d89edad9fb
Make compaction procedure switch to table_state. Only function in compaction.cc still directly using table is get_fully_expired_sstables(T,...), but subsequently we'll make it switch to table_state and then we can finally stop including database.hh in the compaction code. Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com>
1164 lines
49 KiB
C++
1164 lines
49 KiB
C++
/*
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* Copyright (C) 2015-present 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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#include "compaction_manager.hh"
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#include "compaction_strategy.hh"
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#include "compaction_backlog_manager.hh"
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#include "sstables/sstables.hh"
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#include "sstables/sstables_manager.hh"
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#include "database.hh"
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#include <seastar/core/metrics.hh>
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#include <seastar/core/coroutine.hh>
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#include "sstables/exceptions.hh"
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#include "locator/abstract_replication_strategy.hh"
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#include "utils/fb_utilities.hh"
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#include "utils/UUID_gen.hh"
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#include <cmath>
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static logging::logger cmlog("compaction_manager");
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using namespace std::chrono_literals;
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class compacting_sstable_registration {
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compaction_manager* _cm;
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std::vector<sstables::shared_sstable> _compacting;
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public:
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compacting_sstable_registration(compaction_manager* cm, std::vector<sstables::shared_sstable> compacting)
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: _cm(cm)
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, _compacting(std::move(compacting))
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{
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_cm->register_compacting_sstables(_compacting);
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}
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compacting_sstable_registration& operator=(const compacting_sstable_registration&) = delete;
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compacting_sstable_registration(const compacting_sstable_registration&) = delete;
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compacting_sstable_registration& operator=(compacting_sstable_registration&& other) noexcept {
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if (this != &other) {
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this->~compacting_sstable_registration();
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new (this) compacting_sstable_registration(std::move(other));
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}
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return *this;
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}
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compacting_sstable_registration(compacting_sstable_registration&& other) noexcept
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: _cm(other._cm)
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, _compacting(std::move(other._compacting))
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{
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other._cm = nullptr;
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}
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~compacting_sstable_registration() {
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if (_cm) {
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_cm->deregister_compacting_sstables(_compacting);
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}
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}
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// Explicitly release compacting sstables
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void release_compacting(const std::vector<sstables::shared_sstable>& sstables) {
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_cm->deregister_compacting_sstables(sstables);
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for (auto& sst : sstables) {
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_compacting.erase(boost::remove(_compacting, sst), _compacting.end());
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}
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}
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};
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sstables::compaction_data compaction_manager::create_compaction_data() {
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sstables::compaction_data cdata = {};
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cdata.compaction_uuid = utils::UUID_gen::get_time_UUID();
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return cdata;
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}
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compaction_weight_registration::compaction_weight_registration(compaction_manager* cm, int weight)
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: _cm(cm)
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, _weight(weight)
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{
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_cm->register_weight(_weight);
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}
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compaction_weight_registration& compaction_weight_registration::operator=(compaction_weight_registration&& other) noexcept {
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if (this != &other) {
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this->~compaction_weight_registration();
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new (this) compaction_weight_registration(std::move(other));
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}
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return *this;
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}
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compaction_weight_registration::compaction_weight_registration(compaction_weight_registration&& other) noexcept
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: _cm(other._cm)
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, _weight(other._weight)
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{
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other._cm = nullptr;
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other._weight = 0;
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}
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compaction_weight_registration::~compaction_weight_registration() {
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if (_cm) {
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_cm->deregister_weight(_weight);
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}
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}
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void compaction_weight_registration::deregister() {
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_cm->deregister_weight(_weight);
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_cm = nullptr;
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}
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int compaction_weight_registration::weight() const {
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return _weight;
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}
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static inline uint64_t get_total_size(const std::vector<sstables::shared_sstable>& sstables) {
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uint64_t total_size = 0;
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for (auto& sst : sstables) {
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total_size += sst->data_size();
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}
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return total_size;
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}
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// Calculate weight of compaction job.
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static inline int calculate_weight(uint64_t total_size) {
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// At the moment, '4' is being used as log base for determining the weight
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// of a compaction job. With base of 4, what happens is that when you have
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// a 40-second compaction in progress, and a tiny 10-second compaction
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// comes along, you do them in parallel.
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// TODO: Find a possibly better log base through experimentation.
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static constexpr int WEIGHT_LOG_BASE = 4;
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// Fixed tax is added to size before taking the log, to make sure all jobs
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// smaller than the tax (i.e. 1MB) will be serialized.
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static constexpr int fixed_size_tax = 1024*1024;
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// computes the logarithm (base WEIGHT_LOG_BASE) of total_size.
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return int(std::log(total_size + fixed_size_tax) / std::log(WEIGHT_LOG_BASE));
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}
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static inline int calculate_weight(const sstables::compaction_descriptor& descriptor) {
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// Use weight 0 for compactions that are comprised solely of completely expired sstables.
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// We want these compactions to be in a separate weight class because they are very lightweight, fast and efficient.
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if (descriptor.sstables.empty() || descriptor.has_only_fully_expired) {
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return 0;
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}
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return calculate_weight(get_total_size(descriptor.sstables));
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}
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unsigned compaction_manager::current_compaction_fan_in_threshold() const {
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if (_tasks.empty()) {
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return 0;
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}
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auto largest_fan_in = std::ranges::max(_tasks | boost::adaptors::transformed([] (auto& task) {
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return task->compaction_running ? task->compaction_data.compaction_fan_in : 0;
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}));
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// conservatively limit fan-in threshold to 32, such that tons of small sstables won't accumulate if
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// running major on a leveled table, which can even have more than one thousand files.
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return std::min(unsigned(32), largest_fan_in);
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}
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bool compaction_manager::can_register_compaction(column_family* cf, int weight, unsigned fan_in) const {
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// Only one weight is allowed if parallel compaction is disabled.
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if (!cf->get_compaction_strategy().parallel_compaction() && has_table_ongoing_compaction(cf)) {
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return false;
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}
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// TODO: Maybe allow only *smaller* compactions to start? That can be done
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// by returning true only if weight is not in the set and is lower than any
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// entry in the set.
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if (_weight_tracker.contains(weight)) {
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// If reached this point, it means that there is an ongoing compaction
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// with the weight of the compaction job.
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return false;
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}
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// A compaction cannot proceed until its fan-in is greater than or equal to the current largest fan-in.
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// That's done to prevent a less efficient compaction from "diluting" a more efficient one.
