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| Titel |
Implementation of probabilistic approach in solving inverse problems as a grid-backed web service. |
| VerfasserIn |
K. I. Kholodkov, I. M. Aleshin, V. N. Koryagin, A. N. Shogin, O. V. Sukhoroslov |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250062499
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| Zusammenfassung |
| In this work probabilistic approach to inverse problem was adopted. It leads to definition and
sampling of a posteriori probability density function (APDF), which combines a priori
system information with information, derived from observation data. Use of APDF implies
significant computational resourses consumption, even for moderate model parameter count.
However the computation of APDF value at different points is carried out completely
independently, therefore this problem is considered ideal for loosely coupled distributed
computing system.
Globus Toolkit middleware was used, including the GridFTP for data transfer and GRAM
for execution control, as well as TORQUE resource manager for each computing node. To
reduce the hardware cost all grid services, except for GridFTP, run as virtual guests on
execution nodes. Due to very insignificant resources utilization the guests make no footprint
on node’s computation power.
To hide complex middleware interface from scientific users, user friendly web interface
was created, which provides restricted but sufficient tool set. Determination of seismic
anisotropy by wave form inversion was implemented as model problem. The interface allows
user to edit model parameters, estimate execution time for specified parameter set, run
calculation and perform result visualization. Details of start-up, management and results
acquisition are hidden from user.
This work was supported by Russian Foundation of Basic Research, grants
10-07-00491-a, 11-05-00988-a and 11-07-12045-ofi-m-2011 |
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