5165780d81
drain() aborts the replay loop fiber and returns its future. It's grabbing _gate so stop() will wait on it. The intention is to call stop_replay_loop from storage_service::decommission and do_drain rather than stop, so we can stop the batchlog manager once, using a deferred action in main. Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
140 lines
4.3 KiB
C++
140 lines
4.3 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Copyright (C) 2015-present ScyllaDB
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*
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* Modified by ScyllaDB
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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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#pragma once
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#include <unordered_map>
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#include <seastar/core/future.hh>
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#include <seastar/core/distributed.hh>
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#include <seastar/core/timer.hh>
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#include <seastar/core/gate.hh>
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#include <seastar/core/metrics_registration.hh>
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#include <seastar/core/abort_source.hh>
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#include "gms/inet_address.hh"
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#include "inet_address_vectors.hh"
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#include "db_clock.hh"
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#include "mutation.hh"
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#include "utils/UUID.hh"
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#include <chrono>
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#include <limits>
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#include <random>
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namespace cql3 {
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class query_processor;
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} // namespace cql3
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namespace db {
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struct batchlog_manager_config {
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std::chrono::duration<double> write_request_timeout;
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uint64_t replay_rate = std::numeric_limits<uint64_t>::max();
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std::chrono::milliseconds delay;
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};
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class batchlog_manager {
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private:
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static constexpr uint32_t replay_interval = 60 * 1000; // milliseconds
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static constexpr uint32_t page_size = 128; // same as HHOM, for now, w/out using any heuristics. TODO: set based on avg batch size.
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using clock_type = lowres_clock;
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struct stats {
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uint64_t write_attempts = 0;
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} _stats;
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seastar::metrics::metric_groups _metrics;
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size_t _total_batches_replayed = 0;
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cql3::query_processor& _qp;
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db_clock::duration _write_request_timeout;
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uint64_t _replay_rate;
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future<> _started;
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std::chrono::milliseconds _delay;
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semaphore _sem{1};
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seastar::gate _gate;
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unsigned _cpu = 0;
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seastar::abort_source _stop;
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std::default_random_engine _e1{std::random_device{}()};
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future<> replay_all_failed_batches();
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public:
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// Takes a QP, not a distributes. Because this object is supposed
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// to be per shard and does no dispatching beyond delegating the the
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// shard qp (which is what you feed here).
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batchlog_manager(cql3::query_processor&, batchlog_manager_config config);
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future<> start();
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// abort the replay loop and return its future.
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future<> drain();
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future<> stop();
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future<> do_batch_log_replay();
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future<size_t> count_all_batches() const;
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size_t get_total_batches_replayed() const {
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return _total_batches_replayed;
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}
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mutation get_batch_log_mutation_for(const std::vector<mutation>&, const utils::UUID&, int32_t);
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mutation get_batch_log_mutation_for(const std::vector<mutation>&, const utils::UUID&, int32_t, db_clock::time_point);
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db_clock::duration get_batch_log_timeout() const;
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inet_address_vector_replica_set endpoint_filter(const sstring&, const std::unordered_map<sstring, std::unordered_set<gms::inet_address>>&);
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private:
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future<> batchlog_replay_loop();
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};
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extern distributed<batchlog_manager> _the_batchlog_manager;
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inline distributed<batchlog_manager>& get_batchlog_manager() {
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return _the_batchlog_manager;
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}
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inline batchlog_manager& get_local_batchlog_manager() {
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return _the_batchlog_manager.local();
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}
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}
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