Limit on Number of Google Spanner Read-Only Replicas
By : Juliano Sens
Date : October 01 2020, 12:00 AM
hop of those help? Cloud Spanner does not have a published limit on the number of read-only replicas (either per-region or within an instance configuration as a whole). However, note that when you create an instance, you select one of the existing instance configurations -- you can not define your own custom replication topology that pieces together different numbers of read-only replicas.
Does AWS RDS Multi AZ in conjuction with read replicas have less replication lag than just read replicas?
By : Special Branch
Date : March 29 2020, 07:55 AM
it should still fix some issue Multi-AZ RDS establishes a Secondary replica of the DB in a different AZ and is replicated synchronously. It can only be accessed when promoted to being the Master DB instance and is used exclusively for disaster recovery. Read Replicas are an asynchronous replication of the Master DB instance and can be created in one or more AZs/Regions.