Akshaya Home Farms is a concept to grow vegetables on farms and supply directly to customers, eliminating middlemen. The company is owned by Suresh Iyer, who has experience in farming and business. The vision is to supply high quality farm fresh vegetables to homes with good customer service. The plan is to expand operations across several cities in India and grow to 15,000 customers within 18-24 months. Alliance partners can sign up to use the brand and software to operate similar businesses in their cities. Partners will receive support in areas like farming, packing, and delivery operations. With 1000 customers, estimated annual revenue is 1.68 crores with 30% gross and 15% net margins.
Criminals in the Cloud: Past, Present, and FutureJim Lippard
The document discusses the history and evolution of botnets from the early 1990s to present day. It describes how early IRC bots in the 1990s evolved into modern botnets that use techniques like peer-to-peer networking, encryption, and polymorphism. Major botnets are highlighted from the early 2000s like Sobig and Agobot through the late 2000s like Storm, Srizbi, and Cutwail. The document provides an overview of the convergence of technologies that led to modern botnets and their use for criminal purposes like fraud, identity theft, and spamming.
The document discusses aspects of autonomic computing applied to peer-to-peer (P2P) systems to manage quality of service. It describes using a monitoring mechanism called SkyEye.KOM to gather statistics on P2P systems in a scalable and self-organizing way. Based on the monitoring data, the system can analyze for deviations from preset quality levels, plan adaptations like changing routing table sizes, and execute adaptations to reach and maintain quality goals. Simulations showed the approach enables P2P systems to precisely reach and hold preset quality intervals through self-configuration.
The document contains 12 exercises related to peer-to-peer systems. The exercises cover topics like indexing in peer-to-peer applications, guarantees expected from conventional servers versus peer-to-peer systems, trust and availability in personal computers, using hashes to identify objects, anonymity in peer-to-peer networks, routing algorithms, performance of peer-to-peer protocols, and search strategies for unstructured peer-to-peer systems. The exercises refer to concepts explained in the textbook "Distributed Systems: Concepts and Design" and aim to test the reader's understanding of these concepts.
The document proposes a Dynamic Search Algorithm (DSA) that takes advantage of different search algorithms like flooding and random walk. DSA switches between these algorithms based on the context to provide efficient searching in unstructured peer-to-peer networks. It was designed to address the key challenge of efficient searching in such networks. The algorithm's operation involves initially sending query messages to neighbors like flooding, and then switching to random walk where each receiving node passes the query to one neighbor. Performance is evaluated based on metrics like success rate, search time, and efficiency.
This document discusses peer-to-peer (P2P) systems. It introduces the rationale for P2P, which is to leverage edge resources and scale without centralized servers. It describes three generations of P2P systems: centralized file sharing (Gen I), decentralized file sharing (Gen II), and P2P middleware (Gen III). It then discusses various P2P architectures like pure, hybrid, and mediated P2P. The rest of the document focuses on distributed hash tables (DHTs), covering concepts like GUID routing, content routing, bootstrapping, and specific DHT implementations like Pastry and Chord.
Akshaya Home Farms is a concept to grow vegetables on farms and supply directly to customers, eliminating middlemen. The company is owned by Suresh Iyer, who has experience in farming and business. The vision is to supply high quality farm fresh vegetables to homes with good customer service. The plan is to expand operations across several cities in India and grow to 15,000 customers within 18-24 months. Alliance partners can sign up to use the brand and software to operate similar businesses in their cities. Partners will receive support in areas like farming, packing, and delivery operations. With 1000 customers, estimated annual revenue is 1.68 crores with 30% gross and 15% net margins.
Criminals in the Cloud: Past, Present, and FutureJim Lippard
The document discusses the history and evolution of botnets from the early 1990s to present day. It describes how early IRC bots in the 1990s evolved into modern botnets that use techniques like peer-to-peer networking, encryption, and polymorphism. Major botnets are highlighted from the early 2000s like Sobig and Agobot through the late 2000s like Storm, Srizbi, and Cutwail. The document provides an overview of the convergence of technologies that led to modern botnets and their use for criminal purposes like fraud, identity theft, and spamming.
The document discusses aspects of autonomic computing applied to peer-to-peer (P2P) systems to manage quality of service. It describes using a monitoring mechanism called SkyEye.KOM to gather statistics on P2P systems in a scalable and self-organizing way. Based on the monitoring data, the system can analyze for deviations from preset quality levels, plan adaptations like changing routing table sizes, and execute adaptations to reach and maintain quality goals. Simulations showed the approach enables P2P systems to precisely reach and hold preset quality intervals through self-configuration.
The document contains 12 exercises related to peer-to-peer systems. The exercises cover topics like indexing in peer-to-peer applications, guarantees expected from conventional servers versus peer-to-peer systems, trust and availability in personal computers, using hashes to identify objects, anonymity in peer-to-peer networks, routing algorithms, performance of peer-to-peer protocols, and search strategies for unstructured peer-to-peer systems. The exercises refer to concepts explained in the textbook "Distributed Systems: Concepts and Design" and aim to test the reader's understanding of these concepts.
The document proposes a Dynamic Search Algorithm (DSA) that takes advantage of different search algorithms like flooding and random walk. DSA switches between these algorithms based on the context to provide efficient searching in unstructured peer-to-peer networks. It was designed to address the key challenge of efficient searching in such networks. The algorithm's operation involves initially sending query messages to neighbors like flooding, and then switching to random walk where each receiving node passes the query to one neighbor. Performance is evaluated based on metrics like success rate, search time, and efficiency.
