SWJTU-ZhangLei commented on code in PR #38243: URL: https://github.com/apache/doris/pull/38243#discussion_r1732724162
########## cloud/src/meta-service/txn_lazy_committer.cpp: ########## @@ -0,0 +1,459 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#include "txn_lazy_committer.h" + +#include <chrono> + +#include "common/logging.h" +#include "common/util.h" +#include "meta-service/keys.h" +#include "meta-service/meta_service_helper.h" +#include "meta-service/meta_service_tablet_stats.h" + +using namespace std::chrono; + +namespace doris::cloud { + +void scan_tmp_rowset( + const std::string& instance_id, int64_t txn_id, std::shared_ptr<TxnKv> txn_kv, + MetaServiceCode& code, std::string& msg, int64_t* db_id, + std::vector<std::pair<std::string, doris::RowsetMetaCloudPB>>* tmp_rowsets_meta); + +void update_tablet_stats(const StatsTabletKeyInfo& info, const TabletStats& stats, + std::unique_ptr<Transaction>& txn, MetaServiceCode& code, + std::string& msg); + +void convert_tmp_rowsets( + const std::string& instance_id, int64_t txn_id, std::shared_ptr<TxnKv> txn_kv, + MetaServiceCode& code, std::string& msg, int64_t db_id, + std::vector<std::pair<std::string, doris::RowsetMetaCloudPB>>& tmp_rowsets_meta, + std::unordered_map<int64_t, TabletIndexPB>& tablet_ids) { + std::stringstream ss; + std::unique_ptr<Transaction> txn; + TxnErrorCode err = txn_kv->create_txn(&txn); + if (err != TxnErrorCode::TXN_OK) { + code = cast_as<ErrCategory::CREATE>(err); + ss << "failed to create txn, txn_id=" << txn_id << " err=" << err; + msg = ss.str(); + LOG(WARNING) << msg; + return; + } + + // partition_id -> VersionPB + std::unordered_map<int64_t, VersionPB> partition_versions; + // tablet_id -> stats + std::unordered_map<int64_t, TabletStats> tablet_stats; + + for (auto& [tmp_rowset_key, tmp_rowset_pb] : tmp_rowsets_meta) { + std::string tmp_rowst_data; + err = txn->get(tmp_rowset_key, &tmp_rowst_data); + if (TxnErrorCode::TXN_KEY_NOT_FOUND == err) { + // the tmp rowset has been converted + VLOG_DEBUG << "tmp rowset has been converted, key=" << hex(tmp_rowset_key); + continue; + } + + if (TxnErrorCode::TXN_OK != err) { + code = cast_as<ErrCategory::READ>(err); + ss << "failed to get tmp_rowset_key, txn_id=" << txn_id + << " key=" << hex(tmp_rowset_key) << " err=" << err; + msg = ss.str(); + LOG(WARNING) << msg; + return; + } + + if (!tablet_ids.contains(tmp_rowset_pb.tablet_id())) { + std::string tablet_idx_key = + meta_tablet_idx_key({instance_id, tmp_rowset_pb.tablet_id()}); + std::string tablet_idx_val; + err = txn->get(tablet_idx_key, &tablet_idx_val, true); + if (TxnErrorCode::TXN_OK != err) { + code = err == TxnErrorCode::TXN_KEY_NOT_FOUND ? MetaServiceCode::TXN_ID_NOT_FOUND + : cast_as<ErrCategory::READ>(err); + ss << "failed to get tablet idx, txn_id=" << txn_id + << " key=" << hex(tablet_idx_key) << " err=" << err; + msg = ss.str(); + LOG(WARNING) << msg; + return; + } + + TabletIndexPB tablet_idx_pb; + if (!tablet_idx_pb.ParseFromString(tablet_idx_val)) { + code = MetaServiceCode::PROTOBUF_PARSE_ERR; + ss << "failed to parse tablet idx pb txn_id=" << txn_id + << " key=" << hex(tablet_idx_key); + msg = ss.str(); + return; + } + tablet_ids.emplace(tmp_rowset_pb.tablet_id(), tablet_idx_pb); + } + const