SAS 9.1.3 Intelligence Platform: System Administration Guide

292 Glossary
SAS/SHARE server
the result of an execution of the SERVER procedure, which is part of SAS/SHARE
software. A server runs in a separate SAS session that services users’ SAS sessions
by controlling and executing input and output requests to one or more SAS data
libraries.
SASROOT
a term that represents the name of the directory or folder in which SAS is installed
at your site or on your computer.
server component
in SAS Management Console, a metadata object that specifies information about how
to connect to a particular kind of SAS server on a particular computer.
server tier
in a SAS business intelligence system, the tier in which the SAS servers execute.
Examples of such servers are the SAS Metadata Server, the SAS Workspace Server,
the SAS Stored Process Server, and the SAS OLAP Server. These servers are typically
accessed either by clients or by Web applications that are running in the middle tier.
servlet
a Java program that runs on a Web server. Servlets can be considered a
complementary technology to applets, which run in Web browsers. Unlike applet
code, servlet code does not have to be downloaded to a Web browser. Instead, servlets
send HTML or other appropriate content back to a browser or to another type of
Web-based client application.
servlet container
an execution environment for Java servlets that contains a Java Virtual Machine.
The servlet container also provides other services for servlets and for the Web
applications that those servlets are part of. For example, the servlet container
converts HTTP requests that are sent by clients to Java objects that servlets can
work with, and it converts the output of servlets to HTTP responses. An example of a
popular servlet container is the Apache Tomcat server.
source metadata server
the metadata server from which metadata is promoted or replicated. See also
metadata promotion, metadata replication, target metadata server.
spawner
See object spawner.
SPD Server
a SAS Scalable Performance Data Server. An SPD Server restructures data in order
to enable multiple threads, running in parallel, to read and write massive amounts of
data efficiently.
stored process
See SAS Stored Process.
target metadata server
the metadata server to which the metadata is promoted or replicated. See also
metadata promotion, metadata replication, source metadata server.
thread
a single path of execution of a process in a single CPU, or a basic unit of program
execution in a thread-enabled operating system. In an SMP environment, which uses
multiple CPUs, multiple threads can be spawned and processed simultaneously.
Regardless of whether there is one CPU or many, each thread is an independent flow
of control that is scheduled by the operating system. See also SMP (symmetric
multiprocessing), thread-enabled operating system, threading.