1/19/2024 0 Comments Postgresql alter table migration![]() ![]() ![]() Ideal for large databases and for customers having limited downtime requirements. No restrictions in terms of database objects it can handle Simple, easy and less complex to execute. The following table gives an overview of Offline vs Online migration. A cutover is performed when the flexible server is in complete sync with the single server resulting in minimal downtime. The initial copy of the databases is followed by replication to keep flexible server in sync with the single server. Online Migration - In an online migration, applications connecting to your single server aren't stopped while database(s) are copied to flexible server. Offline Migration – In an offline migration, all applications connecting to your single server are stopped and the database(s) is copied to flexible server. Let us first look at the methods you can consider performing the migration from Single server to Flexible server. How to migrate from Single Server to Flexible Server? Security - Flexible server offers multiple layers of information protection and encryption to protect your data.Ī feature-set comparison between Single server and Flexible server is available here.Īll the learnings acquired by running customer workloads on Azure database for PostgreSQL - Single Server is incorporated into Flexible server and we recommend using Flexible server for all your new PostgreSQL deployments on Azure. High Availability - Flexible server supports HA within same availability zone and across availability zones by configuring a warm standby server that is in sync with the primary. Single server doesn't have this flexibility. Server Parameters - Flexible server offers a richer set of server parameters when compared to Single server for server configuration and tuning.Ĭustom Maintenance Window - You can schedule the maintenance window of flexible server for a specific day and time of the week. This option isn't available in Single server.Ĭonnection Pooling - Flexible server has a built-in connection pooling mechanism using pgBouncer that can support thousands of active connections with low overhead. Minimized Latency – You can collocate your flexible server in the same availability zone as the application server that results in a minimal latency. Newer community versions of PostgreSQL will only be supported in flexible server. Support for new PG versions - Flexible server currently supports PG version 11 and onwards till version 14. Your compute tier billing is stopped immediately which allows you to have significant cost savings during development, testing and for time-bound predictable production workloads. Superior performance - Flexible server runs on Linux VM that is best suited to run PostgreSQL engine as compared to Windows environment, which is the case with Single Server.Ĭost Savings – Flexible server allows you to stop and start server on-demand to lower your TCO. In this article, we provide compelling reasons for single server customers to migrate to flexible server and a walk-through of tackling this migration in a simple, efficient and a hassle-free way. We recommend new customers to get started with flexible server and highly recommend existing single server customers to migrate to Flexible server to have the best experience of running PostgreSQL workloads on Azure. Azure Database for PostgreSQL - Single ServerĪzure Database for PostgreSQL - Flexible ServerĪzure Database for PostgreSQL powered by the PostgreSQL community edition is available in two deployment modes:įlexible Server is the next generation managed PostgreSQL service in Azure that provides maximum flexibility over your database, built-in cost-optimizations, and offers several improvements over Single Server. ![]()
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