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// Compactions with the same efficiency can run in parallel as long as they aren't similar sized,
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// i.e. an efficient small-sized job can proceed in parallel to an efficient big-sized one.
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if (fan_in < current_compaction_fan_in_threshold()) {
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return false;
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}
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return true;
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}
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void compaction_manager::register_weight(int weight) {
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_weight_tracker.insert(weight);
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}
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void compaction_manager::deregister_weight(int weight) {
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_weight_tracker.erase(weight);
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reevaluate_postponed_compactions();
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}
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std::vector<sstables::shared_sstable> compaction_manager::get_candidates(const column_family& cf) {
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std::vector<sstables::shared_sstable> candidates;
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candidates.reserve(cf.sstables_count());
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// prevents sstables that belongs to a partial run being generated by ongoing compaction from being
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// selected for compaction, which could potentially result in wrong behavior.
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auto partial_run_identifiers = boost::copy_range<std::unordered_set<utils::UUID>>(_tasks
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| boost::adaptors::transformed(std::mem_fn(&task::output_run_identifier)));
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auto& cs = cf.get_compaction_strategy();
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// Filter out sstables that are being compacted.
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for (auto& sst : cf.in_strategy_sstables()) {
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if (_compacting_sstables.contains(sst)) {
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continue;
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}
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if (!cs.can_compact_partial_runs() && partial_run_identifiers.contains(sst->run_identifier())) {
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continue;
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}
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candidates.push_back(sst);
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}
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return candidates;
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}
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void compaction_manager::register_compacting_sstables(const std::vector<sstables::shared_sstable>& sstables) {
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std::unordered_set<sstables::shared_sstable> sstables_to_merge;
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sstables_to_merge.reserve(sstables.size());
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for (auto& sst : sstables) {
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sstables_to_merge.insert(sst);
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}
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// make all required allocations in advance to merge
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// so it should not throw
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_compacting_sstables.reserve(_compacting_sstables.size() + sstables.size());
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try {
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_compacting_sstables.merge(sstables_to_merge);
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} catch (...) {
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cmlog.error("Unexpected error when registering compacting SSTables: {}. Ignored...", std::current_exception());
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}
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}
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void compaction_manager::deregister_compacting_sstables(const std::vector<sstables::shared_sstable>& sstables) {
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// Remove compacted sstables from the set of compacting sstables.
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for (auto& sst : sstables) {
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_compacting_sstables.erase(sst);
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}
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}
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class user_initiated_backlog_tracker final : public compaction_backlog_tracker::impl {
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public:
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explicit user_initiated_backlog_tracker(float added_backlog, size_t available_memory) : _added_backlog(added_backlog), _available_memory(available_memory) {}
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private:
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float _added_backlog;
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size_t _available_memory;
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virtual double backlog(const compaction_backlog_tracker::ongoing_writes& ow, const compaction_backlog_tracker::ongoing_compactions& oc) const override {
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return _added_backlog * _available_memory;
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}
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virtual void add_sstable(sstables::shared_sstable sst) override { }
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virtual void remove_sstable(sstables::shared_sstable sst) override { }
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};
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future<> compaction_manager::perform_major_compaction(column_family* cf) {
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if (_state != state::enabled) {
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return make_ready_future<>();
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}
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auto task = make_lw_shared<compaction_manager::task>(cf, sstables::compaction_type::Compaction);
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_tasks.push_back(task);
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// first take major compaction semaphore, then exclusely take compaction lock for column family.
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// it cannot be the other way around, or minor compaction for this column family would be
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// prevented while an ongoing major compaction doesn't release the semaphore.
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task->compaction_done = with_semaphore(_major_compaction_sem, 1, [this, task, cf] {
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return with_lock(_compaction_state[cf].lock.for_write(), [this, task, cf] {
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_stats.active_tasks++;
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if (!can_proceed(task)) {
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return make_ready_future<>();
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}
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// candidates are sstables that aren't being operated on by other compaction types.
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// those are eligible for major compaction.
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sstables::compaction_strategy cs = cf->get_compaction_strategy();
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sstables::compaction_descriptor descriptor = cs.get_major_compaction_job(cf->as_table_state(), get_candidates(*cf));
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auto compacting = make_lw_shared<compacting_sstable_registration>(this, descriptor.sstables);
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descriptor.release_exhausted = [compacting] (const std::vector<sstables::shared_sstable>& exhausted_sstables) {
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compacting->release_compacting(exhausted_sstables);
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};
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task->setup_new_compaction();
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task->output_run_identifier = descriptor.run_identifier;
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cmlog.info0("User initiated compaction started on behalf of {}.{}", cf->schema()->ks_name(), cf->schema()->cf_name());
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compaction_backlog_tracker user_initiated(std::make_unique<user_initiated_backlog_tracker>(_compaction_controller.backlog_of_shares(200), _available_memory));
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return do_with(std::move(user_initiated), [this, cf, descriptor = std::move(descriptor), task] (compaction_backlog_tracker& bt) mutable {
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register_backlog_tracker(bt);
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return with_scheduling_group(_compaction_controller.sg(), [this, cf, descriptor = std::move(descriptor), task] () mutable {
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return cf->compact_sstables(std::move(descriptor), task->compaction_data);
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});
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}).then([compacting = std::move(compacting)] {});
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});
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}).then_wrapped([this, task] (future<> f) {
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_stats.active_tasks--;
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_tasks.remove(task);
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try {
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f.get();
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_stats.completed_tasks++;
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} catch (sstables::compaction_stopped_exception& e) {
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cmlog.info("major compaction stopped, reason: {}", e.what());
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} catch (...) {
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cmlog.error("major compaction failed, reason: {}", std::current_exception());
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_stats.errors++;
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}
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});
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return task->compaction_done.get_future().then([task] {});
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}
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future<> compaction_manager::run_custom_job(column_family* cf, sstables::compaction_type type, noncopyable_function<future<>(sstables::compaction_data&)> job) {
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if (_state != state::enabled) {
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return make_ready_future<>();
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}
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auto task = make_lw_shared<compaction_manager::task>(cf, type);
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_tasks.push_back(task);
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auto job_ptr = std::make_unique<noncopyable_function<future<>(sstables::compaction_data&)>>(std::move(job));
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task->compaction_done = with_semaphore(_custom_job_sem, 1, [this, task, cf, &job = *job_ptr] () mutable {
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// take read lock for cf, so major compaction and resharding can't proceed in parallel.
