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scylladb/tests/perf/perf_fast_forward.cc

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/*
* Copyright (C) 2017 ScyllaDB
*/
/*
* This file is part of Scylla.
*
* Scylla is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Scylla 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 Scylla. If not, see <http://www.gnu.org/licenses/>.
*/
#include <boost/range/irange.hpp>
#include "tests/cql_test_env.hh"
#include "tests/perf/perf.hh"
#include "core/app-template.hh"
#include "schema_builder.hh"
#include "database.hh"
#include "db/config.hh"
#include "partition_slice_builder.hh"
#include <seastar/core/reactor.hh>
#include "transport/messages/result_message.hh"
#include "disk-error-handler.hh"
thread_local disk_error_signal_type commit_error;
thread_local disk_error_signal_type general_disk_error;
using namespace std::chrono_literals;
reactor::io_stats s;
struct metrics_snapshot {
std::chrono::high_resolution_clock::time_point hr_clock;
steady_clock_type::duration busy_time;
steady_clock_type::duration idle_time;
reactor::io_stats io;
sstables::shared_index_lists::stats index;
metrics_snapshot() {
reactor& r = *local_engine;
io = r.get_io_stats();
busy_time = r.total_busy_time();
idle_time = r.total_idle_time();
hr_clock = std::chrono::high_resolution_clock::now();
index = sstables::shared_index_lists::shard_stats();
}
};
class make_printable {
using func_type = std::function<void(std::ostream&)>;
func_type _func;
public:
make_printable(func_type func) : _func(std::move(func)) {}
friend std::ostream& operator<<(std::ostream& out, const make_printable& p) {
p._func(out);
return out;
}
};
struct test_result {
uint64_t fragments_read;
metrics_snapshot before;
metrics_snapshot after;
test_result(metrics_snapshot before, uint64_t fragments_read)
: fragments_read(fragments_read)
, before(before)
{ }
double duration_in_seconds() const {
return std::chrono::duration<double>(after.hr_clock - before.hr_clock).count();
}
double fragment_rate() const { return double(fragments_read) / duration_in_seconds(); }
uint64_t aio_reads() const { return after.io.aio_reads - before.io.aio_reads; }
uint64_t aio_read_bytes() const { return after.io.aio_read_bytes - before.io.aio_read_bytes; }
uint64_t read_aheads_discarded() const { return after.io.fstream_read_aheads_discarded - before.io.fstream_read_aheads_discarded; }
uint64_t reads_blocked() const { return after.io.fstream_reads_blocked - before.io.fstream_reads_blocked; }
uint64_t index_hits() const { return after.index.hits - before.index.hits; }
uint64_t index_misses() const { return after.index.misses - before.index.misses; }
uint64_t index_blocks() const { return after.index.blocks - before.index.blocks; }
float cpu_utilization() const {
auto busy_delta = after.busy_time.count() - before.busy_time.count();
auto idle_delta = after.idle_time.count() - before.idle_time.count();
return float(busy_delta) / (busy_delta + idle_delta);
}
static auto table_header() {
return make_printable([] (std::ostream& out) {
out << sprint("%10s %9s %10s %6s %10s %7s %7s %8s %8s %8s %6s",
"time [s]", "frags", "frag/s", "aio", "[KiB]", "blocked", "dropped",
"idx hit", "idx miss", "idx blk", "cpu");
});
}
auto table_row() {
return make_printable([this] (std::ostream& out) {
out << sprint("%10.6f %9d %10.0f %6d %10d %7d %7d %8d %8d %8d %5.1f%%",
duration_in_seconds(), fragments_read, fragment_rate(),
aio_reads(), aio_read_bytes() / 1024, reads_blocked(), read_aheads_discarded(),
index_hits(), index_misses(), index_blocks(),
cpu_utilization() * 100);
});
}
};
static
uint64_t consume_all(streamed_mutation& sm) {
uint64_t fragments = 0;
while (1) {