TabletIndexPB& tablet_idx_pb = tablet_ids[tmp_rowset_pb.tablet_id()]; + + if (!partition_versions.contains(tmp_rowset_pb.partition_id())) { + std::string ver_val; + std::string ver_key = partition_version_key( + {instance_id, db_id, tablet_idx_pb.table_id(), tmp_rowset_pb.partition_id()}); + err = txn->get(ver_key, &ver_val); + if (TxnErrorCode::TXN_OK != err) { + code = err == TxnErrorCode::TXN_KEY_NOT_FOUND ? MetaServiceCode::TXN_ID_NOT_FOUND + : cast_as<ErrCategory::READ>(err); + ss << "failed to get partiton version, txn_id=" << txn_id << " key=" << hex(ver_key) + << " err=" << err; + msg = ss.str(); + LOG(WARNING) << msg; + return; + } + VersionPB version_pb; + if (!version_pb.ParseFromString(ver_val)) { + code = MetaServiceCode::PROTOBUF_PARSE_ERR; + ss << "failed to parse version pb txn_id=" << txn_id << " key=" << hex(ver_key); + msg = ss.str(); + return; + } + LOG(INFO) << "txn_id=" << txn_id << " key=" << hex(ver_key) + << " version_pb:" << version_pb.ShortDebugString(); + DCHECK(version_pb.has_txn_id()); + DCHECK(version_pb.txn_id() == txn_id); + partition_versions.emplace(tmp_rowset_pb.partition_id(), version_pb); + } + + const VersionPB& version_pb = partition_versions[tmp_rowset_pb.partition_id()]; + + std::string rowset_key = + meta_rowset_key({instance_id, tmp_rowset_pb.tablet_id(), version_pb.version()}); + std::string rowset_val; + err = txn->get(rowset_key, &rowset_val); + if (TxnErrorCode::TXN_OK == err) { + continue; + } + + if (err != TxnErrorCode::TXN_KEY_NOT_FOUND) { + code = cast_as<ErrCategory::READ>(err); + ss << "failed to get rowset_key, txn_id=" << txn_id << " key=" << hex(rowset_key) + << " err=" << err; + msg = ss.str(); + LOG(WARNING) << msg; + return; + } + DCHECK(err == TxnErrorCode::TXN_KEY_NOT_FOUND); + + tmp_rowset_pb.set_start_version(version_pb.version()); + tmp_rowset_pb.set_end_version(version_pb.version()); + + rowset_val.clear(); + if (!tmp_rowset_pb.SerializeToString(&rowset_val)) { + code = MetaServiceCode::PROTOBUF_SERIALIZE_ERR; + ss << "failed to serialize rowset_meta, txn_id=" << txn_id + << " key=" << hex(rowset_key); + msg = ss.str(); + return; + } + + txn->put(rowset_key, rowset_val); + LOG(INFO) << "xxx put rowset_key=" << hex(rowset_key) << " txn_id=" << txn_id + << " rowset_size=" << rowset_key.size() + rowset_val.size(); + + // Accumulate affected rows + auto& stats = tablet_stats[tmp_rowset_pb.tablet_id()]; + stats.data_size += tmp_rowset_pb.data_disk_size(); + stats.num_rows += tmp_rowset_pb.num_rows(); + ++stats.num_rowsets; + stats.num_segs += tmp_rowset_pb.num_segments(); + } + + DCHECK(partition_versions.size() == 1); + + for (auto& [tablet_id, stats] : tablet_stats) { + DCHECK(tablet_ids.count(tablet_id)); + auto& tablet_idx = tablet_ids[tablet_id]; + StatsTabletKeyInfo info {instance_id, tablet_idx.table_id(), tablet_idx.index_id(), + tablet_idx.partition_id(), tablet_id}; + update_tablet_stats(info, stats, txn, code, msg); + if (code != MetaServiceCode::OK) return; + } + + err = txn->commit(); Review Comment: > what if the commit returns errors like > > 1. value exceeds max bytes > 2. transaction too old return error to ms client -- This is an automated message from the Apache Git Service. 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