PPT-Lecture 11 DHTs and Amazon Dynamo

Scaling up Assumption so far All replicas have entire state Example Every replica has value for every key What we need instead Partition state Map partitions to servers 2 Partitioning state. DeCandia,Hastorun,Jampani. , . Kakulapati. , . Lakshman. , . Pilchin. , . Sivasubramanian. , . Vosshall. , . Vogels. : . Dynamo: Amazon's highly available key-value store. . SOSP 2007. UCSB CS271. 1. crowd workers. @. niloufar_s. niloufar@cs.stanford.edu. STANFORD HCI GROUP. Niloufar Salehi, Lilly . Irani. , . Michael . Bernstein, . Ali . Alkhatib. , Eva . Ogbe. , Kristy . Milland. , . Clickhappier. Core Evolution. ~ 700 . Myr. T(r,. t. ). C(. r,t. ). r. ICB. (t). 3D Model:. Numerical Dynamo. ~ 5 . Myr. intervals. T(. x. ,t. ). C(. x. ,t. ). B. (. x. ,t. ). Thermodynamic. Parameters. CMB Heat Flow Q(t). Bjerknes. Memorial Lecture, AGU, San Francisco, 4 December 2012. Robert Houze. University of Washington. A personal story of three great field campaigns and the evolution of meteorological satellites . Houze. , Jr.. University of Washington. 37. th. Conference on Radar Meteorology. Norman, OK. 15 September . 2015. Polarimetric radar observations of nonprecipitating echo during DYNAMO/AMIE. DYNAMO/. COSC7388 – Advanced Distributed Computing. Presented By:. Eshwar Rohit . 0902362. Outline. Introduction. Background. Architectural Design. Implementation. Experiences & Lessons learnt. Conclusions. Robert A. Houze, Jr.. With contributions from:. S. Powell, M. . Zuluaga. , H. Barnes, A. Rowe. AGU Annual Meeting, San Francisco, 11 December 2013. The MJO scale. ~30-60 days. TOGA. COARE. West Pacific. Observation and Simulation . Yongqiang Sun, Michael Ying, . Shuguang. Wang, . Fuqing. Zhang. Group meeting. 07-19-2013. Wheeler and . Kiladis. . 1999. . . Kiladis. . et al. 2009. 2-Day. Motivation: . Ken Birman. Spring, 2018. http://www.cs.cornell.edu/courses/cs5412/2018sp. 1. A 5-lecture Roadmap!. http://www.cs.cornell.edu/courses/cs5412/2018sp. 2. Lecture 1: Transactions. Lecture 2: DHTs. Lecture 3:. Steve Saar (. CfA. /SAO. ). Essential Observations for Stellar Dynamos. Observations of Stellar Magnetic Variability. So, typically use proxies for B….. Ideally would like . high res. vector B! . CYGNSS Satellite Mission Support. Xiaowen. . Li. 1,2. . Taka Iguchi. 3,2. Stephen Nicolls. 2. . 1. Morgan State University. . 2. NASA Goddard Space Flight Center. 3. University of Maryland, College Park. Beihang University, China. Key points. . The toroidal fields are produced in the bulk of the convection zone by the latitudinal shear. The tachocline is unimportant in our model. . Zebin Zhang & . Landi. , Peter Son, Evan Tony. How it Works. Utilizing magnetic fields to convert mechanical rotation . (via hand crank) into . a pulsating direct current. The motion causes the magnetic field to push on electrons . CS 240: Computing Systems and Concurrency. Lecture 8. Marco Canini. Web applications are expected to be “always on”. Down time .  pisses off customers, costs $. System design considerations relevant to availability.