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return with_lock(_compaction_state[cf].lock.for_read(), [this, task, cf, &job] () mutable {
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_stats.active_tasks++;
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if (!can_proceed(task)) {
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return make_ready_future<>();
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}
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task->setup_new_compaction();
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// NOTE:
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// no need to register shared sstables because they're excluded from non-resharding
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// compaction and some of them may not even belong to current shard.
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return job(task->compaction_data);
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});
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}).then_wrapped([this, task, job_ptr = std::move(job_ptr)] (future<> f) {
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_stats.active_tasks--;
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_tasks.remove(task);
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try {
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f.get();
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} catch (sstables::compaction_stopped_exception& e) {
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cmlog.info("{} was abruptly stopped, reason: {}", task->type, e.what());
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throw;
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} catch (...) {
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cmlog.error("{} failed: {}", task->type, std::current_exception());
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throw;
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}
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});
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return task->compaction_done.get_future().then([task] {});
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}
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bool compaction_manager::compaction_state::compaction_disabled() const {
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return with_compaction_disabled_gate.get_count() > 0;
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}
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future<>
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compaction_manager::run_with_compaction_disabled(table* t, std::function<future<> ()> func) {
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auto& c_state = _compaction_state[t];
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auto holder = c_state.with_compaction_disabled_gate.hold();
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co_await stop_ongoing_compactions("user-triggered operation", t);
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std::exception_ptr err;
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try {
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co_await func();
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} catch (...) {
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err = std::current_exception();
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}
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#ifdef DEBUG
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assert(_compaction_state.contains(t));
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#endif
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// submit compaction request if we're the last holder of the gate which is still opened.
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if (!c_state.with_compaction_disabled_gate.is_closed() && c_state.with_compaction_disabled_gate.get_count() == 1) {
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holder.release();
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submit(t);
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}
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if (err) {
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std::rethrow_exception(err);
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}
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co_return;
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}
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void compaction_manager::task::setup_new_compaction() {
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compaction_data = create_compaction_data();
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compaction_running = true;
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}
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void compaction_manager::task::finish_compaction() {
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compaction_running = false;
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}
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future<> compaction_manager::task_stop(lw_shared_ptr<compaction_manager::task> task, sstring reason) {
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task->stopping = true;
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task->compaction_data.stop(reason);
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auto f = task->compaction_done.get_future();
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return f.then([task] {
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task->stopping = false;
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return make_ready_future<>();
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});
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}
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compaction_manager::compaction_manager(compaction_scheduling_group csg, maintenance_scheduling_group msg, size_t available_memory, abort_source& as)
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: _compaction_controller(csg.cpu, csg.io, 250ms, [this, available_memory] () -> float {
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_last_backlog = backlog();
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auto b = _last_backlog / available_memory;
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// This means we are using an unimplemented strategy
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if (compaction_controller::backlog_disabled(b)) {
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// returning the normalization factor means that we'll return the maximum
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// output in the _control_points. We can get rid of this when we implement
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// all strategies.
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return compaction_controller::normalization_factor;
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}
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return b;
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})
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, _backlog_manager(_compaction_controller)
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, _maintenance_sg(msg)
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, _available_memory(available_memory)
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, _early_abort_subscription(as.subscribe([this] () noexcept {
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do_stop();
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}))
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{
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register_metrics();
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}
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compaction_manager::compaction_manager(compaction_scheduling_group csg, maintenance_scheduling_group msg, size_t available_memory, uint64_t shares, abort_source& as)
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: _compaction_controller(csg.cpu, csg.io, shares)
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, _backlog_manager(_compaction_controller)
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, _maintenance_sg(msg)
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, _available_memory(available_memory)
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, _early_abort_subscription(as.subscribe([this] () noexcept {
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do_stop();
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}))
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{
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register_metrics();
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}
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compaction_manager::compaction_manager()
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: _compaction_controller(seastar::default_scheduling_group(), default_priority_class(), 1)
|
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, _backlog_manager(_compaction_controller)
|
|
, _maintenance_sg(maintenance_scheduling_group{default_scheduling_group(), default_priority_class()})
|
|
, _available_memory(1)
|
|
{
|
|
// No metric registration because this constructor is supposed to be used only by the testing
|
|
// infrastructure.
|
|
}
|
|
|
|
compaction_manager::~compaction_manager() {
|
|
// Assert that compaction manager was explicitly stopped, if started.
|
|
// Otherwise, fiber(s) will be alive after the object is stopped.
|
|
assert(_state == state::none || _state == state::stopped);
|
|
}
|
|
|
|
void compaction_manager::register_metrics() {
|
|
namespace sm = seastar::metrics;
|
|
|
|
_metrics.add_group("compaction_manager", {
|
|
sm::make_gauge("compactions", [this] { return _stats.active_tasks; },
|
|
sm::description("Holds the number of currently active compactions.")),
|
|
sm::make_gauge("pending_compactions", [this] { return _stats.pending_tasks; },
|
|
sm::description("Holds the number of compaction tasks waiting for an opportunity to run.")),
|
|
sm::make_gauge("backlog", [this] { return _last_backlog; },
|
|
sm::description("Holds the sum of compaction backlog for all tables in the system.")),
|
|
});
|
|
}
|
|
|
|
void compaction_manager::enable() {
|
|
assert(_state == state::none || _state == state::disabled);
|
|
_state = state::enabled;
|
|
_compaction_submission_timer.arm(periodic_compaction_submission_interval());
|
|
postponed_compactions_reevaluation();
|
|
}
|
|
|
|
void compaction_manager::disable() {
|
|
assert(_state == state::none || _state == state::enabled);
|
|
_state = state::disabled;
|
|
_compaction_submission_timer.cancel();
|
|
}
|
|
|
|
std::function<void()> compaction_manager::compaction_submission_callback() {
|
|
return [this] () mutable {
|
|
for (auto& e: _compaction_state) {
|
|
submit(e.first);
|
|
}
|
|
};
|
|
}
|
|
|
|
void compaction_manager::postponed_compactions_reevaluation() {
|
|
_waiting_reevalution = repeat([this] {
|
|
return _postponed_reevaluation.wait().then([this] {
|
|
if (_state != state::enabled) {
|
|
_postponed.clear();
|
|
return stop_iteration::yes;
|
|
}
|
|
auto postponed = std::move(_postponed);
|
|
try {
|
|
for (auto& cf : postponed) {
|
|
submit(cf);
|
|
}
|
|
} catch (...) {
|
|
_postponed = std::move(postponed);
|
|
}
|
|
return stop_iteration::no;
|
|
});
|
|
});
|
|
}
|
|
|
|
void compaction_manager::reevaluate_postponed_compactions() {
|
|
_postponed_reevaluation.signal();
|
|
}
|
|
|
|
void compaction_manager::postpone_compaction_for_column_family(column_family* cf) {
|
|
_postponed.insert(cf);
|
|
}
|
|
|
|
future<> compaction_manager::stop_tasks(std::vector<lw_shared_ptr<task>> tasks, sstring reason) {
|
|
// To prevent compaction from being postponed while tasks are being stopped, let's set all
|
|
// tasks as stopping before the deferring point below.
