We have a couple of resources to help you dive under.
In June of 2010, Dell made the decision to migrate 1,700 systems from SUSE Linux to Oracle Linux, while leaving the hardware and application layers unchanged. Suzanne Zorn worked with Jon Senger and Aik Zu Shyong, from Dell, to understand exactly how Dell did it. In this article, they describe Dell's server environment, the migration process, and what they learned. The article covers:
- Preparation, including the use of a "scratch" area
- Archiving configuration files
- Conversion of MPIO to PowerPath with a custom script
- Re-imaging the new OS and installing with kickstart
- Restoring the configuration files
- Adjusting profiles
- Restarting database and applications, and verifying correct operation.
More about Oracle Linux here.
Waseem Daher uses the command line to demonstrate how you can use Ksplice to install kernel updates to Oracle Linux without rebooting, even while your applications are still running. He also shows you how to use the Uptrack utility in Ksplice to manage your Linux packages more easily. It's only 18 minutes long, and well worth your time.
Why big wave surfers do it.