a483915c62
Add a new virtual table `system.raft_state` that shows the currently operating Raft configuration for each present group. The schema is the same as `system.raft_snapshot_config` (the latter shows the config from the last snapshot). In the future we plan to add more columns to this table, showing more information (like the current leader and term), hence the generic name. Adding the table requires some plumbing of `sharded<raft_group_registry>&` through function parameters to make it accessible from `register_virtual_tables`, but it's mostly straightforward. Also added some APIs to `raft_group_registry` to list all groups and find a given group (returning `nullptr` if one isn't found, not throwing an exception).
819 lines
37 KiB
C++
819 lines
37 KiB
C++
/*
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* Copyright (C) 2018-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 <seastar/core/coroutine.hh>
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#include <seastar/coroutine/maybe_yield.hh>
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#include <seastar/coroutine/parallel_for_each.hh>
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#include <seastar/util/closeable.hh>
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#include "distributed_loader.hh"
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#include "replica/database.hh"
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#include "db/config.hh"
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#include "db/system_keyspace.hh"
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#include "db/system_distributed_keyspace.hh"
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#include "db/schema_tables.hh"
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#include "utils/lister.hh"
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#include "compaction/compaction.hh"
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#include "compaction/compaction_manager.hh"
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#include "sstables/sstables.hh"
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#include "sstables/sstables_manager.hh"
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#include "sstables/sstable_directory.hh"
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#include "service/priority_manager.hh"
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#include "auth/common.hh"
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#include "tracing/trace_keyspace_helper.hh"
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#include "db/view/view_update_checks.hh"
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#include <unordered_map>
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#include <boost/range/adaptor/map.hpp>
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#include <boost/range/algorithm/min_element.hpp>
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#include "db/view/view_update_generator.hh"
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#include "utils/directories.hh"
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extern logging::logger dblog;
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static const std::unordered_set<std::string_view> system_keyspaces = {
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db::system_keyspace::NAME, db::schema_tables::NAME
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};
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// Not super nice. Adding statefulness to the file.
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static std::unordered_set<sstring> load_prio_keyspaces;
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static bool population_started = false;
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void replica::distributed_loader::mark_keyspace_as_load_prio(const sstring& ks) {
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assert(!population_started);
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load_prio_keyspaces.insert(ks);
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}
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bool is_system_keyspace(std::string_view name) {
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return system_keyspaces.contains(name);
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}
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bool is_load_prio_keyspace(const sstring& name) {
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return load_prio_keyspaces.contains(name);
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}
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static const std::unordered_set<std::string_view> internal_keyspaces = {
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db::system_distributed_keyspace::NAME,
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db::system_distributed_keyspace::NAME_EVERYWHERE,
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db::system_keyspace::NAME,
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db::schema_tables::NAME,
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auth::meta::AUTH_KS,
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tracing::trace_keyspace_helper::KEYSPACE_NAME
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};
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bool is_internal_keyspace(std::string_view name) {
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return internal_keyspaces.contains(name);
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}
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namespace replica {
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static io_error_handler error_handler_for_upload_dir() {
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return [] (std::exception_ptr eptr) {
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// do nothing about sstable exception and caller will just rethrow it.
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};
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}
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io_error_handler error_handler_gen_for_upload_dir(disk_error_signal_type& dummy) {
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return error_handler_for_upload_dir();
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}
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// global_column_family_ptr provides a way to easily retrieve local instance of a given column family.
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class global_column_family_ptr {
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distributed<replica::database>& _db;
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table_id _id;
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private:
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replica::column_family& get() const { return _db.local().find_column_family(_id); }
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public:
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global_column_family_ptr(distributed<replica::database>& db, sstring ks_name, sstring cf_name)
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: _db(db)
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, _id(_db.local().find_column_family(ks_name, cf_name).schema()->id()) {
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}
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replica::column_family* operator->() const {
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return &get();
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}
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replica::column_family& operator*() const {
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return get();
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}
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};
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future<>
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distributed_loader::process_sstable_dir(sharded<sstables::sstable_directory>& dir, sstables::sstable_directory::process_flags flags) {
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co_await dir.invoke_on(0, [] (const sstables::sstable_directory& d) {
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return utils::directories::verify_owner_and_mode(d.sstable_dir());
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});
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co_await dir.invoke_on_all([&dir, flags] (sstables::sstable_directory& d) -> future<> {
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// Supposed to be called with the node either down or on behalf of maintenance tasks
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// like nodetool refresh
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co_await d.process_sstable_dir(flags);
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co_await d.move_foreign_sstables(dir);
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});
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co_await dir.invoke_on_all(&sstables::sstable_directory::commit_directory_changes);
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}
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future<>
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distributed_loader::lock_table(sharded<sstables::sstable_directory>& dir, sharded<replica::database>& db, sstring ks_name, sstring cf_name) {
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return dir.invoke_on_all([&db, ks_name, cf_name] (sstables::sstable_directory& d) {
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auto& table = db.local().find_column_family(ks_name, cf_name);
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d.store_phaser(table.write_in_progress());
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return make_ready_future<>();
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});
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}
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// Helper structure for resharding.