|
|
for (auto& t : tasks) {
|
|
t->stopping = true;
|
|
}
|
|
return do_with(std::move(tasks), [this, reason] (std::vector<lw_shared_ptr<task>>& tasks) {
|
|
return parallel_for_each(tasks, [this, reason] (auto& task) {
|
|
return this->task_stop(task, reason).then_wrapped([](future <> f) {
|
|
try {
|
|
f.get();
|
|
} catch (sstables::compaction_stopped_exception& e) {
|
|
// swallow stop exception if a given procedure decides to propagate it to the caller,
|
|
// as it happens with reshard and reshape.
|
|
} catch (...) {
|
|
throw;
|
|
}
|
|
});
|
|
});
|
|
});
|
|
}
|
|
|
|
future<> compaction_manager::stop_ongoing_compactions(sstring reason) {
|
|
cmlog.info("Stopping {} ongoing compactions due to {}", get_compactions().size(), reason);
|
|
|
|
// Wait for each task handler to stop. Copy list because task remove itself
|
|
// from the list when done.
|
|
auto tasks = boost::copy_range<std::vector<lw_shared_ptr<task>>>(_tasks);
|
|
return stop_tasks(std::move(tasks), std::move(reason));
|
|
}
|
|
|
|
future<> compaction_manager::stop_ongoing_compactions(sstring reason, column_family* cf) {
|
|
auto tasks = boost::copy_range<std::vector<lw_shared_ptr<task>>>(_tasks | boost::adaptors::filtered([cf] (auto& task) {
|
|
return task->compacting_cf == cf;
|
|
}));
|
|
cmlog.info("Stopping {} ongoing compactions for table {}.{} due to {}", tasks.size(), cf->schema()->ks_name(), cf->schema()->cf_name(), reason);
|
|
return stop_tasks(std::move(tasks), std::move(reason));
|
|
}
|
|
|
|
future<> compaction_manager::drain() {
|
|
if (!*_early_abort_subscription) {
|
|
return make_ready_future<>();
|
|
}
|
|
|
|
_state = state::disabled;
|
|
return stop_ongoing_compactions("drain");
|
|
}
|
|
|
|
future<> compaction_manager::stop() {
|
|
// never started
|
|
if (_state == state::none) {
|
|
return make_ready_future<>();
|
|
} else {
|
|
do_stop();
|
|
return std::move(*_stop_future);
|
|
}
|
|
}
|
|
|
|
void compaction_manager::really_do_stop() {
|
|
if (_state == state::none || _state == state::stopped) {
|
|
return;
|
|
}
|
|
|
|
_state = state::stopped;
|
|
cmlog.info("Asked to stop");
|
|
// Reset the metrics registry
|
|
_metrics.clear();
|
|
_stop_future.emplace(stop_ongoing_compactions("shutdown").then([this] () mutable {
|
|
reevaluate_postponed_compactions();
|
|
return std::move(_waiting_reevalution);
|
|
}).then([this] {
|
|
_weight_tracker.clear();
|
|
_compaction_submission_timer.cancel();
|
|
cmlog.info("Stopped");
|
|
return _compaction_controller.shutdown();
|
|
}));
|
|
}
|
|
|
|
void compaction_manager::do_stop() noexcept {
|
|
try {
|
|
really_do_stop();
|
|
} catch (...) {
|
|
try {
|
|
cmlog.error("Failed to stop the manager: {}", std::current_exception());
|
|
} catch (...) {
|
|
// Nothing else we can do.
|
|
}
|
|
}
|
|
}
|
|
|
|
inline bool compaction_manager::can_proceed(const lw_shared_ptr<task>& task) {
|
|
return (_state == state::enabled) && !task->stopping &&
|
|
(task->type != sstables::compaction_type::Compaction || !_compaction_state[task->compacting_cf].compaction_disabled());
|
|
}
|
|
|
|
inline future<> compaction_manager::put_task_to_sleep(lw_shared_ptr<task>& task) {
|
|
cmlog.info("compaction task handler sleeping for {} seconds",
|
|
std::chrono::duration_cast<std::chrono::seconds>(task->compaction_retry.sleep_time()).count());
|
|
return task->compaction_retry.retry();
|
|
}
|
|
|
|
inline bool compaction_manager::maybe_stop_on_error(future<> f, stop_iteration will_stop) {
|
|
bool retry = false;
|
|
|
|
try {
|
|
f.get();
|
|
} catch (sstables::compaction_stopped_exception& e) {
|
|
cmlog.info("compaction info: {}: stopping", e.what());
|
|
} catch (sstables::compaction_aborted_exception& e) {
|
|
cmlog.error("compaction info: {}: stopping", e.what());
|
|
_stats.errors++;
|
|
} catch (storage_io_error& e) {
|
|
_stats.errors++;
|
|
cmlog.error("compaction failed due to storage io error: {}: stopping", e.what());
|
|
do_stop();
|
|
} catch (...) {
|
|
_stats.errors++;
|
|
retry = (will_stop == stop_iteration::no);
|
|
cmlog.error("compaction failed: {}: {}", std::current_exception(), retry ? "retrying" : "stopping");
|
|
}
|
|
return retry;
|
|
}
|
|
|
|
void compaction_manager::submit(column_family* cf) {
|
|
if (cf->is_auto_compaction_disabled_by_user()) {
|
|
return;
|
|
}
|
|
|
|
auto task = make_lw_shared<compaction_manager::task>(cf, sstables::compaction_type::Compaction);
|
|
_tasks.push_back(task);
|
|
_stats.pending_tasks++;
|
|
|
|
task->compaction_done = repeat([this, task, cf] () mutable {
|
|
if (!can_proceed(task)) {
|
|
_stats.pending_tasks--;
|
|
return make_ready_future<stop_iteration>(stop_iteration::yes);
|
|
}
|
|
return with_lock(_compaction_state[cf].lock.for_read(), [this, task] () mutable {
|
|
return with_scheduling_group(_compaction_controller.sg(), [this, task = std::move(task)] () mutable {
|
|
column_family& cf = *task->compacting_cf;
|
|
sstables::compaction_strategy cs = cf.get_compaction_strategy();
|
|
