df0503afd6
Change the format of sync points to use host ID instead of IPs, to be consistent with the use of host IDs in hinted handoff module. Introduce sync point v3 format which is the same as v2 except it stores host IDs instead of IPs. The encoding of sync points now always uses the new v3 format with host IDs. The decoding supports both formats with host IDs and IPs, so a sync point contains now a variant of either types, and in the case of the new format the translation from IP to host ID is avoided.
83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
/*
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* Copyright (C) 2021-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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#pragma once
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#include <cstdint>
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#include <unordered_map>
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#include <vector>
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#include <seastar/core/sstring.hh>
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#include "gms/inet_address.hh"
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#include "db/commitlog/replay_position.hh"
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#include "locator/host_id.hh"
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namespace db {
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namespace hints {
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// A sync point is a collection of positions in hint queues which can be waited on.
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// The sync point encompasses one type of hints manager only.
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struct sync_point {
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using host_id_or_addr = std::variant<locator::host_id, gms::inet_address>;
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using shard_rps = std::unordered_map<host_id_or_addr, db::replay_position>;
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// ID of the host which created this sync point
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locator::host_id host_id;
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std::vector<shard_rps> regular_per_shard_rps;
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std::vector<shard_rps> mv_per_shard_rps;
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/// \brief Decodes a sync point from an encoded, textual form (a hexadecimal string).
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static sync_point decode(sstring_view s);
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/// \brief Encodes the sync point in a textual form (a hexadecimal string)
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sstring encode() const;
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bool operator==(const sync_point& other) const = default;
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};
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// IDL type
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// Contains per-endpoint and per-shard information about replay positions
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// for a particular type of hint queues (regular mutation hints or MV update hints)
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struct per_manager_sync_point_v1_or_v2 {
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std::vector<gms::inet_address> endpoints;
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std::vector<db::replay_position> flattened_rps;
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};
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// IDL type
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struct sync_point_v1_or_v2 {
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locator::host_id host_id;
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uint16_t shard_count;
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// Sync point information for regular mutation hints
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db::hints::per_manager_sync_point_v1_or_v2 regular_sp;
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// Sync point information for materialized view hints
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db::hints::per_manager_sync_point_v1_or_v2 mv_sp;
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};
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// IDL type
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// same as per_manager_sync_point_v1_or_v2 except that it stores the
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// endpoints as host_id instead of address
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struct per_manager_sync_point_v3 {
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std::vector<locator::host_id> endpoints;
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std::vector<db::replay_position> flattened_rps;
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};
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// IDL type
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struct sync_point_v3 {
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locator::host_id host_id;
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uint16_t shard_count;
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// Sync point information for regular mutation hints
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db::hints::per_manager_sync_point_v3 regular_sp;
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// Sync point information for materialized view hints
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db::hints::per_manager_sync_point_v3 mv_sp;
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};
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}
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}
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