1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef DISTRIBUTEDDB_CONSTANT_H 17 #define DISTRIBUTEDDB_CONSTANT_H 18 19 #include <string> 20 21 namespace DistributedDB { 22 class DBConstant { 23 public: 24 static constexpr size_t MAX_KEY_SIZE = 1024; 25 static constexpr size_t MAX_VALUE_SIZE = 4194304; 26 static constexpr size_t MAX_BATCH_SIZE = 128; 27 static constexpr size_t MAX_DEV_LENGTH = 128; 28 static constexpr size_t MAX_TRANSACTION_ENTRY_SIZE = 128; 29 30 static constexpr size_t MAX_DATA_DIR_LENGTH = 512; 31 32 static constexpr size_t MAX_INKEYS_SIZE = 128; 33 34 static constexpr int DB_TYPE_LOCAL = 1; 35 static constexpr int DB_TYPE_MULTI_VER = 2; 36 static constexpr int DB_TYPE_SINGLE_VER = 3; 37 38 static constexpr int QUEUED_SYNC_LIMIT_DEFAULT = 32; 39 static constexpr int QUEUED_SYNC_LIMIT_MIN = 1; 40 static constexpr int QUEUED_SYNC_LIMIT_MAX = 4096; 41 42 static constexpr int MAX_DEVICES_SIZE = 100; 43 static constexpr int MAX_COMMIT_SIZE = 1000000; 44 static constexpr int MAX_ENTRIES_SIZE = 1000000; 45 46 static constexpr uint32_t MAX_COLUMN = 32767; 47 48 // In querySync, when getting query data finished, 49 // if the block size reach the half of max block size, will get deleted data next; 50 // if the block size not reach the half of max block size, will not get deleted data. 51 static constexpr float QUERY_SYNC_THRESHOLD = 0.50; 52 53 static constexpr uint64_t MAX_USER_ID_LENGTH = 128; 54 static constexpr uint64_t MAX_APP_ID_LENGTH = 128; 55 static constexpr uint64_t MAX_STORE_ID_LENGTH = 128; 56 57 static const std::string MULTI_SUB_DIR; 58 static const std::string SINGLE_SUB_DIR; 59 static const std::string LOCAL_SUB_DIR; 60 61 static const std::string MAINDB_DIR; 62 static const std::string METADB_DIR; 63 static const std::string CACHEDB_DIR; 64 65 static const std::string LOCAL_DATABASE_NAME; 66 static const std::string MULTI_VER_DATA_STORE; 67 static const std::string MULTI_VER_COMMIT_STORE; 68 static const std::string MULTI_VER_VALUE_STORE; 69 static const std::string MULTI_VER_META_STORE; 70 static const std::string SINGLE_VER_DATA_STORE; 71 static const std::string SINGLE_VER_META_STORE; 72 static const std::string SINGLE_VER_CACHE_STORE; 73 74 static const std::string SQLITE_URL_PRE; 75 static const std::string SQLITE_DB_EXTENSION; 76 static const std::string SQLITE_MEMDB_IDENTIFY; 77 static const std::string SCHEMA_KEY; 78 79 static const std::string PATH_POSTFIX_UNPACKED; 80 static const std::string PATH_POSTFIX_IMPORT_BACKUP; 81 static const std::string PATH_POSTFIX_IMPORT_ORIGIN; 82 static const std::string PATH_POSTFIX_IMPORT_DUP; 83 static const std::string PATH_POSTFIX_EXPORT_BACKUP; 84 static const std::string PATH_POSTFIX_DB_INCOMPLETE; // use for make sure create datebase and set label complete 85 86 static const std::string REKEY_FILENAME_POSTFIX_PRE; 87 static const std::string REKEY_FILENAME_POSTFIX_OK; 88 static const std::string UPGRADE_POSTFIX; 89 static const std::string SET_SECOPT_POSTFIX; // used for make sure meta split upgrade atomically 90 91 static const std::string PATH_BACKUP_POSTFIX; 92 93 static const std::string ID_CONNECTOR; 94 95 static const std::string DELETE_KVSTORE_REMOVING; 96 static const std::string DB_LOCK_POSTFIX; 97 98 static const std::string SUBSCRIBE_QUERY_PREFIX; 99 static const std::string TRIGGER_REFERENCES_NEW; 100 static const std::string TRIGGER_REFERENCES_OLD; 101 102 static const std::string UPDATE_META_FUNC; 103 104 static const std::string SYSTEM_TABLE_PREFIX; 105 106 static constexpr uint32_t AUTO_SYNC_TIMEOUT = 5000; // 5s 107 static constexpr uint32_t MANUAL_SYNC_TIMEOUT = 5000; // 5s 108 109 static const size_t MAX_NORMAL_PACK_ITEM_SIZE = 4000; 110 static const size_t MAX_HPMODE_PACK_ITEM_SIZE = 2000; // slide window mode to reduce last ack transfer time 111 112 static constexpr uint32_t MIN_MTU_SIZE = 1024; // 1KB 113 static constexpr uint32_t MAX_MTU_SIZE = 5242880; // 5MB 114 115 static constexpr uint32_t MIN_TIMEOUT = 5000; // 5s 116 static constexpr uint32_t MAX_TIMEOUT = 60000; // 60s 117 118 static constexpr uint8_t DEFAULT_COMPTRESS_RATE = 100; 119 120 static constexpr size_t MAX_SYNC_BLOCK_SIZE = 31457280; // 30MB 121 122 static constexpr int DOUBLE_PRECISION = 15; 123 static constexpr int MAX_DISTRIBUTED_TABLE_COUNT = 32; 124 125 static constexpr uint64_t MAX_LOG_SIZE_HIGH = 0x400000000ULL; // 16GB 126 static constexpr uint64_t MAX_LOG_SIZE_LOW = 0x400000ULL; // 4MB 127 static constexpr uint64_t MAX_LOG_SIZE_DEFAULT = 0x40000000ULL; // 1GB 128 129 static constexpr int DEF_LIFE_CYCLE_TIME = 60000; // 60S 130 131 static constexpr int RELATIONAL_LOG_TABLE_FIELD_NUM = 7; // field num is relational distributed log table 132 133 // For relational 134 static const std::string RELATIONAL_PREFIX; 135 static const std::string TIMESTAMP_ALIAS; 136 }; 137 } // namespace DistributedDB 138 139 #endif // DISTRIBUTEDDB_CONSTANT_H 140