Many organizations using on-premises MySQL or PostgreSQL databases migrate to AWS. Initially, AWS RDS for PostgreSQL or MySQL offers a cost-effective and manageable solution.
However, as your workload grows, scaling up RDS instances can become expensive.
This article explores how Aurora Serverless V2 solves this challenge.
Aurora Serverless is an on-demand, auto-scaling version of Amazon Aurora that automatically adjusts resources based on your application's needs. This translates to:
Cost Savings: You only pay for the resources you use, eliminating the need for expensive, over-provisioned RDS instances.
Seamless Scaling: Aurora Serverless automatically scales up or down to handle traffic spikes, ensuring optimal performance.
Simplified Management: Serverless removes the need for manual database provisioning and configuration.
Migrating from RDS to Aurora Serverless V2 (Minimal Downtime)
Here's a step-by-step guide to migrate your RDS database to Aurora Serverless with minimal downtime:
Create an Aurora Read Replica: Create a read replica of your existing RDS database. This replica will stay in sync with the original database.
Switch RDS to Read-Only Mode: Configure your RDS instance to read-only mode to prevent data inconsistencies during migration.
Verify Replication: Ensure data replication between RDS and Aurora is complete before proceeding.
Promote Read Replica to Standalone Cluster: Convert the read replica into a standalone Aurora cluster.
Create a Snapshot: Take a snapshot of the standalone cluster before converting to Serverless.
Restore Snapshot to Aurora Serverless: Restore the snapshot (or use your existing standalone cluster) to create a new Aurora Serverless database instance.
Update Application Connection (Optional): If not using RDS Proxy, update your application's connection string to point to the new Aurora Serverless endpoint.
Update RDS Proxy (Optional): If utilizing an RDS Proxy with your RDS instance, update the proxy target to point to the new Aurora Serverless database. This allows your applications to connect seamlessly without modifying connection strings.
Benefits of Using RDS Proxy:
Using RDS Proxy with Aurora Serverless offers additional advantages:
Centralized Connection Management: Manage all database connections through a single endpoint.
Improved Security: RDS Proxy acts as a security gateway between your applications and the database.
Connection Pooling: Optimizes database connections and reduces connection overhead.
Reference: https://aws.amazon.com/getting-started/hands-on/migrate-rdsmysql-to-auroramysql/
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