Scyld ClusterWare HPC: Installation Guide
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Updating Red Hat or CentOs Installation

Update RHEL5 or CentOS 5 either using Yum, or using Red Hat or CentOS distribution media. Note that Penguin continually tests ClusterWare with new patches from Red Hat and CentOS. Visit Scyld MasterLink at http://www.penguincomputing.com/support/masterlink to see the most recent errata fix tested with ClusterWare, and see any cautions about updated packages which may cause problems with ClusterWare.

Updating Using Yum

Use the following command: 

[root@scyld ~]# yum update --disablerepo=cw*
(--disablerepo-cw* is used above in case the ClusterWare repo is already installed in /etc/yum.repos.d, you must exclude it during the yum update). You can also exclude other packages using the --exclude=$package parameter. See the yum man page for instructions on using yum. The CentOS web site also provides an online manual for yum at http://www.centos.org/docs/4/html/yum/.

Updating Using Media

If you update your system via distribution media, be sure to select an "upgrade install" rather than a "full install", then follow the instructions provided with the media.

Tip

The just-installed newest base distribution kernel becomes the default in /etc/grub.conf. However, the Scyld ClusterWare distribution includes a customized kernel that must be the kernel that is booted when running Scyld ClusterWare HPC.

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