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The goal of ASKALON is to simplify the development and optimization of applications that can harness the power of Cloud computing. The ASKALON project crafts a novel environment based on new innovative tools, services, and methodologies to make scientific application development and optimization for real applications and execution on Cloud environments an everyday practice.

小马加速器2025-快连加速器app

ASKALON User Guide

小马加速器2025-快连加速器app

ASKALON GUI Webstart version (~ 55 MB, requires J2SE Runtime Environment 5.0+) using Java^TM Web Start (Last update: 2013-01-10) or request a copy using the form: ASKALON-LA.pdf

小马加速器2025-快连加速器app

Objectives

Invisible Cloud for the End User and Application Developer
Support for Workflow Applications and Parameter Studies
High Level Application Modelling instead of Programming
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Advanced Middleware Services based on Genetic Algorithms, Ontologies and Semantic Web Technologies
Automatic Prediction and Interpretation of Cloud behavior
Automatic Search for Performance Problems
Fault Detection and Management
Resource Accounting and Pricing
Experiment Management and Control

Features and Technology

Service Oriented Architecture
Single Access User Portal
UML Workflow Editor
XML workflow representation (AGWL)
X509 certificates support
GSI-based grid security enabled
customizable online visualization
Web Services and WSRF
Globus Middleware
Amazon EC2 API support
Commodity of the Grid (CoG)-based grid acccess

Askalon is designed as a distributed service-oriented architecture comprising the following set of services:

Resource broker service targets negotiation and reservation of resources required to execute a scientific application.
Resource monitoring supports the monitoring of Cloud resources by integrating and extending existing Grid resource monitoring tools and by developing new techniques for resource monitoring (e.g. rule-based monitoring).
Information service is a general purpose service for scalable discovery, organisation, and maintenance of resource and application-specific data (including online and post-mortem).
Workflow executor service targets dynamic deployment, coordinated activation, and fault tolerant completion of activities onto the remote Cloud sites.
(Meta)-scheduler performs appropriate mapping of single or multiple workflow applications onto resources from the Cloud or Grid. This work continues our initial scheduling efforts in the context of the ZENTURIO experiment management and optimization tool.
Performance prediction is a service through which we are currently investigating new techniques for accurate estimation of execution time of atomic activities and data transfers, as well as of Cloud (spot instances) and Grid resource availability.
Performance analysis is a service that unifies the performance monitoring, instrumentation and analysis for scientific applications and supports the performance bottleneck interpretation.
Askalon provides a rich set of visualization diagrams for post-mortem and online visualization.