a8c36aad0b
We optimise memory usage of replication_map by storing endpoints list only once in case of natural_endpoints_depend_on_token() == false. For simplicity, this list is stored in the same unordered_map with special key default_replication_map_key. We inline both get_natural_endpoints and for_each_natural_endpoint_until from abstract_replication_strategy into vnode_erm since now the overrides in local and everywhere strategies are redundant. The default implementation works for them as empty sorted_tokens() is not a problem, we store endpoints with a special key. Function do_get_natural_endpoints was extracted, since get_natural_endpoints returns by val, but for_each_natural_endpoint_until reference in sufficient.
43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
/*
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* Copyright (C) 2015-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#include <algorithm>
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#include "local_strategy.hh"
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#include "utils/class_registrator.hh"
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#include "utils/fb_utilities.hh"
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namespace locator {
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local_strategy::local_strategy(const replication_strategy_config_options& config_options) :
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abstract_replication_strategy(config_options, replication_strategy_type::local) {
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_natural_endpoints_depend_on_token = false;
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}
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future<endpoint_set> local_strategy::calculate_natural_endpoints(const token& t, const token_metadata& tm) const {
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return make_ready_future<endpoint_set>(endpoint_set({utils::fb_utilities::get_broadcast_address()}));
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}
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void local_strategy::validate_options(const gms::feature_service&) const {
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}
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std::optional<std::unordered_set<sstring>> local_strategy::recognized_options(const topology&) const {
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// LocalStrategy doesn't expect any options.
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return {};
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}
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size_t local_strategy::get_replication_factor(const token_metadata&) const {
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return 1;
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}
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using registry = class_registrator<abstract_replication_strategy, local_strategy, const replication_strategy_config_options&>;
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static registry registrator("org.apache.cassandra.locator.LocalStrategy");
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static registry registrator_short_name("LocalStrategy");
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}
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