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https://github.com/scylladb/scylladb.git
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1bdcef6890
These features have been around for over 2 years and every reasonable deployment should have them enabled. The only case when those features could be not enabled is when the user has used enable_sstables_mc_format config flag to disable MC sstable format. This case has been eliminated by removing enable_sstables_mc_format config flag. Signed-off-by: Piotr Jastrzebski <piotr@scylladb.com>
105 lines
3.5 KiB
C++
105 lines
3.5 KiB
C++
/*
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* Copyright (C) 2020-present ScyllaDB
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*
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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 "sstables-format-selector.hh"
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#include "log.hh"
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#include "database.hh"
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#include "gms/gossiper.hh"
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#include "gms/feature_service.hh"
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#include "gms/versioned_value.hh"
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#include "db/system_keyspace.hh"
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namespace db {
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static logging::logger logger("format_selector");
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static const sstring SSTABLE_FORMAT_PARAM_NAME = "sstable_format";
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void feature_enabled_listener::on_enabled() {
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if (!_started) {
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_started = true;
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// FIXME -- discarded future
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(void)_selector.maybe_select_format(_format);
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}
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}
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sstables_format_selector::sstables_format_selector(gms::gossiper& g, sharded<gms::feature_service>& f, sharded<database>& db)
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: _gossiper(g)
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, _features(f)
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, _db(db)
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, _md_feature_listener(*this, sstables::sstable_version_types::md)
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{ }
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future<> sstables_format_selector::maybe_select_format(sstables::sstable_version_types new_format) {
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return with_gate(_sel, [this, new_format] {
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return do_maybe_select_format(new_format);
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});
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}
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future<> sstables_format_selector::do_maybe_select_format(sstables::sstable_version_types new_format) {
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return with_semaphore(_sem, 1, [this, new_format] {
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if (new_format <= _selected_format) {
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return make_ready_future<bool>(false);
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}
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return db::system_keyspace::set_scylla_local_param(SSTABLE_FORMAT_PARAM_NAME, to_string(new_format)).then([this, new_format] {
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return select_format(new_format);
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}).then([] { return true; });
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}).then([this] (bool update_features) {
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if (!update_features) {
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return make_ready_future<>();
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}
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return _gossiper.add_local_application_state(gms::application_state::SUPPORTED_FEATURES,
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gms::versioned_value::supported_features(_features.local().supported_feature_set()));
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});
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}
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future<> sstables_format_selector::start() {
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assert(this_shard_id() == 0);
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return read_sstables_format().then([this] {
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_features.local().cluster_supports_md_sstable().when_enabled(_md_feature_listener);
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return make_ready_future<>();
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});
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}
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future<> sstables_format_selector::stop() {
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return _sel.close();
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}
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future<> sstables_format_selector::read_sstables_format() {
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return db::system_keyspace::get_scylla_local_param(SSTABLE_FORMAT_PARAM_NAME).then([this] (std::optional<sstring> format_opt) {
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if (format_opt) {
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sstables::sstable_version_types format = sstables::from_string(*format_opt);
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return select_format(format);
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}
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return make_ready_future<>();
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});
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}
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future<> sstables_format_selector::select_format(sstables::sstable_version_types format) {
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logger.info("Selected {} sstables format", to_string(format));
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_selected_format = format;
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return _db.invoke_on_all([this] (database& db) {
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db.set_format(_selected_format);
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});
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}
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} // namespace sstables
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