Perfect Passwords SELECTION, PROTECTION, AUTHENTICATION
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The Reliability Wall for Exascale Supercomputing Xuejun Yang, Member, IEEE, Zhiyuan Wang, Jingling Xue, Senior Member, IEEE, and Yun Zhou
. IEEE TRANSACTIONS ON COMPUTERS, VOL. *, NO. *, * * 1 The Reliability Wall for Exascale Supercomputing Xuejun Yang, Member, IEEE, Zhiyuan Wang, Jingling Xue, Senior Member, IEEE, and Yun Zhou Abstract—Reliability is a key challenge to be understood to turn the vision of exascale supercomputing into reality. Inevitably, large-scale supercomputing systems, especially those at the peta/exascale levels, must tolerate failures, by incorporating fault- tolerance mechanisms to improve their reliability and availability. As the benefits of fault-tolerance mechanisms rarely come without associated time and/or capital costs, reliability will limit the scalability of parallel applications. This paper introduces for the first time the concept of “Reliability Wall” to highlight the significance of achieving scalable performance in peta/exascale supercomputing with fault tolerance. We quantify the effects of reliability on scalability, by proposing a reliability speedup, defining quantitatively the reliability wall, giving an existence theorem for the reliability wall, and categorizing a given system according to the time overhead incurred by fault tolerance. We also generalize these results into a general reliability speedup/wall framework by considering not only speedup but also costup. We analyze and extrapolate the existence of the reliability wall using two representative supercomputers, Intrepid and ASCI White, both employing checkpointing for fault tolerance, and have also studied the general reliability wall using Intrepid. These case studies provide insights on how to mitigate reliability-wall effects in system design and through hardware/software optimizations in peta/exascale supercomputing. Index Terms—fault tolerance, exascale, performance metric, reliability speedup, reliability wall, checkpointing. ! 1INTRODUCTION a revolution in computing at a greatly accelerated pace [2]. -
Language in India
LANGUAGE IN INDIA Strength for Today and Bright Hope for Tomorrow Volume 16:11 November 2016 ISSN 1930-2940 Managing Editor: M. S. Thirumalai, Ph.D. Editors: B. Mallikarjun, Ph.D. Sam Mohanlal, Ph.D. B. A. Sharada, Ph.D. A. R. Fatihi, Ph.D. Lakhan Gusain, Ph.D. Jennifer Marie Bayer, Ph.D. S. M. Ravichandran, Ph.D. G. Baskaran, Ph.D. L. Ramamoorthy, Ph.D. C. Subburaman, Ph.D. (Economics) N. Nadaraja Pillai, Ph.D. Renuga Devi, Ph.D. Soibam Rebika Devi, M.Sc., Ph.D. Assistant Managing Editor: Swarna Thirumalai, M.A. Contents Materials published in Language in India www.languageinindia.com are indexed in EBSCOHost database, MLA International Bibliography and the Directory of Periodicals, ProQuest (Linguistics and Language Behavior Abstracts) and Gale Research. The journal is included in the Cabell’s Directory, a leading directory in the USA. Articles published in Language in India are peer-reviewed by one or more members of the Board of Editors or an outside scholar who is a specialist in the related field. Since the dissertations are already reviewed by the University-appointed examiners, dissertations accepted for publication in Language in India are not reviewed again. This is our 16th year of publication. All back issues of the journal are accessible through this link: http://languageinindia.com/backissues/2001.html Language in India www.languageinindia.com ISSN 1930-2940 16:11 November 2016 Contents i Jimmy Teo THE 7 PILLARS OF THE HEALTH & SANITY iv-v Adiba Murtaza, M.A. Students’ Perceptions of English Language Instruction (EMI) at a Private University in Bangladesh: A Survey 1-11 K. -
AXS TV Schedule for Mon. April 22, 2019 to Sun. April 28, 2019 Monday