mutation_fragment_opt mfo = sm().get0();
if (!mfo) {
break;
}
++fragments;
}
return fragments;
}
static
uint64_t consume_all(mutation_reader& rd) {
uint64_t fragments = 0;
while (1) {
streamed_mutation_opt smo = rd().get0();
if (!smo) {
break;
}
fragments += consume_all(*smo);
}
return fragments;
}
// cf should belong to ks.test
static test_result scan_rows_with_stride(column_family& cf, int n_rows, int n_read = 1, int n_skip = 0) {
auto rd = cf.make_reader(cf.schema(),
query::full_partition_range,
query::full_slice,
default_priority_class(),
nullptr,
n_skip ? streamed_mutation::forwarding::yes : streamed_mutation::forwarding::no);
metrics_snapshot before;
streamed_mutation_opt smo = rd().get0();
assert(smo);
streamed_mutation& sm = *smo;
uint64_t fragments = 0;
int ck = 0;
while (ck < n_rows) {
if (n_skip) {
sm.fast_forward_to(position_range(
position_in_partition(position_in_partition::clustering_row_tag_t(), clustering_key::from_singular(*cf.schema(), ck)),
position_in_partition(position_in_partition::clustering_row_tag_t(), clustering_key::from_singular(*cf.schema(), ck + n_read))
)).get();
}
fragments += consume_all(sm);
ck += n_read + n_skip;
}
return {before, fragments};
}
static dht::decorated_key make_pkey(const schema& s, int n) {
return dht::global_partitioner().decorate_key(s, partition_key::from_singular(s, n));
}
std::vector<dht::decorated_key> make_pkeys(schema_ptr s, int n) {
std::vector<dht::decorated_key> keys;
for (int i = 0; i < n; ++i) {
keys.push_back(make_pkey(*s, i));
}
std::sort(keys.begin(), keys.end(), dht::decorated_key::less_comparator(s));
return keys;
}
static test_result scan_with_stride_partitions(column_family& cf, int n, int n_read = 1, int n_skip = 0) {
auto keys = make_pkeys(cf.schema(), n + n_read);
int pk = 0;
auto rd = cf.make_reader(cf.schema(),
n_skip ? dht::partition_range::make_ending_with(dht::partition_range::bound(keys[0], false)) // covering none
: query::full_partition_range,
query::full_slice);
metrics_snapshot before;
uint64_t fragments = 0;
while (pk < n) {
// FIXME: fast_forward_to() cannot be called on a reader from which nothing was read yet.
if (pk && n_skip) {
rd.fast_forward_to(dht::partition_range(
dht::partition_range::bound(keys[pk], true),
dht::partition_range::bound(keys[pk + n_read], false)
)).get();
}
fragments += consume_all(rd);
pk += n_read + n_skip;
}
return {before, fragments};
}
static test_result slice_rows(column_family& cf, int offset = 0, int n_read = 1) {
auto rd = cf.make_reader(cf.schema(),
query::full_partition_range,
query::full_slice,
default_priority_class(),
nullptr,
streamed_mutation::forwarding::yes);
metrics_snapshot before;
streamed_mutation_opt smo = rd().get0();
assert(smo);
streamed_mutation& sm = *smo;
sm.fast_forward_to(position_range(
position_in_partition::for_key(clustering_key::from_singular(*cf.schema(), offset)),
position_in_partition::for_key(clustering_key::from_singular(*cf.schema(), offset + n_read)))).get();
uint64_t fragments = consume_all(sm);
fragments += consume_all(rd);
return {before, fragments};
}
// cf is for ks.small_part
static test_result slice_partitions(column_family& cf, int n, int offset = 0, int n_read = 1) {
auto keys = make_pkeys(cf.schema(), n + n_read);
auto pr = dht::partition_range(
dht::partition_range::bound(keys[offset], true),
dht::partition_range::bound(keys[offset + n_read], false)
);
auto rd = cf.make_reader(cf.schema(), pr, query::full_slice);
metrics_snapshot before;
uint64_t fragments = consume_all(rd);
return {before, fragments};
}
static
bytes make_blob(size_t blob_size) {
static thread_local std::independent_bits_engine<std::default_random_engine, 8, uint8_t> random_bytes;
