System Options under z/OS |
Controls how often the DIV data set pages are updated when a DIV
data set backs a hiperspace library.
Default: |
HSSAVE
|
Valid in: |
configuration file, SAS invocation, OPTIONS
statement, OPTIONS window
|
Category: |
File Control: SASFILES
|
PROC OPTIONS GROUP= |
SASFILES
|
z/OS specifics: |
all
|
-
HSSAVE
-
specifies that the DIV data set pages are
updated every time SAS writes to the hiperspace.
-
NOHSSAVE
-
specifies that the DIV data set pages are
updated only when the library is closed. A SAS library is closed when you
clear the library specification or when you end your SAS session.
Note: DIV data sets
are also referred to as VSAM linear data sets. ![[cautionend]](../../../../common/63294/HTML/default/images/cautend.gif)
The HSSAVE default provides the best protection from
data loss during programming. During execution of tested programs, you might
want to improve performance by specifying NOHSSAVE. The performance improvement
results from a decrease in the number of I/O operations to the DIV data set.
However, you should not specify NOHSSAVE unless you are willing to risk losing
changes. You might lose changes if the library is not closed before a job
terminates
abnormally.
Copyright © 2009 by SAS Institute Inc., Cary, NC, USA. All rights reserved.