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//
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// Describes the sstables (represented by their foreign_sstable_open_info) that are shared and
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// need to be resharded. Each shard will keep one such descriptor, that contains the list of
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// SSTables assigned to it, and their total size. The total size is used to make sure we are
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// fairly balancing SSTables among shards.
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struct reshard_shard_descriptor {
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sstables::sstable_directory::sstable_info_vector info_vec;
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uint64_t uncompressed_data_size = 0;
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bool total_size_smaller(const reshard_shard_descriptor& rhs) const {
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return uncompressed_data_size < rhs.uncompressed_data_size;
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}
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uint64_t size() const {
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return uncompressed_data_size;
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}
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};
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// Collects shared SSTables from all shards and returns a vector containing them all.
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// This function assumes that the list of SSTables can be fairly big so it is careful to
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// manipulate it in a do_for_each loop (which yields) instead of using standard accumulators.
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future<sstables::sstable_directory::sstable_info_vector>
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collect_all_shared_sstables(sharded<sstables::sstable_directory>& dir) {
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auto info_vec = sstables::sstable_directory::sstable_info_vector();
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// We want to make sure that each distributed object reshards about the same amount of data.
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// Each sharded object has its own shared SSTables. We can use a clever algorithm in which they
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// all distributely figure out which SSTables to exchange, but we'll keep it simple and move all
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// their foreign_sstable_open_info to a coordinator (the shard who called this function). We can
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// move in bulk and that's efficient. That shard can then distribute the work among all the
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// others who will reshard.
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auto coordinator = this_shard_id();
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// We will first move all of the foreign open info to temporary storage so that we can sort
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// them. We want to distribute bigger sstables first.
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co_await dir.invoke_on_all([&info_vec, coordinator] (sstables::sstable_directory& d) -> future<> {
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co_await smp::submit_to(coordinator, [&] () -> future<> {
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for (auto& info : d.retrieve_shared_sstables()) {
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info_vec.push_back(std::move(info));
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co_await coroutine::maybe_yield();
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}
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});
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});
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co_return info_vec;
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}
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// Given a vector of shared sstables to be resharded, distribute it among all shards.
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// The vector is first sorted to make sure that we are moving the biggest SSTables first.
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//
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// Returns a reshard_shard_descriptor per shard indicating the work that each shard has to do.
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future<std::vector<reshard_shard_descriptor>>
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distribute_reshard_jobs(sstables::sstable_directory::sstable_info_vector source) {
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auto destinations = std::vector<reshard_shard_descriptor>(smp::count);
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std::sort(source.begin(), source.end(), [] (const sstables::foreign_sstable_open_info& a, const sstables::foreign_sstable_open_info& b) {
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// Sort on descending SSTable sizes.
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return a.uncompressed_data_size > b.uncompressed_data_size;
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});
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for (auto& info : source) {
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auto shard_it = boost::min_element(destinations, std::mem_fn(&reshard_shard_descriptor::total_size_smaller));
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shard_it->uncompressed_data_size += info.uncompressed_data_size;
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shard_it->info_vec.push_back(std::move(info));
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co_await coroutine::maybe_yield();
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}
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co_return destinations;
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}
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future<> run_resharding_jobs(sharded<sstables::sstable_directory>& dir, std::vector<reshard_shard_descriptor> reshard_jobs,
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sharded<replica::database>& db, sstring ks_name, sstring table_name, sstables::compaction_sstable_creator_fn creator) {
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uint64_t total_size = boost::accumulate(reshard_jobs | boost::adaptors::transformed(std::mem_fn(&reshard_shard_descriptor::size)), uint64_t(0));
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if (total_size == 0) {
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co_return;
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}
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auto start = std::chrono::steady_clock::now();
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dblog.info("{}", fmt::format("Resharding {} for {}.{}", sstables::pretty_printed_data_size(total_size), ks_name, table_name));
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co_await dir.invoke_on_all(coroutine::lambda([&] (sstables::sstable_directory& d) -> future<> {
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auto& table = db.local().find_column_family(ks_name, table_name);
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auto info_vec = std::move(reshard_jobs[this_shard_id()].info_vec);
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auto& cm = db.local().get_compaction_manager();
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auto max_threshold = table.schema()->max_compaction_threshold();
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co_await d.reshard(std::move(info_vec), cm, table, max_threshold, creator);
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co_await d.move_foreign_sstables(dir);
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}));
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auto duration = std::chrono::duration_cast<std::chrono::duration<float>>(std::chrono::steady_clock::now() - start);
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dblog.info("{}", fmt::format("Resharded {} for {}.{} in {:.2f} seconds, {}", sstables::pretty_printed_data_size(total_size), ks_name, table_name, duration.count(), sstables::pretty_printed_throughput(total_size, duration)));
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}
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// Global resharding function. Done in two parts:
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// - The first part spreads the foreign_sstable_open_info across shards so that all of them are
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// resharding about the same amount of data
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// - The second part calls each shard's distributed object to reshard the SSTables they were
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// assigned.
