
}
{
auto acc = replica_store1.Access();
const auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
ASSERT_FALSE(acc.Commit().HasError());
}
{
auto acc = replica_store2.Access();
const auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
ASSERT_FALSE(acc.Commit().HasError());
}
main_store.UnregisterReplica(replicas[0]);
main_store.UnregisterReplica(replicas[1]);
replica_store1.SetMainReplicationRole();
ASSERT_FALSE(replica_store1
.RegisterReplica(replicas[1], memgraph::io::network::Endpoint{local_host, 10001},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
{
auto acc = main_store.Access();
acc.CreateVertex();
ASSERT_FALSE(acc.Commit().HasError());
}
{
auto acc = replica_store1.Access();
auto v = acc.CreateVertex();
vertex_gid.emplace(v.Gid());
ASSERT_FALSE(acc.Commit().HasError());
}
// Replica1 should forward it's vertex to Replica2
{
auto acc = replica_store2.Access();
const auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_TRUE(v);
ASSERT_FALSE(acc.Commit().HasError());
}
replica_store1.SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]});
ASSERT_TRUE(main_store
.RegisterReplica(replicas[0], memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
{
auto acc = main_store.Access();
const auto v = acc.CreateVertex();
vertex_gid.emplace(v.Gid());
ASSERT_FALSE(acc.Commit().HasError());
}
// Replica1 is not compatible with the main so it shouldn't contain
// it's newest vertex
{
auto acc = replica_store1.Access();
const auto v = acc.FindVertex(*vertex_gid, memgraph::storage::View::OLD);
ASSERT_FALSE(v);
ASSERT_FALSE(acc.Commit().HasError());
}
}
TEST_F(ReplicationTest, ReplicationInformation) {
memgraph::storage::Storage main_store(configuration);
memgraph::storage::Storage replica_store1(configuration);
const memgraph::io::network::Endpoint replica1_endpoint{local_host, 10001};
replica_store1.SetReplicaRole(replica1_endpoint);
const memgraph::io::network::Endpoint replica2_endpoint{local_host, 10002};
memgraph::storage::Storage replica_store2(configuration);
replica_store2.SetReplicaRole(replica2_endpoint);
const std::string replica1_name{replicas[0]};
ASSERT_FALSE(main_store
.RegisterReplica(replica1_name, replica1_endpoint,
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
const std::string replica2_name{replicas[1]};
ASSERT_FALSE(main_store
.RegisterReplica(replica2_name, replica2_endpoint,
memgraph::storage::replication::ReplicationMode::ASYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
ASSERT_EQ(main_store.GetReplicationRole(), memgraph::storage::ReplicationRole::MAIN);
ASSERT_EQ(replica_store1.GetReplicationRole(), memgraph::storage::ReplicationRole::REPLICA);
ASSERT_EQ(replica_store2.GetReplicationRole(), memgraph::storage::ReplicationRole::REPLICA);
const auto replicas_info = main_store.ReplicasInfo();
ASSERT_EQ(replicas_info.size(), 2);
const auto &first_info = replicas_info[0];
ASSERT_EQ(first_info.name, replica1_name);
ASSERT_EQ(first_info.mode, memgraph::storage::replication::ReplicationMode::SYNC);
ASSERT_EQ(first_info.endpoint, replica1_endpoint);
ASSERT_EQ(first_info.state, memgraph::storage::replication::ReplicaState::READY);
const auto &second_info = replicas_info[1];
ASSERT_EQ(second_info.name, replica2_name);
ASSERT_EQ(second_info.mode, memgraph::storage::replication::ReplicationMode::ASYNC);
ASSERT_EQ(second_info.endpoint, replica2_endpoint);
ASSERT_EQ(second_info.state, memgraph::storage::replication::ReplicaState::READY);
}
TEST_F(ReplicationTest, ReplicationReplicaWithExistingName) {
memgraph::storage::Storage main_store(configuration);
memgraph::storage::Storage replica_store1(configuration);
const memgraph::io::network::Endpoint replica1_endpoint{local_host, 10001};
replica_store1.SetReplicaRole(replica1_endpoint);
const memgraph::io::network::Endpoint replica2_endpoint{local_host, 10002};
memgraph::storage::Storage replica_store2(configuration);
replica_store2.SetReplicaRole(replica2_endpoint);
const std::string replica1_name{replicas[0]};
ASSERT_FALSE(main_store
.RegisterReplica(replica1_name, replica1_endpoint,
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
const std::string replica2_name{replicas[0]};
ASSERT_TRUE(main_store
.RegisterReplica(replica2_name, replica2_endpoint,
memgraph::storage::replication::ReplicationMode::ASYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.GetError() == memgraph::storage::Storage::RegisterReplicaError::NAME_EXISTS);
}
TEST_F(ReplicationTest, ReplicationReplicaWithExistingEndPoint) {
memgraph::storage::Storage main_store(configuration);
memgraph::storage::Storage replica_store1(configuration);
const memgraph::io::network::Endpoint replica1_endpoint{local_host, 10001};
replica_store1.SetReplicaRole(replica1_endpoint);
