System Options under z/OS

FILESYNC= System Option: z/OS

Specifies when operating system buffers that contain contents of permanent SAS files are written to disk.

Default:	SAS
Valid in:	configuration file, SAS invocation
Category:	Files: SAS Files
PROC OPTIONS GROUP=	SASFILES
z/OS Specifics:	all
See:	FILESYNC= System Option in SAS Language Reference: Dictionary

Syntax
Details
See Also

Syntax

FILESYNC= SAS | CLOSE | HOST

SAS: specifies that SAS requests the operating system to force buffered data to be written to disk when it is best for the integrity of the SAS file. SAS is the default value.
CLOSE: specifies that SAS requests the operating system to force buffered data to be written to disk when the SAS file is closed.
HOST: specifies that the operating system schedules when the buffered data for a SAS file is written to disk.

Details

By using the FILESYNC= system option, SAS can tell the operating system when to force data that is temporarily stored in operating system buffers to be written to disk. Only SAS files in a permanent SAS library are affected; files in any temporary library are not affected. The FILESYNC= system option affects only SAS files in UFS libraries.

For direct access bound libraries and sequential access bound libraries, updates to files are performed as if FILESYNC=SAS has been specified, regardless of the setting of the FILESYNC option.

The HSSAVE system option, not FILESYNC, controls the timing for file updates to be committed to disk for members of DIV libraries. When the HSSAVE option is in effect, processing is equivalent to FILESYNC=SAS being in effect. The FILESYNC option has no effect on processing for DIV libraries.