AXS TV Schedule for Mon. April 22, 2019 to Sun. April 28, 2019 Monday April 22, 2019 4:00 PM ET / 1:00 PM PT 6:00 AM ET / 3:00 AM PT Rock Legends Smart Travels Europe Amy Winehouse - Despite living a tragically short life, Amy had a significant impact on the music Out of Rome - We leave the eternal city behind by way of the famous Apian Way to explore the industry and is a recognized name around the world. Her unique voice and fusion of styles left a environs of Rome. First it’s the majesty of Emperor Hadrian’s villa and lakes of the Alban Hills. musical legacy that will live long in the memory of everyone her music has touched. Next, it’s south to the ancient seaport of Ostia, Rome’s Pompeii. Along the way we sample olive oil, stop at the ancient’s favorite beach and visit a medieval hilltop town. Our own five star villa 4:30 PM ET / 1:30 PM PT is a retreat fit for an emperor. CMA Fest Thomas Rhett and Kelsea Ballerini host as more than 20 of your favorite artists perform their 6:30 AM ET / 3:30 AM PT newest hits, including Carrie Underwood, Blake Shelton, Keith Urban, Jason Aldean, Luke Bryan, Rock Legends Dierks Bentley, Thomas Rhett, Chris Stapleton, Kelsea Ballerini, Jake Owen, Darius Rucker, Broth- Pearl Jam - Rock Legends Pearl Jam tells the story of one of the world’s biggest bands, featuring ers Osborne, Lauren Alaina and more. insights from music critics and showcasing classic music videos. -
Paradise Lost , Book III, Line 18
_Paradise Lost_, book III, line 18 %%%%%%%%%%%%%%%%%%%%%%%% ++++++++++Hacker's Encyclopedia++++++++ ===========by Logik Bomb (FOA)======== <http://www.xmission.com/~ryder/hack.html> ---------------(1997- Revised Second Edition)-------- ##################V2.5################## %%%%%%%%%%%%%%%%%%%%%%%% "[W]atch where you go once you have entered here, and to whom you turn! Do not be misled by that wide and easy passage!" And my Guide [said] to him: "That is not your concern; it is his fate to enter every door. This has been willed where what is willed must be, and is not yours to question. Say no more." -Dante Alighieri _The Inferno_, 1321 Translated by John Ciardi Acknowledgments ---------------------------- Dedicated to all those who disseminate information, forbidden or otherwise. Also, I should note that a few of these entries are taken from "A Complete List of Hacker Slang and Other Things," Version 1C, by Casual, Bloodwing and Crusader; this doc started out as an unofficial update. However, I've updated, altered, expanded, re-written and otherwise torn apart the original document, so I'd be surprised if you could find any vestiges of the original file left. I think the list is very informative; it came out in 1990, though, which makes it somewhat outdated. I also got a lot of information from the works listed in my bibliography, (it's at the end, after all the quotes) as well as many miscellaneous back issues of such e-zines as _Cheap Truth _, _40Hex_, the _LOD/H Technical Journals_ and _Phrack Magazine_; and print magazines such as _Internet Underground_, _Macworld_, _Mondo 2000_, _Newsweek_, _2600: The Hacker Quarterly_, _U.S. News & World Report_, _Time_, and _Wired_; in addition to various people I've consulted. -
LLNL Computation Directorate Annual Report (2014)
PRODUCTION TEAM LLNL Associate Director for Computation Dona L. Crawford Deputy Associate Directors James Brase, Trish Damkroger, John Grosh, and Michel McCoy Scientific Editors John Westlund and Ming Jiang Art Director Amy Henke Production Editor Deanna Willis Writers Andrea Baron, Rose Hansen, Caryn Meissner, Linda Null, Michelle Rubin, and Deanna Willis Proofreader Rose Hansen Photographer Lee Baker LLNL-TR-668095 3D Designer Prepared by LLNL under Contract DE-AC52-07NA27344. Ryan Chen This document was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor Lawrence Livermore National Security, LLC, nor any of their employees makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, Print Production manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or Lawrence Livermore National Security, LLC. The views and opinions of authors expressed herein do not necessarily state or reflect those of the Charlie Arteago, Jr., and Monarch Print Copy and Design Solutions United States government or Lawrence Livermore National Security, LLC, and shall not be used for advertising or product endorsement purposes. CONTENTS Message from the Associate Director . 2 An Award-Winning Organization . 4 CORAL Contract Awarded and Nonrecurring Engineering Begins . 6 Preparing Codes for a Technology Transition . 8 Flux: A Framework for Resource Management . -
Biomolecular Simulation Data Management In
