ClickHouse/programs/benchmark/Benchmark.cpp
Azat Khuzhin a871036361
Fix parallel_reading_from_replicas with clickhouse-bechmark (#34751)
* Use INITIAL_QUERY for clickhouse-benchmark

Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>

* Fix parallel_reading_from_replicas with clickhouse-bechmark

Before it produces the following error:

    $ clickhouse-benchmark --stacktrace -i1 --query "select * from remote('127.1', default.data_mt) limit 10" --allow_experimental_parallel_reading_from_replicas=1 --max_parallel_replicas=3
    Loaded 1 queries.
    Logical error: 'Coordinator for parallel reading from replicas is not initialized'.
    Aborted (core dumped)

Since it uses the same code, i.e RemoteQueryExecutor ->
MultiplexedConnections, which enables coordinator if it was requested
from settings, but it should be done only for non-initial queries, i.e.
when server send connection to another server.

Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>

* Fix 02226_parallel_reading_from_replicas_benchmark for older shellcheck

By shellcheck 0.8 does not complains, while on CI shellcheck 0.7.0 and
it does complains [1]:

    In 02226_parallel_reading_from_replicas_benchmark.sh line 17:
        --allow_experimental_parallel_reading_from_replicas=1
        ^-- SC2191: The = here is literal. To assign by index, use ( [index]=value ) with no spaces. To keep as literal, quote it.

    Did you mean:
        "--allow_experimental_parallel_reading_from_replicas=1"

  [1]: https://s3.amazonaws.com/clickhouse-test-reports/34751/d883af711822faf294c876b017cbf745b1cda1b3/style_check__actions_/shellcheck_output.txt

Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
2022-03-08 16:42:29 +01:00

690 lines
24 KiB
C++

#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <signal.h>
#include <time.h>
#include <iostream>
#include <fstream>
#include <iomanip>
#include <random>
#include <pcg_random.hpp>
#include <Poco/Util/Application.h>
#include <Common/Stopwatch.h>
#include <Common/ThreadPool.h>
#include <AggregateFunctions/ReservoirSampler.h>
#include <AggregateFunctions/registerAggregateFunctions.h>
#include <boost/program_options.hpp>
#include <Common/ConcurrentBoundedQueue.h>
#include <Common/Exception.h>
#include <Common/randomSeed.h>
#include <Common/clearPasswordFromCommandLine.h>
#include <Core/Types.h>
#include <IO/ReadBufferFromFileDescriptor.h>
#include <IO/WriteBufferFromFileDescriptor.h>
#include <IO/WriteBufferFromFile.h>
#include <IO/ReadHelpers.h>
#include <IO/WriteHelpers.h>
#include <IO/Operators.h>
#include <IO/ConnectionTimeouts.h>
#include <IO/ConnectionTimeoutsContext.h>
#include <IO/UseSSL.h>
#include <QueryPipeline/RemoteQueryExecutor.h>
#include <Interpreters/Context.h>
#include <Client/Connection.h>
#include <Common/InterruptListener.h>
#include <Common/Config/configReadClient.h>
#include <Common/TerminalSize.h>
#include <Common/StudentTTest.h>
#include <filesystem>
namespace fs = std::filesystem;
/** A tool for evaluating ClickHouse performance.
* The tool emulates a case with fixed amount of simultaneously executing queries.
*/
namespace DB
{
using Ports = std::vector<UInt16>;
namespace ErrorCodes
{
extern const int CANNOT_BLOCK_SIGNAL;
extern const int EMPTY_DATA_PASSED;
}
class Benchmark : public Poco::Util::Application
{
public:
Benchmark(unsigned concurrency_, double delay_,
Strings && hosts_, Ports && ports_, bool round_robin_,
bool cumulative_, bool secure_, const String & default_database_,
const String & user_, const String & password_, const String & stage,
bool randomize_, size_t max_iterations_, double max_time_,
const String & json_path_, size_t confidence_,
const String & query_id_, const String & query_to_execute_, bool continue_on_errors_,
bool reconnect_, bool print_stacktrace_, const Settings & settings_)
:
round_robin(round_robin_), concurrency(concurrency_), delay(delay_), queue(concurrency), randomize(randomize_),
cumulative(cumulative_), max_iterations(max_iterations_), max_time(max_time_),
json_path(json_path_), confidence(confidence_), query_id(query_id_),
query_to_execute(query_to_execute_), continue_on_errors(continue_on_errors_), reconnect(reconnect_),
print_stacktrace(print_stacktrace_), settings(settings_),
shared_context(Context::createShared()), global_context(Context::createGlobal(shared_context.get())),
pool(concurrency)
{
const auto secure = secure_ ? Protocol::Secure::Enable : Protocol::Secure::Disable;
size_t connections_cnt = std::max(ports_.size(), hosts_.size());
connections.reserve(connections_cnt);
comparison_info_total.reserve(round_robin ? 1 : connections_cnt);
comparison_info_per_interval.reserve(round_robin ? 1 : connections_cnt);
for (size_t i = 0; i < connections_cnt; ++i)
{
UInt16 cur_port = i >= ports_.size() ? 9000 : ports_[i];
std::string cur_host = i >= hosts_.size() ? "localhost" : hosts_[i];
connections.emplace_back(std::make_unique<ConnectionPool>(
concurrency,
cur_host, cur_port,
default_database_, user_, password_,
/* cluster_= */ "",
/* cluster_secret_= */ "",
/* client_name_= */ "benchmark",
Protocol::Compression::Enable,
secure));
if (!round_robin || comparison_info_per_interval.empty())
{
comparison_info_per_interval.emplace_back(std::make_shared<Stats>());
comparison_info_total.emplace_back(std::make_shared<Stats>());
}
}
global_context->makeGlobalContext();
global_context->setSettings(settings);
std::cerr << std::fixed << std::setprecision(3);
/// This is needed to receive blocks with columns of AggregateFunction data type
/// (example: when using stage = 'with_mergeable_state')
registerAggregateFunctions();
query_processing_stage = QueryProcessingStage::fromString(stage);
}
void initialize(Poco::Util::Application & self [[maybe_unused]]) override
{
std::string home_path;
const char * home_path_cstr = getenv("HOME");
if (home_path_cstr)
home_path = home_path_cstr;
configReadClient(config(), home_path);
}
int main(const std::vector<std::string> &) override
{
if (!json_path.empty() && fs::exists(json_path)) /// Clear file with previous results
fs::remove(json_path);
readQueries();
runBenchmark();
return 0;
}
private:
using Entry = ConnectionPool::Entry;
using EntryPtr = std::shared_ptr<Entry>;
using EntryPtrs = std::vector<EntryPtr>;
bool round_robin;
unsigned concurrency;
double delay;
using Query = std::string;
