Shared Concepts and Topics

Running in Symmetric Mode

The following statements run the HPLOGISTIC procedure in symmetric mode on the data appliance:


proc hplogistic data=dataLib.simData;
   class a b c;
   model y = a b c x1 x2 x3;
   performance host       = "data_appliance.sas.com"
               nodes      = 10
               gridmode   = sym;
run;

Figure 3.8 shows the results of this analysis.

Figure 3.8: Alongside-the-Database Execution in Symmetric Mode on Teradata

The HPLOGISTIC Procedure

Performance Information
Host Node	data_appliance.sas.com
Execution Mode	Distributed
Number of Compute Nodes	24
Number of Threads per Node	24

Data Access Information
Data	Engine	Role	Path
DATALIB.simData	TERADATA	Input	Parallel, Symmetric

Model Information
Data Source	DATALIB.simData
Response Variable	y
Class Parameterization	GLM
Distribution	Binary
Link Function	Logit
Optimization Technique	Newton-Raphson with Ridging

Parameter Estimates
Parameter	Estimate	Standard Error	DF	t Value	Pr > \|t\|
Intercept	5.7011	0.2539	Infty	22.45	<.0001
a 0	-0.01020	0.06627	Infty	-0.15	0.8777
a 1	0	.	.	.	.
b 0	0.7124	0.06558	Infty	10.86	<.0001
b 1	0	.	.	.	.
c 0	0.8036	0.06456	Infty	12.45	<.0001
c 1	0	.	.	.	.
x1	0.01975	0.000614	Infty	32.15	<.0001
x2	-0.04728	0.003098	Infty	-15.26	<.0001
x3	-0.1017	0.009470	Infty	-10.74	<.0001

The "Performance Information" table shows that the execution occurs in symmetric mode on the 24 nodes of the data appliance. In this case, the NODES=10 option in the PERFORMANCE statement is ignored because the number of nodes that are used is determined by the number of nodes across which the data are distributed, as indicated in the following warning message in the SAS log:


 WARNING: The NODES=10 option in the PERFORMANCE statement is ignored because
          you are running alongside the distributed data source
          DATALIB.simData.DATA. The number of compute nodes is determined by the
          configuration of the distributed DBMS.