sstables::compaction_descriptor descriptor = cs.get_sstables_for_compaction(cf.as_table_state(), get_candidates(cf));
|
|
int weight = calculate_weight(descriptor);
|
|
|
|
if (descriptor.sstables.empty() || !can_proceed(task) || cf.is_auto_compaction_disabled_by_user()) {
|
|
_stats.pending_tasks--;
|
|
return make_ready_future<stop_iteration>(stop_iteration::yes);
|
|
}
|
|
if (!can_register_compaction(&cf, weight, descriptor.fan_in())) {
|
|
_stats.pending_tasks--;
|
|
cmlog.debug("Refused compaction job ({} sstable(s)) of weight {} for {}.{}, postponing it...",
|
|
descriptor.sstables.size(), weight, cf.schema()->ks_name(), cf.schema()->cf_name());
|
|
postpone_compaction_for_column_family(&cf);
|
|
return make_ready_future<stop_iteration>(stop_iteration::yes);
|
|
}
|
|
auto compacting = make_lw_shared<compacting_sstable_registration>(this, descriptor.sstables);
|
|
auto weight_r = compaction_weight_registration(this, weight);
|
|
descriptor.release_exhausted = [compacting] (const std::vector<sstables::shared_sstable>& exhausted_sstables) {
|
|
compacting->release_compacting(exhausted_sstables);
|
|
};
|
|
cmlog.debug("Accepted compaction job ({} sstable(s)) of weight {} for {}.{}",
|
|
descriptor.sstables.size(), weight, cf.schema()->ks_name(), cf.schema()->cf_name());
|
|
|
|
_stats.pending_tasks--;
|
|
_stats.active_tasks++;
|
|
task->setup_new_compaction();
|
|
task->output_run_identifier = descriptor.run_identifier;
|
|
return cf.compact_sstables(std::move(descriptor), task->compaction_data).then_wrapped([this, task, compacting = std::move(compacting), weight_r = std::move(weight_r)] (future<> f) mutable {
|
|
_stats.active_tasks--;
|
|
task->finish_compaction();
|
|
|
|
if (!can_proceed(task)) {
|
|
maybe_stop_on_error(std::move(f), stop_iteration::yes);
|
|
return make_ready_future<stop_iteration>(stop_iteration::yes);
|
|
}
|
|
if (maybe_stop_on_error(std::move(f))) {
|
|
_stats.pending_tasks++;
|
|
return put_task_to_sleep(task).then([] {
|
|
return make_ready_future<stop_iteration>(stop_iteration::no);
|
|
});
|
|
}
|
|
_stats.pending_tasks++;
|
|
_stats.completed_tasks++;
|
|
task->compaction_retry.reset();
|
|
reevaluate_postponed_compactions();
|
|
return make_ready_future<stop_iteration>(stop_iteration::no);
|
|
});
|
|
});
|
|
});
|
|
}).finally([this, task] {
|
|
_tasks.remove(task);
|
|
});
|
|
}
|
|
|
|
void compaction_manager::submit_offstrategy(column_family* cf) {
|
|
auto task = make_lw_shared<compaction_manager::task>(cf, sstables::compaction_type::Reshape);
|
|
_tasks.push_back(task);
|
|
_stats.pending_tasks++;
|
|
|
|
task->compaction_done = repeat([this, task, cf] () mutable {
|
|
if (!can_proceed(task)) {
|
|
_stats.pending_tasks--;
|
|
return make_ready_future<stop_iteration>(stop_iteration::yes);
|
|
}
|
|
return with_semaphore(_custom_job_sem, 1, [this, task, cf] () mutable {
|
|
return with_lock(_compaction_state[cf].lock.for_read(), [this, task, cf] () mutable {
|
|
_stats.pending_tasks--;
|
|
if (!can_proceed(task)) {
|
|
return make_ready_future<stop_iteration>(stop_iteration::yes);
|
|
}
|
|
_stats.active_tasks++;
|
|
task->setup_new_compaction();
|
|
|
|
return cf->run_offstrategy_compaction(task->compaction_data).then_wrapped([this, task] (future<> f) mutable {
|
|
_stats.active_tasks--;
|
|
task->finish_compaction();
|
|
try {
|
|
f.get();
|
|
_stats.completed_tasks++;
|
|
} catch (sstables::compaction_stopped_exception& e) {
|
|
cmlog.info("off-strategy compaction: {}", e.what());
|
|
} catch (sstables::compaction_aborted_exception& e) {
|
|
_stats.errors++;
|
|
cmlog.error("off-strategy compaction: {}", e.what());
|
|
} catch (...) {
|
|
_stats.errors++;
|
|
_stats.pending_tasks++;
|
|
cmlog.error("off-strategy compaction failed due to {}, retrying...", std::current_exception());
|
|
return put_task_to_sleep(task).then([] {
|
|
return make_ready_future<stop_iteration>(stop_iteration::no);
|
|
});
|
|
}
|
|
return make_ready_future<stop_iteration>(stop_iteration::yes);
|
|
});
|
|
});
|
|
});
|
|
}).finally([this, task] {
|
|
_tasks.remove(task);
|
|
});
|
|
}
|
|
|
|
inline bool compaction_manager::check_for_cleanup(column_family* cf) {
|
|
for (auto& task : _tasks) {
|
|
if (task->compacting_cf == cf && task->type == sstables::compaction_type::Cleanup) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
future<> compaction_manager::rewrite_sstables(column_family* cf, sstables::compaction_type_options options, get_candidates_func get_func, can_purge_tombstones can_purge) {
|
|
auto task = make_lw_shared<compaction_manager::task>(cf, options.type());
|
|
_tasks.push_back(task);
|
|
|
|
auto sstables = std::make_unique<std::vector<sstables::shared_sstable>>(get_func(*cf));
|
|
// sort sstables by size in descending order, such that the smallest files will be rewritten first
|
|
// (as sstable to be rewritten is popped off from the back of container), so rewrite will have higher
|
|
// chance to succeed when the biggest files are reached.
