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memgraph/tests/unit/storage_v2_replication.cpp

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// Copyright 2023 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 <memory>
#include <thread>
#include <fmt/format.h>
#include <gmock/gmock-generated-matchers.h>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <storage/v2/inmemory/storage.hpp>
#include <storage/v2/property_value.hpp>
#include <storage/v2/replication/enums.hpp>
#include "storage/v2/replication/config.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) {
std::unique_ptr<memgraph::storage::Storage> main_store =
std::make_unique<memgraph::storage::InMemoryStorage>(configuration);
std::unique_ptr<memgraph::storage::Storage> replica_store =
std::make_unique<memgraph::storage::InMemoryStorage>(configuration);
auto *main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(main_store.get());
auto *replica_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(replica_store.get());
replica_mem_store->SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationServerConfig{});
ASSERT_FALSE(main_mem_store
->RegisterReplica("REPLICA", memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID,
memgraph::storage::replication::ReplicationClientConfig{})
.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 edgeRes = acc->CreateEdge(&v, &v, main_store->NameToEdgeType(edge_type));
ASSERT_TRUE(edgeRes.HasValue());
auto edge = edgeRes.GetValue();
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->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->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->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) {
std::unique_ptr<memgraph::storage::Storage> main_store{new memgraph::storage::InMemoryStorage(
{.durability = {
.storage_directory = storage_directory,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL,
}})};
auto *main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(main_store.get());
std::unique_ptr<memgraph::storage::Storage> replica_store1{new memgraph::storage::InMemoryStorage(
{.durability = {
.storage_directory = storage_directory,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL,
}})};
auto *replica_mem_store1 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store1.get());
replica_mem_store1->SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationServerConfig{});
std::unique_ptr<memgraph::storage::Storage> replica_store2{new memgraph::storage::InMemoryStorage(
{.durability = {
.storage_directory = storage_directory,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL,
}})};
auto *replica_mem_store2 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store2.get());
replica_mem_store2->SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[1]},
memgraph::storage::replication::ReplicationServerConfig{});
ASSERT_FALSE(main_mem_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,
memgraph::storage::replication::ReplicationClientConfig{})
.HasError());
ASSERT_FALSE(main_mem_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,
memgraph::storage::replication::ReplicationClientConfig{})
.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.get());
check_replica(replica_store2.get());
main_mem_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
{
std::unique_ptr<memgraph::storage::Storage> main_store{new memgraph::storage::InMemoryStorage(
{.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
std::unique_ptr<memgraph::storage::Storage> main_store{new memgraph::storage::InMemoryStorage(
{.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());
}
}
std::unique_ptr<memgraph::storage::Storage> main_store{new memgraph::storage::InMemoryStorage(
{.durability = {
.storage_directory = storage_directory,
.recover_on_startup = true,
.snapshot_wal_mode = memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL,
}})};
auto *main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(main_store.get());
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";
{
std::unique_ptr<memgraph::storage::Storage> replica_store{new memgraph::storage::InMemoryStorage(
{.durability = {.storage_directory = replica_storage_directory,
.snapshot_wal_mode =
memgraph::storage::Config::Durability::SnapshotWalMode::PERIODIC_SNAPSHOT_WITH_WAL}})};
auto *replica_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(replica_store.get());
replica_mem_store->SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationServerConfig{});
ASSERT_FALSE(main_mem_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,
memgraph::storage::replication::ReplicationClientConfig{})
.HasError());
ASSERT_EQ(main_mem_store->GetReplicaState(replicas[0]), memgraph::storage::replication::ReplicaState::RECOVERY);
while (main_mem_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());
}
}
{
std::unique_ptr<memgraph::storage::Storage> replica_store{new memgraph::storage::InMemoryStorage(
{.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) {
std::unique_ptr<memgraph::storage::Storage> main_store{new memgraph::storage::InMemoryStorage(configuration)};
auto *main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(main_store.get());
std::unique_ptr<memgraph::storage::Storage> replica_store_async{
new memgraph::storage::InMemoryStorage(configuration)};
auto *replica_mem_store_async = static_cast<memgraph::storage::InMemoryStorage *>(replica_store_async.get());
replica_mem_store_async->SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[1]},
memgraph::storage::replication::ReplicationServerConfig{});
ASSERT_FALSE(main_mem_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,
memgraph::storage::replication::ReplicationClientConfig{})
.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_mem_store->GetReplicaState("REPLICA_ASYNC"),
memgraph::storage::replication::ReplicaState::REPLICATING);
