| System Options under z/OS |
Specifies whether the host sort interface can modify data in
buffers.
| Default: |
SORTSHRB for all modes except batch; NOSORTSHRB
for batch mode
|
| Valid in: |
configuration file, SAS invocation, OPTIONS
statement, OPTIONS window
|
| Category: |
Sort: SORT
|
| PROC OPTIONS GROUP= |
SORT
|
| z/OS specifics: |
all
|
-
SORTSHRB
-
specifies that two or more tasks are likely
to be sharing the data in buffers. If SORTSHRB is in effect, the host sort
interface cannot modify data in buffers but must move the data first. Moving
the data before modifying it could have a severe performance impact, especially
for large sorts.
SORTSHRB is the default value for the windowing environment,
interactive line mode, and noninteractive mode, where it is quite likely that
multiple tasks will use the same data.
-
NOSORTSHRB
-
specifies that no tasks will share the data
in buffers. If NOSORTSHRB is in effect, the host sort interface can modify
data in buffers. NOSORTSHRB is the default value for batch mode because it
is unlikely that buffers are shared during batch jobs, where larger sorts
are usually run. If not sharing buffers between tasks is not suitable for
your batch environment, be sure to specify SORTSHRB.
SAS data sets can be opened for input
by more than one SAS task (or window). When this happens, the buffers into
which the data is read can be shared between the tasks. Because the host sort
interface needs to modify the data before passing it to the host sort utility,
and by default does this directly to the data in the buffers, data can be
corrupted if more than one task is using the data in the buffers.
Copyright © 2009 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
