SYNCHIO

SYNCHIO

Specifies whether synchronous I/O is enabled

Valid in: configuration file, SAS invocation

Category: Files: External files

PROC OPTIONS GROUP= EXTFILES and SASFILES

Syntax
Syntax Description
Details
Comparisons
See Also

Syntax

SYNCHIO| NOSYNCHIO

Syntax Description

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

Details

If the SYNCHIO option is not specified on the SAS invocation line or in the configuration file, its default value depends on the runmode with which SAS was invoked.

If SAS is invoked in DMR mode, BATCH mode, or LINE mode, the value is NOSYNCHIO (ASYNCHIO).

If SAS is invoked in full screen mode or OBJECTSERVER mode, the value will be SYNCHIO (NOASYNCHIO).

Operating Environment Information: Most SAS system options are initialized with default settings when SAS is invoked. However, the default settings for some SAS system options may vary both by operating environment and by site. Option values may also vary both by operating environment and by site. For details, see the SAS documentation for your operating environment. [cautionend]

Comparisons

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

See Also

System Options:

ASYNCHIO

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Valid in:	configuration file, SAS invocation
Category:	Files: External files
PROC OPTIONS GROUP=	EXTFILES and SASFILES