System Options under z/OS

SYNCHIO System Option: z/OS

Specifies whether synchronous I/O is enabled.

Default:	NOSYNCHIO
Valid in:	configuration file, SAS invocation
Category:	SAS files
PROC OPTIONS GROUP=	SASFILES
z/OS specifics:	default value
See:	SAS Language Reference: Dictionary for information about ASYNCHIO.

Syntax
Details

Syntax

SYNCHIO | NOSYNCHIO

SYNCHIO: causes data set I/O to wait for completion.
NOSYNCHIO: allows other logical SAS tasks to execute (if any are ready) while the I/O is being done.

The SYNCHIO system option is a mirror alias of the system option NOASYNCHIO. NOSYNCHIO is equivalent to ASYNCHIO.