David Okaya USC, Joanna Muench IRIS,

1
SCEC Earthworks Science GatewayOn-Demand
Synthetic Wave PropagationUsing Workflow
Technologies
David Okaya (USC), Joanna Muench (IRIS), Hunter
Francoeur and Phil Maechling (SCEC), Yifeng Cui
(SDSC), and the Pathway 2 working group
SCEC, ISI, SDSU, SDSC, URS Corp, UCSD, CMU,
USC, IRIS and Harvard 18 Jul 2006
2
Ground Motion Simulation
A. Deterministic hazards analysis (CME
Cybershake). B. Large-scale simulation of San
Andreas rupture events (CME Terashake). C.
Improvements to site response models simulation
of scenario earthquakes.
D. Inversion for earth model, EQ source
focal/rupture parameters. E. On-demand ground
motion response (a CME goal). F. "Embeddable"
synthetic seismogram workflow tool. G.
Auto-triggering of ground motion calculations.
FSM Fault System Model RDM Rupture Dynamics
Model
AWP Anelastic Wave Propagation SRM Site
Response Model
3
Choice of AWM code and Velocity Mesh
Same velocity model (CVM3.0) three AWM codes
Same AWM code (Olsen) three velocity models
Hollywood EQ -118.398o, 34.053o 7.00 km depth Mw
4.23, strike165o dip60o, rake0o Region 24 x
24 x 12 km dx 150 m
4
(No Transcript)
5
Earthworks Workflow Technology
Workflow management
1
task j
n
Applications
Resource sharing
Hardware
Define simulation
transfer compute
archive
Set inputs
6
Pathway 2 Wave Propagation SimulationDesign
Criteria for SCEC Researchers

• On-demand but with choices (ties into SCEC
  community research)
• Simplistic (e.g., constant velocities) to
  Community Velocity Models.
• Wave propagation (AWM) codes.
• Source mechanisms and rupture histories,
  Community Fault Model geometries.
• Post-simulation visualization and analysis (e.g.,
  filtering, intensity measures).
• Invocation flexibility
• (a) Web-based GUI, (b) command-line initiation,
  (c) requested from within another application.
• Computational and cyberinfrastructural support
• Distributed computational facilities (resources,
  allocations, permissions).
• Workflow mechanisms able to handle options.
• Automated storage, registration, and easy
  retrieval.
• Searchable metadata and provenance information.
• Advanced visualization of large amounts of 3D and
  4D data (Gbytes to Tbytes).
• Eventually, an environment easy for SCEC
  scientists to contribute research codes and
  products.

7
Seismological Options
Velocity Model
AWM
Intensity measures (PGA-PGV
spectral accel.) wave processing (debias,
filter, vel2accel.). PEER deconvol. PG
map making. Viz SDSC Viz ISI
CVM 4.0 CVM 3.0 CVM 2.2 Harvard VM. 1D
Hadley- Kanamori. Constant
velocity Top layer halfspace.
Olsen FD _at_HPCC.usc Graves FD
_at_HPCC.usc CMU FE _at_SCEC.usc TeraShake2
_at_Teragrid.sdsc Graves FD _at_Teragrid.sdsc CMU
Hercules Caltech FE UCSB FD
Double-couple point EQ. PEER-
verification. various source-time functions.
kinematic fault rupture.
Southern California 32.5-35.5oN 115-120oW Geog
raphical Frame Local Frame (relative km)
Linux/Intel large number of translators and
utility applications media QC, data transposes
8
SCEC Earthworks Science Gateway Basic
Capabilities

• Configure earthquake wave propagation
  simulations.
• Submit simulation for execution as workflow.
• Workflow executes across distributed grid
  environment including
• SCEC, USC HPCC, and TeraGrid
• Monitoring of workflow status.
• Data products registered with metadata into
  digital library
• Data discovery tools using metadata searches
• Data Retrieval for data products of interest

9
SCEC Workflow System Software Stack
Pegasus Meta-scheduler Ability converting
abstract workflows to concrete workflows Automatic
expansion of workflows to stage and transfer
files. Virtual Data System (VDS) Includes Condor,
Globus Job scheduling including condor glide-in
provisioning for embarrisingly parallel execution
on cluster Metadata Catalog Service Metadata
archive and data discovery Replica Location
Service Mapping logical files to physical
files Globus GSI security supported at USC and
TeraGrid. GridFTP for data transfer. Support for
Condor job scheduling. Storage Resource Broker
Client (SRB Server at SDSC).
10
SCEC Earthworks Science Gateway
11
Simulation Configuration Interface
underlying XML-based description file - no web
page upkeep
http //scecdata.usc.edu8081/
gridsphere/gridsphere login research
(earthworks)
12
SCEC Earthworks Science Gateway
wave.usc.edu
ia64.sdsc.edu
scecdata.usc.edu
desktop
intensity.usc.edu
13
Example PEER UHS-1 Verification
Lifelines Program Task 1A01
Mxy
14
Earthworks Objectives - Year 5

• Overall goal is to provide true on-demand service
  to SCEC community.
• Needs to be robust, vetted. Issue of community
  TeraGrid allocations.
• Ease in simulation building, execution, data
  product retrieval.
• Choices in AWM, velocity models, fault
  descriptions.
• Community contribution of fault sources (e.g.,
  Northridge, Puente Hills, Landers).
• to be archived in online site preferably in SRF
  format.
• Community contribution of additional scientific
  applications.
• Research codes to form a "Component Library"
  (tool box).
• Workflow concepts for other platforms.
• Share experience and tools for Cybershake,
  Terashake, Broadband.

15
Benefits of Scientific Workflows

• Conducts a series of computational tasks.
• Resources distributed across Internet.
• Chaining (outputs become inputs) replaces manual
  hand-offs.
• Accelerated creation of products.
• Ease of use - gives non-developers access to
  sophisticated codes.
• Avoids need to download-install-learn how to use
  someone else's code.
• Provides framework to host or assemble community
  set of applications.
• Honors original codes. Allows for heterogeneous
  coding styles.
• Framework to define common formats or standards
  when useful.
• Promotes exchange of data, products, codes.
  Community metadata.
• Multi-disciplinary workflows can promote even
  broader collaborations.
• E.g., ground motions fed into simulation of
  building shaking.
• Certain rules or guidelines make it easier to add
  a code into a workflow.

16
Strategic Computational Science Integration
IRIS
CIG
FSM
RDM
AWM
SRM
GEON
USGS
Combined SCEC Earthscope Collaboratory
Publications, Presentations, Integrated Models
of Active Geological EnvironmentS
Data and Software management organizations
Data gathering systems Earthscope/ANSS/ NEES
PIs, Working Groups, Centers, etc.
17
(No Transcript)
18
Strategic Computational Science Integration
IRIS
CIG
FSM
RDM
AWM
SRM
GEON
USGS
Combined SCEC Earthscope Collaboratory
Publications, Presentations, Integrated Models
of Active Geological EnvironmentS
Data and Software management organizations
Data gathering systems Earthscope/ANSS/ NEES
PIs, Working Groups, Centers, etc.
19
Earthworks Workflow Technology
Pegasus, Chimera, CondorG
Workflow management
1
task j
n
Request mechanism
EQs, CVMs, AWM codes
Applications
Resource sharing
Globus toolkit
Hardware
SCEC testbed
storage, metadata
CAT knowledge base
SCEC DB
VDC
MCS
RLS
SRB
Define simulation
transfer compute
archive
Set inputs
20
(No Transcript)