distributed

Performans, Yük ve Stres Testleri (performance, load and stress testing)

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Performans Testi: Performans testleri bir uygulamanın cevap süresini (response time) farklı veri boyutlarında ve farklı kullanıcı sayılarında ölçmeyi hedefler. Cevap süresinde beklenen gereklilikleri sistemin cevaplayıp cevaplayamadığı belirlenmeye çalışılır. Burada sistem kelimesinin altını çizmek istiyorum. Performans testleri uygulama seviyesinde olabileceği gibi, veritabanı, network ya da işletim sistemi gibi önemli ortamlarda da gerçekleşebilir. Performans testlerinde amaç sistemin … Read more

Information Services for Grid/Web Service Oriented Architecture (SOA) Based Geospatial Applications

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Geographical Information Systems (GIS) presents data-intensive environment for acquiring, processing and sharing geo-data among interested parties. In order to serve geographical information to users in such environment, Service Oriented Architecture (SOA) principles have gained great importance. In SOA-based systems, Information Services support the discovery and handling of these geospatial services. Some options for Information Services … Read more

OGC Compatible Geographical Information Systems Web Services

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The Open Geospatial Consortium (OGC) defines a number of standards, both for data models and for online services, that has been widely adopted in the Geographical Information System (GIS) community. This has lead to a number of software development efforts, online data archives, and application communities. We survey these in the first part of this … Read more

Implementing Geographical Information System Grid Services to Support Computational Geophysics in a Service-Oriented Environment

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We describe the architecture and implementation of the Solid Earth Research Virtual Observatory (SERVO)’s Complexity Computational Environment. We base our design on a globally scalable distributed “cyber-infrastructure,” or Grid, built around a Web Services-based approach consistent with the extended Web Service Interoperability (WS-I+) model. In order to investigate problems in earthquake modeling and forecasting, we … Read more

Message Exchange For Web Services-Based Mapping Services

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The Open Geospatial Consortium (OGC) [1] defines a number of standards, both for data models and for online services, that has been widely adopted in the Geographical Information System (GIS) community. This has lead to a number of software development efforts, online data archives, and application communities. The emergence of Web Service technique overcomes the … Read more

Developing GIS Visualization Web Services For Geophysical Applications

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The Open Geospatial Consortium (OGC) defines a number of standards (both for data models and for online services) that have been widely adopted in the Geographical Information System (GIS) community. In this paper we will describe our group’s efforts to implement GIS services according to OGC standard specifications in accordance with the Web Services approach. … Read more