} else {
ASSERT_EQ(main_mem_store->GetReplicaState("REPLICA_ASYNC"),
memgraph::storage::replication::ReplicaState::RECOVERY);
}
}
while (main_mem_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) {
std::unique_ptr<memgraph::storage::Storage> main_store{new memgraph::storage::InMemoryStorage(configuration)};
std::unique_ptr<memgraph::storage::Storage> replica_store1{new memgraph::storage::InMemoryStorage(configuration)};
auto *main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(main_store.get());
auto *replica_mem_store1 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store1.get());
replica_mem_store1->SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationServerConfig{});
std::unique_ptr<memgraph::storage::Storage> replica_store2{new memgraph::storage::InMemoryStorage(configuration)};
auto *replica_mem_store2 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store2.get());
replica_mem_store2->SetReplicaRole(memgraph::io::network::Endpoint{local_host, 10001},
memgraph::storage::replication::ReplicationServerConfig{});
ASSERT_FALSE(main_mem_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,
memgraph::storage::replication::ReplicationClientConfig{})
.HasError());
ASSERT_FALSE(main_mem_store
->RegisterReplica(replicas[1], memgraph::io::network::Endpoint{local_host, 10001},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID,
memgraph::storage::replication::ReplicationClientConfig{})
.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_mem_store->UnregisterReplica(replicas[0]);
main_mem_store->UnregisterReplica(replicas[1]);
replica_mem_store1->SetMainReplicationRole();
ASSERT_FALSE(replica_mem_store1
->RegisterReplica(replicas[1], memgraph::io::network::Endpoint{local_host, 10001},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID,
memgraph::storage::replication::ReplicationClientConfig{})
.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_mem_store1->SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationServerConfig{});
ASSERT_TRUE(main_mem_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,
memgraph::storage::replication::ReplicationClientConfig{})
.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) {
std::unique_ptr<memgraph::storage::Storage> main_store{new memgraph::storage::InMemoryStorage(configuration)};
std::unique_ptr<memgraph::storage::Storage> replica_store1{new memgraph::storage::InMemoryStorage(configuration)};
auto *main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(main_store.get());
auto *replica_mem_store1 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store1.get());
const memgraph::io::network::Endpoint replica1_endpoint{local_host, 10001};
replica_mem_store1->SetReplicaRole(replica1_endpoint, memgraph::storage::replication::ReplicationServerConfig{});
const memgraph::io::network::Endpoint replica2_endpoint{local_host, 10002};
std::unique_ptr<memgraph::storage::Storage> replica_store2{new memgraph::storage::InMemoryStorage(configuration)};
auto *replica_mem_store2 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store2.get());
replica_mem_store2->SetReplicaRole(replica2_endpoint, memgraph::storage::replication::ReplicationServerConfig{});
const std::string replica1_name{replicas[0]};
ASSERT_FALSE(main_mem_store
->RegisterReplica(replica1_name, replica1_endpoint,
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID,
memgraph::storage::replication::ReplicationClientConfig{})
.HasError());
const std::string replica2_name{replicas[1]};
ASSERT_FALSE(main_mem_store
->RegisterReplica(replica2_name, replica2_endpoint,
memgraph::storage::replication::ReplicationMode::ASYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID,
memgraph::storage::replication::ReplicationClientConfig{})
.HasError());
ASSERT_EQ(main_mem_store->GetReplicationRole(), memgraph::storage::replication::ReplicationRole::MAIN);
ASSERT_EQ(replica_mem_store1->GetReplicationRole(), memgraph::storage::replication::ReplicationRole::REPLICA);
ASSERT_EQ(replica_mem_store2->GetReplicationRole(), memgraph::storage::replication::ReplicationRole::REPLICA);
const auto replicas_info = main_mem_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) {
std::unique_ptr<memgraph::storage::Storage> main_store{new memgraph::storage::InMemoryStorage(configuration)};
std::unique_ptr<memgraph::storage::Storage> replica_store1{new memgraph::storage::InMemoryStorage(configuration)};
auto *main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(main_store.get());
auto *replica_mem_store1 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store1.get());
const memgraph::io::network::Endpoint replica1_endpoint{local_host, 10001};
replica_mem_store1->SetReplicaRole(replica1_endpoint, memgraph::storage::replication::ReplicationServerConfig{});
const memgraph::io::network::Endpoint replica2_endpoint{local_host, 10002};
std::unique_ptr<memgraph::storage::Storage> replica_store2{new memgraph::storage::InMemoryStorage(configuration)};
auto *replica_mem_store2 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store2.get());
replica_mem_store2->SetReplicaRole(replica2_endpoint, memgraph::storage::replication::ReplicationServerConfig{});
const std::string replica1_name{replicas[0]};
ASSERT_FALSE(main_mem_store
->RegisterReplica(replica1_name, replica1_endpoint,
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID,
memgraph::storage::replication::ReplicationClientConfig{})
.HasError());
const std::string replica2_name{replicas[0]};
ASSERT_TRUE(main_mem_store
->RegisterReplica(replica2_name, replica2_endpoint,
memgraph::storage::replication::ReplicationMode::ASYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID,
memgraph::storage::replication::ReplicationClientConfig{})
.GetError() == memgraph::storage::ReplicationState::RegisterReplicaError::NAME_EXISTS);
}
