586 lines
18 KiB
C++
586 lines
18 KiB
C++
/*
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* Copyright 2015 Cloudius Systems
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define BOOST_TEST_DYN_LINK
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#include <boost/test/unit_test.hpp>
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#include <seastar/core/sleep.hh>
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#include "tests/test-utils.hh"
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#include "tests/mutation_assertions.hh"
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#include "tests/mutation_reader_assertions.hh"
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#include "tests/mutation_source_test.hh"
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#include "schema_builder.hh"
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#include "row_cache.hh"
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#include "core/thread.hh"
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#include "memtable.hh"
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using namespace std::chrono_literals;
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static schema_ptr make_schema() {
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return schema_builder("ks", "cf")
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.with_column("pk", bytes_type, column_kind::partition_key)
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.with_column("v", bytes_type, column_kind::regular_column)
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.build();
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}
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static
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mutation make_new_mutation(schema_ptr s, partition_key key) {
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mutation m(key, s);
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static thread_local int next_value = 1;
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static thread_local api::timestamp_type next_timestamp = 1;
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m.set_clustered_cell(clustering_key::make_empty(*s), "v", data_value(to_bytes(sprint("v%d", next_value++))), next_timestamp++);
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return m;
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}
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static
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partition_key new_key(schema_ptr s) {
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static thread_local int next = 0;
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return partition_key::from_single_value(*s, to_bytes(sprint("key%d", next++)));
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}
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static
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mutation make_new_mutation(schema_ptr s) {
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return make_new_mutation(s, new_key(s));
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}
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SEASTAR_TEST_CASE(test_cache_delegates_to_underlying) {
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return seastar::async([] {
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auto s = make_schema();
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auto m = make_new_mutation(s);
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cache_tracker tracker;
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row_cache cache(s, [m] (const query::partition_range&) {
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return make_reader_returning(m);
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}, [m] (auto&&) {
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return make_key_from_mutation_reader(make_reader_returning(m));
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}, tracker);
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assert_that(cache.make_reader(query::full_partition_range))
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.produces(m)
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.produces_end_of_stream();
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});
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}
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SEASTAR_TEST_CASE(test_cache_works_after_clearing) {
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return seastar::async([] {
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auto s = make_schema();
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auto m = make_new_mutation(s);
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cache_tracker tracker;
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row_cache cache(s, [m] (const query::partition_range&) {
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return make_reader_returning(m);
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}, [m] (auto&&) {
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return make_key_from_mutation_reader(make_reader_returning(m));
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}, tracker);
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assert_that(cache.make_reader(query::full_partition_range))
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.produces(m)
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.produces_end_of_stream();
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tracker.clear();
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assert_that(cache.make_reader(query::full_partition_range))
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.produces(m)
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.produces_end_of_stream();
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});
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}
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static std::vector<mutation> make_ring(schema_ptr s, int n_mutations) {
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std::vector<mutation> mutations;
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for (int i = 0; i < n_mutations; ++i) {
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mutations.push_back(make_new_mutation(s));
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}
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std::sort(mutations.begin(), mutations.end(), mutation_decorated_key_less_comparator());
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return mutations;
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}
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SEASTAR_TEST_CASE(test_query_of_incomplete_range_goes_to_underlying) {
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return seastar::async([] {
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auto s = make_schema();
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std::vector<mutation> mutations = make_ring(s, 3);
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auto mt = make_lw_shared<memtable>(s);
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for (auto&& m : mutations) {
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mt->apply(m);
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}
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cache_tracker tracker;
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row_cache cache(s, mt->as_data_source(), mt->as_key_source(), tracker);
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auto get_partition_range = [] (const mutation& m) {
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return query::partition_range::make_singular(query::ring_position(m.decorated_key()));
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};
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// Populate cache for first key
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assert_that(cache.make_reader(get_partition_range(mutations[0])))
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.produces(mutations[0])
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.produces_end_of_stream();
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// Populate cache for last key
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assert_that(cache.make_reader(get_partition_range(mutations[2])))
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.produces(mutations[2])
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.produces_end_of_stream();
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// Test single-key queries
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assert_that(cache.make_reader(get_partition_range(mutations[0])))
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.produces(mutations[0])
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.produces_end_of_stream();
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assert_that(cache.make_reader(get_partition_range(mutations[2])))
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.produces(mutations[2])
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.produces_end_of_stream();
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// Test range query
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assert_that(cache.make_reader(query::full_partition_range))
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.produces(mutations[0])
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.produces(mutations[1])
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.produces(mutations[2])
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.produces_end_of_stream();
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});
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}
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SEASTAR_TEST_CASE(test_single_key_queries_after_population_in_reverse_order) {
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return seastar::async([] {
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auto s = make_schema();
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auto mt = make_lw_shared<memtable>(s);
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std::vector<mutation> mutations = make_ring(s, 3);
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for (auto&& m : mutations) {
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mt->apply(m);
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}
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cache_tracker tracker;
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row_cache cache(s, mt->as_data_source(), mt->as_key_source(), tracker);
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auto get_partition_range = [] (const mutation& m) {
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return query::partition_range::make_singular(query::ring_position(m.decorated_key()));
