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pglogical Rediscovered: A Fresh Approach to Logical Replication for Ultra-high Availability

by Hari Kiran

August 22, 2023

Data replication is an essential aspect of modern database management systems, ensuring data availability, fault tolerance, and scalability. In the PostgreSQL world, a groundbreaking extension called Spock has emerged, transforming the way multi-active replication is handled. Spock, based on the pglogical logical replication tool, brings in a host of new features, including conflict resolution and avoidance, asynchronous replication, and more. In this blog post, …

What is PostgreSQL?

PostgreSQL is the only Open Source database in the world that focuses on correctness first and extends that correctness to features such as NoSQL (JSON), ASYNC/SYNC Binary and Logical Replication. PostgreSQL also has features such as Horizontal partitioning, Stored Procedures and abilities to use replication to other legacy database systems such as MSSQL and Oracle.

PostgreSQL EOL (Extended Support)

Command Prompt with an appropriate support contract will provide 24x7x365 support for EOL versions of PostgreSQL up to 8 years from the initial release date. This extends the support lifecycle of a PostgreSQL release by 3 years.

What is Postgres (summary)

PostgreSQL, often referred to simply as "Postgres," is a popular open-source relational database management system (RDBMS). It is known for its stability, robustness, and support for a wide range of advanced features, making it a popular choice for large-scale, high-performance applications.

PostgreSQL was first released in 1996 as an Open Source project by the PostgreSQL Global Development Group. It is a fork of work done on Ingres and later Postgres …

Postgres Conference, PostgresConf and PgConf

In the past Postgres Conference has gone by many names including, Postgres Conference, PostgresConf, PgConf.US and PgConf.Org. These are all the same organizations they all refer back to, e.g; Postgres Conference now.

PostgreSQL Indexes: B-Tree

In older versions of PostgreSQL, a B-tree index only contained pointers to the heap (table) of where a particular set of data could be accessed. This can cause performance issues because we first need to scan the index and then retrieve the data from the table. While Index scans are relatively cheap due to how they store data, table scans can be very expensive because the data can be at any place within the table. Though current enterprise methods of storage have alleviated much of this (SSD/NVME) performance impact, it still exists as we need to search for the data twice.

EnterpriseDB (EDB) vs PostgreSQL

Command Prompt understands that sometimes a closed source version of software provides better features than the Open Source counterparts. However, it is Command Prompt’s considerable experience over 25 years of providing expert PostgreSQL professional services and support that there are a minute number of closed source opportunities for PostgreSQL. The ecosystem and community is vibrant and continuing to solve the problems that enterprises face in a collaborative and Open Source way.