xSDN - An Expressive Simulator for Dynamic Network Flows

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Presentation slides of the paper titled, "An Expressive Simulator for Dynamic Network Flows," which was presented at the 2nd IEEE International Workshop on Software Defined Systems (SDS -2015). http://kkpradeeban.blogspot.com/2015/03/sdsic2e-2015-expressive-simulator-for.html

Engineering

An Expressive Simulator for Dynamic Network Flows
Pradeeban Kathiravelu Luis Veiga
INESC-ID Lisboa
Instituto Superior T´ecnico, Universidade de Lisboa
Lisbon, Portugal
2nd IEEE International Workshop on Software Deﬁned Systems (SDS -2015).
March 09, 2015. Tempe, AZ, USA.
Pradeeban Kathiravelu (IST-ULisboa) xSDN 1 / 18

Overview
1 Introduction
2 Motivation
3 xSDN
4 Evaluation
5 Conclusion
Pradeeban Kathiravelu (IST-ULisboa) xSDN 2 / 18

Introduction
Introduction
Emulators and simulators drive the networking researches.
Networks are growing larger and larger with time.
More enterprise networks.
data center networks
content delivery networks
cloud networks
Pradeeban Kathiravelu (IST-ULisboa) xSDN 3 / 18

Motivation
Motivation
Dynamic network ﬂows with adaptive routing algorithms.
Multiple constraints to satisfy
Service level agreements (SLA).
System policies and user intents.
Pradeeban Kathiravelu (IST-ULisboa) xSDN 4 / 18

Motivation
Goals
An expressive simulator for dynamic network ﬂows
Leveraging Software-Deﬁned Networking (SDN) paradigm.
Easy to learn and conﬁgure.
Eﬀective to simulate complex and networks of million nodes
Expressing networks, ﬂows, and policies using XML conﬁgurations.
Pradeeban Kathiravelu (IST-ULisboa) xSDN 5 / 18

Motivation
Contributions
xSDN, a compact and generic network simulator.
A novel approach, representing an entire network by the nodes
themselves.
A simulation architecture compatible to emulators and SDN
controllers.
Extensible as a distributed simulator.
Pradeeban Kathiravelu (IST-ULisboa) xSDN 6 / 18

xSDN
xSDN Expressive Distributed Simulations
Pradeeban Kathiravelu (IST-ULisboa) xSDN 7 / 18

xSDN
Execution Flow
Pradeeban Kathiravelu (IST-ULisboa) xSDN 8 / 18

xSDN
Software Architecture
Pradeeban Kathiravelu (IST-ULisboa) xSDN 9 / 18

xSDN
Node Representation
Indexed data structures
Eﬀective Search.
Scalability - Distributed Execution.
Pradeeban Kathiravelu (IST-ULisboa) xSDN 10 / 18

xSDN
Network Flows Representation in xSDN
Flows as a collection of chunks
Diﬀerent Sizes
Intervals between chunks
Deﬁned as, C, where C ∈ {D,G}
Strict (Default. Represented by, G).
Relaxed (Represented by, D).
Pradeeban Kathiravelu (IST-ULisboa) xSDN 11 / 18

xSDN
Expressing Flows
[double] - Chunk with,
given size - R
random size - [double]R[double]
C - All chunks follow ordering of type C,
if this is the ﬁrst element in an array followed by numbers.
[double]C - Interval of type C, of a given time.
[double]*[int] - Chunks of given or random size, given number of
times.
[double]+[double]C*[int] - Chunks of given or random size followed
by an interval, given number of times.
[double]/[int]+[double]C - A given number uniformly randomly
broken into number of smaller chunks followed by an interval.
Pradeeban Kathiravelu (IST-ULisboa) xSDN 12 / 18

xSDN
Flow Representation
Pradeeban Kathiravelu (IST-ULisboa) xSDN 13 / 18

Evaluation
Evaluation
Intel R CoreTM i7-4700MQ
CPU @ 2.40GHz 8 processor.
8 GB memory.
Ubuntu 14.04 LTS 64 bit operating system.
Simulating multiple networks
With varying number of nodes, ﬂows, and policies
Each having degree up to 5.
Systems as large as 100,000 nodes with 100,000 ﬂows.
Pradeeban Kathiravelu (IST-ULisboa) xSDN 14 / 18

Evaluation
Network Building with 1000s of Nodes
Time Taken Memory Used of Maximum (%)
Pradeeban Kathiravelu (IST-ULisboa) xSDN 15 / 18

Evaluation
Time for routing with varying nodes and ﬂows
Pradeeban Kathiravelu (IST-ULisboa) xSDN 16 / 18

Conclusion
Conclusion
Conclusions
A compact simulator for dynamic network ﬂows.
Expressing complex networks and dynamic ﬂows in a custom XML
syntax
Simulate the network ﬂow algorithms with policies.
SDN-Compatible design.
Light-weight.
Easy to learn and conﬁgure.
Future Work
Extension and OpenDaylight integration for seamless deployments.
SDNSim, A complete general-purpose SDN simulator.
Pradeeban Kathiravelu (IST-ULisboa) xSDN 17 / 18

Conclusion
Conclusions
A compact simulator for dynamic network ﬂows.
Expressing complex networks and dynamic ﬂows in a custom XML
syntax
Simulate the network ﬂow algorithms with policies.
SDN-Compatible design.
Light-weight.
Easy to learn and conﬁgure.
Future Work
Extension and OpenDaylight integration for seamless deployments.
SDNSim, A complete general-purpose SDN simulator.
Thank you!
Questions?
Pradeeban Kathiravelu (IST-ULisboa) xSDN 18 / 18

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Q.1 A single plate clutch with both sides of the plate effective is required to transmit 25 kW at 1600 r.p.m. The outer diameter of the plate is limited to 300 mm and the intensity of pressure between the plates not to exceed 0.07N / m * m ^ 2 Assuming uniform wear and coefficient of friction 0.3, find the inner diameter of the plates and the axial force necessary to engage the clutch. Q.2 A multiple disc clutch has radial width of the friction material as 1/5th of the maximum radius. The coefficient of friction is 0.25. Find the total number of discs required to transmit 60 kW at 3000 r.p.m. The maximum diameter of the clutch is 250 mm and the axial force is limited to 600 N. Also find the mean unit pressure on each contact surface. Q.3 A cone clutch is to be designed to transmit 7.5 kW at 900 r.p.m. The cone has a face angle of 12°. The width of the face is half of the mean radius and the normal pressure between the contact faces is not to exceed 0.09 N/mm². Assuming uniform wear and the coefficient of friction between the contact faces as 0.2, find the main dimensions of the clutch and the axial force required to engage the clutch. Q.4 A cone clutch is mounted on a shaft which transmits power at 225 r.p.m. The small diameter of the cone is 230 mm, the cone face is 50 mm and the cone face makes an angle of 15 deg with the horizontal. Determine the axial force necessary to engage the clutch to transmit 4.5 kW if the coefficient of friction of the contact surfaces is 0.25. What is the maximum pressure on the contact surfaces assuming uniform wear? Q.5 A soft surface cone clutch transmits a torque of 200 N-m at 1250 r.p.m. The larger diameter of the clutch is 350 mm. The cone pitch angle is 7.5 deg and the face width is 65 mm. If the coefficient of friction is 0.2. find: 1. the axial force required to transmit the torque: 2. the axial force required to engage the clutch; 3. the average normal pressure on the contact surfaces when the maximum torque is being transmitted; and 4. the maximum normal pressure assuming uniform wear. Q.6 A single block brake, as shown in Fig. 1. has the drum diameter 250 mm. The angle of contact is 90° and the coefficient of friction between the drum and the lining is 0.35. If the torque transmitted by the brake is 70 N-m, find the force P required to operate the brake. Q.7 The layout and dimensions of a double shoe brake is shown in Fig. 2. The diameter of the brake drum is 300 mm and the contact angle for each shoe is 90°. If the coefficient of friction for the brake lining and the drum is 0.4, find the spring force necessary to transmit a torque of 30 N-m. Also determine the width of the brake shoes, if the bearing pressure on the lining material is not to exceed 0.28N / m * m ^ 2

RS Khurmi Machine Design Clutch and Brake Exercise Numerical Solutions

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It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.

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The export maintenance system is a fully featured application that can help we manage fruit delivery business and achieve more control and information at a very low cost of total ownership. A fruit export maintains automatically monitors purchase, sales, supplier information. The system includes receiving fruit from the different supplier. Customer order is placed in the system, based on the order fruit has been sales to the customer. The report contains the details about product, purchase, sales, stock, and invoice. The main objective of this project is to computerize the company activities and to provide details about the production process at the fruit export maintenance system. The demand of fresh fruit fruits and processed food items in international and domestic market has shown a decent increase. This estimation is creating a necessity for growing more and more fruit fruits to cater the growing demand of domestic & international market. The customers effectively and hence help for establishing good relation between customer and fruit shop organization. It contains various customized modules for effectively maintaining fruit and stock information accurately and safely. When the fruits are sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting fruits for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item. The proposed project is developed to manage the fruit shop in the fruits for shop. The first module is the login. The admin should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.

Fruit shop management system project report.pdf

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The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message. When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely. When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item. Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.

