NetBatch Manual

Attributes
NetBatch Manual—522460-004
7-60
EXTSWAP Job Attribute
EXTSWAP Job Attribute
The EXTSWAP job attribute specifies the name of the swap file for the default
extended data segment of a job’s executor-program process. The file provides space
for memory swaps of the default extended data segment during process execution.
volume-name
is the name of the volume where the executor-program process is to create a
temporary swap file. When the process terminates, the operating system
automatically purges the file.
file-name
is the name of a swap file for the default extended data segment. The file must be
on the same node as the executor-program process and can only be used by one
process at a time. The file is not purged when the executor-program process
terminates.
BATCHCOM expands a partially qualified file name by using the defaults specified
in the last VOLUME command. If there was no such command, the defaults current
at the start of the session apply.
Considerations
•
A job submitted without the EXTSWAP attribute creates its extended swap
file on
the volume specified by the SWAP attribute of DEFINE =_DEFAULTS. If the
DEFINE does not have the SWAP attribute, the operating system selects a volume
for the file.
•
An executor-program process does not use the specified swap file unless
the process
lets the operating system allocate space for memory swaps of the
default extended data segment.
•
The scheduler places the value of the EXTSWAP attribute in the ext-
swap-file
parameter of the PROCESS_CREATE_ procedure. For more
information about the procedure, see the Guardian Procedure Calls Reference
Manual.
Example
This example shows the EXTSWAP attribute specifying the extended swap file for a
user-written program:
> BATCHCOM $ZBAT; SUBMIT JOB EXTSWAP-JOB, EXECUTOR-PROGRAM
$DATA7.OBJFILES.OBJECT, EXTSWAP $TRASH.ZBAT.EXTSWAP
Job EXTSWAP-JOB Jobnumber 5 submitted
> BATCHCOM $ZBAT; INFO JOB 5, EXTSWAP
JOB ATTRIBUTES for EXTSWAP-JOB
EXT[SWAP]BBC{( AALVS1($volume-name, file-name) )