BIOMOLECULAR SIMULATION DATA MANAGEMENT IN HETEROGENEOUS ENVIRONMENTS Julien Charles Victor Thibault A dissertation submitted to the faculty of The University of Utah in partial fulfillment of the requirements for the degree of Doctor of Philosophy Department of Biomedical Informatics The University of Utah December 2014 Copyright © Julien Charles Victor Thibault 2014 All Rights Reserved The University of Utah Graduate School STATEMENT OF DISSERTATION APPROVAL The dissertation of Julien Charles Victor Thibault has been approved by the following supervisory committee members: Julio Cesar Facelli , Chair 4/2/2014___ Date Approved Thomas E. Cheatham , Member 3/31/2014___ Date Approved Karen Eilbeck , Member 4/3/2014___ Date Approved Lewis J. Frey _ , Member 4/2/2014___ Date Approved Scott P. Narus , Member 4/4/2014___ Date Approved And by Wendy W. Chapman , Chair of the Department of Biomedical Informatics and by David B. Kieda, Dean of The Graduate School. ABSTRACT Over 40 years ago, the first computer simulation of a protein was reported: the atomic motions of a 58 amino acid protein were simulated for few picoseconds. With today’s supercomputers, simulations of large biomolecular systems with hundreds of thousands of atoms can reach biologically significant timescales. Through dynamics information biomolecular simulations can provide new insights into molecular structure and function to support the development of new drugs or therapies. While the recent advances in high-performance computing hardware and computational methods have enabled scientists to run longer simulations, they also created new challenges for data management. Investigators need to use local and national resources to run these simulations and store their output, which can reach terabytes of data on disk. -
Measuring Power Consumption on IBM Blue Gene/P
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Springer - Publisher Connector Comput Sci Res Dev DOI 10.1007/s00450-011-0192-y SPECIAL ISSUE PAPER Measuring power consumption on IBM Blue Gene/P Michael Hennecke · Wolfgang Frings · Willi Homberg · Anke Zitz · Michael Knobloch · Hans Böttiger © The Author(s) 2011. This article is published with open access at Springerlink.com Abstract Energy efficiency is a key design principle of the Top10 supercomputers on the November 2010 Top500 list IBM Blue Gene series of supercomputers, and Blue Gene [1] alone (which coincidentally are also the 10 systems with systems have consistently gained top GFlops/Watt rankings an Rpeak of at least one PFlops) are consuming a total power on the Green500 list. The Blue Gene hardware and man- of 33.4 MW [2]. These levels of power consumption are al- agement software provide built-in features to monitor power ready a concern for today’s Petascale supercomputers (with consumption at all levels of the machine’s power distribu- operational expenses becoming comparable to the capital tion network. This paper presents the Blue Gene/P power expenses for procuring the machine), and addressing the measurement infrastructure and discusses the operational energy challenge clearly is one of the key issues when ap- aspects of using this infrastructure on Petascale machines. proaching Exascale. We also describe the integration of Blue Gene power moni- While the Flops/Watt metric is useful, its emphasis on toring capabilities into system-level tools like LLview, and LINPACK performance and thus computational load ne- highlight some results of analyzing the production workload glects the fact that the energy costs of memory references at Research Center Jülich (FZJ). -
Blue Gene®/Q Overview and Update