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future<>
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distributed_loader::reshard(sharded<sstables::sstable_directory>& dir, sharded<replica::database>& db, sstring ks_name, sstring table_name, sstables::compaction_sstable_creator_fn creator) {
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auto all_jobs = co_await collect_all_shared_sstables(dir);
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auto destinations = co_await distribute_reshard_jobs(std::move(all_jobs));
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co_await run_resharding_jobs(dir, std::move(destinations), db, ks_name, table_name, std::move(creator));
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}
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future<sstables::generation_type>
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highest_generation_seen(sharded<sstables::sstable_directory>& directory) {
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return directory.map_reduce0(std::mem_fn(&sstables::sstable_directory::highest_generation_seen), sstables::generation_from_value(0), [] (sstables::generation_type a, sstables::generation_type b) {
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return std::max(a, b);
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});
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}
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future<sstables::sstable::version_types>
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highest_version_seen(sharded<sstables::sstable_directory>& dir, sstables::sstable_version_types system_version) {
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using version = sstables::sstable_version_types;
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return dir.map_reduce0(std::mem_fn(&sstables::sstable_directory::highest_version_seen), system_version, [] (version a, version b) {
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return std::max(a, b);
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});
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}
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future<>
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distributed_loader::reshape(sharded<sstables::sstable_directory>& dir, sharded<replica::database>& db, sstables::reshape_mode mode,
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sstring ks_name, sstring table_name, sstables::compaction_sstable_creator_fn creator,
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std::function<bool (const sstables::shared_sstable&)> filter) {
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auto start = std::chrono::steady_clock::now();
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auto total_size = co_await dir.map_reduce0([&dir, &db, ks_name = std::move(ks_name), table_name = std::move(table_name), creator = std::move(creator), mode, filter] (sstables::sstable_directory& d) {
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auto& table = db.local().find_column_family(ks_name, table_name);
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auto& cm = db.local().get_compaction_manager();
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return d.reshape(cm, table, creator, mode, filter);
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}, uint64_t(0), std::plus<uint64_t>());
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if (total_size > 0) {
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auto duration = std::chrono::duration_cast<std::chrono::duration<float>>(std::chrono::steady_clock::now() - start);
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dblog.info("{}", fmt::format("Reshaped {} in {:.2f} seconds, {}", sstables::pretty_printed_data_size(total_size), duration.count(), sstables::pretty_printed_throughput(total_size, duration)));
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}
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}
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// Loads SSTables into the main directory (or staging) and returns how many were loaded
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future<size_t>
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distributed_loader::make_sstables_available(sstables::sstable_directory& dir, sharded<replica::database>& db,
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sharded<db::view::view_update_generator>& view_update_generator, fs::path datadir, sstring ks, sstring cf) {
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auto& table = db.local().find_column_family(ks, cf);
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auto new_sstables = std::vector<sstables::shared_sstable>();
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co_await dir.do_for_each_sstable([&table, datadir = std::move(datadir), &new_sstables] (sstables::shared_sstable sst) -> future<> {
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auto gen = table.calculate_generation_for_new_table();
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dblog.trace("Loading {} into {}, new generation {}", sst->get_filename(), datadir.native(), gen);
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co_await sst->move_to_new_dir(datadir.native(), gen);
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// When loading an imported sst, set level to 0 because it may overlap with existing ssts on higher levels.
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sst->set_sstable_level(0);
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new_sstables.push_back(std::move(sst));
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});
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// nothing loaded
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if (new_sstables.empty()) {
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co_return 0;
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}
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co_await table.add_sstables_and_update_cache(new_sstables).handle_exception([&table] (std::exception_ptr ep) {
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dblog.error("Failed to load SSTables for {}.{}: {}. Aborting.", table.schema()->ks_name(), table.schema()->cf_name(), ep);
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abort();
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});
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co_await coroutine::parallel_for_each(new_sstables, [&view_update_generator, &table] (sstables::shared_sstable sst) -> future<> {
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if (sst->requires_view_building()) {
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co_await view_update_generator.local().register_staging_sstable(sst, table.shared_from_this());
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}
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});
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co_return new_sstables.size();
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}
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future<>
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distributed_loader::process_upload_dir(distributed<replica::database>& db, distributed<db::system_distributed_keyspace>& sys_dist_ks,
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distributed<db::view::view_update_generator>& view_update_generator, sstring ks, sstring cf) {
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seastar::thread_attributes attr;
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attr.sched_group = db.local().get_streaming_scheduling_group();
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return seastar::async(std::move(attr), [&db, &view_update_generator, &sys_dist_ks, ks = std::move(ks), cf = std::move(cf)] {
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global_column_family_ptr global_table(db, ks, cf);
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sharded<sstables::sstable_directory> directory;
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auto upload = fs::path(global_table->dir()) / sstables::upload_dir;
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directory.start(
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sharded_parameter([&global_table] { return std::ref(global_table->get_sstables_manager()); }),
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sharded_parameter([&global_table] { return global_table->schema(); }),
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upload, service::get_local_streaming_priority(),
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&error_handler_gen_for_upload_dir
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).get();
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auto stop = deferred_stop(directory);
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lock_table(directory, db, ks, cf).get();
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sstables::sstable_directory::process_flags flags {
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.need_mutate_level = true,
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.enable_dangerous_direct_import_of_cassandra_counters = db.local().get_config().enable_dangerous_direct_import_of_cassandra_counters(),
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.allow_loading_materialized_view = false,
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};
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process_sstable_dir(directory, flags).get();
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auto generation = highest_generation_seen(directory).get0();
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auto shard_generation_base = sstables::generation_value(generation) / smp::count + 1;
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// We still want to do our best to keep the generation numbers shard-friendly.