|
|
std::sort(sstables->begin(), sstables->end(), [](sstables::shared_sstable& a, sstables::shared_sstable& b) {
|
|
return a->data_size() > b->data_size();
|
|
});
|
|
|
|
auto compacting = make_lw_shared<compacting_sstable_registration>(this, *sstables);
|
|
auto sstables_ptr = sstables.get();
|
|
_stats.pending_tasks += sstables->size();
|
|
|
|
task->compaction_done = do_until([this, sstables_ptr, task] { return sstables_ptr->empty() || !can_proceed(task); },
|
|
[this, task, options, sstables_ptr, compacting, can_purge] () mutable {
|
|
auto sst = sstables_ptr->back();
|
|
sstables_ptr->pop_back();
|
|
|
|
return repeat([this, task, options, sst = std::move(sst), compacting, can_purge] () mutable {
|
|
column_family& cf = *task->compacting_cf;
|
|
auto sstable_level = sst->get_sstable_level();
|
|
auto run_identifier = sst->run_identifier();
|
|
auto sstable_set_snapshot = can_purge ? std::make_optional(cf.get_sstable_set()) : std::nullopt;
|
|
auto descriptor = sstables::compaction_descriptor({ sst }, std::move(sstable_set_snapshot), _maintenance_sg.io,
|
|
sstable_level, sstables::compaction_descriptor::default_max_sstable_bytes, run_identifier, options);
|
|
|
|
// Releases reference to cleaned sstable such that respective used disk space can be freed.
|
|
descriptor.release_exhausted = [compacting] (const std::vector<sstables::shared_sstable>& exhausted_sstables) {
|
|
compacting->release_compacting(exhausted_sstables);
|
|
};
|
|
|
|
return with_semaphore(_rewrite_sstables_sem, 1, [this, task, &cf, descriptor = std::move(descriptor), compacting] () mutable {
|
|
// Take write lock for cf to serialize cleanup/upgrade sstables/scrub with major compaction/reshape/reshard.
|
|
return with_lock(_compaction_state[&cf].lock.for_write(), [this, task, &cf, descriptor = std::move(descriptor), compacting] () mutable {
|
|
_stats.pending_tasks--;
|
|
_stats.active_tasks++;
|
|
task->setup_new_compaction();
|
|
task->output_run_identifier = descriptor.run_identifier;
|
|
compaction_backlog_tracker user_initiated(std::make_unique<user_initiated_backlog_tracker>(_compaction_controller.backlog_of_shares(200), _available_memory));
|
|
return do_with(std::move(user_initiated), [this, &cf, descriptor = std::move(descriptor), task] (compaction_backlog_tracker& bt) mutable {
|
|
return with_scheduling_group(_maintenance_sg.cpu, [this, &cf, descriptor = std::move(descriptor), task]() mutable {
|
|
return cf.compact_sstables(std::move(descriptor), task->compaction_data);
|
|
});
|
|
});
|
|
});
|
|
}).then_wrapped([this, task, compacting] (future<> f) mutable {
|
|
task->finish_compaction();
|
|
_stats.active_tasks--;
|
|
if (!can_proceed(task)) {
|
|
maybe_stop_on_error(std::move(f), stop_iteration::yes);
|
|
return make_ready_future<stop_iteration>(stop_iteration::yes);
|
|
}
|
|
if (maybe_stop_on_error(std::move(f))) {
|
|
_stats.pending_tasks++;
|
|
return put_task_to_sleep(task).then([] {
|
|
return make_ready_future<stop_iteration>(stop_iteration::no);
|
|
});
|
|
}
|
|
_stats.completed_tasks++;
|
|
reevaluate_postponed_compactions();
|
|
return make_ready_future<stop_iteration>(stop_iteration::yes);
|
|
});
|
|
});
|
|
}).finally([this, task, sstables = std::move(sstables)] {
|
|
_stats.pending_tasks -= sstables->size();
|
|
_tasks.remove(task);
|
|
});
|
|
|
|
return task->compaction_done.get_future().then([task] {});
|
|
}
|
|
|
|
future<> compaction_manager::perform_sstable_scrub_validate_mode(column_family* cf) {
|
|
// All sstables must be included, even the ones being compacted, such that everything in table is validated.
|
|
auto all_sstables = boost::copy_range<std::vector<sstables::shared_sstable>>(*cf->get_sstables());
|
|
return run_custom_job(cf, sstables::compaction_type::Scrub, [this, &cf = *cf, sstables = std::move(all_sstables)] (sstables::compaction_data& info) mutable -> future<> {
|
|
class pending_tasks {
|
|
compaction_manager::stats& _stats;
|
|
size_t _n;
|
|
public:
|
|
pending_tasks(compaction_manager::stats& stats, size_t n) : _stats(stats), _n(n) { _stats.pending_tasks += _n; }
|
|
~pending_tasks() { _stats.pending_tasks -= _n; }
|
|
void operator--(int) {
|
|
--_stats.pending_tasks;
|
|
--_n;
|
|
}
|
|
};
|
|
pending_tasks pending(_stats, sstables.size());
|
|
|
|
while (!sstables.empty()) {
|
|
auto sst = sstables.back();
|
|
sstables.pop_back();
|
|
|
|
try {
|
|
co_await with_scheduling_group(_maintenance_sg.cpu, [&] () {
|
|
auto desc = sstables::compaction_descriptor(
|
|
{ sst },
|
|
{},
|
|
_maintenance_sg.io,
|
|
sst->get_sstable_level(),
|
|
sstables::compaction_descriptor::default_max_sstable_bytes,
|
|
sst->run_identifier(),
|
|
sstables::compaction_type_options::make_scrub(sstables::compaction_type_options::scrub::mode::validate));
|
|
return compact_sstables(std::move(desc), info, cf.as_table_state());
|
|
});
|
|
} catch (sstables::compaction_stopped_exception&) {
|
|
throw; // let run_custom_job() handle this
|
|
} catch (storage_io_error&) {
|
|
throw; // let run_custom_job() handle this
|
|
} catch (...) {
|
|
// We are validating potentially corrupt sstables, errors are
|
|
// expected, just continue with the other sstables when seeing
|
|
// one.
|
|
_stats.errors++;
|
|
cmlog.error("Scrubbing in validate mode {} failed due to {}, continuing.", sst->get_filename(), std::current_exception());
|
|
}
|
|
|
|
pending--;
|
|
}
|
|
});
|
|
}
|
|
|
|
bool needs_cleanup(const sstables::shared_sstable& sst,
|
|
const dht::token_range_vector& sorted_owned_ranges,
|
|
schema_ptr s) {
|
|
auto first = sst->get_first_partition_key();
|
|
auto last = sst->get_last_partition_key();
|
|
auto first_token = dht::get_token(*s, first);
|
|
auto last_token = dht::get_token(*s, last);
|
|
dht::token_range sst_token_range = dht::token_range::make(first_token, last_token);
|
|
|
|
auto r = std::lower_bound(sorted_owned_ranges.begin(), sorted_owned_ranges.end(), first_token,
|
|
[] (const range<dht::token>& a, const dht::token& b) {
|
|
// check that range a is before token b.