using Queries = std::vector<Query>;
Queries queries;
using Queue = ConcurrentBoundedQueue<Query>;
Queue queue;
using ConnectionPoolUniq = std::unique_ptr<ConnectionPool>;
using ConnectionPoolUniqs = std::vector<ConnectionPoolUniq>;
ConnectionPoolUniqs connections;
bool randomize;
bool cumulative;
size_t max_iterations;
double max_time;
String json_path;
size_t confidence;
String query_id;
String query_to_execute;
bool continue_on_errors;
bool reconnect;
bool print_stacktrace;
const Settings & settings;
SharedContextHolder shared_context;
ContextMutablePtr global_context;
QueryProcessingStage::Enum query_processing_stage;
/// Don't execute new queries after timelimit or SIGINT or exception
std::atomic<bool> shutdown{false};
std::atomic<size_t> queries_executed{0};
struct Stats
{
std::atomic<size_t> queries{0};
size_t errors = 0;
size_t read_rows = 0;
size_t read_bytes = 0;
size_t result_rows = 0;
size_t result_bytes = 0;
double work_time = 0;
using Sampler = ReservoirSampler<double>;
Sampler sampler {1 << 16};
void add(double seconds, size_t read_rows_inc, size_t read_bytes_inc, size_t result_rows_inc, size_t result_bytes_inc)
{
++queries;
work_time += seconds;
read_rows += read_rows_inc;
read_bytes += read_bytes_inc;
result_rows += result_rows_inc;
result_bytes += result_bytes_inc;
sampler.insert(seconds);
}
void clear()
{
queries = 0;
work_time = 0;
read_rows = 0;
read_bytes = 0;
result_rows = 0;
result_bytes = 0;
sampler.clear();
}
};
using MultiStats = std::vector<std::shared_ptr<Stats>>;
MultiStats comparison_info_per_interval;
MultiStats comparison_info_total;
StudentTTest t_test;
Stopwatch total_watch;
Stopwatch delay_watch;
std::mutex mutex;
ThreadPool pool;
void readQueries()
{
if (query_to_execute.empty())
{
ReadBufferFromFileDescriptor in(STDIN_FILENO);
while (!in.eof())
{
String query;
readText(query, in);
assertChar('\n', in);
if (!query.empty())
queries.emplace_back(std::move(query));
}
if (queries.empty())
throw Exception("Empty list of queries.", ErrorCodes::EMPTY_DATA_PASSED);
}
else
{
queries.emplace_back(query_to_execute);
}
std::cerr << "Loaded " << queries.size() << " queries.\n";
}
void printNumberOfQueriesExecuted(size_t num)
{
std::cerr << "\nQueries executed: " << num;
if (queries.size() > 1)
std::cerr << " (" << (num * 100.0 / queries.size()) << "%)";
std::cerr << ".\n";
}
/// Try push new query and check cancellation conditions
bool tryPushQueryInteractively(const String & query, InterruptListener & interrupt_listener)
{
bool inserted = false;
while (!inserted)
{
inserted = queue.tryPush(query, 100);
if (shutdown)
{
/// An exception occurred in a worker
return false;
}
if (max_time > 0 && total_watch.elapsedSeconds() >= max_time)
{
std::cout << "Stopping launch of queries."
<< " Requested time limit " << max_time << " seconds is exhausted.\n";
return false;
}
if (interrupt_listener.check())
{
std::cout << "Stopping launch of queries. SIGINT received." << std::endl;
return false;
}
if (delay > 0 && delay_watch.elapsedSeconds() > delay)
{
printNumberOfQueriesExecuted(queries_executed);
cumulative ? report(comparison_info_total) : report(comparison_info_per_interval);
delay_watch.restart();
}
}
return true;
}
void runBenchmark()
{
pcg64 generator(randomSeed());
std::uniform_int_distribution<size_t> distribution(0, queries.size() - 1);
try
{
for (size_t i = 0; i < concurrency; ++i)
{
EntryPtrs connection_entries;
connection_entries.reserve(connections.size());
for (const auto & connection : connections)
connection_entries.emplace_back(std::make_shared<Entry>(
connection->get(ConnectionTimeouts::getTCPTimeoutsWithoutFailover(settings))));
pool.scheduleOrThrowOnError([this, connection_entries]() mutable { thread(connection_entries); });
}
}
catch (...)
{
shutdown = true;
pool.wait();
throw;
}
InterruptListener interrupt_listener;
delay_watch.restart();
/// Push queries into queue
for (size_t i = 0; !max_iterations || i < max_iterations; ++i)
{
size_t query_index = randomize ? distribution(generator) : i % queries.size();
if (!tryPushQueryInteractively(queries[query_index], interrupt_listener))
{
shutdown = true;
break;
}
}
/// Now we don't block the Ctrl+C signal and second signal will terminate the program without waiting.
interrupt_listener.unblock();
pool.wait();
total_watch.stop();
if (!json_path.empty())
reportJSON(comparison_info_total, json_path);
printNumberOfQueriesExecuted(queries_executed);
report(comparison_info_total);
}
void thread(EntryPtrs & connection_entries)
{
Query query;
/// Randomly choosing connection index
pcg64 generator(randomSeed());
std::uniform_int_distribution<size_t> distribution(0, connection_entries.size() - 1);
/// In these threads we do not accept INT signal.
sigset_t sig_set;
if (sigemptyset(&sig_set)
|| sigaddset(&sig_set, SIGINT)
|| pthread_sigmask(SIG_BLOCK, &sig_set, nullptr))
{
throwFromErrno("Cannot block signal.", ErrorCodes::CANNOT_BLOCK_SIGNAL);
}
while (true)
{
bool extracted = false;
while (!extracted)
{
extracted = queue.tryPop(query, 100);
if (shutdown || (max_iterations && queries_executed == max_iterations))
{
return;
}
}
const auto connection_index = distribution(generator);
try
{
execute(connection_entries, query, connection_index);
}
catch (...)
{
std::lock_guard lock(mutex);
std::cerr << "An error occurred while processing the query " << "'" << query << "'"
<< ": " << getCurrentExceptionMessage(false) << std::endl;
if (!continue_on_errors)
{
shutdown = true;
throw;
}
else
{
std::cerr << getCurrentExceptionMessage(print_stacktrace,
true /*check embedded stack trace*/) << std::endl;
size_t info_index = round_robin ? 0 : connection_index;
comparison_info_per_interval[info_index]->errors++;
comparison_info_total[info_index]->errors++;
}
}
// Count failed queries toward executed, so that we'd reach
// max_iterations even if every run fails.
++queries_executed;
}
}
void execute(EntryPtrs & connection_entries, Query & query, size_t connection_index)
{
Stopwatch watch;
Connection & connection = **connection_entries[connection_index];
if (reconnect)
connection.disconnect();
RemoteQueryExecutor executor(
connection, query, {}, global_context, nullptr, Scalars(), Tables(), query_processing_stage);
if (!query_id.empty())
executor.setQueryId(query_id);
Progress progress;
executor.setProgressCallback([&progress](const Progress & value) { progress.incrementPiecewiseAtomically(value); });
executor.sendQuery(ClientInfo::QueryKind::INITIAL_QUERY);
ProfileInfo info;
while (Block block = executor.read())
info.update(block);
executor.finish();
double seconds = watch.elapsedSeconds();
std::lock_guard lock(mutex);
size_t info_index = round_robin ? 0 : connection_index;
comparison_info_per_interval[info_index]->add(seconds, progress.read_rows, progress.read_bytes, info.rows, info.bytes);
comparison_info_total[info_index]->add(seconds, progress.read_rows, progress.read_bytes, info.rows, info.bytes);
t_test.add(info_index, seconds);
}
void report(MultiStats & infos)
{
std::lock_guard lock(mutex);
std::cerr << "\n";
for (size_t i = 0; i < infos.size(); ++i)
{
const auto & info = infos[i];
/// Avoid zeros, nans or exceptions
if (0 == info->queries)
return;
double seconds = info->work_time / concurrency;
std::string connection_description = connections[i]->getDescription();
if (round_robin)
{
connection_description.clear();
for (const auto & conn : connections)
{
if (!connection_description.empty())
connection_description += ", ";
connection_description += conn->getDescription();
}
}
std::cerr
<< connection_description << ", "
<< "queries " << info->queries << ", ";
if (info->errors)
{
std::cerr << "errors " << info->errors << ", ";
}
std::cerr
<< "QPS: " << (info->queries / seconds) << ", "
<< "RPS: " << (info->read_rows / seconds) << ", "
<< "MiB/s: " << (info->read_bytes / seconds / 1048576) << ", "
<< "result RPS: " << (info->result_rows / seconds) << ", "
<< "result MiB/s: " << (info->result_bytes / seconds / 1048576) << "."
<< "\n";
}
std::cerr << "\n";
auto print_percentile = [&](double percent)
{
std::cerr << percent << "%\t\t";
for (const auto & info : infos)
{
std::cerr << info->sampler.quantileNearest(percent / 100.0) << " sec.\t";
}
std::cerr << "\n";
};
for (int percent = 0; percent <= 90; percent += 10)
print_percentile(percent);
print_percentile(95);
print_percentile(99);
print_percentile(99.9);
print_percentile(99.99);
std::cerr << "\n" << t_test.compareAndReport(confidence).second << "\n";
if (!cumulative)
{
for (auto & info : infos)
info->clear();
}
}
void reportJSON(MultiStats & infos, const std::string & filename)
{
WriteBufferFromFile json_out(filename);
std::lock_guard lock(mutex);
auto print_key_value = [&](auto key, auto value, bool with_comma = true)
{
json_out << double_quote << key << ": " << value << (with_comma ? ",\n" : "\n");
};
auto print_percentile = [&json_out](Stats & info, auto percent, bool with_comma = true)
{
json_out << "\"" << percent << "\": " << info.sampler.quantileNearest(percent / 100.0) << (with_comma ? ",\n" : "\n");
};
json_out << "{\n";
for (size_t i = 0; i < infos.size(); ++i)
{
const auto & info = infos[i];
json_out << double_quote << connections[i]->getDescription() << ": {\n";
json_out << double_quote << "statistics" << ": {\n";
print_key_value("QPS", info->queries / info->work_time);
print_key_value("RPS", info->read_rows / info->work_time);
print_key_value("MiBPS", info->read_bytes / info->work_time);
print_key_value("RPS_result", info->result_rows / info->work_time);
print_key_value("MiBPS_result", info->result_bytes / info->work_time);
print_key_value("num_queries", info->queries.load());
print_key_value("num_errors", info->errors, false);
json_out << "},\n";
json_out << double_quote << "query_time_percentiles" << ": {\n";
if (info->queries != 0)
{
for (int percent = 0; percent <= 90; percent += 10)
print_percentile(*info, percent);
print_percentile(*info, 95);
print_percentile(*info, 99);
print_percentile(*info, 99.9);
print_percentile(*info, 99.99, false);
}
json_out << "}\n";
json_out << (i == infos.size() - 1 ? "}\n" : "},\n");
}
json_out << "}\n";
}
public:
~Benchmark() override
{
shutdown = true;
}
};
}
#ifndef __clang__
#pragma GCC optimize("-fno-var-tracking-assignments")
#endif
int mainEntryClickHouseBenchmark(int argc, char ** argv)
{
using namespace DB;
bool print_stacktrace = true;
try
{
using boost::program_options::value;
boost::program_options::options_description desc = createOptionsDescription("Allowed options", getTerminalWidth());
desc.add_options()
("help", "produce help message")
("query", value<std::string>()->default_value(""), "query to execute")
("concurrency,c", value<unsigned>()->default_value(1), "number of parallel queries")
("delay,d", value<double>()->default_value(1), "delay between intermediate reports in seconds (set 0 to disable reports)")
("stage", value<std::string>()->default_value("complete"), "request query processing up to specified stage: complete,fetch_columns,with_mergeable_state,with_mergeable_state_after_aggregation,with_mergeable_state_after_aggregation_and_limit")
("iterations,i", value<size_t>()->default_value(0), "amount of queries to be executed")
("timelimit,t", value<double>()->default_value(0.), "stop launch of queries after specified time limit")
("randomize,r", value<bool>()->default_value(false), "randomize order of execution")
("json", value<std::string>()->default_value(""), "write final report to specified file in JSON format")
("host,h", value<Strings>()->multitoken(), "list of hosts")
("port,p", value<Ports>()->multitoken(), "list of ports")
("roundrobin", "Instead of comparing queries for different --host/--port just pick one random --host/--port for every query and send query to it.")
("cumulative", "prints cumulative data instead of data per interval")
("secure,s", "Use TLS connection")
("user", value<std::string>()->default_value("default"), "")
("password", value<std::string>()->default_value(""), "")
("database", value<std::string>()->default_value("default"), "")
("stacktrace", "print stack traces of exceptions")
("confidence", value<size_t>()->default_value(5), "set the level of confidence for T-test [0=80%, 1=90%, 2=95%, 3=98%, 4=99%, 5=99.5%(default)")
("query_id", value<std::string>()->default_value(""), "")
("continue_on_errors", "continue testing even if a query fails")
("reconnect", "establish new connection for every query")
;
Settings settings;
settings.addProgramOptions(desc);
boost::program_options::variables_map options;
boost::program_options::store(boost::program_options::parse_command_line(argc, argv, desc), options);
boost::program_options::notify(options);
clearPasswordFromCommandLine(argc, argv);
if (options.count("help"))
{
std::cout << "Usage: " << argv[0] << " [options] < queries.txt\n";
std::cout << desc << "\n";
return 1;
}
print_stacktrace = options.count("stacktrace");
/// NOTE Maybe clickhouse-benchmark should also respect .xml configuration of clickhouse-client.
UInt16 default_port = options.count("secure") ? DBMS_DEFAULT_SECURE_PORT : DBMS_DEFAULT_PORT;
UseSSL use_ssl;
Ports ports = options.count("port")
? options["port"].as<Ports>()
: Ports({default_port});
Strings hosts = options.count("host") ? options["host"].as<Strings>() : Strings({"localhost"});
Benchmark benchmark(
options["concurrency"].as<unsigned>(),
options["delay"].as<double>(),
std::move(hosts),
std::move(ports),
options.count("roundrobin"),
options.count("cumulative"),
options.count("secure"),
options["database"].as<std::string>(),
options["user"].as<std::string>(),
options["password"].as<std::string>(),
options["stage"].as<std::string>(),
options["randomize"].as<bool>(),
options["iterations"].as<size_t>(),
options["timelimit"].as<double>(),
options["json"].as<std::string>(),
options["confidence"].as<size_t>(),
options["query_id"].as<std::string>(),
options["query"].as<std::string>(),
options.count("continue_on_errors"),
options.count("reconnect"),
print_stacktrace,
settings);
return benchmark.run();
}
catch (...)
{
std::cerr << getCurrentExceptionMessage(print_stacktrace, true) << std::endl;
return getCurrentExceptionCode();
}
}