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// Each destination shard will manage its own generation counter.
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std::vector<std::atomic<int64_t>> shard_gen(smp::count);
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for (shard_id s = 0; s < smp::count; ++s) {
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shard_gen[s].store(shard_generation_base * smp::count + s, std::memory_order_relaxed);
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}
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reshard(directory, db, ks, cf, [&global_table, upload, &shard_gen] (shard_id shard) mutable {
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// we need generation calculated by instance of cf at requested shard
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auto gen = shard_gen[shard].fetch_add(smp::count, std::memory_order_relaxed);
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return global_table->make_sstable(upload.native(), sstables::generation_from_value(gen),
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global_table->get_sstables_manager().get_highest_supported_format(),
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sstables::sstable::format_types::big, &error_handler_gen_for_upload_dir);
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}).get();
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reshape(directory, db, sstables::reshape_mode::strict, ks, cf, [global_table, upload, &shard_gen] (shard_id shard) {
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auto gen = shard_gen[shard].fetch_add(smp::count, std::memory_order_relaxed);
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return global_table->make_sstable(upload.native(), sstables::generation_from_value(gen),
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global_table->get_sstables_manager().get_highest_supported_format(),
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sstables::sstable::format_types::big,
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&error_handler_gen_for_upload_dir);
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}, [] (const sstables::shared_sstable&) { return true; }).get();
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const bool use_view_update_path = db::view::check_needs_view_update_path(sys_dist_ks.local(), *global_table, streaming::stream_reason::repair).get0();
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auto datadir = upload.parent_path();
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if (use_view_update_path) {
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// Move to staging directory to avoid clashes with future uploads. Unique generation number ensures no collisions.
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datadir /= sstables::staging_dir;
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}
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size_t loaded = directory.map_reduce0([&db, ks, cf, datadir, &view_update_generator] (sstables::sstable_directory& dir) {
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return make_sstables_available(dir, db, view_update_generator, datadir, ks, cf);
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}, size_t(0), std::plus<size_t>()).get0();
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dblog.info("Loaded {} SSTables into {}", loaded, datadir.native());
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});
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}
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future<std::tuple<table_id, std::vector<std::vector<sstables::shared_sstable>>>>
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distributed_loader::get_sstables_from_upload_dir(distributed<replica::database>& db, sstring ks, sstring cf) {
|
|
return seastar::async([&db, ks = std::move(ks), cf = std::move(cf)] {
|
|
global_column_family_ptr global_table(db, ks, cf);
|
|
sharded<sstables::sstable_directory> directory;
|
|
auto table_id = global_table->schema()->id();
|
|
auto upload = fs::path(global_table->dir()) / sstables::upload_dir;
|
|
|
|
directory.start(
|
|
sharded_parameter([&global_table] { return std::ref(global_table->get_sstables_manager()); }),
|
|
sharded_parameter([&global_table] { return global_table->schema(); }),
|
|
upload, service::get_local_streaming_priority(),
|
|
&error_handler_gen_for_upload_dir
|
|
).get();
|
|
|
|
auto stop = deferred_stop(directory);
|
|
|
|
std::vector<std::vector<sstables::shared_sstable>> sstables_on_shards(smp::count);
|
|
lock_table(directory, db, ks, cf).get();
|
|
sstables::sstable_directory::process_flags flags {
|
|
.need_mutate_level = true,
|
|
.enable_dangerous_direct_import_of_cassandra_counters = db.local().get_config().enable_dangerous_direct_import_of_cassandra_counters(),
|
|
.allow_loading_materialized_view = false,
|
|
.sort_sstables_according_to_owner = false,
|
|
};
|
|
process_sstable_dir(directory, flags).get();
|
|
directory.invoke_on_all([&sstables_on_shards] (sstables::sstable_directory& d) mutable {
|
|
sstables_on_shards[this_shard_id()] = d.get_unsorted_sstables();
|
|
}).get();
|
|
|
|
return std::make_tuple(table_id, std::move(sstables_on_shards));
|
|
});
|
|
}
|
|
|
|
future<> distributed_loader::cleanup_column_family_temp_sst_dirs(sstring sstdir) {
|
|
std::vector<future<>> futures;
|
|
|
|
co_await lister::scan_dir(sstdir, lister::dir_entry_types::of<directory_entry_type::directory>(), [&] (fs::path sstdir, directory_entry de) {
|
|
// push futures that remove files/directories into an array of futures,
|
|
// so that the supplied callback will not block scan_dir() from
|
|
// reading the next entry in the directory.
