PPT-Distributed Hash Tables

Chord and Dynamo Costin Raiciu Advanced Topics in Distributed Systems 18122012 Motivation file sharing Many users want to share files online If a files location is known downloading is easy. 11. CS634. Lecture 6, Feb . 17 2016. Slides based on “Database Management Systems” 3. rd. . ed. , . Ramakrishnan. and . Gehrke. HW1 5 #10. 10. . For every supplier that only supplies green parts, print the . Message Authentication Codes. Sebastiaan. de Hoogh, . TU/e. Cryptography 1. September 12, 2013. Announcements. Until this morning 50 students handed in 43 pieces of . homeworks. . (only 7 pairs). BUT: . . Sections 5.3, 5.4, 5.5, 5.6. 2. Designing a Hash Table. Hash function: establishing a key with an indexed location in a hash table.. E.g. . Index = hash(key) % table_size;. Resolve conflicts: . Need to handle case where multiple keys mapped to the same index.. CIS 606. Spring 2010. Hash tables. Many applications require a dynamic set that supports only the . dictionary . operations . INSERT. , SEARCH, and DELETE. Example: a symbol table in a compiler.. A hash table is effective for implementing a dictionary.. 11/8/2017. Recap: Parallel Query Processing. Three main ways to parallelize. 1. Run multiple queries, each on a different thread. 2. Run operators in different threads (“pipeline”). 3. Partition data, process each partition in a different processor. We have:. Discussed techniques for hashing. Discussed mapping down to a given range . 0, ..., . M. – 1. Now we must deal with collisions. Numerous techniques exist. Containers in general. Specifically linked lists. . Outline. Discuss what a hash method does. translates a string key into an integer . Discuss a few strategies for implementing a hash table. linear probing. quadratic probing. separate chaining hashing. COS . 518. : . Advanced Computer Systems. Lecture . 15. Daniel Suo. [Credit: . All slides copied wholesale from Kyle Jamieson and . Mike Freedman.. Selected . content adapted from B. Karp, R. Morris]. Instructor: Lilian de Greef Quarter: Summer 2017 CSE 373: Data Structures and Algorithms Lecture 6: Finishing Amortized Analysis; Dictionaries ADT; Introduction to Hash Tables Today: Finish up Amortized Analysis CSE 373: Data Structures and Algorithms. Thanks to Kasey Champion, Ben Jones, Adam Blank, Michael Lee, Evan McCarty, Robbie Weber, Whitaker Brand, Zora Fung, Stuart . Reges. , Justin Hsia, Ruth Anderson, and many others for sample slides and materials .... COS 418: . Distributed Systems. Lecture 7. Kyle Jamieson. [Credit: Selected content adapted from B. Karp, R. Morris]. Peer-to-Peer Systems. Napster, Gnutella, BitTorrent, challenges. Distributed Hash Tables. Distributed Hash Tables. Chord, . Kelips. , Dynamo. Galen Marchetti, Cornell University. 1960s – 1999: Research Origins. ARPANET. every node requests and serves content. No self-organization. USENET. Dr. . Barsha. . Mitra. CSIS . Dept. , BITS Pilani, Hyderabad Campus. Introduction. Course ID: SS ZG526, Title: Distributed Computing. allows for flexibly sharing resources (e.g., files and multimedia documents) stored across network-wide computers. Colspan. , . Rowspan. Svetlin Nakov. Technical Trainer. www.nakov.com. Software University. http://softuni.bg. 2. HTML Tables. Simple Tables. Complete HTML Tables. Data, Header and Footer Cells. Nested Tables.