269 lines
11 KiB
C++
269 lines
11 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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* Modified by ScyllaDB
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* Copyright (C) 2015 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 "dht/range_streamer.hh"
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#include "utils/fb_utilities.hh"
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#include "locator/snitch_base.hh"
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#include "database.hh"
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#include "gms/gossiper.hh"
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#include "gms/failure_detector.hh"
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#include "log.hh"
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#include "streaming/stream_plan.hh"
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#include "streaming/stream_state.hh"
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#include "service/storage_service.hh"
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namespace dht {
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logging::logger logger("range_streamer");
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using inet_address = gms::inet_address;
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static std::unordered_map<dht::token_range, std::unordered_set<inet_address>>
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unordered_multimap_to_unordered_map(const std::unordered_multimap<dht::token_range, inet_address>& multimap) {
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std::unordered_map<dht::token_range, std::unordered_set<inet_address>> ret;
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for (auto x : multimap) {
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ret[x.first].emplace(x.second);
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}
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return ret;
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}
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std::unordered_multimap<inet_address, dht::token_range>
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range_streamer::get_range_fetch_map(const std::unordered_multimap<dht::token_range, inet_address>& ranges_with_sources,
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const std::unordered_set<std::unique_ptr<i_source_filter>>& source_filters,
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const sstring& keyspace) {
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std::unordered_multimap<inet_address, dht::token_range> range_fetch_map_map;
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for (auto x : unordered_multimap_to_unordered_map(ranges_with_sources)) {
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const dht::token_range& range_ = x.first;
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const std::unordered_set<inet_address>& addresses = x.second;
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bool found_source = false;
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for (auto address : addresses) {
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if (address == utils::fb_utilities::get_broadcast_address()) {
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// If localhost is a source, we have found one, but we don't add it to the map to avoid streaming locally
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found_source = true;
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continue;
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}
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auto filtered = false;
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for (const auto& filter : source_filters) {
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if (!filter->should_include(address)) {
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filtered = true;
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break;
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}
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}
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if (filtered) {
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continue;
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}
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range_fetch_map_map.emplace(address, range_);
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found_source = true;
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break; // ensure we only stream from one other node for each range
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}
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if (!found_source) {
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throw std::runtime_error(sprint("unable to find sufficient sources for streaming range %s in keyspace %s", range_, keyspace));
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}
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}
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return range_fetch_map_map;
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}
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std::unordered_multimap<dht::token_range, inet_address>
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range_streamer::get_all_ranges_with_sources_for(const sstring& keyspace_name, dht::token_range_vector desired_ranges) {
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logger.debug("{} ks={}", __func__, keyspace_name);
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auto& ks = _db.local().find_keyspace(keyspace_name);
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auto& strat = ks.get_replication_strategy();
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auto tm = _metadata.clone_only_token_map();
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auto range_addresses = unordered_multimap_to_unordered_map(strat.get_range_addresses(tm));
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std::unordered_multimap<dht::token_range, inet_address> range_sources;
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auto& snitch = locator::i_endpoint_snitch::get_local_snitch_ptr();
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for (auto& desired_range : desired_ranges) {
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auto found = false;
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for (auto& x : range_addresses) {
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const range<token>& src_range = x.first;
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if (src_range.contains(desired_range, dht::tri_compare)) {
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std::unordered_set<inet_address>& addresses = x.second;
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auto preferred = snitch->get_sorted_list_by_proximity(_address, addresses);
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for (inet_address& p : preferred) {
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range_sources.emplace(desired_range, p);
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}
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found = true;
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}
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}
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if (!found) {
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throw std::runtime_error(sprint("No sources found for %s", desired_range));
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}
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}
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return range_sources;
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}
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std::unordered_multimap<dht::token_range, inet_address>
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range_streamer::get_all_ranges_with_strict_sources_for(const sstring& keyspace_name, dht::token_range_vector desired_ranges) {
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logger.debug("{} ks={}", __func__, keyspace_name);
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assert (_tokens.empty() == false);
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auto& ks = _db.local().find_keyspace(keyspace_name);
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auto& strat = ks.get_replication_strategy();
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//Active ranges
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auto metadata_clone = _metadata.clone_only_token_map();
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auto range_addresses = unordered_multimap_to_unordered_map(strat.get_range_addresses(metadata_clone));
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//Pending ranges
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metadata_clone.update_normal_tokens(_tokens, _address);
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auto pending_range_addresses = unordered_multimap_to_unordered_map(strat.get_range_addresses(metadata_clone));
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//Collects the source that will have its range moved to the new node
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std::unordered_multimap<dht::token_range, inet_address> range_sources;
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for (auto& desired_range : desired_ranges) {
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for (auto& x : range_addresses) {
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const range<token>& src_range = x.first;
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if (src_range.contains(desired_range, dht::tri_compare)) {
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std::vector<inet_address> old_endpoints(x.second.begin(), x.second.end());
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auto it = pending_range_addresses.find(desired_range);
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if (it == pending_range_addresses.end()) {
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throw std::runtime_error(sprint("Can not find desired_range = {} in pending_range_addresses", desired_range));
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}
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std::unordered_set<inet_address> new_endpoints = it->second;
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//Due to CASSANDRA-5953 we can have a higher RF then we have endpoints.