|
|
fs::path dirpath = sstdir / de.name;
|
|
if (sstables::sstable::is_temp_dir(dirpath)) {
|
|
dblog.info("Found temporary sstable directory: {}, removing", dirpath);
|
|
futures.push_back(io_check([dirpath = std::move(dirpath)] () { return lister::rmdir(dirpath); }));
|
|
}
|
|
return make_ready_future<>();
|
|
});
|
|
|
|
co_await when_all_succeed(futures.begin(), futures.end()).discard_result();
|
|
}
|
|
|
|
future<> distributed_loader::handle_sstables_pending_delete(sstring pending_delete_dir) {
|
|
std::vector<future<>> futures;
|
|
|
|
co_await lister::scan_dir(pending_delete_dir, lister::dir_entry_types::of<directory_entry_type::regular>(), [&futures] (fs::path dir, directory_entry de) {
|
|
// push nested futures that remove files/directories into an array of futures,
|
|
// so that the supplied callback will not block scan_dir() from
|
|
// reading the next entry in the directory.
|
|
fs::path file_path = dir / de.name;
|
|
if (file_path.extension() == ".tmp") {
|
|
dblog.info("Found temporary pending_delete log file: {}, deleting", file_path);
|
|
futures.push_back(remove_file(file_path.string()));
|
|
} else if (file_path.extension() == ".log") {
|
|
dblog.info("Found pending_delete log file: {}, replaying", file_path);
|
|
auto f = sstables::sstable_directory::replay_pending_delete_log(std::move(file_path));
|
|
futures.push_back(std::move(f));
|
|
} else {
|
|
dblog.debug("Found unknown file in pending_delete directory: {}, ignoring", file_path);
|
|
}
|
|
return make_ready_future<>();
|
|
});
|
|
|
|
co_await when_all_succeed(futures.begin(), futures.end()).discard_result();
|
|
}
|
|
|
|
class table_population_metadata {
|
|
distributed<replica::database>& _db;
|
|
sstring _ks;
|
|
sstring _cf;
|
|
global_column_family_ptr _global_table;
|
|
fs::path _base_path;
|
|
std::unordered_map<sstring, lw_shared_ptr<sharded<sstables::sstable_directory>>> _sstable_directories;
|
|
sstables::sstable_version_types _highest_version = sstables::oldest_writable_sstable_format;
|
|
sstables::generation_type _highest_generation = sstables::generation_from_value(0);
|
|
|
|
public:
|
|
table_population_metadata(distributed<replica::database>& db, sstring ks, sstring cf)
|
|
: _db(db)
|
|
, _ks(std::move(ks))
|
|
, _cf(std::move(cf))
|
|
, _global_table(_db, _ks, _cf)
|
|
, _base_path(_global_table->dir())
|
|
{}
|
|
|
|
~table_population_metadata() {
|
|
// All directories must have been stopped
|
|
// using table_population_metadata::stop()
|
|
assert(_sstable_directories.empty());
|
|
}
|
|
|
|
future<> start() {
|
|
assert(this_shard_id() == 0);
|
|
for (auto subdir : { "", sstables::staging_dir, sstables::quarantine_dir }) {
|
|
co_await start_subdir(subdir);
|
|
}
|
|
|
|
co_await smp::invoke_on_all([this] {
|
|
_global_table->update_sstables_known_generation(_highest_generation);
|
|
return _global_table->disable_auto_compaction();
|
|
});
|
|
}
|
|
|
|
future<> stop() {
|
|
for (auto it = _sstable_directories.begin(); it != _sstable_directories.end(); it = _sstable_directories.erase(it)) {
|
|
co_await it->second->stop();
|
|
}
|
|
}
|
|
|
|
fs::path get_path(std::string_view subdir) {
|
|
return subdir.empty() ? _base_path : _base_path / subdir;
|
|
}
|
|
|
|
distributed<replica::database>& db() noexcept {
|
|
return _db;
|
|
}
|
|
|
|
const sstring& ks() const noexcept {
|
|
return _ks;
|
|
}
|
|
|
|
const sstring& cf() const noexcept {
|
|
return _cf;
|
|
}
|
|
|
|
global_column_family_ptr& global_table() noexcept {
|
|
return _global_table;
|
|
};
|
|
|
|
const global_column_family_ptr& global_table() const noexcept {
|
|
return _global_table;
|
|
};
|
|
|
|
const std::unordered_map<sstring, lw_shared_ptr<sharded<sstables::sstable_directory>>>& sstable_directories() const noexcept {
|
|
return _sstable_directories;
|
|
}
|
|
|
|
sstables::sstable::version_types highest_version() const noexcept {
|
|
return _highest_version;
|
|
}
|
|
|
|
sstables::generation_type highest_generation() const noexcept {
|
|
return _highest_generation;
|
|
}
|
|
|
|
private:
|
|
future<> start_subdir(sstring subdir);
|
|
};
|
|
|
|
future<> table_population_metadata::start_subdir(sstring subdir) {
|
|
sstring sstdir = get_path(subdir).native();
|
|
if (!co_await file_exists(sstdir)) {
|
|
co_return;
|
|
}
|
|
|
|
// First pass, cleanup temporary sstable directories and sstables pending delete.
