Estimating Amazon EBS/RDS I/O Requests
Unsure how many million I/O requests will Amazon charge you on EBS and RDS? Here's a simple way:
1. Run iostats (debian users should apt-get install sysstat first)
2. Summarize the tps out of all applicable drives
3. Multiply by 2.6352 (60 seconds * 60 minutes * 24 hours * 30.5 days / 1,000,000 requests)
4. Multiply by $0.1 (which is the current pricing for 1M I/O requests)
Here's a quick sample:
So 12.95 * 2.6352 * $0.1 =~ $3.41 monthly :-)
