Sybase DC35823-01-1500-04 Enabling asynchronous disk I/O, This step is mandatory for HP users

Enabling asynchronous disk I/O

setuid(uid);

/* run the program indicated as arguments to this program */

execv(*++argv, argv);

}

For additional information on user connections, see the System Administration

Guide.

Enabling asynchronous disk I/O

For HP-UX	This step is mandatory for HP users.
	To improve I/O performance on character or raw and block devices, enable
	asynchronous I/O by installing the HP asynchronous I/O driver from SAM. For
	help with installing this driver, contact your operating system administrator or
	HP technical support.
	Note Before executing the following instructions, shut down Adaptive Server
	(or SQL Server).

To enable asynchronous I/O:

1From the SAM Kernel Configuration menu, choose Drivers and set the Pending State for asyncdisk to In by adding the driver.

An alternate step could be done by adding the asyncdsk subsystem keyword to /stand/system.

2Rebuild the kernel, and reboot the system.

3Execute the following commands using the userid root:

#/etc/mknod/dev/async c 101 4 #chmod 0660/dev/async #chown <uid> /dev/async #/etc/setprivgrp <ugrp> MLOCK

Where:

<uid> is the identification (user ID)used by the user that is booting Adaptive Server.

<ugrp> is the user group for the <uid> user ID.

38 Adaptive Server Enterprise