The pricing page seems off, $0.03 per GB-hour for the magnetic store, while the unreleased SSD store is $0.0004167 per GB-hour?
Comparing with S3 prices surely the magnetic store is closer to $0.03 per GB-month?
Comparing with S3 prices surely the magnetic store is closer to $0.03 per GB-month?
From the example: "Writes cost: $ 8.64 per month. This is computed as: ( 2 writes * 100 EC2 instances * 60 minutes * 24 hours * 30 days) * $0.50/ 1 MM writes" I get $4.32 from ((2 * 100 * 60 * 24 * 30) * 0.5) / 1M
From the example: "Memory store cost: $ 3.55 per month. This is computed as: ( 2 KB per minute per instance * 100 instances * 60 minutes * 6 hours * 30 days) * $0.036 / GB-hour."
For starters I think there needs to be another "* 24 hours" in there - the 6 hours is to account for the retention period, but they're storing that 24 hours a day...
But even with that I get $1.87 for the memory store from ((2 * 100 * 60 * 6 * 24 * 30) / 1000000) * 0.036 (the div by 1M is to convert KB to GB)
From the example: "Magnetic store cost: $ 5.93 per month. This is computed as: (2 KB per minute per instance * 100 instances * 60 minutes * 24 hours * 30 days * 12 months) * $0.03 /GB-month."
But I get $3.11: ((2 * 100 * 60 * 24 * 30 * 12) / 1000000) * 0.03
From the example: "Query cost (alerting queries): $ 7.03 per month. This is computed as (10 MB per alerting query * 100 queries per hour * 24 hours * 30 days * $0.01 / GB). Alerting queries process 5 minutes of data. 5 minutes of data is 1 MB (2 KB per minute per instance * 100 instances * 5), which gets rounded up to 10 MB minimum charge for queries."
But I get $7.20 from (10 * 100 * 24 * 30 * 0.01) / 1000 (MB -> GB)
It's only on the "Query cost (ad-hoc queries)" that I can make the answer agree.
(They have now updated the magnetic price, as noted by others)