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JEM, the BEE is a Java, cloud-aware application which implements a Batch Execution Environment, to help and manage the execution of jobs, described by a Job Control Language (JCL). JEM, the BEE performs the following functions: * manages different JCLs * provides an all necessary commands to control the job * provides a cross platform execution * provides a cross programming languages * provides an intelligent dispatching by affinities * provides a global resource system * provides GDG implementation * collects all output produced by job ==Functions== Core applications are usually performed through batch processing,〔IBM Corporation. (Mainframes working after hours: Batch processing ) Mainframe concepts. Retrieved March 26, 2014.〕 which involves executing one or more batch jobs in a sequential flow.〔(Effect of Job Size Characteristics on Job Scheduling Performance )〕 The Job Entry Manager (JEM) helps receive jobs, schedule them for processing, and determine how job output is processed (like IBM JES2). Many batch jobs are run in parallel and JCL is used to control the operation of each job. Correct use of JCL parameters allows parallel, asynchronous execution of jobs that may need access the same data sets. One goal of a JEM is to process work while making the best use of system resources. To achieve this goal, resource management is needed during key phases: * Before job processing: to reserve input and output resources for jobs. * During job processing: to control step execution and standardize output * After job processing: to free all resources used by the completed jobs, making the resources available to other jobs. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Jem The Bee」の詳細全文を読む スポンサード リンク
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