This document discusses peer-to-peer (P2P) systems. It introduces the rationale for P2P, which is to leverage edge resources and scale without centralized servers. It describes three generations of P2P systems: centralized file sharing (Gen I), decentralized file sharing (Gen II), and P2P middleware (Gen III). It then discusses various P2P architectures like pure, hybrid, and mediated P2P. The rest of the document focuses on distributed hash tables (DHTs), covering concepts like GUID routing, content routing, bootstrapping, and specific DHT implementations like Pastry and Chord.
IEEE CCNC 2011: Kalman Graffi - LifeSocial.KOM: A Secure and P2P-based Soluti...Kalman Graffi
The phenomenon of online social networks reaches millions of users in the Internet nowadays. In these, users present themselves, their interests and their social links which they use to interact with other users. We present in this paper LifeSocial.KOM, a p2p-based platform for secure online social networks which provides the functionality of common online social networks in a totally distributed and secure manner. It is plugin-based, thus extendible in its functionality, providing secure communication and access-controlled storage as well as monitored quality of service, addressing the needs of both, users and system providers. The platform operates solely on the resources of the users, eliminating the concentration of crucial operational costs for one provider. In a testbed evaluation, we show the feasibility of the approach and point out the potential of the p2p paradigm in the field of online social networks.
Infinispan, a distributed in-memory key/value data grid and cacheSebastian Andrasoni
This document provides an introduction to distributed in-memory data grids and caches, including Infinispan. It discusses hash tables, distributed hash tables, consistent hashing, and the Chord lookup protocol. It then describes data grids and Infinispan's architecture, which uses consistent hashing to distribute data across clusters and allows for high availability even when nodes fail or partitions occur. The document also briefly discusses Infinispan's features like transactions, querying, map-reduce, and more.
This document provides an introduction to peer-to-peer (P2P) computer networks. It discusses how P2P networks rely on the computing power and bandwidth of participants rather than centralized servers. The document then covers several examples of P2P networks including Gnutella and Kademlia, and discusses techniques like distributed hash tables, queries, and node joining/leaving.
Performance evaluation methods for P2P overlaysKnut-Helge Vik
This document discusses methods for evaluating the performance of peer-to-peer (P2P) overlay networks. It begins with an introduction to P2P networks and overlays, distinguishing between unstructured and structured overlays. It then discusses performance evaluation approaches, including simulation models, analytical models, and measurement-based techniques. Simulation models can be event-driven, static/Monte Carlo, or trace-driven. Analytical models apply queuing theory and complexity analysis. Measurement involves either live traffic observation or controlled experimentation. The document argues that combining different evaluation methods provides more robust performance assessments of P2P overlays.
Managing warehouse operations. How to manage and run warehouse operations by ...Omar Youssef
The document provides information about warehouse operations and goals. It discusses maximizing the effective use of space, equipment, labor and information. It outlines warehouse functions like receiving, storing, order picking and shipping. It also describes operational processes, inventory terms and costs, and opportunities to improve warehouse distribution. Controls are discussed around safety, fire prevention, theft and storing hazardous materials. Equipment and tools are also mentioned.
IEEE CCNC 2011: Kalman Graffi - LifeSocial.KOM: A Secure and P2P-based Soluti...Kalman Graffi
The phenomenon of online social networks reaches millions of users in the Internet nowadays. In these, users present themselves, their interests and their social links which they use to interact with other users. We present in this paper LifeSocial.KOM, a p2p-based platform for secure online social networks which provides the functionality of common online social networks in a totally distributed and secure manner. It is plugin-based, thus extendible in its functionality, providing secure communication and access-controlled storage as well as monitored quality of service, addressing the needs of both, users and system providers. The platform operates solely on the resources of the users, eliminating the concentration of crucial operational costs for one provider. In a testbed evaluation, we show the feasibility of the approach and point out the potential of the p2p paradigm in the field of online social networks.
Infinispan, a distributed in-memory key/value data grid and cacheSebastian Andrasoni
This document provides an introduction to distributed in-memory data grids and caches, including Infinispan. It discusses hash tables, distributed hash tables, consistent hashing, and the Chord lookup protocol. It then describes data grids and Infinispan's architecture, which uses consistent hashing to distribute data across clusters and allows for high availability even when nodes fail or partitions occur. The document also briefly discusses Infinispan's features like transactions, querying, map-reduce, and more.
This document provides an introduction to peer-to-peer (P2P) computer networks. It discusses how P2P networks rely on the computing power and bandwidth of participants rather than centralized servers. The document then covers several examples of P2P networks including Gnutella and Kademlia, and discusses techniques like distributed hash tables, queries, and node joining/leaving.
Performance evaluation methods for P2P overlaysKnut-Helge Vik
This document discusses methods for evaluating the performance of peer-to-peer (P2P) overlay networks. It begins with an introduction to P2P networks and overlays, distinguishing between unstructured and structured overlays. It then discusses performance evaluation approaches, including simulation models, analytical models, and measurement-based techniques. Simulation models can be event-driven, static/Monte Carlo, or trace-driven. Analytical models apply queuing theory and complexity analysis. Measurement involves either live traffic observation or controlled experimentation. The document argues that combining different evaluation methods provides more robust performance assessments of P2P overlays.
Managing warehouse operations. How to manage and run warehouse operations by ...Omar Youssef
The document provides information about warehouse operations and goals. It discusses maximizing the effective use of space, equipment, labor and information. It outlines warehouse functions like receiving, storing, order picking and shipping. It also describes operational processes, inventory terms and costs, and opportunities to improve warehouse distribution. Controls are discussed around safety, fire prevention, theft and storing hazardous materials. Equipment and tools are also mentioned.
7. Bibliography
P. Maymounkov and D. Mazieres.
Kademlia: A peer-to-peer information
system based on the xor metric.
Peer-to-Peer Systems, pages 53‒65,
2002.