Blue Gene®/Q Overview and Update November 2011 Agenda Hardware Architecture George Chiu Packaging & Cooling Paul Coteus Software Architecture Robert Wisniewski Applications & Configurations Jim Sexton IBM System Technology Group Blue Gene/Q 32 Node Board Industrial Design BQC DD2.0 4-rack system 5D torus 3 © 2011 IBM Corporation IBM System Technology Group Top 10 reasons that you need Blue Gene/Q 1. Ultra-scalability for breakthrough science – System can scale to 256 racks and beyond (>262,144 nodes) – Cluster: typically a few racks (512-1024 nodes) or less. 2. Highest capability machine in the world (20-100PF+ peak) 3. Superior reliability: Run an application across the whole machine, low maintenance 4. Highest power efficiency, smallest footprint, lowest TCO (Total Cost of Ownership) 5. Low latency, high bandwidth inter-processor communication system 6. Low latency, high bandwidth memory system 7. Open source and standards-based programming environment – Red Hat Linux distribution on service, front end, and I/O nodes – Lightweight Compute Node Kernel (CNK) on compute nodes ensures scaling with no OS jitter, enables reproducible runtime results – Automatic SIMD (Single-Instruction Multiple-Data) FPU exploitation enabled by IBM XL (Fortran, C, C++) compilers – PAMI (Parallel Active Messaging Interface) runtime layer. Runs across IBM HPC platforms 8. Software architecture extends application reach – Generalized communication runtime layer allows flexibility of programming model – Familiar Linux execution environment with support for most -
TMA4280—Introduction to Supercomputing
Supercomputing TMA4280—Introduction to Supercomputing NTNU, IMF January 12. 2018 1 Outline Context: Challenges in Computational Science and Engineering Examples: Simulation of turbulent flows and other applications Goal and means: parallel performance improvement Overview of supercomputing systems Conclusion 2 Computational Science and Engineering (CSE) What is the motivation for Supercomputing? Solve complex problems fast and accurately: — efforts in modelling and simulation push sciences and engineering applications forward, — computational requirements drive the development of new hardware and software. 3 Computational Science and Engineering (CSE) Development of computational methods for scientific research and innovation in engineering and technology. Covers the entire spectrum of natural sciences, mathematics, informatics: — Scientific model (Physics, Biology, Medical, . ) — Mathematical model — Numerical model — Implementation — Visualization, Post-processing — Validation ! Feedback: virtuous circle Allows for larger and more realistic problems to be simulated, new theories to be experimented numerically. 4 Outcome in Industrial Applications Figure: 2004: “The Falcon 7X becomes the first aircraft in industry history to be entirely developed in a virtual environment, from design to manufacturing to maintenance.” Dassault Systèmes 5 Evolution of computational power Figure: Moore’s Law: exponential increase of number of transistors per chip, 1-year rate (1965), 2-year rate (1975). WikiMedia, CC-BY-SA-3.0 6 Evolution of computational power -
Introduction to the Practical Aspects of Programming for IBM Blue Gene/P
Introduction to the Practical Aspects of Programming for IBM Blue Gene/P Alexander Pozdneev Research Software Engineer, IBM June 22, 2015 — International Summer Supercomputing Academy IBM Science and Technology Center Established in 2006 • Research projects I HPC simulations I Security I Oil and gas applications • ESSL math library for IBM POWER • IBM z Systems mainframes I Firmware I Linux on z Systems I Software • IBM Rational software • Smarter Commerce for Retail • Smarter Cities 2 c 2015 IBM Corporation Outline 1 Blue Gene architecture in the HPC world 2 Blue Gene/P architecture 3 Conclusion 4 References 3 c 2015 IBM Corporation Outline 1 Blue Gene architecture in the HPC world Brief history of Blue Gene architecture Blue Gene in TOP500 Blue Gene in Graph500 Scientific applications Gordon Bell awards Blue Gene installation sites 2 Blue Gene/P architecture 3 Conclusion 4 References 4 c 2015 IBM Corporation Brief history of Blue Gene architecture • 1999 US$100M research initiative, novel massively parallel architecture, protein folding • 2003, Nov Blue Gene/L first prototype TOP500, #73 • 2004, Nov 16 Blue Gene/L racks at LLNL TOP500, #1 • 2007 Second generation Blue Gene/P • 2009 National Medal of Technology and Innovation • 2012 Third generation Blue Gene/Q • Features: I Low frequency, low power consumption I Fast interconnect balanced with CPU I Light-weight OS 5 c 2015 IBM Corporation Blue Gene in TOP500 Date # System Model Nodes Cores Jun’14 / Nov’14 3 Sequoia Q 96k 1.5M Jun’13 / Nov’13 3 Sequoia Q 96k 1.5M Nov’12 2 Sequoia -
Cubed Circle Newsletter 192 – Jay Lethal's Big Win, PWG from out of Nowhere & More!
