Cloud Computing costs for an AWS based backup service. These are 2008 costs, everything is cheaper now but the arguments remain the same.

1. The Costs of Cloud Computing
Joe Drumgoole
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2. Real World Example : PutPlace
• Launched in 2008
• Fully hosted in Amazon AWS
• Ported from Dedicated Hosting
• Full Break down of all Costs
• This is real data – Warts and All
• This is an IaaS Example
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3. Architecture
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4. Core Services
• S3 : Storage
– Blob Storage
– Read and write up to 5GB files
– Rest API/SOAP API
– POSIX semantics via EBS
• EC2 : Compute
– Virtual Instances
– Several Sizes
– Local storage is volatile
– Reserved Instances
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5. Core Costs
• Resources
– Running Compute instances
– Stored Data
• Bandwidth
– Data in and out of Amazon
– Data between different Amazon regions
• Transactions
– Reads and Writes to S3
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6. Compute Costs 2008 (USD)
Size Memory
(GB)
CPU Disk
(GB)
Per
Hour
Per
Month
(30)
Per Year
(365)
Small 1.72 1 160 0.085 61.20 744.60
Large 7.5 4 850 0.34 244.80 2978.40
xLarge 15 8 1690 0.68 489.60 5956.80
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7. Compute Costs 2010 (USD)
Size Memory
(GB)
CPU Disk
(GB)
Per
Hour
Per
Month
(30)
Per Year
(365)
Micro 0.6 1 160 0.02 14.40 172.80
Small 1.72 1 160 0.085 61.20 744.60
Large 7.5 4 850 0.34 244.80 2978.40
xLarge 15 8 1690 0.68 489.60 5956.80
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8. Storage Costs
$0.15 per GB Month in 2008
$0.14 per GB Month in 2010
$0.055 per GB for 5PB or more
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9. Bandwidth Costs 2008
Data In : $0.10 per GB
Data Out : $0.15 per GB
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10. Transactions 2008
Writes: $0.01 per 1000 requests
Reads : $0.01 per 10,000 requests
Note : Only to S3
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Jan-08 Feb-08 Mar-08 Apr-08 May-08 Jun-08 Jul-08 Aug-08 Sep-08 Oct-08 Nov-08 Dec-08
EC2 Total Costs : $13303
EC2 Small
EC2 xLarge
EC2 Large

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Jan-08 Feb-08 Mar-08 Apr-08 May-08 Jun-08 Jul-08 Aug-08 Sep-08 Oct-08 Nov-08 Dec-08
S3 Storage Total Costs: $2575
S3 Storage
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13. $0.00
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Jan-08 Feb-08 Mar-08 Apr-08 May-08 Jun-08 Jul-08 Aug-08 Sep-08 Oct-08 Nov-08 Dec-08
Dollars
Bandwidth Total Costs: $508.11
EC2 Data In
EC2 Data Out
Elastic IP xfer
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Jan-08 Feb-08 Mar-08 Apr-08 May-08 Jun-08 Jul-08 Aug-08 Sep-08 Oct-08 Nov-08 Dec-08
Puts/Lists Total Costs: $516.92
Puts/Lists
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15. Cost Break Down
Area Cost %
Compute 13303.60 78%
Storage 2575.00 15%
Bandwidth 508.11 2%
Transactions 516.90 3.39%
Elastic IPs 84.79 0.5%
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16. Dedicated Hosting Costs
• Co-Located Servers
– $16,000 (including local disk + B/W)
• But:
– Long lead times for additional servers
– 1 year leases
– No durable storage
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17. What would I do Today
• Same architecture
• Use a POSIX distributed file system on nodes
• Start will less redundancy
• Work will more smaller instances
• Look at Google App Engine for Web Pages/API
• Use MySQL rather than Postgres
• Worry less about scaling
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18. What you should learn
• The mantra
– Compute
– Storage
– Bandwidth
– Transactions
• Know your costs, check your bills
• Code errors will now cost real money
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19. Q&A
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