9.3. Types of Queues

Engineering Knowledge Manager

Administration Guide | Chapter 9: Defining EKM Servers, Queues, and External Applications |

9.2.2. Editing an Existing EKM Cache Server |  | 9.4. Managing Queues
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## 9.3. Types of Queues

All queues are defined under the Master EKM Server, which is located at `/Administration/Servers/Master`.

Figure 9.1: Sample Queues on Master Server

There are three types of queues in EKM:

- Data Extraction Queue

  EKM installs with a Data Extraction Queue at `/Administration/Servers/Master/EKM Server`. There can only be one Data Extraction Queue defined. This queue specifies a set of applications that can be run directly on the EKM Server and are used for extracting metadata, images and reports from supported simulation files (see Predefined External Applications).

- Batch Job Submission Queues

  These queues are used to run batch jobs in EKM. In order to run batch jobs, there must be a Batch Job Submission Queue for every queue in RSM that you want to use. The name of the EKM queue should match the name of a queue defined in RSM. Batch jobs submitted to the EKM queue will be sent to the queue of the same name in RSM.

  To automate the process of creating batch job submission queues, EKM provides a Synchronize Queues action for the `Master` server. This action will automatically create queues in EKM’s `/Administration/Servers/Master` folder for all queues defined in RSM. See Synchronizing Job Submission Queues. You can also create batch job submission queues directly in EKM, which results in queues being created in RSM. See Creating a Batch Job Submission Queue in EKM.

- Interactive Job Submission Queues

  These queues are used to run interactive jobs in EKM. Interactive queues are defined in the ekm.xml file (see the `enginframe` setting in Specifying Remote Process Policies (<remoteProcess>)). Queues defined in this file will be automatically created in the /Administration/Servers/Master folder when the EKM server starts. If you accidentally delete an interactive queue, you can use the Synchronize Queues action to restore it.

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