Cubed Circle Newsletter 192 – Jay Lethal's Big Win, PWG From Out of Nowhere & More! In this week's newsletter we return to discuss not only this week's WWE television programming, RAW and NXT, but also a Ring of Honor pay-per-view from a few weeks ago, a PWG show from the beginning of the year, and Mid-South TV from 1981! – Ryan Clingman, Cubed Circle Newsletter Editor Playing Catch-up – Part I: PWG 'From Out of Nowhere' and ROH 'Best in the World' As some readers may know, the first semester holidays began but a couple of weeks ago, meaning that I have approximately two more weeks to catch up on all of the pro-wres I missed both before and during exams. What I hope to do over the following two weeks is publish opinions in each week's newsletter covering, briefly and in general, what I watched that week in terms of newer material. Originally, this was a project meant to get underway last week, but the Tsuruta/Misawa piece that I had a lot of fun writing got in the way of that. This week we will be taking a look at Ring of Honor's 'Best in the World' internet-pay-per-view, as well as PWG's 'From Out of Nowhere'. Ring of Honor: Best in the World June 19th 2015, Terminal 5, New York, New York Ryan Clingman Terms such as "biggest match in the history of [insert company name]" are popular on two platforms, the first being the forever-home of hyperbole, the internet and its forums, and the other WWE's television, which continuously pushes the latest forgettable match as supposedly the "biggest" or "most important" in company history. -
AXS TV Schedule for Mon. April 1, 2019 to Sun. April 7, 2019 Monday
AXS TV Schedule for Mon. April 1, 2019 to Sun. April 7, 2019 Monday April 1, 2019 4:30 PM ET / 1:30 PM PT 6:00 AM ET / 3:00 AM PT The Monkees - Live From The Bomb Factory Smart Travels Europe Since branching out from the network series in the 1960s, the band has sold more than 75 mil- Ireland’s West Coast - We’re blessed with a bit of Irish luck as we take on Ireland’s ruggedly lion records worldwide. Don’t miss this pop-rock sensation playing live from the Bomb Factory beautiful west coast. We start in Galway, shopping for Irish crystal and Celtic jewelry. Heading in Dallas as they continue their 50th anniversary tour. south, we pass through the eerie landscape of the Burren, sample the best of Irish folk music, and binge on a medieval banquet at Bunratty Castle. Then we end our tour on the stunning 5:00 PM ET / 2:00 PM PT Dingle Peninsula. Bruce Springsteen And The E Street Band: Live In Barcelona Recorded in 2002, touring behind the timeless album The Rising, Bruce Springsteen and the E 6:30 AM ET / 3:30 AM PT Street Band performed to a crowd best described as “deliriously insane,” capturing the E Street Rock Legends Band with Clarence Clemons and with the addition of Soozie Tyrell. Live in Barcelona marked The Doors - The Doors, one of the most influential and controversial rock bands of the 1960s, the first time that a complete Springsteen show was released on either audio or video, and this were formed in Los Angeles in 1965 by UCLA film students Ray Manzarek, keyboards, and Jim legendary concert has never been seen in its entirety on broadcast television.