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};
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for (int i = 0; i < 2; ++i) {
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assert_that(cache.make_reader(get_partition_range(mutations[2])))
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.produces(mutations[2])
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.produces_end_of_stream();
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assert_that(cache.make_reader(get_partition_range(mutations[1])))
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.produces(mutations[1])
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.produces_end_of_stream();
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assert_that(cache.make_reader(get_partition_range(mutations[0])))
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.produces(mutations[0])
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.produces_end_of_stream();
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}
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});
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}
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SEASTAR_TEST_CASE(test_row_cache_conforms_to_mutation_source) {
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return seastar::async([] {
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cache_tracker tracker;
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run_mutation_source_tests([&tracker](schema_ptr s, const std::vector<mutation>& mutations) -> mutation_source {
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auto mt = make_lw_shared<memtable>(s);
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for (auto&& m : mutations) {
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mt->apply(m);
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}
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auto cache = make_lw_shared<row_cache>(s, mt->as_data_source(), mt->as_key_source(), tracker);
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return [cache] (const query::partition_range& range) {
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return cache->make_reader(range);
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};
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});
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});
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}
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SEASTAR_TEST_CASE(test_eviction) {
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return seastar::async([] {
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auto s = make_schema();
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auto mt = make_lw_shared<memtable>(s);
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cache_tracker tracker;
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row_cache cache(s, mt->as_data_source(), mt->as_key_source(), tracker);
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std::vector<dht::decorated_key> keys;
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for (int i = 0; i < 100000; i++) {
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auto m = make_new_mutation(s);
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keys.emplace_back(m.decorated_key());
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cache.populate(m);
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}
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std::random_shuffle(keys.begin(), keys.end());
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for (auto&& key : keys) {
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cache.make_reader(query::partition_range::make_singular(key));
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}
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while (tracker.region().occupancy().used_space() > 0) {
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logalloc::shard_tracker().reclaim(100);
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}
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});
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}
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bool has_key(row_cache& cache, const dht::decorated_key& key) {
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auto range = query::partition_range::make_singular(key);
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auto reader = cache.make_reader(range);
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auto mo = reader().get0();
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return bool(mo);
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}
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void verify_has(row_cache& cache, const dht::decorated_key& key) {
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BOOST_REQUIRE(has_key(cache, key));
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}
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void verify_does_not_have(row_cache& cache, const dht::decorated_key& key) {
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BOOST_REQUIRE(!has_key(cache, key));
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}
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void verify_has(row_cache& cache, const mutation& m) {
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auto range = query::partition_range::make_singular(m.decorated_key());
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auto reader = cache.make_reader(range);
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auto mo = reader().get0();
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BOOST_REQUIRE(bool(mo));
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assert_that(*mo).is_equal_to(m);
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}
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SEASTAR_TEST_CASE(test_update) {
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return seastar::async([] {
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auto s = make_schema();
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auto cache_mt = make_lw_shared<memtable>(s);
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cache_tracker tracker;
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row_cache cache(s, cache_mt->as_data_source(), cache_mt->as_key_source(), tracker);
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BOOST_MESSAGE("Check cache miss with populate");
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int partition_count = 1000;
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// populate cache with some partitions
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std::vector<dht::decorated_key> keys_in_cache;
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for (int i = 0; i < partition_count; i++) {
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auto m = make_new_mutation(s);
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keys_in_cache.push_back(m.decorated_key());
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cache.populate(m);
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}
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// populate memtable with partitions not in cache
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auto mt = make_lw_shared<memtable>(s);
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std::vector<dht::decorated_key> keys_not_in_cache;
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for (int i = 0; i < partition_count; i++) {
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auto m = make_new_mutation(s);
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keys_not_in_cache.push_back(m.decorated_key());
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mt->apply(m);
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}
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cache.update(*mt, [] (auto&& key) {
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return partition_presence_checker_result::definitely_doesnt_exist;
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}).get();
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for (auto&& key : keys_not_in_cache) {
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verify_has(cache, key);
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}
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for (auto&& key : keys_in_cache) {
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verify_has(cache, key);
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}
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std::copy(keys_not_in_cache.begin(), keys_not_in_cache.end(), std::back_inserter(keys_in_cache));
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keys_not_in_cache.clear();
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BOOST_MESSAGE("Check cache miss with drop");
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auto mt2 = make_lw_shared<memtable>(s);
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// populate memtable with partitions not in cache
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for (int i = 0; i < partition_count; i++) {
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auto m = make_new_mutation(s);
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keys_not_in_cache.push_back(m.decorated_key());
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mt2->apply(m);
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}
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cache.update(*mt2, [] (auto&& key) {
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return partition_presence_checker_result::maybe_exists;
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}).get();
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for (auto&& key : keys_not_in_cache) {
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verify_does_not_have(cache, key);
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}
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BOOST_MESSAGE("Check cache hit with merge");
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auto mt3 = make_lw_shared<memtable>(s);
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std::vector<mutation> new_mutations;
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for (auto&& key : keys_in_cache) {
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auto m = make_new_mutation(s, key.key());
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new_mutations.push_back(m);
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mt3->apply(m);
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}
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cache.update(*mt3, [] (auto&& key) {
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return partition_presence_checker_result::maybe_exists;
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}).get();
