be synchronous? • If sharding across multiple instances: – Will you have distributed transactions? – Do you require distributed consistency? – What isolation level is being used? • Will there be a node OLAP • OLTP write and read scalability • Custer-wide ACID properties • Can also act as distributed key-value store • Currently based on PostgreSQL 9.5 Postgres Conference China 2016 中国用户大会 cannot be parallelized and pushed-down, must take place at originating PostgreSQL instance • No distributed consistency Postgres-XL can do all of the above It may be difficult to build a scalability solution

procedural languages And because of the liberal license, PostgreSQL can be used, modified, and distributed by anyone free of charge for any purpose, be it private, commercial, or academic. 2. A Brief History rules. • A short tutorial introducing regular SQL features as well as those of Postgres95 was distributed with the source code • GNU make (instead of BSD make) was used for the build. Also, Postgres95 will be generated by anyone else in the known uni- verse using the same algorithm. Therefore, for distributed systems, these identifiers provide a better uniqueness guarantee than sequence generators, which

Notice PostgreSQL is Copyright © 1996-2013 by the PostgreSQL Global Development Group and is distributed under the terms of the license of the University of California below. Postgres95 is Copyright procedural languages And because of the liberal license, PostgreSQL can be used, modified, and distributed by everyone free of charge for any purpose, be it private, commercial, or academic. 2. A Brief rules. • A short tutorial introducing regular SQL features as well as those of Postgres95 was distributed with the source code • GNU make (instead of BSD make) was used for the build. Also, Postgres95

procedural languages And because of the liberal license, PostgreSQL can be used, modified, and distributed by anyone free of charge for any purpose, be it private, commercial, or academic. 2. A Brief History rules. • A short tutorial introducing regular SQL features as well as those of Postgres95 was distributed with the source code • GNU make (instead of BSD make) was used for the build. Also, Postgres95 will be generated by anyone else in the known universe using the same algorithm. Therefore, for distributed systems, these identifiers provide a better uniqueness guarantee than sequence generators, which

procedural languages And because of the liberal license, PostgreSQL can be used, modified, and distributed by anyone free of charge for any purpose, be it private, commercial, or academic. 2. A Brief History rules. • A short tutorial introducing regular SQL features as well as those of Postgres95 was distributed with the source code • GNU make (instead of BSD make) was used for the build. Also, Postgres95 will be generated by anyone else in the known universe using the same algorithm. Therefore, for distributed systems, these identifiers provide a better uniqueness guarantee than sequence generators, which

procedural languages And because of the liberal license, PostgreSQL can be used, modified, and distributed by anyone free of charge for any purpose, be it private, commercial, or academic. 2. A Brief History rules. • A short tutorial introducing regular SQL features as well as those of Postgres95 was distributed with the source code • GNU make (instead of BSD make) was used for the build. Also, Postgres95 will be generated by anyone else in the known universe using the same algorithm. Therefore, for distributed systems, these identifiers provide a better uniqueness guarantee than sequence generators, which

procedural languages And because of the liberal license, PostgreSQL can be used, modified, and distributed by anyone free of charge for any purpose, be it private, commercial, or academic. 2. A Brief History rules. • A short tutorial introducing regular SQL features as well as those of Postgres95 was distributed with the source code • GNU make (instead of BSD make) was used for the build. Also, Postgres95 will be generated by anyone else in the known universe using the same algorithm. Therefore, for distributed systems, these identifiers provide a better uniqueness guarantee than sequence generators, which

Notice PostgreSQL is Copyright © 1996-2013 by the PostgreSQL Global Development Group and is distributed under the terms of the license of the University of California below. Postgres95 is Copyright procedural languages And because of the liberal license, PostgreSQL can be used, modified, and distributed by everyone free of charge for any purpose, be it private, commercial, or academic. 2. A Brief rules. • A short tutorial introducing regular SQL features as well as those of Postgres95 was distributed with the source code • GNU make (instead of BSD make) was used for the build. Also, Postgres95

Notice PostgreSQL is Copyright © 1996-2014 by the PostgreSQL Global Development Group and is distributed under the terms of the license of the University of California below. Postgres95 is Copyright procedural languages And because of the liberal license, PostgreSQL can be used, modified, and distributed by anyone free of charge for any purpose, be it private, commercial, or academic. 2. A Brief History rules. • A short tutorial introducing regular SQL features as well as those of Postgres95 was distributed with the source code • GNU make (instead of BSD make) was used for the build. Also, Postgres95

procedural languages And because of the liberal license, PostgreSQL can be used, modified, and distributed by anyone free of charge for any purpose, be it private, commercial, or academic. 2. A Brief History rules. • A short tutorial introducing regular SQL features as well as those of Postgres95 was distributed with the source code • GNU make (instead of BSD make) was used for the build. Also, Postgres95 will be generated by anyone else in the known universe using the same algorithm. Therefore, for distributed systems, these identifiers provide a better uniqueness guarantee than sequence generators, which