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The Costs of Cloud Computing

Joe Drumgoolehttp://twitter.com/jdrumgoole


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


Architecture


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


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


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


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


Storage Costs

$0.15 per GB Month in 2008$0.14 per GB Month in 2010

$0.055 per GB for 5PB or more


Bandwidth Costs 2008

Data In : $0.10 per GBData Out : $0.15 per GB


Transactions 2008

Writes : $0.01 per 1000 requestsReads : $0.01 per 10,000

requests

Note : Only to S3


Jan-08

Jan-08

Jan-08

Jan-08

Feb-08

Feb-08

Feb-08

Mar-08

Mar-08

Mar-08

Mar-08

Apr-08

Apr-08

Apr-08

May-08

May-08

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Jun-08

Jun-08

Jun-08

Jun-08Jul-0

8Jul-0

8Jul-0

8

Aug-08

Aug-08

Aug-08

Aug-08

Sep-08

Sep-08

Sep-08

Oct-08

Oct-08

Oct-08

Nov-08

Nov-08

Nov-08

Nov-08

$0.00

$100.00

$200.00

$300.00

$400.00

$500.00

$600.00

$700.00

$800.00

$900.00

$1,000.00

$1,100.00

$1,200.00

$1,300.00

$1,400.00

$1,500.00

$1,600.00

$1,700.00

$1,800.00

$1,900.00

$2,000.00

EC2 Total Costs : $13303

EC2 SmallEC2 xLargeEC2 Large


Jan-08

Jan-08

Jan-08

Jan-08

Feb-08

Feb-08

Mar-08

Mar-08

Mar-08

Mar-08

Apr-08

Apr-08

Apr-08

May-08

May-08

May-08

Jun-08

Jun-08

Jun-08Jul-0

8Jul-0

8Jul-0

8

Aug-08

Aug-08

Aug-08

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Sep-08

Sep-08

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Oct-08

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Nov-08

Nov-08

$0.00

$50.00

$100.00

$150.00

$200.00

$250.00

$300.00

$350.00

$400.00

$450.00

$500.00

S3 Storage Total Costs: $2575

S3 Storage


Jan-08

Jan-08

Jan-08

Feb-08

Feb-08

Feb-08

Mar-08

Mar-08

Mar-08

Apr-08

Apr-08

May-08

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Jun-08

Jun-08

Jun-08Jul-0

8Jul-0

8Jul-0

8

Aug-08

Aug-08

Aug-08

Sep-08

Sep-08

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Oct-08

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Nov-08

$0.00

$5.00

$10.00

$15.00

$20.00

$25.00

$30.00

$35.00

$40.00

$45.00

$50.00

Bandwidth Total Costs: $508.11

EC2 Data InEC2 Data OutElastic IP xfer

Dolla

rs


Jan-08

Jan-08

Jan-08

Jan-08

Feb-08

Feb-08

Mar-08

Mar-08

Mar-08

Mar-08

Apr-08

Apr-08

Apr-08

May-08

May-08

May-08

Jun-08

Jun-08

Jun-08Jul-0

8Jul-0

8Jul-0

8

Aug-08

Aug-08

Aug-08

Sep-08

Sep-08

Sep-08

Oct-08

Oct-08

Oct-08

Nov-08

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Nov-08

$0.00

$20.00

$40.00

$60.00

$80.00

$100.00

$120.00

$140.00

$160.00

$180.00

$200.00

Puts/Lists Total Costs: $516.92

Puts/Lists


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%


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


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


What you should learn

• The mantra– Compute– Storage– Bandwidth– Transactions

• Know your costs, check your bills• Code errors will now cost real money


Q&A