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.

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.

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.

Aws Documentdb Pricing Calculator !free! (Certified — TUTORIAL)

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. Use the "Detailed I/O mode