3 - Grid Introduction Flashcards
Three point check list
A grid is a system that:
- Coordinates resources that are not subject to centralized control
- … using standard, open, general-purpose protocols and interfaces
- … to deliver nontrivial qualities of service.
Grid Characteristics
- Large Scale
- Geographical distribution
- Heterogeneity
- Resource sharing
- Multiple administrations
- Resource coordination
- Transparent access
- Dependable access
- Consistent access
- Pervasive access
Grid Characteristics: Large Scale
deal with resources ranging from few to millions. Avoiding performance degradation as the grid size increases.
Grid Characteristics: Geographical distribution
grid resources may be located at distant places.
Grid Characteristics: Heterogeneity
software and hardware on grid nodes varies (data, files, software, sensors)
Grid Characteristics: Resource sharing
resources belong to many different organizations. Other organizations (users) are allowed to access them.
Grid Characteristics: Resource coordination
required to provide aggregated computing capabilities.
Grid Characteristics: Multiple administrations
each organization may provide different policies for access and use of their resources. Security became even more complex when dealing with different policies.
Grid Characteristics: Transparent access
a grid should be seen as a single virtual computer.
Grid Characteristics: Dependable access
(dependability) service must be delivered under ensured Quality of Service requirements. Dependable services are required, because users need assurances that they will receive predictable and sustained level of performance.
Grid Characteristics: Pervasive access
access to available resources is granted by adapting to a dynamic environment. The grid must tailor its behavior as to extract the maximum performance from the available resources.
Grid Characteristics: Consistent access
standard services, protocols, and interfaces are required. Hide heterogeneity and allow scalability.
Grid Classification (4 categories)
- Compute Grid
- Data Grids
- Resource Grid
- Service Grids
Grid and Science
Data-intensive Science Simulation-based Science Remote access to experimental apparatus Virtual Community Science Data-driven science
