BLKSIZE= System Option: z/OS

Specifies the default block size for SAS libraries.
Valid in: Configuration file, SAS invocation, OPTIONS statement, SAS System Options window
Category: File Control: SASFILES
PROC OPTIONS GROUP= SASFILES
Default: 0
z/OS specifics: All
Syntax
Details
See Also

Syntax

BLKSIZE=n | nK | hexX | MIN | MAX

Required Arguments

n | nK
specifies the block size in multiples of 1 (bytes) or 1,024 (kilobytes). You can specify decimal values for the number of kilobytes. For example, a value of 8 specifies a block size of 8 bytes, and a value of .782K specifies a block size of 801 bytes.
hexX
specifies the block size as a hexadecimal value. You must specify the value beginning with a number (0–9), followed by hexadecimal characters (0–9, A–F), and then followed by an X. For example, the value 2dx sets the block size to 45 bytes and a value of 0a0x sets the block size to 160 bytes.
MIN
sets the default block size to 0.
If BLKSIZE=0 is specified, SAS uses the value of the appropriate BLKSIZE(device) option. If a nonzero value is specified for BLKSIZE, then SAS uses the value specified for all device types.
MAX
sets the default block size to 32,760.

Details

The BLKSIZE= option sets the physical block size of the library when you create a SAS library. After the library is created, the block size is set.
The default value of zero indicates that SAS uses the value of the appropriate BLKSIZE(device-type)= option. When a nonzero value is specified for BLKSIZE=, this value takes precedence over any value specified with the BLKSIZE(device-type)= option.
Note: Because of the constraints on the block size for direct access bound libraries, SAS uses a lower value than the value that is specified in some situations for direct access bound libraries. For more information, see Controlling Library Block Size.

See Also

Direct Access Bound Libraries
Sequential Access Bound Libraries
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