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.
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