![]() ![]() Bandwidth optimization since only row changes for committed transactions of data is sent to the replicas instead of the entire block of data.Most recommended for high availability clusters thanks to better performance and low data loss.It is Ideal for backing up incremental data.Granting access to replicated data to various groups of users.Sending incremental changes in a database to replicas as they happen in real-time.Replicating between PostgreSQL instances hosted on different platforms e.g from Linux to Windows.Replicating between different major versions of PostgreSQL.Typical use cases for logical replication include: Thus, logical replication offers fine-grained control over data replication as opposed to physical replication. In simpler terms, logical replication copies database objects in a row-based model as opposed to physical replication which sends everything to the replica nodes. ![]() It works by replicating data objects and their changes based on a unique identifier such as a primary key. Logical replication was first introduced in PostgreSQL 9.0. It does not offer multi-master database replication.It is bandwidth-intensive since the entire data is copied and not just small sections of the primary cluster.It’s very efficient since it does not require any special handling.It is Ideal for read-only operations on the replicas.It ensures data consistency and high availability at any point since all the replicas hold identical copies of data.It is easy to implement since all the database clusters are identical.Recommended when dealing with large volumes of data.It is mostly used for disaster recovery setups and backups since all replicas are identical.This replication requires all replicas to be identical. Instead, it works on a disk block level and mirrors all data to replica nodes including all the tables in each database. Physical replication does not replicate a specific object of the primary database cluster such as a single row of data in a table. In simpler terms, the entire set of data on the primary server is copied to the replica which acts as a standby node. It uses exact block addresses and employs byte-by-byte replication. Physical replication maintains a full copy of the entire data of a cluster. This is the most common type of replication in PostgreSQL. Let’s have a look at each of these replication methods. Both are ideal for different use cases, and a user may choose one over the other depending on the end goal. PostgreSQL offers two methods for replications: physical (i.e. The goal of database replication is to ensure redundancy, consistency, high availability, and accessibility of data, especially in high-traffic, mission-critical applications. The primary server and replicas collectively form a database cluster. The primary server accepts read and write operations whereas the replicas serve read-only transactions. Database replication is the process of copying data from a central or primary server to multiple servers known as replicas. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |