What are the different architectures for PostgreSQL high availability?
There are different ways to replicate data across multiple servers, and failover traffic when e.g. a primary server stops responding. There are several architectures for PostgreSQL high availability, but the basic ones would be master-slave and master-master architectures.
How to clustercontrol PostgreSQL for high availability?
ClusterControl PostgreSQL Keepalived For our HA environment, we need to select the load balancer servers and the virtual IP address. Keepalived uses a virtual IP and migrates it from one load balancer to another in case of failure, so our setup can continue to function normally.
How to deploy PostgreSQL in a ha environment?
To perform a keepalived deployment, select the cluster, go to “Manage” menu and “Load Balancer” section, and then select “Keepalived” option. For our HA environment, we need to select the load balancer servers and the virtual IP address.
Why is synchronization a problem in PostgreSQL?
This is because though read-only data needs to be placed on each server only once, a write to any server has to be propagated to all servers so that future read requests to those servers return consistent results. This synchronization problem is the fundamental difficulty for servers working together.
Why do we need high availability in databases?
Nowadays, high availability is a requirement for many systems, no matter what technology we use. This is especially important for databases, as they store data that applications rely upon. There are different ways to replicate data across multiple servers, and failover traffic when e.g. a primary server stops responding.
Which is the best Azure database for PostgreSQL?
The Azure Database for PostgreSQL – Single Server service provides a guaranteed high level of availability with the financially backed service level agreement (SLA) of 99.99% uptime.