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Chapter 2 HPSS Planning
HPSS Installation Guide September 2002 73
Release 4.5, Revision 2
2.6.10.1 Asynchronous I/O
Asynchronous I/O must be enabled manually on AIX and Linux platforms. There should be no
asynchronous I/O setup required for Solaris or IRIX platforms.
2.6.10.1.1 AIX
To enable asynchronous I/O on an AIX platform, use either the chdev command:
chdev -l aio0 -a autoconfig=available
or smitty:
smitty aio
<select “Change / Show Characteristics of Asynchronous I/O”>
<change “STATE to be configured at system restart” to “available”>
<enter>
Asynchronous I/O on AIX must be enabled on the nodes on which the Mover will be running.
2.6.10.1.2 Linux
For Linux platforms asynchronous I/O is enabled at the time the kernel is built. To enable
asynchronous I/O on the Mover machine, follow the steps below:
1. Update the kernel to level 2.4.18.
2. Download the HPSS kaio-2.4.18 patch from the HPSS support Web site..?????
Note: Before rebuilding your Linux kernel please read all of section 2.6.10. This might
prevent you from doing multiple builds.
This package contains a kernel source patch for a modified version of SGI's open source
implementation of the asynchronous I/O facility (defined by the POSIX standard).
3. Untar the contents of the package. For example:
% tar xvf kaio-2.4.18-1.tar
4. There should be a README file and the source patch. As root, copy the kaio-2.4.18-1 patch
file to the /usr/src directory, and change directory to the base of the Linux source tree. For
example:
% cp kaio-2.4.18-1 /usr/src
% cd /usr/src/linux-2.4.18
5. Apply the source patch using the Lunix "patch" utility. For example:
% patch -p1 < ../kaio-2.4.18-1