SAS Cloud Analytic Services (CAS) is the analytic server and associated cloud services in SAS Viya. This section describes how to create a CAS session and set up a CAS engine libref that you can use to connect to the CAS session. It assumes that you have a CAS server already available; contact your system administrator if you need help starting and terminating a server. This CAS server is identified by specifying the host on which it runs and the port on which it listens for communications. To simplify your interactions with this CAS server, the host information and port information for the server are stored as SAS option values that are retrieved automatically whenever this CAS server needs to be accessed. You can examine the host and port values for the server at your site by using the following statements:
proc options option=(CASHOST CASPORT);
run;
In addition to starting a CAS server, your system administrator might also have created a CAS session and a CAS engine libref for your use. You can define your own sessions and CAS engine librefs that connect to the CAS server as shown in the following statements:
cas mysess;
libname mycas cas sessref=mysess;
The CAS statement creates the CAS session named mysess, and the LIBNAME statement creates the mycas CAS engine libref that you use to connect to this session. It is not necessary to explicitly name the CASHOST and CASPORT of the CAS server in the CAS statement, because these values are retrieved from the corresponding SAS option values.
If you have created the mysess session, you can terminate it by using the TERMINATE option in the CAS statement as follows:
cas mysess terminate;
For more information about the CAS statement and the LIBNAME statement, see SAS Cloud Analytic Services: User’s Guide. For general information about CAS and CAS sessions, see SAS Cloud Analytic Services: Fundamentals.