DASH: A C++ PGAS Library for Distributed Data 
  Structures and Parallel Algorithms
  www.dash-project.org
  Karl Fürlinger
  Ludwig-Maximilians-Universität München
                          DASH -Overview
    DASH is a C++ template library that offers
            – Distributed data structures and parallel algorithms
            – A complete PGAS (part. global address space) programming 
                system without a custom (pre-)compiler 
    Terminology                                                                                           Shared data: 
                                                                                                           managed by DASH in a 
                                                                                                           virtual global address 
           Shared            0..9               10..19      dash::Array a(1000);             ..999         space
                                                            dash::Shareds;
           Private         int a;                                                           int b;
                                                                        …                   int c;
                                                                                                                 Private data: 
                          Unit 0              Unit 1                                      Unit N-1               managed by regular 
                                                                                                                 C/C++ mechanisms
          Unit: The individual participants in a DASH program, 
          usually full OS processes.
  Overview of DASH –SPPEXA Workshop Japan                                                                          Tokio, April 6, 2017 | 2
                      DASH Project Structure
                                                                               “HA”               “Smart-DASH”
          DASH Application                                              Phase I (2013-2015)     Phase II (2016-2018)
                                         Tool                          Project management,     Project management, 
    DASH  C++ Template Library           s a       LMU Munich          C++ template library    C++ tempalte library, 
                                         nd                                                       DASH data dock
               DART API                   Int                              Libraries and       Smart data structures, 
        DASH Runtime (DART)              erfaces   TU Dresden            interfaces, tools           resilience
                                                                             support
       One-sided Communication                     HLRS Stuttgart         DART runtime             DART runtime
                Substrate
     MPI GASnet ARMCI GASPI                        KIT Karlsruhe         Application case 
       Hardware: Network, Processor,                                          studies
               Memory, Storage                                                                  Smart deployment, 
                                                   IHR Stuttgart                                  Application case 
                                                                                                      studies
      www.dash-project.org                                                             DASH is one of 16 SPPEXA projects
  Overview of DASH –SPPEXA Workshop Japan                                                        Tokio, April 6, 2017 | 3
           DASH Geography
 Overview of DASH –SPPEXA Workshop Japan         Tokio, April 6, 2017 | 4