Enabling Asynchronous Disk I/O

HP-UX users must enable asynchronous I/O. Enabling asynchronous I/O improves I/O performance on character or raw block devices.

Prerequisites

Shut down Replication Server.

Install HP asynchronous I/O driver from the system administration manager (SAM). For help with installing this driver, contact your operating system administrator or HP technical support.

Task

Launch the kernel configuration:
kcweb -F
Select Modules.
Select asyncdsk and change the Next Boot to static.
Rebuild the kernel and restart the system.
Using userid, root, execute:
```
#/etc/mknod/dev/async c 101 4
#chmod 0660/dev/async
#chown uid /dev/async
#/etc/setprivgrp ugrp MLOCK
```
where:
- uid is the user ID who is starting Adaptive Server.
- ugrp is the group to which the user ID belongs.