bytes big_blob(bytes::initialized_later(), blob_size);
for (auto&& b : big_blob) {
b = random_bytes();
}
return big_blob;
}
struct table_config {
sstring name;
int n_rows;
int value_size;
};
static void drop_keyspace_if_exists(cql_test_env& env, sstring name) {
try {
env.local_db().find_keyspace(name);
std::cout << "Dropping keyspace...\n";
env.execute_cql("drop keyspace ks;").get();
} catch (const no_such_keyspace&) {
// expected
}
}
static
table_config read_config(cql_test_env& env, const sstring& name) {
auto msg = env.execute_cql(sprint("select n_rows, value_size from ks.config where name = '%s'", name)).get0();
auto rows = dynamic_pointer_cast<transport::messages::result_message::rows>(msg);
if (rows->rs().size() < 1) {
throw std::runtime_error("config not found. Did you run --populate ?");
}
const std::vector<bytes_opt>& config_row = rows->rs().rows()[0];
if (config_row.size() != 2) {
throw std::runtime_error("config row has invalid size");
}
auto n_rows = value_cast<int>(int32_type->deserialize(*config_row[0]));
auto value_size = value_cast<int>(int32_type->deserialize(*config_row[1]));
return {name, n_rows, value_size};
}
static
void populate(cql_test_env& env, table_config cfg) {
drop_keyspace_if_exists(env, "ks");
env.execute_cql("CREATE KEYSPACE ks WITH REPLICATION = {'class' : 'SimpleStrategy', 'replication_factor' : 1};").get();
std::cout << "Saving test config...\n";
env.execute_cql("create table config (name text primary key, n_rows int, value_size int)").get();
env.execute_cql(sprint("insert into ks.config (name, n_rows, value_size) values ('%s', %d, %d)", cfg.name, cfg.n_rows, cfg.value_size)).get();
std::cout << "Creating test tables...\n";
// Large partition with lots of rows
env.execute_cql("create table test (pk int, ck int, value blob, primary key (pk, ck))"
" WITH compression = { 'sstable_compression' : '' };").get();
database& db = env.local_db();
{
std::cout << "Populating ks.test with " << cfg.n_rows << " rows...";
auto insert_id = env.prepare("update test set \"value\" = ? where \"pk\" = 0 and \"ck\" = ?;").get0();
for (int ck = 0; ck < cfg.n_rows; ++ck) {
env.execute_prepared(insert_id, {{
cql3::raw_value::make_value(data_value(make_blob(cfg.value_size)).serialize()),
cql3::raw_value::make_value(data_value(ck).serialize())
}}).get();
}
column_family& cf = db.find_column_family("ks", "test");
std::cout << "flushing...\n";
cf.flush().get();
std::cout << "compacting...\n";
cf.compact_all_sstables().get();
}
// Small partitions, but lots
env.execute_cql("create table small_part (pk int, value blob, primary key (pk))"
" WITH compression = { 'sstable_compression' : '' };").get();
{
std::cout << "Populating small_part with " << cfg.n_rows << " partitions...";
auto insert_id = env.prepare("update small_part set \"value\" = ? where \"pk\" = ?;").get0();
for (int pk = 0; pk < cfg.n_rows; ++pk) {
env.execute_prepared(insert_id, {{
cql3::raw_value::make_value(data_value(make_blob(cfg.value_size)).serialize()),
cql3::raw_value::make_value(data_value(pk).serialize())
}}).get();
}
column_family& cf = db.find_column_family("ks", "small_part");
std::cout << "flushing...\n";
cf.flush().get();
std::cout << "compacting...\n";
cf.compact_all_sstables().get();
}
}
int main(int argc, char** argv) {
namespace bpo = boost::program_options;
app_template app;
app.add_options()
("populate", "populate the table")
("verbose", "Enables more logging")
("trace", "Enables trace-level logging")
("rows", bpo::value<int>()->default_value(1000000), "Number of CQL rows in a partition. Relevant only for population.")
("value-size", bpo::value<int>()->default_value(100), "Size of value stored in a cell. Relevant only for population.")
