DBA / Database

How to perform a major upgrade of PostgreSQL in a Patroni cluster?

What is quorum in Patroni and why is it needed?

If the Postgres master has fallen and Patroni has switched it to a replica, how does the SQL server that pulls data from Postgres find out about this?

How to monitor replica lag from the master through the dashboard?

Why is quorum needed in etcd for Patroni?

How to perform a minor update of PostgreSQL in a Patroni cluster?

How to configure master node selection in Patroni if one node is weaker and should not become primary?

What is LSN and how is it used to monitor replication lag?

What happens to a request during a leader restart in Patroni?

Can data be lost if the master crashes and WAL files haven't reached the replicas?

Реплики без короны — они в режиме read-only или нет?

Tell me about the architecture of Patroni PostgreSQL clusters

How to set up a floating IP through Patroni so that the client does not know which node it will connect to?

What happens to the cluster if quorum is not reached?.

Have you worked with Percona? Tell us about orchestration in Patroni.