数据并行加载 • 水平扩展：Share-Nothing 架构水平扩展，海量数据在线分析 • 行/列存储模型：行存储支持高并发在线分析，列存储支持全表数据高性能关联聚合 • 高可靠架构：支持分布式事务及ACID，双副本、主备切换透明，支持服务高可用 分 区 分 区 分 区 分 区 计算组 分 区 分 区 分 区 分 区 计算组 分 区 分 区 分 区 分 区 计算组 AnalyticDB

Postgres-XL • Scale-out RDBMS • MPP for OLAP • OLTP write and read scalability • Custer-wide ACID properties • Can also act as distributed key-value store • Currently based on PostgreSQL 9

terms and their meaning in the context of PostgreSQL and relational database systems in general. ACID Atomicity, Consistency, Isolation, and Durability. This set of proper- ties of database transactions the execution of a transaction, no partial results are visible after recovery. This is one of the ACID properties. Attribute An element with a certain name and data type found within a tuple. Autovacuum resolved by the time it commits, such a transaction is automatically rolled back. This is one of the ACID properties. Constraint A restriction on the values of data allowed within a table, or in attrib-

terms and their meaning in the context of PostgreSQL and relational database systems in general. ACID Atomicity, Consistency, Isolation, and Durability. This set of properties of database transactions the execution of a transaction, no partial results are visible after recovery. This is one of the ACID properties. Attribute An element with a certain name and data type found within a tuple. Autovacuum resolved by the time it commits, such a transaction is automatically rolled back. This is one of the ACID properties. Constraint A restriction on the values of data allowed within a table, or in attributes

terms and their meaning in the context of PostgreSQL and relational database systems in general. ACID Atomicity, Consistency, Isolation, and Durability. This set of properties of database transactions the execution of a transaction, no partial results are visible after recovery. This is one of the ACID properties. Attribute An element with a certain name and data type found within a tuple. Autovacuum resolved by the time it commits, such a transaction is automatically rolled back. This is one of the ACID properties. Constraint A restriction on the values of data allowed within a table, or in attributes

terms and their meaning in the context of PostgreSQL and relational database systems in general. ACID Atomicity, Consistency, Isolation, and Durability. This set of proper- ties of database transactions the execution of a transaction, no partial results are visible after recovery. This is one of the ACID properties. Attribute An element with a certain name and data type found within a tuple. Autovacuum resolved by the time it commits, such a transaction is automatically rolled back. This is one of the ACID properties. Constraint A restriction on the values of data allowed within a table, or in attrib-

terms and their meaning in the context of PostgreSQL and relational database systems in general. ACID Atomicity, Consistency, Isolation, and Durability. This set of proper- ties of database transactions the execution of a transaction, no partial results are visible after recovery. This is one of the ACID properties. Attribute An element with a certain name and data type found within a tuple. Autovacuum resolved by the time it commits, such a transaction is automatically rolled back. This is one of the ACID properties. Constraint A restriction on the values of data allowed within a table, or in attrib-

terms and their meaning in the context of PostgreSQL and relational database systems in general. ACID Atomicity, Consistency, Isolation, and Durability. This set of properties of database transactions the execution of a transaction, no partial results are visible after recovery. This is one of the ACID properties. Attribute An element with a certain name and data type found within a tuple. Autovacuum resolved by the time it commits, such a transaction is automatically rolled back. This is one of the ACID properties. Constraint A restriction on the values of data allowed within a table, or in attributes

terms and their meaning in the context of PostgreSQL and relational database systems in general. ACID Atomicity, Consistency, Isolation, and Durability. This set of properties of database transactions the execution of a transaction, no partial results are visible after recovery. This is one of the ACID properties. Attribute An element with a certain name and data type found within a tuple. Autovacuum resolved by the time it commits, such a transaction is automatically rolled back. This is one of the ACID properties. Constraint A restriction on the values of data allowed within a table, or in attributes

terms and their meaning in the context of PostgreSQL and relational database systems in general. ACID Atomicity, Consistency, Isolation, and Durability. This set of proper- ties of database transactions the execution of a transaction, no partial results are visible after recovery. This is one of the ACID properties. Attribute An element with a certain name and data type found within a tuple. Autovacuum resolved by the time it commits, such a transaction is automatically rolled back. This is one of the ACID properties. Constraint A restriction on the values of data allowed within a table, or in attrib-