以图搜图 AnalyticDB for PostgreSQL 产品架构 协调节点 OSS 分布式云存储服务 SQL Client/BI Tools 协调节点（Master Node） • 接收请求，制定分布式执行计划 计算组（Compute Groups） • 全并行分析计算 • 数据双副本存储 • 定期自动备份 OSS • 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

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PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://s2k-ftp.CS.Berkeley.EDU:8000/postgres/postgres.html lii Preface • functions • operators • aggregate and support was taking up large amounts of time that should have been 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html liii Preface devoted to database PostgreSQL web site for details. 5. http://wiki.postgresql.org 6. http://wiki.postgresql.org/wiki/Frequently_Asked_Questions 7. http://wiki.postgresql.org/wiki/Todo 8. http://www.postgresql.org lv Preface

PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://s2k-ftp.CS.Berkeley.EDU:8000/postgres/postgres.html xlviii Preface • functions • operators and support was taking up large amounts of time that should have been 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html xlix Preface devoted to database tation or through the mailing lists. Consider contributing your knowledge back. Read the mailing 5. http://www.postgresql.org li Preface lists and answer questions. If you learn something which is not

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PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://db.cs.berkeley.edu/postgres.html lvi Preface • functions • operators • aggregate functions and support was taking up large amounts of time that should have been 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html lvii Preface devoted to database PostgreSQL web site for details. 5. http://wiki.postgresql.org 6. http://wiki.postgresql.org/wiki/Frequently_Asked_Questions 7. http://wiki.postgresql.org/wiki/Todo 8. http://www.postgresql.org lix Preface

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