Though I had some trouble getting started with AWS RDS, IMHO, basing the CDC on WAL remains a more reliable solution than writing my own system to detect data changes in the database.My name is Sigal Shaharabani — I am a data engineering technical leader in SELECT * FROM pg_create_logical_replication_slot(
Some of the earlier versions may not be available for upgrade to avoid the possibility of upgrading to a version that was released by the community before your current version. Amazon is an Equal Opportunity Employer: Replication configuration of our standalone PostgreSQL server is the only thing needs to be … Click Databases on the left sidebar and you will be taken to a page that looks like this. It connects to the source and Amazon Relational Database Service Amazon RDS makes it easy to set up, operate, and scale a relational database in the cloud. This is one of the widely used services for data store for low latency and transactional data storage and processing. Once we decided to migrate to Aurora, we had 3 options to do it: Aurora Serverless for PostgreSQL is GA since June 2019 and we expect DATA API support very soon – UPDATE: September 2019, PostgreSQL support added To upgrade, select the "Modify" option on the AWS Management Console corresponding to the DB instance you want to upgrade, choose the version of Aurora PostgreSQL 11 you want to upgrade to, and proceed with the wizard. In this tutorial I will discuss How to Backup and Restore a AWS RDS PostgreSQL Database. migrations, and Oracle to Amazon Aurora with PostgreSQL compatibility migration best practices, we recommend using AWS SCT as the first step of the process. Although, Aurora’s official docs only claimed up to a 3x increase in throughput performance over stock PostgreSQL 9.6, testimonials claimed that performance increased 12x, just by doing the migration to Aurora. In order to scale horizontally applications must take advantage of AWS SDK APIs, for example in order to achieve fast failover.. High Availability. You can deploy Aurora PostgreSQL or MySQL database as a Server or it can be deployed in Serverless mode. AWS RDS Aurora is a MySQL and Postgres compatible relational database built for the cloud, it gives services such as scale, fault tolerance and more. However, since creating the subscriber also results in a replication slot, I still had to do the following on my own:The following command solves both problems, run it in your favourite Postgres client:Yes, both RDS Postgres and RDS Aurora permit you to start using wal2json immediately.At this point I started the Go application, and data started to flow. In my previous tutorial Database Backup I have discussed Backup and Restore a PostgreSQL Database. AWS Aurora is a managed database service offering from amazon cloud. Note that in either case, you database will be unavailable for a few minutes as the upgrade completes and your database instances are rebooted. AWS SCT is a downloadable Java utility that runs locally on your computer. Amazon Aurora is a MySQL- and PostgreSQL-compatible relational database offered as a part of the Amazon Relational Database Service (RDS). Thus my research started with checking what other, including However, when dealing with AWS managed databases I dealt with gaps in the available materials, and I hope to bridge these gaps in this post.Let’s start with describing the planned solution: Use the pub-sub model, the Postgres would publish data changes to one or more subscribers.The instructions of starting to follow WAL are simple:Since I am writing a CDC in Go I wrote a WAL consumer similar to At this point I was pretty happy with myself, I was able to quickly create an application that listens to Postgres changes and I could now attend to the data at its destination.A CDC is written to transmit data changes from a source to a destination, so it is not developed in a vacuum, the source and destination systems have their own architecture that I had to adapt to.In some of the setups the source Postgres can be either:Reading many blog posts, discussions and guides I could understand that my code should not change, but I wasn’t quite sure how to make the RDS databases replicated data be available to the listener.While looking for materials about RDS Aurora Postgres and its logical replication I came up with few results, so I had to rely entirely on the following However, the next step was not clear.