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//So we need to be careful to only be strict when endpoints == RF
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if (old_endpoints.size() == strat.get_replication_factor()) {
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auto it = std::remove_if(old_endpoints.begin(), old_endpoints.end(),
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[&new_endpoints] (inet_address ep) { return new_endpoints.count(ep); });
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old_endpoints.erase(it, old_endpoints.end());
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if (old_endpoints.size() != 1) {
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throw std::runtime_error(sprint("Expected 1 endpoint but found %d", old_endpoints.size()));
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}
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}
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range_sources.emplace(desired_range, old_endpoints.front());
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}
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}
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//Validate
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auto nr = range_sources.count(desired_range);
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if (nr < 1) {
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throw std::runtime_error(sprint("No sources found for %s", desired_range));
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}
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if (nr > 1) {
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throw std::runtime_error(sprint("Multiple endpoints found for %s", desired_range));
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}
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inet_address source_ip = range_sources.find(desired_range)->second;
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auto& gossiper = gms::get_local_gossiper();
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auto source_state = gossiper.get_endpoint_state_for_endpoint(source_ip);
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if (gossiper.is_enabled() && source_state && !source_state->is_alive()) {
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throw std::runtime_error(sprint("A node required to move the data consistently is down (%s). If you wish to move the data from a potentially inconsistent replica, restart the node with consistent_rangemovement=false", source_ip));
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}
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}
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return range_sources;
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}
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bool range_streamer::use_strict_sources_for_ranges(const sstring& keyspace_name) {
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auto& ks = _db.local().find_keyspace(keyspace_name);
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auto& strat = ks.get_replication_strategy();
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return !_db.local().is_replacing()
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&& use_strict_consistency()
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&& !_tokens.empty()
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&& _metadata.get_all_endpoints().size() != strat.get_replication_factor();
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}
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void range_streamer::add_ranges(const sstring& keyspace_name, dht::token_range_vector ranges) {
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auto ranges_for_keyspace = use_strict_sources_for_ranges(keyspace_name)
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? get_all_ranges_with_strict_sources_for(keyspace_name, ranges)
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: get_all_ranges_with_sources_for(keyspace_name, ranges);
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if (logger.is_enabled(logging::log_level::debug)) {
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for (auto& x : ranges_for_keyspace) {
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logger.debug("{} : range {} exists on {}", _description, x.first, x.second);
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}
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}
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std::unordered_map<inet_address, dht::token_range_vector> range_fetch_map;
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for (auto& x : get_range_fetch_map(ranges_for_keyspace, _source_filters, keyspace_name)) {
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range_fetch_map[x.first].emplace_back(x.second);
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}
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if (logger.is_enabled(logging::log_level::debug)) {
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for (auto& x : range_fetch_map) {
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logger.debug("{} : range {} from source {} for keyspace {}", _description, x.second, x.first, keyspace_name);
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}
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}
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_to_fetch.emplace(keyspace_name, std::move(range_fetch_map));
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}
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future<streaming::stream_state> range_streamer::fetch_async() {
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for (auto& fetch : _to_fetch) {
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const auto& keyspace = fetch.first;
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for (auto& x : fetch.second) {
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auto& source = x.first;
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auto& ranges = x.second;
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/* Send messages to respective folks to stream data over to me */
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if (logger.is_enabled(logging::log_level::debug)) {
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logger.debug("{}ing from {} ranges {}", _description, source, ranges);
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}
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_stream_plan.request_ranges(source, keyspace, ranges);
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}
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}
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return _stream_plan.execute();
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}
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std::unordered_multimap<inet_address, dht::token_range>
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range_streamer::get_work_map(const std::unordered_multimap<dht::token_range, inet_address>& ranges_with_source_target,
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const sstring& keyspace) {
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auto filter = std::make_unique<dht::range_streamer::failure_detector_source_filter>(gms::get_local_failure_detector());
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std::unordered_set<std::unique_ptr<i_source_filter>> source_filters;
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source_filters.emplace(std::move(filter));
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return get_range_fetch_map(ranges_with_source_target, source_filters, keyspace);
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}
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bool range_streamer::use_strict_consistency() {
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return service::get_local_storage_service().db().local().get_config().consistent_rangemovement();
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}
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} // dht
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