|
|
co_await distributed_loader::cleanup_column_family_temp_sst_dirs(sstdir);
|
|
auto pending_delete_dir = sstdir + "/" + sstables::sstable::pending_delete_dir_basename();
|
|
auto exists = co_await file_exists(pending_delete_dir);
|
|
if (exists) {
|
|
co_await distributed_loader::handle_sstables_pending_delete(pending_delete_dir);
|
|
}
|
|
|
|
auto dptr = make_lw_shared<sharded<sstables::sstable_directory>>();
|
|
auto& directory = *dptr;
|
|
auto& global_table = _global_table;
|
|
auto& db = _db;
|
|
co_await directory.start(
|
|
sharded_parameter([&global_table] { return std::ref(global_table->get_sstables_manager()); }),
|
|
sharded_parameter([&global_table] { return global_table->schema(); }),
|
|
fs::path(sstdir), default_priority_class(),
|
|
default_io_error_handler_gen()
|
|
);
|
|
|
|
// directory must be stopped using table_population_metadata::stop below
|
|
_sstable_directories[subdir] = dptr;
|
|
|
|
co_await distributed_loader::lock_table(directory, _db, _ks, _cf);
|
|
|
|
sstables::sstable_directory::process_flags flags {
|
|
.throw_on_missing_toc = true,
|
|
.enable_dangerous_direct_import_of_cassandra_counters = db.local().get_config().enable_dangerous_direct_import_of_cassandra_counters(),
|
|
.allow_loading_materialized_view = true,
|
|
};
|
|
co_await distributed_loader::process_sstable_dir(directory, flags);
|
|
|
|
// If we are resharding system tables before we can read them, we will not
|
|
// know which is the highest format we support: this information is itself stored
|
|
// in the system tables. In that case we'll rely on what we find on disk: we'll
|
|
// at least not downgrade any files. If we already know that we support a higher
|
|
// format than the one we see then we use that.
|
|
auto sys_format = global_table->get_sstables_manager().get_highest_supported_format();
|
|
auto sst_version = co_await highest_version_seen(directory, sys_format);
|
|
auto generation = co_await highest_generation_seen(directory);
|
|
|
|
_highest_version = std::max(sst_version, _highest_version);
|
|
_highest_generation = std::max(generation, _highest_generation);
|
|
}
|
|
|
|
future<> distributed_loader::populate_column_family(table_population_metadata& metadata, sstring subdir, allow_offstrategy_compaction do_allow_offstrategy_compaction, must_exist dir_must_exist) {
|
|
auto& db = metadata.db();
|
|
const auto& ks = metadata.ks();
|
|
const auto& cf = metadata.cf();
|
|
auto sstdir = metadata.get_path(subdir).native();
|
|
dblog.debug("Populating {}/{}/{} allow_offstrategy_compaction={} must_exist={}", ks, cf, sstdir, do_allow_offstrategy_compaction, dir_must_exist);
|
|
|
|
assert(this_shard_id() == 0);
|
|
|
|
if (!co_await file_exists(sstdir)) {
|
|
if (dir_must_exist) {
|
|
throw std::runtime_error(format("Populating {}/{} failed: {} does not exist", metadata.ks(), metadata.cf(), sstdir));
|
|
}
|
|
co_return;
|
|
}
|
|
|
|
auto& global_table = metadata.global_table();
|
|
if (!metadata.sstable_directories().contains(subdir)) {
|
|
dblog.error("Could not find sstables directory {}.{}/{}", ks, cf, subdir);
|
|
}
|
|
auto& directory = *metadata.sstable_directories().at(subdir);
|
|
auto sst_version = metadata.highest_version();
|
|
|
|
co_await reshard(directory, db, ks, cf, [&global_table, sstdir, sst_version] (shard_id shard) mutable {
|
|
auto gen = smp::submit_to(shard, [&global_table] () {
|
|
return global_table->calculate_generation_for_new_table();
|
|
}).get0();
|
|
|
|
return global_table->make_sstable(sstdir, gen, sst_version, sstables::sstable::format_types::big);
|
|
});
|
|
|
|
// The node is offline at this point so we are very lenient with what we consider
|
|
// offstrategy.
|
|
// SSTables created by repair may not conform to compaction strategy layout goal
|
|
// because data segregation is only performed by compaction
|
|
// Instead of reshaping them on boot, let's add them to maintenance set and allow
|
|
// off-strategy compaction to reshape them. This will allow node to become online
|
|
// ASAP. Given that SSTables with repair origin are disjoint, they can be efficiently
|
|
// read from.
