Software Version Control

• SubVersion software version control system

• WebSVN graphical interfaceoView version history logsoBrowse directory structureoCompare versions

Build System

• GNU AutoMake and AutoConfo Tools for automatically configuring and building

software source code packages for many Unix-like systems

o Implemented for FMDBo Ongoing effort to migrate remaining tools

Compliance Testing

• NightlyBuild Systemo For each tool scripts download and build the

software, and execute tests.  o A mechanism monitors the execution of scripts and

refers project owner(s) via email to log files upon failure.

o Currently implemented for FMDB Projecto Ongoing effort to migrate other ITAPS tools

Flexible distributed Mesh DataBase

FMDB: Overview

• General topology-based mesh databaseo   topological mesh entitieso   geometric model classificationo   entity adjacencies

• Provide general mesh representation and operations o  mesh topology, geometry and adjacency querieso  distributed mesh data structure representation

• Performs both in serial and in parallel • A part of component tools of ITAPS

FMDB: Software Aspects

• Performing in parallel involves:o proper communication for part boundary entityo mesh migration with user datao mesh partition o support multiple parts per process o mesh migration with user datao ghosting layer construction

• Parallel support is provided through:o IPComMan o Zoltano iZoltan with iMeshP interface

FMDB: Software Aspects

• Open source software, downloaded by world-wide users o we do not track the users, but we have provided help to

users outside US   • Provide a complete set of APIs to applications

o mesh-level APIso entity-level APIso utility APIs 

• Compliance with iMesh/iMeshP/iGeom ITAPS interfaces o iMeshP compliance tests

• Migration and entity exchange• Partition and part tests and part boundary entity queries• Ghost entity functions

o iMesh compliance tests• Entity topology and adjacency query functions

FMDB: Software Aspects

• Used by mesh improvement tools o MeshAdapto Curved mesh toolso Mesquite  

• Used by finite element analysiso  PHASTA RPI groupo  AMSI RPI group

• Support meshes with periodic boundary conditions both in serial and in parallel

FMDB: Future Efforts

• Full compliance with iMesh/iMeshP/iGeom/iRel/iField ITAPS interfaces

• Interoperable with more mesh improvement tools and finite element analysis

• Improve parallel scalability and efficiency in runtime and memory

• Provide better memory control on memory in mesh data structure and parallel operations

SCORECModel

SCORECModel: Overview

• Support geometric model of problem domain• Support for ITAPS iGeom common interface• Geometric model based on boundary representation• Topological queries based on the primary topological

entities and their adjacencies• Pointwise interrogations support • Entity level tags for data association

SCORECModel: Software Aspects

• Provide geometric query information for mesh adaptation serviceo Topological queries

• Entity/Entity Set adjacency, iterator ….

o Pointwise geometric interrogation • Closest point, normal, curvature ….

• Support different CAD modelero Parasolid, AcisoMesh model

SCORECModel: Software Aspects

• Used by mesh modification tools o MeshAdapto Curved mesh tools

• Used by Mesh DataBaseo FMDB

• Used by finite element analysiso AMSI RPI groupo PHASTA RPI group

SCORECModel: Future Efforts

• Ongoing efforts towards full compliance with iGeom interface

• Construction of parallel geometry interfaces

MeshAdapt

MeshAdapt: Overview

• Provides adapted mesh • Input:o a mesho an anisotropic size field assigned to the mesh

• Output:o a mesh that satisfies the given size field

• An ITAPS Component Tool• Performs in serial and parallel• Interacts with different mesh database

MeshAdapt: Software Aspects

• Performing in parallel involves:o proper communication for each modification

procedureo mesh migrationo dynamic load balancing 

• Parallel support is provided through:o IPComMano Zoltano iZoltan with iMeshP interface

MeshAdapt: Software Aspects

• Used by:o SLACo PPPLo PHASTA RPI Groupo AMSI RPI Group

• Required by ITAPS in Solution Adaptive Loop Tool• Mesh topology, geometry and adjacency queries are done

through the interaction with mesh databaseo Serial

• iMesh (interface with FMDB)• FMDB• Simmetrix 

o Parallel • iMeshP (partial functionality, interface with FMDB)• FMDB

MeshAdapt: Future Efforts

• Build a complete interface through API’s for iMesh/iMeshP, and others meshes and geometry

• Provide serial and parallel interface for Solution Adaptive Loop Tool

• Improve parallel scalability and efficiency• Take full advantage of the neighborhood concepts• Provide better memory control on part and while

communicating with other parts

IPComMan: Overview

• General-purpose communication package built on top of MPI 

• Improves inter-processor communications for massively parallel computers

• Created for computations characterized by large numbers of messages of various sizes 

• Introduces a concept of neighborhood to take advantage of local communication

• Eliminates or reduces the number of needed collective calls• Designed specifically for dynamic and irregular computation • A Component Tool that can be made available for ITAPS

IPComMan: Software Aspects

• API is based on the functions at the MPI level with message support only

• Stand-alone software; API can be easily adapted to any code which needs message exchange

• Currently used by:o FMDBo MeshAdapt 

• Supports iMeshP interface

Curved Mesh Tool

Curved MeshTool: Overview

• Provides functional interfaces to work with high-order curved meshes

• Adapt linear meshes into high-order meshes with curved elements

• Identify and correct invalid elements in high-order meshes

• Improve the element shape quality through a series of mesh modification operations

• An ITAPS Component Tool• Interacts with different mesh database

Curved MeshTool: Software Aspects

• Dependency on:o FMDB o MeshAdapt

• Required by ITAPS:o MeshAdapto Mesh Improvement

• Used by ITAPS applications:o Provides SLAC with curved meshes to support the

high order electromagnetic simulations

Curved MeshTool: Future Efforts

• Construction of iMesh/iMeshP compatible interface• Parallel implementation• Integration into MeshAdapt