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xSDN - An Expressive Simulator for Dynamic Network Flows

1. An Expressive Simulator for Dynamic Network Flows Pradeeban Kathiravelu Luis Veiga INESC-ID Lisboa Instituto Superior T´ecnico, Universidade de Lisboa Lisbon, Portugal 2nd IEEE International Workshop on Software Deﬁned Systems (SDS -2015). March 09, 2015. Tempe, AZ, USA. Pradeeban Kathiravelu (IST-ULisboa) xSDN 1 / 18

2. Overview 1 Introduction 2 Motivation 3 xSDN 4 Evaluation 5 Conclusion Pradeeban Kathiravelu (IST-ULisboa) xSDN 2 / 18

3. Introduction Introduction Emulators and simulators drive the networking researches. Networks are growing larger and larger with time. More enterprise networks. data center networks content delivery networks cloud networks Pradeeban Kathiravelu (IST-ULisboa) xSDN 3 / 18

4. Motivation Motivation Dynamic network ﬂows with adaptive routing algorithms. Multiple constraints to satisfy Service level agreements (SLA). System policies and user intents. Pradeeban Kathiravelu (IST-ULisboa) xSDN 4 / 18

5. Motivation Goals An expressive simulator for dynamic network flows Leveraging Software-Defined Networking (SDN) paradigm. Easy to learn and configure. Effective to simulate complex and networks of million nodes Expressing networks, flows, and policies using XML configurations. Pradeeban Kathiravelu (IST-ULisboa) xSDN 5 / 18

6. Motivation Contributions xSDN, a compact and generic network simulator. A novel approach, representing an entire network by the nodes themselves. A simulation architecture compatible to emulators and SDN controllers. Extensible as a distributed simulator. Pradeeban Kathiravelu (IST-ULisboa) xSDN 6 / 18

7. xSDN xSDN Expressive Distributed Simulations Pradeeban Kathiravelu (IST-ULisboa) xSDN 7 / 18

8. xSDN Execution Flow Pradeeban Kathiravelu (IST-ULisboa) xSDN 8 / 18

9. xSDN Software Architecture Pradeeban Kathiravelu (IST-ULisboa) xSDN 9 / 18

10. xSDN Node Representation Indexed data structures Eﬀective Search. Scalability - Distributed Execution. Pradeeban Kathiravelu (IST-ULisboa) xSDN 10 / 18

11. xSDN Network Flows Representation in xSDN Flows as a collection of chunks Diﬀerent Sizes Intervals between chunks Deﬁned as, C, where C ∈ {D,G} Strict (Default. Represented by, G). Relaxed (Represented by, D). Pradeeban Kathiravelu (IST-ULisboa) xSDN 11 / 18

12. xSDN Expressing Flows [double] - Chunk with, given size - R random size - [double]R[double] C - All chunks follow ordering of type C, if this is the ﬁrst element in an array followed by numbers. [double]C - Interval of type C, of a given time. [double]*[int] - Chunks of given or random size, given number of times. [double]+[double]C*[int] - Chunks of given or random size followed by an interval, given number of times. [double]/[int]+[double]C - A given number uniformly randomly broken into number of smaller chunks followed by an interval. Pradeeban Kathiravelu (IST-ULisboa) xSDN 12 / 18

13. xSDN Flow Representation Pradeeban Kathiravelu (IST-ULisboa) xSDN 13 / 18

14. Evaluation Evaluation Intel R CoreTM i7-4700MQ CPU @ 2.40GHz 8 processor. 8 GB memory. Ubuntu 14.04 LTS 64 bit operating system. Simulating multiple networks With varying number of nodes, ﬂows, and policies Each having degree up to 5. Systems as large as 100,000 nodes with 100,000 ﬂows. Pradeeban Kathiravelu (IST-ULisboa) xSDN 14 / 18

15. Evaluation Network Building with 1000s of Nodes Time Taken Memory Used of Maximum (%) Pradeeban Kathiravelu (IST-ULisboa) xSDN 15 / 18

16. Evaluation Time for routing with varying nodes and ﬂows Pradeeban Kathiravelu (IST-ULisboa) xSDN 16 / 18

17. Conclusion Conclusion Conclusions A compact simulator for dynamic network flows. Expressing complex networks and dynamic flows in a custom XML syntax Simulate the network flow algorithms with policies. SDN-Compatible design. Light-weight. Easy to learn and configure. Future Work Extension and OpenDaylight integration for seamless deployments. SDNSim, A complete general-purpose SDN simulator. Pradeeban Kathiravelu (IST-ULisboa) xSDN 17 / 18

18. Conclusion Conclusions A compact simulator for dynamic network flows. Expressing complex networks and dynamic flows in a custom XML syntax Simulate the network flow algorithms with policies. SDN-Compatible design. Light-weight. Easy to learn and configure. Future Work Extension and OpenDaylight integration for seamless deployments. SDNSim, A complete general-purpose SDN simulator. Thank you! Questions? Pradeeban Kathiravelu (IST-ULisboa) xSDN 18 / 18

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