|
|
auto eligible_for_reshape_on_boot = [] (const sstables::shared_sstable& sst) {
|
|
return sst->get_origin() != sstables::repair_origin;
|
|
};
|
|
|
|
co_await reshape(directory, db, sstables::reshape_mode::relaxed, ks, cf, [global_table, sstdir, sst_version] (shard_id shard) {
|
|
auto gen = global_table->calculate_generation_for_new_table();
|
|
return global_table->make_sstable(sstdir, gen, sst_version, sstables::sstable::format_types::big);
|
|
}, eligible_for_reshape_on_boot);
|
|
|
|
co_await directory.invoke_on_all([global_table, &eligible_for_reshape_on_boot, do_allow_offstrategy_compaction] (sstables::sstable_directory& dir) -> future<> {
|
|
co_await dir.do_for_each_sstable([&global_table, &eligible_for_reshape_on_boot, do_allow_offstrategy_compaction] (sstables::shared_sstable sst) {
|
|
auto requires_offstrategy = sstables::offstrategy(do_allow_offstrategy_compaction && !eligible_for_reshape_on_boot(sst));
|
|
return global_table->add_sstable_and_update_cache(sst, requires_offstrategy);
|
|
});
|
|
if (do_allow_offstrategy_compaction) {
|
|
global_table->trigger_offstrategy_compaction();
|
|
}
|
|
});
|
|
}
|
|
|
|
future<> distributed_loader::populate_keyspace(distributed<replica::database>& db, sstring datadir, sstring ks_name) {
|
|
auto ksdir = datadir + "/" + ks_name;
|
|
auto& keyspaces = db.local().get_keyspaces();
|
|
auto i = keyspaces.find(ks_name);
|
|
if (i == keyspaces.end()) {
|
|
dblog.warn("Skipping undefined keyspace: {}", ks_name);
|
|
co_return;
|
|
}
|
|
|
|
dblog.info("Populating Keyspace {}", ks_name);
|
|
auto& ks = i->second;
|
|
auto& column_families = db.local().get_column_families();
|
|
|
|
co_await coroutine::parallel_for_each(ks.metadata()->cf_meta_data() | boost::adaptors::map_values, [&] (schema_ptr s) -> future<> {
|
|
auto uuid = s->id();
|
|
lw_shared_ptr<replica::column_family> cf = column_families[uuid];
|
|
sstring cfname = cf->schema()->cf_name();
|
|
auto sstdir = ks.column_family_directory(ksdir, cfname, uuid);
|
|
dblog.info("Keyspace {}: Reading CF {} id={} version={}", ks_name, cfname, uuid, s->version());
|
|
|
|
auto metadata = table_population_metadata(db, ks_name, cfname);
|
|
std::exception_ptr ex;
|
|
|
|
try {
|
|
co_await ks.make_directory_for_column_family(cfname, uuid);
|
|
|
|
co_await metadata.start();
|
|
co_await distributed_loader::populate_column_family(metadata, sstables::staging_dir, allow_offstrategy_compaction::no);
|
|
co_await distributed_loader::populate_column_family(metadata, sstables::quarantine_dir, allow_offstrategy_compaction::no, must_exist::no);
|
|
co_await distributed_loader::populate_column_family(metadata, "", allow_offstrategy_compaction::yes);
|
|
} catch (...) {
|
|
std::exception_ptr eptr = std::current_exception();
|
|
std::string msg =
|
|
format("Exception while populating keyspace '{}' with column family '{}' from file '{}': {}",
|
|
ks_name, cfname, sstdir, eptr);
|
|
dblog.error("Exception while populating keyspace '{}' with column family '{}' from file '{}': {}",
|
|
ks_name, cfname, sstdir, eptr);
|
|
try {
|
|
std::rethrow_exception(eptr);
|
|
} catch (sstables::compaction_stopped_exception& e) {
|
|
// swallow compaction stopped exception, to allow clean shutdown.
|
|
} catch (...) {
|
|
ex = std::make_exception_ptr(std::runtime_error(msg.c_str()));
|
|
}
|
|
}
|
|
|
|
co_await metadata.stop();
|
|
if (ex) {
|
|
co_await coroutine::return_exception_ptr(std::move(ex));
|
|
}
|
|
});
|
|
}
|
|
|
|
future<> distributed_loader::init_system_keyspace(sharded<db::system_keyspace>& sys_ks, distributed<replica::database>& db, distributed<service::storage_service>& ss, sharded<gms::gossiper>& g, sharded<service::raft_group_registry>& raft_gr, db::config& cfg, db::table_selector& tables) {
|
|
population_started = true;
|
|
|
|
return seastar::async([&sys_ks, &db, &ss, &cfg, &g, &raft_gr, &tables] {
|
|
sys_ks.invoke_on_all([&db, &ss, &cfg, &g, &raft_gr, &tables] (auto& sys_ks) {
|
|
return sys_ks.make(db, ss, g, raft_gr, cfg, tables);
|
|
}).get();
|
|
|
|
const auto& cfg = db.local().get_config();
|
|
for (auto& data_dir : cfg.data_file_directories()) {
|
|
for (auto ksname : system_keyspaces) {
|
|
if (!tables.contains_keyspace(ksname)) {
|
|
continue;
|
|
}
|
|
distributed_loader::populate_keyspace(db, data_dir, sstring(ksname)).get();
|
|
}
|
|
}
|
|
|
|
db.invoke_on_all([&tables] (replica::database& db) {
|
|
for (auto ksname : system_keyspaces) {
|
|
if (!tables.contains_keyspace(ksname)) {
|
|
continue;
|
|
}
|
|
auto& ks = db.find_keyspace(ksname);
|
|
for (auto& pair : ks.metadata()->cf_meta_data()) {
|
|
auto cfm = pair.second;
|
|
auto& cf = db.find_column_family(cfm);
|
|
cf.mark_ready_for_writes();
|
|
}
|
|
// for system keyspaces, we only do this post all population, and
|
|
// only as a consistency measure.
