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/*
* Copyright (C) 2018 Codership Oy <info@codership.com>
*
* This file is part of wsrep-lib.
*
* Wsrep-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* Wsrep-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wsrep-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#include "db_simulator.hpp"
#include "db_client.hpp"
#include "db_threads.hpp"
#include "db_tls.hpp"
#include "wsrep/logger.hpp"
#include <boost/filesystem.hpp>
#include <sstream>
static db::ti thread_instrumentation;
static db::tls tls_service;
void db::simulator::run()
{
start();
stop();
std::flush(std::cerr);
std::cout << "Results:\n";
std::cout << stats() << std::endl;
std::cout << db::ti::stats() << std::endl;
std::cout << db::tls::stats() << std::endl;
}
void db::simulator::sst(db::server& server,
const std::string& request,
const wsrep::gtid& gtid,
bool bypass)
{
// The request may contain extra trailing '\0' after it goes
// through the provider, strip it first.
std::string name(request);
name.erase(std::find(name.begin(), name.end(), '\0'), name.end());
wsrep::unique_lock<wsrep::mutex> lock(mutex_);
auto i(servers_.find(name));
wsrep::log_info() << "SST request '" << name << "'";
if (i == servers_.end())
{
wsrep::log_error() << "Server " << request << " not found";
wsrep::log_info() << "servers:";
for (const auto& s : servers_)
{
wsrep::log_info() << "server: " << s.first;
}
throw wsrep::runtime_error("Server " + request + " not found");
}
if (bypass == false)
{
wsrep::log_info() << "SST "
<< server.server_state().name()
<< " -> " << request;
i->second->storage_engine().store_position(gtid);
i->second->storage_engine().store_view(
server.storage_engine().get_view());
}
db::client dummy(*(i->second), wsrep::client_id(-1),
wsrep::client_state::m_local, params());
i->second->server_state().sst_received(dummy.client_service(), 0);
server.server_state().sst_sent(gtid, 0);
}
std::string db::simulator::stats() const
{
auto duration(std::chrono::duration<double>(
clients_stop_ - clients_start_).count());
long long transactions(stats_.commits + stats_.rollbacks);
long long bf_aborts(0);
for (const auto& s : servers_)
{
bf_aborts += s.second->storage_engine().bf_aborts();
}
std::ostringstream os;
os << "Number of transactions: " << transactions
<< "\n"
<< "Seconds: " << duration
<< " \n"
<< "Transactions per second: " << double(transactions)/double(duration)
<< "\n"
<< "BF aborts: "
<< bf_aborts
<< "\n"
<< "Client commits: " << stats_.commits
<< "\n"
<< "Client rollbacks: " << stats_.rollbacks
<< "\n"
<< "Client replays: " << stats_.replays;
return os.str();
}
////////////////////////////////////////////////////////////////////////////////
// Private //
////////////////////////////////////////////////////////////////////////////////
void db::simulator::start()
{
thread_instrumentation.level(params_.thread_instrumentation);
thread_instrumentation.cond_checks(params_.cond_checks);
tls_service.init(params_.tls_service);
wsrep::log_info() << "Provider: " << params_.wsrep_provider;
std::string cluster_address(build_cluster_address());
wsrep::log_info() << "Cluster address: " << cluster_address;
for (size_t i(0); i < params_.n_servers; ++i)
{
std::ostringstream name_os;
name_os << (i + 1);
std::ostringstream id_os;
id_os << (i + 1);
std::ostringstream address_os;
address_os << "127.0.0.1:" << server_port(i);
wsrep::id server_id(id_os.str());
auto it(servers_.insert(
std::make_pair(
name_os.str(),
std::make_unique<db::server>(
*this,
name_os.str(),
address_os.str()))));
if (it.second == false)
{
throw wsrep::runtime_error("Failed to add server");
}
boost::filesystem::path dir("dbsim_" + id_os.str() + "_data");
boost::filesystem::create_directory(dir);
db::server& server(*it.first->second);
server.server_state().debug_log_level(params_.debug_log_level);
std::string server_options(params_.wsrep_provider_options);
wsrep::provider::services services;
services.thread_service = params_.thread_instrumentation
? &thread_instrumentation
: nullptr;
services.tls_service = params_.tls_service
? &tls_service
: nullptr;
if (server.server_state().load_provider(params_.wsrep_provider,
server_options, services))
{
throw wsrep::runtime_error("Failed to load provider");
}
if (server.server_state().connect("sim_cluster", cluster_address, "",
i == 0))
{
throw wsrep::runtime_error("Failed to connect");
}
wsrep::log_debug() << "main: Starting applier";
server.start_applier();
wsrep::log_debug() << "main: Waiting initializing state";
server.server_state().wait_until_state(wsrep::server_state::s_initializing);
wsrep::log_debug() << "main: Calling initialized";
server.server_state().initialized();
wsrep::log_debug() << "main: Waiting for synced state";
server.server_state().wait_until_state(
wsrep::server_state::s_synced);
wsrep::log_debug() << "main: Server synced";
}
// Start client threads
wsrep::log_info() << "####################### Starting client load";
clients_start_ = std::chrono::steady_clock::now();
size_t index(0);
for (auto& i : servers_)
{
if (params_.topology.size() == 0 || params_.topology[index] == 'm')
{
i.second->start_clients();
}
++index;
}
}
void db::simulator::stop()
{
for (auto& i : servers_)
{
db::server& server(*i.second);
server.stop_clients();
}
clients_stop_ = std::chrono::steady_clock::now();
wsrep::log_info() << "######## Stats ############";
wsrep::log_info() << stats();
std::cout << db::ti::stats() << std::endl;
wsrep::log_info() << "######## Stats ############";
if (params_.fast_exit)
{
exit(0);
}
for (auto& i : servers_)
{
db::server& server(*i.second);
wsrep::log_info() << "Status for server: "
<< server.server_state().id();
auto status(server.server_state().provider().status());
for_each(status.begin(), status.end(),
[](const wsrep::provider::status_variable& sv)
{
wsrep::log_info() << sv.name() << " = " << sv.value();
});
server.server_state().disconnect();
server.server_state().wait_until_state(
wsrep::server_state::s_disconnected);
server.stop_applier();
server.server_state().unload_provider();
}
}
std::string db::simulator::server_port(size_t i) const
{
std::ostringstream os;
os << (10000 + (i + 1)*10);
return os.str();
}
std::string db::simulator::build_cluster_address() const
{
std::string ret;
if (params_.wsrep_provider.find("galera_smm") != std::string::npos)
{
ret += "gcomm://";
}
for (size_t i(0); i < params_.n_servers; ++i)
{
std::ostringstream sa_os;
sa_os << "127.0.0.1:";
sa_os << server_port(i);
ret += sa_os.str();
if (i < params_.n_servers - 1) ret += ",";
}
return ret;
}
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