SAS LASR Analytic Server Concepts

When a SAS LASR Analytic Server is started with the data preparation interface, the server is subject to a maximum run time that was set when the SAS software was installed on the machines in the cluster. A typical value is 7200 seconds (2 hours). The maximum run-time setting acts as an inactivity time out. Whenever a SAS client initiates an action with the server, the run time is reset.

When a server is started, a server description file is written to disk. The file describes the SAS LASR Analytic Server instance that was started. This file is not intended to be read by any application other than SAS clients. The SAS client applications read the file to determine how to connect to the server instance. These files are located in a specific directory so that the SAS clients can coordinate management of server instances being started and stopped.

When a server is stopped with the data preparation interface, the server description file is removed as the server instance is stopped. If a server instance stops because it reached its maximum run time, the server description file is not removed. When a server description file is not removed, it is identified on the In-Memory Data tab of the data preparation interface as an orphaned file. Manage these orphaned files by either deleting them from the In-Memory Data tab, or using them to restart server instances.