|
|
return a.after(b, dht::token_comparator());
|
|
});
|
|
|
|
// return true iff sst partition range isn't fully contained in any of the owned ranges.
|
|
if (r != sorted_owned_ranges.end()) {
|
|
if (r->contains(sst_token_range, dht::token_comparator())) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
future<> compaction_manager::perform_cleanup(database& db, column_family* cf) {
|
|
if (check_for_cleanup(cf)) {
|
|
return make_exception_future<>(std::runtime_error(format("cleanup request failed: there is an ongoing cleanup on {}.{}",
|
|
cf->schema()->ks_name(), cf->schema()->cf_name())));
|
|
}
|
|
return seastar::async([this, cf, &db] {
|
|
auto schema = cf->schema();
|
|
auto sorted_owned_ranges = db.get_keyspace_local_ranges(schema->ks_name());
|
|
auto sstables = std::vector<sstables::shared_sstable>{};
|
|
const auto candidates = get_candidates(*cf);
|
|
std::copy_if(candidates.begin(), candidates.end(), std::back_inserter(sstables), [&sorted_owned_ranges, schema] (const sstables::shared_sstable& sst) {
|
|
seastar::thread::maybe_yield();
|
|
return sorted_owned_ranges.empty() || needs_cleanup(sst, sorted_owned_ranges, schema);
|
|
});
|
|
return std::tuple<dht::token_range_vector, std::vector<sstables::shared_sstable>>(sorted_owned_ranges, sstables);
|
|
}).then_unpack([this, cf, &db] (dht::token_range_vector owned_ranges, std::vector<sstables::shared_sstable> sstables) {
|
|
return rewrite_sstables(cf, sstables::compaction_type_options::make_cleanup(std::move(owned_ranges)),
|
|
[sstables = std::move(sstables)] (const table&) { return sstables; });
|
|
});
|
|
}
|
|
|
|
// Submit a column family to be upgraded and wait for its termination.
|
|
future<> compaction_manager::perform_sstable_upgrade(database& db, column_family* cf, bool exclude_current_version) {
|
|
using shared_sstables = std::vector<sstables::shared_sstable>;
|
|
return do_with(shared_sstables{}, [this, &db, cf, exclude_current_version](shared_sstables& tables) {
|
|
// since we might potentially have ongoing compactions, and we
|
|
// must ensure that all sstables created before we run are included
|
|
// in the re-write, we need to barrier out any previously running
|
|
// compaction.
|
|
return run_with_compaction_disabled(cf, [this, cf, &tables, exclude_current_version] {
|
|
auto last_version = cf->get_sstables_manager().get_highest_supported_format();
|
|
|
|
for (auto& sst : get_candidates(*cf)) {
|
|
// if we are a "normal" upgrade, we only care about
|
|
// tables with older versions, but potentially
|
|
// we are to actually rewrite everything. (-a)
|
|
if (!exclude_current_version || sst->get_version() < last_version) {
|
|
tables.emplace_back(sst);
|
|
}
|
|
}
|
|
return make_ready_future<>();
|
|
}).then([&db, cf] {
|
|
return db.get_keyspace_local_ranges(cf->schema()->ks_name());
|
|
}).then([this, &db, cf, &tables] (dht::token_range_vector owned_ranges) {
|
|
// doing a "cleanup" is about as compacting as we need
|
|
// to be, provided we get to decide the tables to process,
|
|
// and ignoring any existing operations.
|
|
// Note that we potentially could be doing multiple
|
|
// upgrades here in parallel, but that is really the users
|
|
// problem.
|
|
return rewrite_sstables(cf, sstables::compaction_type_options::make_upgrade(std::move(owned_ranges)), [&](auto&) mutable {
|
|
return std::exchange(tables, {});
|
|
});
|
|
});
|
|
});
|
|
}
|
|
|
|
// Submit a column family to be scrubbed and wait for its termination.
|
|
future<> compaction_manager::perform_sstable_scrub(column_family* cf, sstables::compaction_type_options::scrub::mode scrub_mode) {
|
|
if (scrub_mode == sstables::compaction_type_options::scrub::mode::validate) {
|
|
return perform_sstable_scrub_validate_mode(cf);
|
|
}
|
|
// since we might potentially have ongoing compactions, and we
|
|
// must ensure that all sstables created before we run are scrubbed,
|
|
// we need to barrier out any previously running compaction.
|
|
return run_with_compaction_disabled(cf, [this, cf, scrub_mode] {
|
|
return rewrite_sstables(cf, sstables::compaction_type_options::make_scrub(scrub_mode), [this] (const table& cf) {
|
|
return get_candidates(cf);
|
|
}, can_purge_tombstones::no);
|
|
});
|
|
}
|
|
|
|
future<> compaction_manager::remove(column_family* cf) {
|
|
// We need to guarantee that a task being stopped will not retry to compact
|
|
// a column family being removed.
|
|
// The requirement above is provided by stop_ongoing_compactions().
|
|
_postponed.erase(cf);
|
|
|
|
// Wait for all functions running under with_compaction_disabled_gate to terminate.
|
|
auto close_gate = _compaction_state[cf].with_compaction_disabled_gate.close();
|
|
|
|
// Wait for the termination of an ongoing compaction on cf, if any.