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for (auto&& m : new_mutations) {
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verify_has(cache, m);
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}
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});
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}
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class throttle {
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unsigned _block_counter = 0;
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promise<> _p; // valid when _block_counter != 0, resolves when goes down to 0
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public:
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future<> enter() {
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if (_block_counter) {
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promise<> p1;
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promise<> p2;
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auto f1 = p1.get_future();
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p2.get_future().then([p1 = std::move(p1), p3 = std::move(_p)] () mutable {
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p1.set_value();
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p3.set_value();
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});
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_p = std::move(p2);
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return f1;
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} else {
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return make_ready_future<>();
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}
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}
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void block() {
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++_block_counter;
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_p = promise<>();
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}
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void unblock() {
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assert(_block_counter);
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if (--_block_counter == 0) {
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_p.set_value();
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}
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}
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};
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class throttled_mutation_source {
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private:
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class impl : public enable_lw_shared_from_this<impl> {
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mutation_source _underlying;
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::throttle _throttle;
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private:
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class reader : public mutation_reader::impl {
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throttle& _throttle;
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mutation_reader _reader;
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public:
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reader(throttle& t, mutation_reader r)
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: _throttle(t)
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, _reader(std::move(r))
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{}
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virtual future<mutation_opt> operator()() override {
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return _reader().finally([this] () {
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return _throttle.enter();
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});
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}
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};
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public:
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impl(mutation_source underlying)
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: _underlying(std::move(underlying))
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{ }
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mutation_reader make_reader(const query::partition_range& pr) {
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return make_mutation_reader<reader>(_throttle, _underlying(pr));
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}
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::throttle& throttle() { return _throttle; }
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};
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lw_shared_ptr<impl> _impl;
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public:
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throttled_mutation_source(mutation_source underlying)
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: _impl(make_lw_shared<impl>(std::move(underlying)))
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{ }
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void block() {
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_impl->throttle().block();
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}
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void unblock() {
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_impl->throttle().unblock();
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}
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mutation_reader operator()(const query::partition_range& pr) {
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return _impl->make_reader(pr);
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}
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};
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static std::vector<mutation> updated_ring(std::vector<mutation>& mutations) {
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std::vector<mutation> result;
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for (auto&& m : mutations) {
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result.push_back(make_new_mutation(m.schema(), m.key()));
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}
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return result;
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}
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SEASTAR_TEST_CASE(test_cache_population_and_update_race) {
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return seastar::async([] {
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auto s = make_schema();
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std::vector<lw_shared_ptr<memtable>> memtables;
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auto memtables_data_source = [&] (const query::partition_range& pr) {
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std::vector<mutation_reader> readers;
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for (auto&& mt : memtables) {
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readers.emplace_back(mt->make_reader(pr));
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}
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return make_combined_reader(std::move(readers));
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};
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auto memtables_key_source = [&] (const query::partition_range& pr) {
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std::vector<key_reader> readers;
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for (auto&& mt : memtables) {
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readers.emplace_back(mt->as_key_source()(pr));
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}
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return make_combined_reader(s, std::move(readers));
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};
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throttled_mutation_source cache_source(memtables_data_source);
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cache_tracker tracker;
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row_cache cache(s, cache_source, memtables_key_source, tracker);
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auto mt1 = make_lw_shared<memtable>(s);
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memtables.push_back(mt1);
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auto ring = make_ring(s, 3);
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for (auto&& m : ring) {
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mt1->apply(m);
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}
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auto mt2 = make_lw_shared<memtable>(s);
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auto ring2 = updated_ring(ring);
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for (auto&& m : ring2) {
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mt2->apply(m);
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}
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cache_source.block();
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auto m0_range = query::partition_range::make_singular(ring[0].ring_position());
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auto rd1 = cache.make_reader(m0_range);
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auto rd1_result = rd1();
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auto rd2 = cache.make_reader();
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auto rd2_result = rd2();
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sleep(10ms).get();
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auto mt2_flushed = make_lw_shared<memtable>(s);
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mt2_flushed->apply(*mt2).get();
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memtables.push_back(mt2_flushed);
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// This update should miss on all partitions
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auto update_future = cache.update(*mt2, make_default_partition_presence_checker());
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auto rd3 = cache.make_reader();
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// rd2, which is in progress, should not prevent forward progress of update()
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cache_source.unblock();
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update_future.get();
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// Reads started before memtable flush should return previous value, otherwise this test
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// doesn't trigger the conditions it is supposed to protect against.