|
|
// change this if it is ever needed to sync system keyspace
|
|
// population
|
|
ks.mark_as_populated();
|
|
}
|
|
return make_ready_future<>();
|
|
}).get();
|
|
});
|
|
}
|
|
|
|
future<> distributed_loader::init_non_system_keyspaces(distributed<replica::database>& db,
|
|
distributed<service::storage_proxy>& proxy, sharded<db::system_keyspace>& sys_ks) {
|
|
return seastar::async([&db, &proxy, &sys_ks] {
|
|
db.invoke_on_all([&proxy, &sys_ks] (replica::database& db) {
|
|
return db.parse_system_tables(proxy, sys_ks);
|
|
}).get();
|
|
|
|
const auto& cfg = db.local().get_config();
|
|
using ks_dirs = std::unordered_multimap<sstring, sstring>;
|
|
|
|
ks_dirs dirs;
|
|
|
|
parallel_for_each(cfg.data_file_directories(), [&db, &dirs] (sstring directory) {
|
|
// we want to collect the directories first, so we can get a full set of potential dirs
|
|
return lister::scan_dir(directory, lister::dir_entry_types::of<directory_entry_type::directory>(), [&dirs] (fs::path datadir, directory_entry de) {
|
|
if (!is_system_keyspace(de.name)) {
|
|
dirs.emplace(de.name, datadir.native());
|
|
}
|
|
return make_ready_future<>();
|
|
});
|
|
}).get();
|
|
|
|
db.invoke_on_all([&dirs] (replica::database& db) {
|
|
for (auto& [name, ks] : db.get_keyspaces()) {
|
|
// mark all user keyspaces that are _not_ on disk as already
|
|
// populated.
|
|
if (!dirs.contains(ks.metadata()->name())) {
|
|
ks.mark_as_populated();
|
|
}
|
|
}
|
|
}).get();
|
|
|
|
for (bool prio_only : { true, false}) {
|
|
std::vector<future<>> futures;
|
|
|
|
// treat "dirs" as immutable to avoid modifying it while still in
|
|
// a range-iteration. Also to simplify the "finally"
|
|
for (auto i = dirs.begin(); i != dirs.end();) {
|
|
auto& ks_name = i->first;
|
|
auto j = i++;
|
|
|
|
/**
|
|
* Must process in two phases: Prio and non-prio.
|
|
* This looks like it is not needed. And it is not
|
|
* in open-source version. But essential for enterprise.
|
|
* Do _not_ remove or refactor away.
|
|
*/
|
|
if (prio_only != is_load_prio_keyspace(ks_name)) {
|
|
continue;
|
|
}
|
|
|
|
auto e = dirs.equal_range(ks_name).second;
|
|
// might have more than one dir for a keyspace iff data_file_directories is > 1 and
|
|
// somehow someone placed sstables in more than one of them for a given ks. (import?)
|
|
futures.emplace_back(parallel_for_each(j, e, [&](const std::pair<sstring, sstring>& p) {
|
|
auto& datadir = p.second;
|
|
return distributed_loader::populate_keyspace(db, datadir, ks_name);
|
|
}).finally([&] {
|
|
return db.invoke_on_all([ks_name] (replica::database& db) {
|
|
// can be false if running test environment
|
|
// or ks_name was just a borked directory not representing
|
|
// a keyspace in schema tables.
|
|
if (db.has_keyspace(ks_name)) {
|
|
db.find_keyspace(ks_name).mark_as_populated();
|
|
}
|
|
return make_ready_future<>();
|
|
});
|
|
}));
|
|
}
|
|
|
|
when_all_succeed(futures.begin(), futures.end()).discard_result().get();
|
|
}
|
|
|
|
db.invoke_on_all([] (replica::database& db) {
|
|
return parallel_for_each(db.get_non_system_column_families(), [] (lw_shared_ptr<replica::table> table) {
|
|
// Make sure this is called even if the table is empty
|
|
table->mark_ready_for_writes();
|
|
return make_ready_future<>();
|
|
});
|
|
}).get();
|
|
});
|
|
}
|
|
|
|
}
|