Making Input/Output Completion Port API Available

The IOCP API allows SAP ASE to process multiple simultaneous asynchronous I/O operations in a scalable fashion. If you do not have IOCP version 6.1.5.0 or later configured on your system, SAP ASE does not start when you run dataserver, and you see an error message similar to:

% ./dataserver -v
exec(): 0509-036 Cannot load program dataserver because of the following errors:
        0509-130 Symbol   resolution failed for dataserver because:
        0509-136 Symbol   CreateIoCompletionPort (number 579) is not exported from dependent module /unix.
        0509-136 Symbol   GetMultipleCompletionStatus (number 580) is not exported from dependent module /unix.
        0509-136 Symbol   PostQueuedCompletionStatus (number 581) is not exported from dependent module /unix.
        0509-136 Symbol   ReadFile (number 582) is not exported from dependent module /unix.
        0509-136 Symbol   WriteFile (number 583) is not exported from dependent module /unix.
        0509-192 Examine .loader section symbols with the 'dump -Tv' command.

To check the status of IOCP on your machine, run this command at the UNIX prompt:

% lsdev -Cc iocp

If you installed IOCP and made it available, the system displays "Available" and provides additional information about the installation, such as:

% lsdev -Cc iocp
iocp0 Available  I/O Completion Ports
% lslpp -l bos.iocp.rte
Fileset                      	Level  State      		Description
Path: /usr/lib/objrepos
 	bos.iocp.rte         	6.1.5.0  COMMITTED  	I/O Completion Ports API
%

If IOCP is not available, running the lsdev command returns "0 Defined," such as:

% lsdev -Cc iocp
iocp0 Defined  I/O Completion Ports
%

To make IOCP available for SAP ASE: