ClickHouse/utils/keeper-bench/Generator.cpp

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#include "Generator.h"
#include <random>
#include <filesystem>
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using namespace Coordination;
using namespace zkutil;
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namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
}
}
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namespace
{
std::string generateRandomString(size_t length)
{
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if (length == 0)
return "";
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static const auto & chars = "0123456789"
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"abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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static pcg64 rng(randomSeed());
static std::uniform_int_distribution<size_t> pick(0, sizeof(chars) - 2);
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std::string s;
s.reserve(length);
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while (length--)
s += chars[pick(rng)];
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return s;
}
}
std::string generateRandomPath(const std::string & prefix, size_t length)
{
return std::filesystem::path(prefix) / generateRandomString(length);
}
std::string generateRandomData(size_t size)
{
return generateRandomString(size);
}
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void CreateRequestGenerator::startup(Coordination::ZooKeeper & zookeeper)
{
auto promise = std::make_shared<std::promise<void>>();
auto future = promise->get_future();
auto create_callback = [promise] (const CreateResponse & response)
{
if (response.error != Coordination::Error::ZOK)
promise->set_exception(std::make_exception_ptr(zkutil::KeeperException(response.error)));
else
promise->set_value();
};
zookeeper.create(path_prefix, "", false, false, default_acls, create_callback);
future.get();
}
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ZooKeeperRequestPtr CreateRequestGenerator::generate()
{
auto request = std::make_shared<ZooKeeperCreateRequest>();
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request->acls = default_acls;
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size_t plength = 5;
if (path_length)
plength = *path_length;
auto path_candidate = generateRandomPath(path_prefix, plength);
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while (paths_created.count(path_candidate))
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path_candidate = generateRandomPath(path_prefix, plength);
paths_created.insert(path_candidate);
request->path = path_candidate;
if (data_size)
request->data = generateRandomData(*data_size);
return request;
}
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void GetRequestGenerator::startup(Coordination::ZooKeeper & zookeeper)
{
auto promise = std::make_shared<std::promise<void>>();
auto future = promise->get_future();
auto create_callback = [promise] (const CreateResponse & response)
{
if (response.error != Coordination::Error::ZOK)
promise->set_exception(std::make_exception_ptr(zkutil::KeeperException(response.error)));
else
promise->set_value();
};
zookeeper.create(path_prefix, "", false, false, default_acls, create_callback);
future.get();
size_t total_nodes = 1;
if (num_nodes)
total_nodes = *num_nodes;
for (size_t i = 0; i < total_nodes; ++i)
{
auto path = generateRandomPath(path_prefix, 5);
while (std::find(paths_to_get.begin(), paths_to_get.end(), path) != paths_to_get.end())
path = generateRandomPath(path_prefix, 5);
auto create_promise = std::make_shared<std::promise<void>>();
auto create_future = create_promise->get_future();
auto callback = [create_promise] (const CreateResponse & response)
{
if (response.error != Coordination::Error::ZOK)
create_promise->set_exception(std::make_exception_ptr(zkutil::KeeperException(response.error)));
else
create_promise->set_value();
};
std::string data;
if (nodes_data_size)
data = generateRandomString(*nodes_data_size);
zookeeper.create(path, data, false, false, default_acls, callback);
create_future.get();
paths_to_get.push_back(path);
}
}
Coordination::ZooKeeperRequestPtr GetRequestGenerator::generate()
{
auto request = std::make_shared<ZooKeeperGetRequest>();
size_t path_index = distribution(rng);
request->path = paths_to_get[path_index];
return request;
}
void ListRequestGenerator::startup(Coordination::ZooKeeper & zookeeper)
{
auto promise = std::make_shared<std::promise<void>>();
auto future = promise->get_future();
auto create_callback = [promise] (const CreateResponse & response)
{
if (response.error != Coordination::Error::ZOK)
promise->set_exception(std::make_exception_ptr(zkutil::KeeperException(response.error)));
else
promise->set_value();
};
zookeeper.create(path_prefix, "", false, false, default_acls, create_callback);
future.get();
size_t total_nodes = 1;
if (num_nodes)
total_nodes = *num_nodes;
size_t path_length = 5;
if (paths_length)
path_length = *paths_length;
for (size_t i = 0; i < total_nodes; ++i)
{
auto path = generateRandomPath(path_prefix, path_length);
auto create_promise = std::make_shared<std::promise<void>>();
auto create_future = create_promise->get_future();
auto callback = [create_promise] (const CreateResponse & response)
{
if (response.error != Coordination::Error::ZOK)
create_promise->set_exception(std::make_exception_ptr(zkutil::KeeperException(response.error)));
else
create_promise->set_value();
};
zookeeper.create(path, "", false, false, default_acls, callback);
create_future.get();
}
}
Coordination::ZooKeeperRequestPtr ListRequestGenerator::generate()
{
auto request = std::make_shared<ZooKeeperListRequest>();
request->path = path_prefix;
return request;
}
std::unique_ptr<IGenerator> getGenerator(const std::string & name)
{
if (name == "create_no_data")
{
return std::make_unique<CreateRequestGenerator>();
}
else if (name == "create_small_data")
{
return std::make_unique<CreateRequestGenerator>("/create_generator", 5, 32);
}
else if (name == "create_medium_data")
{
return std::make_unique<CreateRequestGenerator>("/create_generator", 5, 1024);
}
else if (name == "create_big_data")
{
return std::make_unique<CreateRequestGenerator>("/create_generator", 5, 512 * 1024);
}
else if (name == "get_no_data")
{
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return std::make_unique<GetRequestGenerator>("/get_generator", 10, 0);
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}
else if (name == "get_small_data")
{
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return std::make_unique<GetRequestGenerator>("/get_generator", 10, 32);
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}
else if (name == "get_medium_data")
{
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return std::make_unique<GetRequestGenerator>("/get_generator", 10, 1024);
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}
else if (name == "get_big_data")
{
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return std::make_unique<GetRequestGenerator>("/get_generator", 10, 512 * 1024);
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}
else if (name == "list_no_nodes")
{
return std::make_unique<ListRequestGenerator>("/list_generator", 0, 1);
}
else if (name == "list_few_nodes")
{
return std::make_unique<ListRequestGenerator>("/list_generator", 10, 5);
}
else if (name == "list_medium_nodes")
{
return std::make_unique<ListRequestGenerator>("/list_generator", 1000, 5);
}
else if (name == "list_a_lot_nodes")
{
return std::make_unique<ListRequestGenerator>("/list_generator", 100000, 5);
}
throw DB::Exception(DB::ErrorCodes::LOGICAL_ERROR, "Unknown generator {}", name);
}