|
|
co_await when_all_succeed(stop_ongoing_compactions("column family removal", cf), std::move(close_gate));
|
|
#ifdef DEBUG
|
|
assert(std::find_if(_tasks.begin(), _tasks.end(), [cf] (auto& task) { return task->compacting_cf == cf; }) == _tasks.end());
|
|
#endif
|
|
_compaction_state.erase(cf);
|
|
co_return;
|
|
}
|
|
|
|
const std::vector<sstables::compaction_info> compaction_manager::get_compactions() const {
|
|
auto to_info = [] (const lw_shared_ptr<task>& t) {
|
|
sstables::compaction_info ret;
|
|
ret.compaction_uuid = t->compaction_data.compaction_uuid;
|
|
ret.type = t->type;
|
|
ret.ks_name = t->compacting_cf->schema()->ks_name();
|
|
ret.cf_name = t->compacting_cf->schema()->cf_name();
|
|
ret.total_partitions = t->compaction_data.total_partitions;
|
|
ret.total_keys_written = t->compaction_data.total_keys_written;
|
|
return ret;
|
|
};
|
|
using ret = std::vector<sstables::compaction_info>;
|
|
return boost::copy_range<ret>(_tasks | boost::adaptors::filtered(std::mem_fn(&task::compaction_running)) | boost::adaptors::transformed(to_info));
|
|
}
|
|
|
|
void compaction_manager::stop_compaction(sstring type) {
|
|
sstables::compaction_type target_type;
|
|
try {
|
|
target_type = sstables::to_compaction_type(type);
|
|
} catch (...) {
|
|
throw std::runtime_error(format("Compaction of type {} cannot be stopped by compaction manager: {}", type.c_str(), std::current_exception()));
|
|
}
|
|
// FIXME: switch to task_stop(), and wait for their termination, so API user can know when compactions actually stopped.
|
|
for (auto& task : _tasks) {
|
|
if (task->compaction_running && target_type == task->type) {
|
|
task->compaction_data.stop("user request");
|
|
}
|
|
}
|
|
}
|
|
|
|
void compaction_manager::propagate_replacement(column_family* cf,
|
|
const std::vector<sstables::shared_sstable>& removed, const std::vector<sstables::shared_sstable>& added) {
|
|
for (auto& task : _tasks) {
|
|
if (task->compacting_cf == cf && task->compaction_running) {
|
|
task->compaction_data.pending_replacements.push_back({ removed, added });
|
|
}
|
|
}
|
|
}
|
|
|
|
double compaction_backlog_tracker::backlog() const {
|
|
return _disabled ? compaction_controller::disable_backlog : _impl->backlog(_ongoing_writes, _ongoing_compactions);
|
|
}
|
|
|
|
void compaction_backlog_tracker::add_sstable(sstables::shared_sstable sst) {
|
|
if (_disabled || !sstable_belongs_to_tracker(sst)) {
|
|
return;
|
|
}
|
|
_ongoing_writes.erase(sst);
|
|
try {
|
|
_impl->add_sstable(std::move(sst));
|
|
} catch (...) {
|
|
cmlog.warn("Disabling backlog tracker due to exception {}", std::current_exception());
|
|
disable();
|
|
}
|
|
}
|
|
|
|
void compaction_backlog_tracker::remove_sstable(sstables::shared_sstable sst) {
|
|
if (_disabled || !sstable_belongs_to_tracker(sst)) {
|
|
return;
|
|
}
|
|
|
|
_ongoing_compactions.erase(sst);
|
|
try {
|
|
_impl->remove_sstable(std::move(sst));
|
|
} catch (...) {
|
|
cmlog.warn("Disabling backlog tracker due to exception {}", std::current_exception());
|
|
disable();
|
|
}
|
|
}
|
|
|
|
bool compaction_backlog_tracker::sstable_belongs_to_tracker(const sstables::shared_sstable& sst) {
|
|
return !sst->requires_view_building();
|
|
}
|
|
|
|
void compaction_backlog_tracker::register_partially_written_sstable(sstables::shared_sstable sst, backlog_write_progress_manager& wp) {
|
|
if (_disabled) {
|
|
return;
|
|
}
|
|
try {
|
|
_ongoing_writes.emplace(sst, &wp);
|
|
} catch (...) {
|
|
// We can potentially recover from adding ongoing compactions or writes when the process
|
|
// ends. The backlog will just be temporarily wrong. If we are are suffering from something
|
|
// more serious like memory exhaustion we will soon fail again in either add / remove and
|
|
// then we'll disable the tracker. For now, try our best.
|
|
cmlog.warn("backlog tracker couldn't register partially written SSTable to exception {}", std::current_exception());
|
|
}
|
|
}
|
|
|
|
void compaction_backlog_tracker::register_compacting_sstable(sstables::shared_sstable sst, backlog_read_progress_manager& rp) {
|
|
if (_disabled) {
|
|
return;
|
|
}
|
|
|
|
try {
|
|
_ongoing_compactions.emplace(sst, &rp);
|
|
} catch (...) {
|
|
cmlog.warn("backlog tracker couldn't register partially compacting SSTable to exception {}", std::current_exception());
|
|
}
|
|
}
|
|
|
|
void compaction_backlog_tracker::transfer_ongoing_charges(compaction_backlog_tracker& new_bt, bool move_read_charges) {
|
|
for (auto&& w : _ongoing_writes) {
|
|
new_bt.register_partially_written_sstable(w.first, *w.second);
|
|
}
|
|
|
|
if (move_read_charges) {
|
|
for (auto&& w : _ongoing_compactions) {
|
|
new_bt.register_compacting_sstable(w.first, *w.second);
|
|
}
|
|
}
|
|
_ongoing_writes = {};
|
|
_ongoing_compactions = {};
|
|
}
|
|
|
|
void compaction_backlog_tracker::revert_charges(sstables::shared_sstable sst) {
|
|
_ongoing_writes.erase(sst);
|
|
_ongoing_compactions.erase(sst);
|
|
}
|
|
|
|
compaction_backlog_tracker::~compaction_backlog_tracker() {
|
|
if (_manager) {
|
|
_manager->remove_backlog_tracker(this);
|
|
}
|
|
}
|
|
|
|
void compaction_backlog_manager::remove_backlog_tracker(compaction_backlog_tracker* tracker) {
|
|
_backlog_trackers.erase(tracker);
|
|
}
|
|
|
|
double compaction_backlog_manager::backlog() const {
|
|
try {
|
|
double backlog = 0;
|
|
|
|
for (auto& tracker: _backlog_trackers) {
|
|
backlog += tracker->backlog();
|
|
}
|
|
if (compaction_controller::backlog_disabled(backlog)) {
|
|
return compaction_controller::disable_backlog;
|
|
} else {
|
|
return backlog;
|
|
}
|
|
} catch (...) {
|
|
return _compaction_controller->backlog_of_shares(1000);
|
|
}
|
|
}
|
|
|
|
void compaction_backlog_manager::register_backlog_tracker(compaction_backlog_tracker& tracker) {
|
|
tracker._manager = this;
|
|
_backlog_trackers.insert(&tracker);
|
|
}
|
|
|
|
compaction_backlog_manager::~compaction_backlog_manager() {
|
|
for (auto* tracker : _backlog_trackers) {
|
|
tracker->_manager = nullptr;
|
|
}
|
|
}
|