Aws Documentdb Pricing Calculator ✭
If you are guessing your I/O rate ("Uh, maybe 500 IOPS?"), the calculator is worthless—garbage in, garbage out. However, if you export CloudWatch metrics from a staging environment (e.g., DatabaseCursors , ReadIOPS , WriteIOPS ), the calculator becomes a crystal ball.
"I need to retain 30 days of change logs." Enter 2,000GB. The calculator adds that cost. Most users forget this, then cry when the bill arrives. Common Pitfalls (And How the Calculator Saves You) | Pitfall | Calculator Fix | | :--- | :--- | | Forgetting Data Transfer | The calculator has a "Data Transfer" tab. If you query DocumentDB from EC2 in different AZs, you pay cross-AZ fees. Add those here. | | Assuming 100% Utilization | The calculator defaults to "Always On" (730 hours/month). For dev environments that shut down at night, use the "Partial month" toggle. | | Mixing Instance Families | Your primary can be r5.large but your read replica can be r5.xlarge . The calculator allows asymmetric clusters. Use it. | Final Verdict: Is the Calculator Good Enough? Yes, but only if you have metrics. aws documentdb pricing calculator
If you are migrating from open-source MongoDB to AWS DocumentDB (a purpose-built database for JSON data), you quickly realize one truth: Performance is elastic, but costs can be rigid. Unlike Amazon S3, where pricing is simple storage arithmetic, DocumentDB pricing is a multi-dimensional chess game involving instances, IOPS, storage, and backups. If you are guessing your I/O rate ("Uh, maybe 500 IOPS
Use the "Detailed I/O mode." It lets you separate storageReadIOs (query results) from storageWriteIOs (index updates and document mutations). 4. The Storage Gap DocumentDB storage auto-scales up to 64TB. You tell the calculator your average used storage (e.g., 500GB). But here is the nuance: You pay for the high-water mark, not the average. The calculator adds that cost
The "Export as CSV" button. Take the estimate to your finance team before you launch the cluster. A 10-minute conversation with the calculator saves a $2,000 surprise on your next AWS bill.
