What are the different ways to set up a PG database cluster?

  1. Cluster based on replication: achieving high availability and load balancing by replicating data to multiple nodes. Common solutions include master-slave replication, master-master replication, and logical replication.
  2. Cluster based on sharding: Data is stored in shards across multiple nodes, with each node responsible for processing some of the data. Requests are routed to the correct node through a router to achieve load balancing and scalability.
  3. Agent-based clustering: Using proxy nodes to manage and coordinate multiple database nodes, achieving functions such as load balancing and failover. Common proxies include pgpool-II and pgbouncer.
  4. Container-based cluster: deploying and managing multiple database nodes using container technologies such as Docker and Kubernetes to achieve high availability and elastic scalability.
  5. Cloud-based cluster: Utilizing the database services provided by the cloud platform to build and manage a pg database cluster, simplifying deployment and maintenance tasks.
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