PPT-Consistency Models

Replication Benefits Replication enhances tolerance to failure Performance can be improved in different ways Placing replicas in the proximity of the process using them Replicating servers and subsequently dividing the work among them. Service Level Agreements . for Cloud Storage. Douglas B. Terry, Vijayan Prabhakaran, Ramakrishna Kotla, Mahesh Balakrishnan, Marcos K. Aguilera, Hussam Abu-Libdeh. Microsoft Research. “A foolish consistency is the hobgoblin of little minds”. Weak Consistency Models. Madan Musuvathi. Research in Software Engineering. Microsoft Research. Hard to program. Hard to test. Hard to debug. General consensus: trade consistency for . Availability. Performance. Sandeep. Hans. Agenda. Database Consistency Conditions. STM Consistency Conditions. A different perspective. Consistency with other STM properties.. Conclusion. Database Consistency Conditions. Recoverability. CS 15-440. Consistency and Replication – Part . II. Lecture 11, Oct . 2, 2013. Mohammad . Hammoud. Today…. Last . Session:. Synchronization: Mutual Exclusion and Election . Algorithms. Consistency and Replication: Introduction. Motivation and context- consider models in form of UML class diagrams and enriched by OCL invariants- support development of such models with the tool USE (Uml-based Specification Environment)- USE Chapter 7. Most of the lecture notes are based on slides by Prof. Jalal Y. Kawash at Univ. of Calgary. Some notes are based on slides by Prof. Kenneth Chiu at SUNY Binghamton. I have modified them and added new slides. Presenter:. Anup. . Niroula. Before going to LSCs. Requirement Capturing and Analysis. UML diagrams. - Specify scenario of the system behavior. -Interaction between the objects. Message Sequence Chart. COS 518: . Advanced Computer Systems. Lecture . 3. Michael Freedman. Let’s say A and B send an op. . All readers see A . →. B ?. All . readers see . B. . → A ? . Some see . A . → B . and others . Distributed Systems. Lecture 14. Michael Freedman. 2. Linearizability. Eventual. Consistency models. Sequential. Causal. Lamport. clocks: C(a) < C(z) Conclusion: . None. Vector clocks: V(a) < V(z) Conclusion: . Distributed Systems. Lecture . 16. Michael Freedman. 2. Linearizability. Eventual. Consistency models. Sequential. Causal. Lamport. clocks: C(a) < C(z) Conclusion: . None. Vector clocks: V(a) < V(z) Conclusion: . Gibco boxy bottle 2008150presentGibco One Shot 50 mL bottle2016150presentGibco sera151committed to quality and innovation since 1962Gibco square plastics 19871501996Gibco round plastics 19961502007Gib Topics: synchronization wrap-up, . need for sequential consistency, fences . 2. Load-Linked and Store Conditional. LL-SC is an implementation of atomic read-modify-write. with very high flexibility. COS 418: Distributed Systems. Lecture 12. Wyatt Lloyd. Outline. Network Partitions. Linearizability. CAP Theorem. Consistency Hierarchy. Network Partitions Divide Systems. Network Partitions Divide Systems. Measuring and Understanding Consistency at Facebook. Haonan Lu*. †. ,. . Kaushik. . Veeraraghavan. †. ,. . Philippe . Ajoux. †. , . Jim . Hunt. †. , . Yee . Jiun. Song. †. , Wendy . Tobagus.