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config: Add --tablets-initial-scale-factor

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Previous patch taught tablets allocator to multiply the initial tablets
count by some value. This patch makes this factor configurable

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
This commit is contained in:
Pavel Emelyanov
2024-01-22 17:38:25 +03:00
parent eb3b237e05
commit d1d4620af8
3 changed files with 3 additions and 0 deletions
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1
db/config.cc
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@@ -1125,6 +1125,7 @@ db::config::config(std::shared_ptr<db::extensions> exts)
, minimum_replication_factor_warn_threshold(this, "minimum_replication_factor_warn_threshold", liveness::LiveUpdate, value_status::Used, 3, "") , minimum_replication_factor_warn_threshold(this, "minimum_replication_factor_warn_threshold", liveness::LiveUpdate, value_status::Used, 3, "")
, maximum_replication_factor_warn_threshold(this, "maximum_replication_factor_warn_threshold", liveness::LiveUpdate, value_status::Used, -1, "") , maximum_replication_factor_warn_threshold(this, "maximum_replication_factor_warn_threshold", liveness::LiveUpdate, value_status::Used, -1, "")
, maximum_replication_factor_fail_threshold(this, "maximum_replication_factor_fail_threshold", liveness::LiveUpdate, value_status::Used, -1, "") , maximum_replication_factor_fail_threshold(this, "maximum_replication_factor_fail_threshold", liveness::LiveUpdate, value_status::Used, -1, "")
, tablets_initial_scale_factor(this, "tablets_initial_scale_factor", value_status::Used, 1, "Calculated initial tablets are multiplied by this number")
, replication_strategy_warn_list(this, "replication_strategy_warn_list", liveness::LiveUpdate, value_status::Used, {locator::replication_strategy_type::simple}, "Controls which replication strategies to warn about when creating/altering a keyspace. Doesn't affect the pre-existing keyspaces.") , replication_strategy_warn_list(this, "replication_strategy_warn_list", liveness::LiveUpdate, value_status::Used, {locator::replication_strategy_type::simple}, "Controls which replication strategies to warn about when creating/altering a keyspace. Doesn't affect the pre-existing keyspaces.")
, replication_strategy_fail_list(this, "replication_strategy_fail_list", liveness::LiveUpdate, value_status::Used, {}, "Controls which replication strategies are disallowed to be used when creating/altering a keyspace. Doesn't affect the pre-existing keyspaces.") , replication_strategy_fail_list(this, "replication_strategy_fail_list", liveness::LiveUpdate, value_status::Used, {}, "Controls which replication strategies are disallowed to be used when creating/altering a keyspace. Doesn't affect the pre-existing keyspaces.")
, service_levels_interval(this, "service_levels_interval_ms", liveness::LiveUpdate, value_status::Used, 10000, "Controls how often service levels module polls configuration table") , service_levels_interval(this, "service_levels_interval_ms", liveness::LiveUpdate, value_status::Used, 10000, "Controls how often service levels module polls configuration table")

1
db/config.hh
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@@ -465,6 +465,7 @@ public:
named_value<int> minimum_replication_factor_warn_threshold; named_value<int> minimum_replication_factor_warn_threshold;
named_value<int> maximum_replication_factor_warn_threshold; named_value<int> maximum_replication_factor_warn_threshold;
named_value<int> maximum_replication_factor_fail_threshold; named_value<int> maximum_replication_factor_fail_threshold;
named_value<int> tablets_initial_scale_factor;
named_value<std::vector<enum_option<replication_strategy_restriction_t>>> replication_strategy_warn_list; named_value<std::vector<enum_option<replication_strategy_restriction_t>>> replication_strategy_warn_list;
named_value<std::vector<enum_option<replication_strategy_restriction_t>>> replication_strategy_fail_list; named_value<std::vector<enum_option<replication_strategy_restriction_t>>> replication_strategy_fail_list;

1
main.cc
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@@ -1364,6 +1364,7 @@ To start the scylla server proper, simply invoke as: scylla server (or just scyl
gossiper.local(), feature_service.local(), sys_ks.local(), group0_client}; gossiper.local(), feature_service.local(), sys_ks.local(), group0_client};
service::tablet_allocator::config tacfg; service::tablet_allocator::config tacfg;
tacfg.initial_tablets_scale = cfg->tablets_initial_scale_factor();
distributed<service::tablet_allocator> tablet_allocator; distributed<service::tablet_allocator> tablet_allocator;
if (cfg->check_experimental(db::experimental_features_t::feature::TABLETS) && if (cfg->check_experimental(db::experimental_features_t::feature::TABLETS) &&
!cfg->check_experimental(db::experimental_features_t::feature::CONSISTENT_TOPOLOGY_CHANGES)) { !cfg->check_experimental(db::experimental_features_t::feature::CONSISTENT_TOPOLOGY_CHANGES)) {