PPT-When Raft Meets SDN: How to Elect a Leader and Reach Consensus in an Unruly Network

When Raft Meets SDN How to Elect a Leader and Reach Consensus in an Unruly Network Yang Zhang Eman Ramadan Hesham Mekky Zhi Li Zhang University of Minnesota Introduction Consensus Algorithm. lastclcamacuk ABSTRACT The Paxos algorithm is famously dif64257cult to reason about and even more so to implement despite having been synonymous with dis tributed consensus for over a decade The recently proposed Raft protocol lays claim to being a n Jacob Beal. Social Concepts in Self-Adaptive and Self-Organising Systems. IEEE SASO. September, 2013. Asymmetry trades robustness for speed. Spanning Tree. Consensus. Laplacian. Consensus. O(diameter). Background. Presenter. Michael Forvass. © . echoes. aviation consulting ab 2013. Unruly passengers. Legal obligation for the operator. Operator responsibilities. EASA . OPS ORO.GEN.110 (. g. ). The operator shall ensure that all personnel are made aware that they shall comply with the laws, regulations and procedures of those States in which operations are conducted and that are pertinent to the performance of their duties. Ken Birman. Fall 2012. Consensus… a classic problem. Consensus abstraction underlies many distributed systems and protocols. N processes. They start execution with inputs.  {0,1}. Asynchronous, reliable network. When you can’t agree to disagree. Consensus. Why do applications need consensus?. What does it mean to have consensus?. Consensus = consistency. Assumptions. Processes can choose values. Run at arbitrary speeds. Hyperledger. Fabric. Making . Blockchain Real for Business. Linux Foundation’s . Hyperledger. Project. Open Ledger Project . announced December 17, 2015 with . 17 . founders, now . over . 80 . members. t behavior?. An unruly act breaks a law that only applies to children. An unruly act does not break any laws, but it is offensive. An unrul. y act creates a disturbance in a public area.. An unruly act causes other people to behave illegally. . Jacob Beal. Social Concepts in Self-Adaptive and Self-Organising Systems. IEEE SASO. September, 2013. Asymmetry trades robustness for speed. Spanning Tree. Consensus. Laplacian. Consensus. O(diameter). January 17, 2018. Agenda Item #1. Welcome by the Chairs. Suzanne . Rosenblith. Reginald Landeau, Jr.. Gladys Cruz. Introductions. Agenda Item #2. Getting Oriented to the project and the day’s work. Paxos Made Simple One-shot Paxos: solving consensus Multipaxos: Efficient state machine replication One-shot Paxos: solving consensus Multipaxos: Efficient state machine replication Consensus Get N nodes to agree on a value Lecture 4. Andrew Or, Michael Freedman. RAFT slides heavily based on those from Diego Ongaro and John Ousterhout. Provide behavior of a single copy of object:. Read should return the most recent write. Engineering ElementaryAmended Review Committee Recommendation DenyProposed School NameProposed School FocusProposed Region/LocationMemphis Academy of Science and Engineering ElementarySTEMDowntownScho for Replicated Logs. Diego Ongaro and John Ousterhout. Stanford University. Replicated log => . replicated state . machine. All servers execute same commands in same . order. Consensus module ensures proper log replication. Prof. Smruti R. Sarangi. Computer Science and Engineering. IIT Delhi. 1. (c) Smruti R. Sarangi, 2020. Motivation. Paxos is too . complex. Paxos is . optimized. for agreeing upon a single value. If we want to agree upon a list of values (in the same order) such as a .