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---+!! CREAM Functional Description The CREAM (Computing Resource Execution And Management) Service is a simple, lightweight service that implements all the operations at the Computing Element (CE) level; its well-defined !WebService-based interface and its implementation as an extension of the Java-Axis servlet (running inside the Apache Tomcat container) provide interoperability with clients written in any programming language and running on any computer platform. The CREAM interface is well-defined using the Web Service Description Language (WSDL); anyone can generate his/her CREAM client by simply filling in the stub code generated by WSDL parser (gSOAP for C/C++, Axis for Java, Perl module for perl). CREAM functionality: * Job Submission * Possibility of direct staging of input sandbox files * gLite JDL compliance (with CREAM-specific extensions) * Support for batch and parallel jobs * Manual and automatic proxy delegation * Job Cancellation * Job Info with configurable level of verbosity and filtering based on submission time and/or job status * Job List * Job Suspension and Resume * Job output retrieval * Job Purge for terminated jobs * Possibility (for admin) to disable new submissions * Self limiting CREAM behavior * CREAM is able to protect itself if the load, memory usage, etc. is too high. This happens disabling new job submissions, while the other commands are still allowed * ARGUS or gJAF based authorization * Possibility to forward requirements to the batch system * Integration with APEL and DGAS accounting systems CREAM can be used * by the Workload Management System (WMS), via the ICE (Interface to CREAM Environment) service * by a generic client, e.g. an end-user willing to directly submit jobs to a CREAM CE. A C++ command line interface (CLI) is available -- Main.MassimoSgaravatto - 2011-04-18
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Topic revision: r2 - 2011-04-19
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MassimoSgaravatto
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