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assert_that(rd1_result.get0()).has_mutation().is_equal_to(ring[0]);
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assert_that(rd2_result.get0()).has_mutation().is_equal_to(ring[0]);
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assert_that(rd2().get0()).has_mutation().is_equal_to(ring2[1]);
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assert_that(rd2().get0()).has_mutation().is_equal_to(ring2[2]);
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assert_that(rd2().get0()).has_no_mutation();
|
|
|
|
// Reads started after update was started but before previous populations completed
|
|
// should already see the new data
|
|
assert_that(std::move(rd3))
|
|
.produces(ring2[0])
|
|
.produces(ring2[1])
|
|
.produces(ring2[2])
|
|
.produces_end_of_stream();
|
|
|
|
// Reads started after flush should see new data
|
|
assert_that(cache.make_reader())
|
|
.produces(ring2[0])
|
|
.produces(ring2[1])
|
|
.produces(ring2[2])
|
|
.produces_end_of_stream();
|
|
});
|
|
}
|
|
|
|
SEASTAR_TEST_CASE(test_invalidate) {
|
|
return seastar::async([] {
|
|
auto s = make_schema();
|
|
auto mt = make_lw_shared<memtable>(s);
|
|
|
|
cache_tracker tracker;
|
|
row_cache cache(s, mt->as_data_source(), mt->as_key_source(), tracker);
|
|
|
|
int partition_count = 1000;
|
|
|
|
// populate cache with some partitions
|
|
std::vector<dht::decorated_key> keys_in_cache;
|
|
for (int i = 0; i < partition_count; i++) {
|
|
auto m = make_new_mutation(s);
|
|
keys_in_cache.push_back(m.decorated_key());
|
|
cache.populate(m);
|
|
}
|
|
|
|
for (auto&& key : keys_in_cache) {
|
|
verify_has(cache, key);
|
|
}
|
|
|
|
// remove a single element from cache
|
|
auto some_element = keys_in_cache.begin() + 547;
|
|
std::vector<dht::decorated_key> keys_not_in_cache;
|
|
keys_not_in_cache.push_back(*some_element);
|
|
cache.invalidate(*some_element);
|
|
keys_in_cache.erase(some_element);
|
|
|
|
for (auto&& key : keys_in_cache) {
|
|
verify_has(cache, key);
|
|
}
|
|
for (auto&& key : keys_not_in_cache) {
|
|
verify_does_not_have(cache, key);
|
|
}
|
|
|
|
// remove a range of elements
|
|
std::sort(keys_in_cache.begin(), keys_in_cache.end(), [s] (auto& dk1, auto& dk2) {
|
|
return dk1.less_compare(*s, dk2);
|
|
});
|
|
auto some_range_begin = keys_in_cache.begin() + 123;
|
|
auto some_range_end = keys_in_cache.begin() + 423;
|
|
auto range = query::partition_range::make(
|
|
{ *some_range_begin, true }, { *some_range_end, false }
|
|
);
|
|
keys_not_in_cache.insert(keys_not_in_cache.end(), some_range_begin, some_range_end);
|
|
cache.invalidate(range);
|
|
keys_in_cache.erase(some_range_begin, some_range_end);
|
|
|
|
for (auto&& key : keys_in_cache) {
|
|
verify_has(cache, key);
|
|
}
|
|
for (auto&& key : keys_not_in_cache) {
|
|
verify_does_not_have(cache, key);
|
|
}
|
|
});
|
|
} |