const memgraph::io::network::Endpoint replica2_endpoint{local_host, 10001};
memgraph::storage::Storage replica_store2(configuration);
replica_store2.SetReplicaRole(replica2_endpoint);
const std::string replica1_name{replicas[0]};
ASSERT_FALSE(main_store
.RegisterReplica(replica1_name, replica1_endpoint,
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.HasError());
const std::string replica2_name{replicas[1]};
ASSERT_TRUE(main_store
.RegisterReplica(replica2_name, replica2_endpoint,
memgraph::storage::replication::ReplicationMode::ASYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.GetError() == memgraph::storage::Storage::RegisterReplicaError::END_POINT_EXISTS);
}
TEST_F(ReplicationTest, RestoringReplicationAtStartupAftgerDroppingReplica) {
auto main_config = configuration;
main_config.durability.restore_replicas_on_startup = true;
auto main_store = std::make_unique<memgraph::storage::Storage>(main_config);
memgraph::storage::Storage replica_store1(configuration);
replica_store1.SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]});
memgraph::storage::Storage replica_store2(configuration);
replica_store2.SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[1]});
auto res = main_store->RegisterReplica(replicas[0], memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID);
ASSERT_FALSE(res.HasError());
res = main_store->RegisterReplica(replicas[1], memgraph::io::network::Endpoint{local_host, ports[1]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID);
ASSERT_FALSE(res.HasError());
auto replica_infos = main_store->ReplicasInfo();
ASSERT_EQ(replica_infos.size(), 2);
ASSERT_EQ(replica_infos[0].name, replicas[0]);
ASSERT_EQ(replica_infos[0].endpoint.address, local_host);
ASSERT_EQ(replica_infos[0].endpoint.port, ports[0]);
ASSERT_EQ(replica_infos[1].name, replicas[1]);
ASSERT_EQ(replica_infos[1].endpoint.address, local_host);
ASSERT_EQ(replica_infos[1].endpoint.port, ports[1]);
main_store.reset();
auto other_main_store = std::make_unique<memgraph::storage::Storage>(main_config);
replica_infos = other_main_store->ReplicasInfo();
ASSERT_EQ(replica_infos.size(), 2);
ASSERT_EQ(replica_infos[0].name, replicas[0]);
ASSERT_EQ(replica_infos[0].endpoint.address, local_host);
ASSERT_EQ(replica_infos[0].endpoint.port, ports[0]);
ASSERT_EQ(replica_infos[1].name, replicas[1]);
ASSERT_EQ(replica_infos[1].endpoint.address, local_host);
ASSERT_EQ(replica_infos[1].endpoint.port, ports[1]);
}
TEST_F(ReplicationTest, RestoringReplicationAtStartup) {
auto main_config = configuration;
main_config.durability.restore_replicas_on_startup = true;
auto main_store = std::make_unique<memgraph::storage::Storage>(main_config);
memgraph::storage::Storage replica_store1(configuration);
replica_store1.SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]});
memgraph::storage::Storage replica_store2(configuration);
replica_store2.SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[1]});
auto res = main_store->RegisterReplica(replicas[0], memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID);
ASSERT_FALSE(res.HasError());
res = main_store->RegisterReplica(replicas[1], memgraph::io::network::Endpoint{local_host, ports[1]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID);
ASSERT_FALSE(res.HasError());
auto replica_infos = main_store->ReplicasInfo();
ASSERT_EQ(replica_infos.size(), 2);
ASSERT_EQ(replica_infos[0].name, replicas[0]);
ASSERT_EQ(replica_infos[0].endpoint.address, local_host);
ASSERT_EQ(replica_infos[0].endpoint.port, ports[0]);
ASSERT_EQ(replica_infos[1].name, replicas[1]);
ASSERT_EQ(replica_infos[1].endpoint.address, local_host);
ASSERT_EQ(replica_infos[1].endpoint.port, ports[1]);
const auto unregister_res = main_store->UnregisterReplica(replicas[0]);
ASSERT_TRUE(unregister_res);
replica_infos = main_store->ReplicasInfo();
ASSERT_EQ(replica_infos.size(), 1);
ASSERT_EQ(replica_infos[0].name, replicas[1]);
ASSERT_EQ(replica_infos[0].endpoint.address, local_host);
ASSERT_EQ(replica_infos[0].endpoint.port, ports[1]);
main_store.reset();
auto other_main_store = std::make_unique<memgraph::storage::Storage>(main_config);
replica_infos = other_main_store->ReplicasInfo();
ASSERT_EQ(replica_infos.size(), 1);
ASSERT_EQ(replica_infos[0].name, replicas[1]);
ASSERT_EQ(replica_infos[0].endpoint.address, local_host);
ASSERT_EQ(replica_infos[0].endpoint.port, ports[1]);
}
TEST_F(ReplicationTest, AddingInvalidReplica) {
memgraph::storage::Storage main_store(configuration);
ASSERT_TRUE(main_store
.RegisterReplica("REPLICA", memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID)
.GetError() == memgraph::storage::Storage::RegisterReplicaError::CONNECTION_FAILED);
}
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