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The biggest problem for me with GAE is cost. Currently I'm paying around $150 per week for around 50k daily active users (~6 million requests per day).

I'm almost sure, that i can run the same amount of traffic from $100/month dedicated server.

This is what I've never understood about GAE.

If you're small, GAE is free, but then, you could host anywhere for peanuts - just buy a linode or a small EC2 instance, it doesn't really matter.

Once your site becomes big, cost is going to matter and GAE is as expensive as anyone else, last time I looked, quite a bit more expensive.

So there is really not much advantage, it is only free when it doesn't matter, and when it does you're going to start looking for the exit pretty quickly, not just because of cost but because GAE imposes all kinds of limits which may make dealing with your problems much much harder.

I'm curious how the billing breaks down for your app. Is it mostly CPU quota? Or bandwidth? etc.

For me it's CPU and bandwidth (it's lots of real-time image transformations). So if you look at GAE it's just about the same as EC2 (0.10 / hr for CPU, 0.10/0.12 GB for data, 0.15/GB for storage), but there is no "reserved instances" discount which is really significant (unless I'm unaware of it). On balance it's comparable to EC2 but you have way less flexibility.

1) It's hard to move without rewriting the code. 2) It's hard to get a consistent data snapshot without taking your service off for several hours.

I'm paying a similar amount for similar traffic, and I do recall it was a bit cheaper when I had my own server. However I also recall wasting a looot of time configuring and maintaining that server. I'm willing to spend some to save time.

Can you share general numbers on this? I'm interested in which quotas you're spending money on the most.

This is for yesterday.

Resource Used Free Billable Charge

CPU Time: $0.10/CPU hour 46.03 6.50 39.53 $3.96

Bandwidth Out: $0.12/GByte 2.54 1.00 1.54 $0.19

Bandwidth In: $0.10/GByte 0.76 1.00 0.00 $0.00

Stored Data: $0.005/GByte-day 750.78 1.00 749.78 $3.75

Recipients Emailed: $0.0001/Email 0.00 2,000.00 0.00 $0.00

Total: $7.90

Thank you.

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