EclipseLink/Examples/JPA/Simulation

Simulation JPA Application Example

Purpose

• This sumulation will serve as a near real world enterprise application that showcases utilizing JPA as the persistence or integration layer - specifically using EclipseLink JPA as the provider.
• This enterprise application will offer the services of a simulated connection machine (Ref: Thinking Machines CM-2) symbolic vector processor.
  • Why are we choosing an older architecture to simulate?
    • a) The architecture is very clean and even though it is very large - is simple enough to implement.
    • b) The design is proven and static - as it has been superceeded by more powerfull designs).
    • c) The massively parallel processing design of the CM-2 matches our goal of utilizing parallelism at both the thread and multi-core processor level on our host machine.

Goals

• We would like to explore the following limits of the JPA provider and hosting application server.
  • Performance and Volumetrics: We require 65536 processor objects.

Infrastructure

• OS: Windows XP or Vista 32/64 bit
• Database: Oracle 11gR1
• JPA provider: EclipseLink 1.2
• JDK: Sun 1.6.0_14

Analysis

Data Model

Processor Architecture

• Each CM-2 processor is composed of up to 64k (65536) 1-bit processors arranged in a 12-dimensional hypercube.
  • There are 16 1-bit processors per chip along with 1 routing processor per chip.
    • There are 32 cpu chips and 32 ram chips per backplane board
      • There are 16 boards per quadrant
        • There are 8 quadrands to a CM-2
  • We therefore have (2^4=16) x (2^5=32) x (2^4=16) x (2^3=8) = 2^16 = 65536 possible processors in a fully configured system.

Hierarchy

• Hypercube (quadrants(1:M), input, output, program)
• Quadrant (boards(1:M), hypercube(1:1))
• Board (processorChips(1:M), ramChips(1:M))
• Chip(A)
  • ProcessorChip (processors (1:M), router (1:1))
  • MemoryChip
• Processor(A)
  • VectorProcessor(alu, stateMachine, uProgram)
  • RouterProcessor (routers(1:M))