("name", bpo::value<std::string>()->default_value("default"), "Name of the configuration")
;
return app.run(argc, argv, [&app] {
db::config cfg;
cfg.enable_cache = false;
cfg.enable_commitlog = false;
cfg.data_file_directories({ "./perf_large_partition_data" }, db::config::config_source::CommandLine);
if (!app.configuration().count("verbose")) {
logging::logger_registry().set_all_loggers_level(seastar::log_level::warn);
}
if (app.configuration().count("trace")) {
logging::logger_registry().set_logger_level("sstable", seastar::log_level::trace);
}
std::cout << "Data directory: " << cfg.data_file_directories() << "\n";
return do_with_cql_env([&app] (cql_test_env& env) {
return seastar::async([&app, &env] {
sstring name = app.configuration()["name"].as<std::string>();
if (app.configuration().count("populate")) {
int n_rows = app.configuration()["rows"].as<int>();
int value_size = app.configuration()["value-size"].as<int>();
table_config cfg{name, n_rows, value_size};
populate(env, cfg);
} else {
database& db = env.local_db();
column_family& cf = db.find_column_family("ks", "test");
auto cfg = read_config(env, name);
std::cout << "Config: rows: " << cfg.n_rows << ", value size: " << cfg.value_size << "\n";
::sleep(1s).get(); // wait for system table flushes to quiesce
cf.run_with_compaction_disabled([&] {
return seastar::async([&] {
{
std::cout << "Testing scanning large partition with skips. \n"
<< "Reads whole range interleaving reads with skips according to read-skip pattern:\n";
std::cout << sprint("%-7s %-7s ", "read", "skip") << test_result::table_header() << "\n";
auto test = [&] (int n_read, int n_skip) {
auto r = scan_rows_with_stride(cf, cfg.n_rows, n_read, n_skip);
std::cout << sprint("%-7d %-7d ", n_read, n_skip) << r.table_row() << "\n";
};
test(1, 0);
test(1, 1);
test(1, 8);
test(1, 16);
test(1, 32);
test(1, 64);
test(1, 256);
test(1, 1024);
test(1, 4096);
test(64, 1);
test(64, 8);
test(64, 16);
test(64, 32);
test(64, 64);
test(64, 256);
test(64, 1024);
test(64, 4096);
}
{
std::cout << "Testing slicing of large partition:\n";
std::cout << sprint("%-7s %-7s ", "offset", "read") << test_result::table_header() << "\n";
auto test = [&] (int offset, int read) {
auto r = slice_rows(cf, offset, read);
std::cout << sprint("%-7d %-7d ", offset, read) << r.table_row() << "\n";
};
test(0, 1);
test(0, 32);
test(0, 256);
test(0, 4096);
test(cfg.n_rows / 2, 1);
test(cfg.n_rows / 2, 32);
test(cfg.n_rows / 2, 256);
test(cfg.n_rows / 2, 4096);
}
});
}).get();
column_family& cf2 = db.find_column_family("ks", "small_part");
cf2.run_with_compaction_disabled([&] {
return seastar::async([&] {
{
std::cout << "Testing scanning small partitions with skips. \n"
<< "Reads whole range interleaving reads with skips according to read-skip pattern:\n";
std::cout << sprint("%-7s %-7s ", "read", "skip") << test_result::table_header() << "\n";
auto test = [&] (int n_read, int n_skip) {
auto r = scan_with_stride_partitions(cf2, cfg.n_rows, n_read, n_skip);
std::cout << sprint("%-7d %-7d ", n_read, n_skip) << r.table_row() << "\n";
};
test(1, 0);
test(1, 1);
test(1, 8);
test(1, 16);
test(1, 32);
test(1, 64);
test(1, 256);
test(1, 1024);
test(1, 4096);
test(64, 1);
test(64, 8);
test(64, 16);
test(64, 32);
test(64, 64);
test(64, 256);
test(64, 1024);
test(64, 4096);
}
{
std::cout << "Testing slicing small partitions:\n";
std::cout << sprint("%-7s %-7s ", "offset", "read") << test_result::table_header() << "\n";
auto test = [&] (int offset, int read) {
auto r = slice_partitions(cf2, cfg.n_rows, offset, read);
std::cout << sprint("%-7d %-7d ", offset, read) << r.table_row() << "\n";
};
test(0, 1);
test(0, 32);
test(0, 256);
test(0, 4096);
test(cfg.n_rows / 2, 1);
test(cfg.n_rows / 2, 32);
test(cfg.n_rows / 2, 256);
test(cfg.n_rows / 2, 4096);
}
});
}).get();
}
});
}, cfg);
});
}
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