Knowledge Base

Does the reference architecture support multiple DB instance "types" simultaneously? (In other words, could the "Private Data Subnet" contain redundant PostgresQL instances and, say, redundant MongoDB instances?)

View full discussion in GitHub

Answer

Does the reference architecture support multiple DB instance "types" simultaneously? (In other words, could the "Private Data Subnet" contain redundant PostgresQL instances and, say, redundant MongoDB instances?)

The Reference Architecture deploys an RDS cluster using our [rds service module](https://docs.gruntwork.io/reference/services/data-storage/amazon-rds). The RDS service module supports expanding the cluster with: - Multi-AZ capability (one or two AWS managed hot standbys in alternative Availability Zones) - Dedicated read replica instances, up to the RDS limits. The initial deployment will include a single RDS cluster, but you can add additional calls to the `rds` module to deploy separate clusters into your environments after handoff. We do not support deploying MongoDB in the initial deployment of the Reference Architecture, nor do we have a supported module for managing MongoDB (our existing module has been deprecated and unmaintained as of 2019).