TEST_F(ReplicationTest, ReplicationReplicaWithExistingEndPoint) {
std::unique_ptr<memgraph::storage::Storage> main_store{new memgraph::storage::InMemoryStorage(configuration)};
std::unique_ptr<memgraph::storage::Storage> replica_store1{new memgraph::storage::InMemoryStorage(configuration)};
auto *main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(main_store.get());
auto *replica_mem_store1 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store1.get());
const memgraph::io::network::Endpoint replica1_endpoint{local_host, 10001};
replica_mem_store1->SetReplicaRole(replica1_endpoint, memgraph::storage::replication::ReplicationServerConfig{});
std::unique_ptr<memgraph::storage::Storage> replica_store2{new memgraph::storage::InMemoryStorage(configuration)};
auto *replica_mem_store2 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store2.get());
const memgraph::io::network::Endpoint replica2_endpoint{local_host, 10001};
replica_mem_store2->SetReplicaRole(replica2_endpoint, memgraph::storage::replication::ReplicationServerConfig{});
const std::string replica1_name{replicas[0]};
ASSERT_FALSE(main_mem_store
->RegisterReplica(replica1_name, replica1_endpoint,
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID,
memgraph::storage::replication::ReplicationClientConfig{})
.HasError());
const std::string replica2_name{replicas[1]};
ASSERT_TRUE(main_mem_store
->RegisterReplica(replica2_name, replica2_endpoint,
memgraph::storage::replication::ReplicationMode::ASYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID,
memgraph::storage::replication::ReplicationClientConfig{})
.GetError() == memgraph::storage::ReplicationState::RegisterReplicaError::END_POINT_EXISTS);
}
TEST_F(ReplicationTest, RestoringReplicationAtStartupAfterDroppingReplica) {
auto main_config = configuration;
main_config.durability.restore_replication_state_on_startup = true;
std::unique_ptr<memgraph::storage::Storage> main_store{new memgraph::storage::InMemoryStorage(main_config)};
std::unique_ptr<memgraph::storage::Storage> replica_store1{new memgraph::storage::InMemoryStorage(configuration)};
auto *main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(main_store.get());
auto *replica_mem_store1 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store1.get());
replica_mem_store1->SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationServerConfig{});
std::unique_ptr<memgraph::storage::Storage> replica_store2{new memgraph::storage::InMemoryStorage(configuration)};
auto *replica_mem_store2 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store2.get());
replica_mem_store2->SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[1]},
memgraph::storage::replication::ReplicationServerConfig{});
auto res = main_mem_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,
memgraph::storage::replication::ReplicationClientConfig{});
ASSERT_FALSE(res.HasError());
res = main_mem_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,
memgraph::storage::replication::ReplicationClientConfig{});
ASSERT_FALSE(res.HasError());
auto replica_infos = main_mem_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();
std::unique_ptr<memgraph::storage::Storage> other_main_store{new memgraph::storage::InMemoryStorage(main_config)};
auto *other_main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(other_main_store.get());
replica_infos = other_main_mem_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_replication_state_on_startup = true;
std::unique_ptr<memgraph::storage::Storage> main_store{new memgraph::storage::InMemoryStorage(main_config)};
std::unique_ptr<memgraph::storage::Storage> replica_store1{new memgraph::storage::InMemoryStorage(configuration)};
auto *main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(main_store.get());
auto *replica_mem_store1 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store1.get());
replica_mem_store1->SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationServerConfig{});
std::unique_ptr<memgraph::storage::Storage> replica_store2{new memgraph::storage::InMemoryStorage(configuration)};
auto *replica_mem_store2 = static_cast<memgraph::storage::InMemoryStorage *>(replica_store2.get());
replica_mem_store2->SetReplicaRole(memgraph::io::network::Endpoint{local_host, ports[1]},
memgraph::storage::replication::ReplicationServerConfig{});
auto res = main_mem_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,
memgraph::storage::replication::ReplicationClientConfig{});
ASSERT_FALSE(res.HasError());
res = main_mem_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,
memgraph::storage::replication::ReplicationClientConfig{});
ASSERT_FALSE(res.HasError());
auto replica_infos = main_mem_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_mem_store->UnregisterReplica(replicas[0]);
ASSERT_TRUE(unregister_res);
replica_infos = main_mem_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();
std::unique_ptr<memgraph::storage::Storage> other_main_store{new memgraph::storage::InMemoryStorage(main_config)};
auto *other_main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(other_main_store.get());
replica_infos = other_main_mem_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) {
std::unique_ptr<memgraph::storage::Storage> main_store{new memgraph::storage::InMemoryStorage(configuration)};
auto *main_mem_store = static_cast<memgraph::storage::InMemoryStorage *>(main_store.get());
ASSERT_TRUE(main_mem_store
->RegisterReplica("REPLICA", memgraph::io::network::Endpoint{local_host, ports[0]},
memgraph::storage::replication::ReplicationMode::SYNC,
memgraph::storage::replication::RegistrationMode::MUST_BE_INSTANTLY_VALID,
memgraph::storage::replication::ReplicationClientConfig{})
.GetError() == memgraph::storage::ReplicationState::RegisterReplicaError::CONNECTION_FAILED);
}
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