1 step 1. identify data sources and sinks estimated that : –four client-server application a 、...
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Step 1.Identify Data Sources and Sinks
• Estimated that:– Four client-server application A、 D、 G、 F
• Support demand access to data sets• Expect the clients to pull data form the server
– One distributed database B– Application C、 E provide remote-control acc
ess. • No clear data sources or sinks
– Computing and Storage Clusters• Feeds all applications (expect C、 E).
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Data Sources/Sinks for Application A
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Data Sources/Sinks for Application D and G
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Data Sources/Sinks for Application F
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Data Sources/Sinks for Application B
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Data Sources/Sinks for Application C and E
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Data Sources/Sinks for Computing and Storage Clusters
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Step 2.Applying Flow Boundaries
• Flow label: Application Flow Label
A fa
B fb
C/E fc/e
D/G fd/g
F ff
Computing fcomp
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Step 2.Applying Flow Boundaries
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Step 3.Applying Flow Models
• Using the flow models and flow boundaries to estimate where the backbone and composite flows are.
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Step 3.Applying Flow Models
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Step 4.Estimating Flow Distributions
Flow Flow Model Flow Boundaries
Flow Distribution
fa Client-Server Oak, SF, SJ 20/80(local/remote)
fb Client-Server SF 50/50(local/remote)
fc/e Peer-Peer Oak, SF 20/80(local/remote)
fd/g Client-Server Oak, SF 20/80(local/remote)
ff Client-Server Oak, SJ 50/50(local/remote)
fcomp Client-Server Oak, SF, SJ 20/80(local/remote)
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Step 5.Developing the Flowspec
Individual Flows
Reliability Capacity Delay
fa 99.5% 2.7 Mb/s 100 ms
fb 99.5% 53 Mb/s 25 ms
fc/e 100% 1.69 Mb/s 40 ms
fd/g 99.5% 10 Mb/s 80 ms
ff 99.5% 400 Kb/s 100 ms
fcomp 99.5% 2.7 Mb/s 100 ms
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Step 5.CF1…CF6
• CF1=CF2=(2.7)+(53)+(1.69)+(10)=67.39 Mb/s• CF3=CF4=CF5=(2.7)+(1.69)+(10)=14.39 Mb/s• CF6=(2.7)+(0.4)+(2.7)=5.8 Mb/s
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Step 5.CF1…CF6
Composite Flows
Reliability Capacity Delay
CF1 100% 67 Mb/s 25 ms
CF2 100% 67 Mb/s 25 ms
CF3 100% 14 Mb/s 40 ms
CF4 100% 14 Mb/s 40 ms
CF5 100% 14 Mb/s 40 ms
CF6 99.5% 6 Mb/s 100 ms
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Step 5.BB1/BB2
• 2((2.7)+(10)+(1.69))+(2.7)=31.48 Mb/s• (31)+(6)=37 Mb/s
Backbone Flows
Reliability Capacity Delay
BB1 100% 31 Mb/s 40 ms
BB2 100% 37 Mb/s 40 ms
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