From Domino System Administration, by Rob Kirkland, CLP, CLI. New Riders.
While Domino and Notes version 5.0 have been available for a while, many sites still have not upgraded for one reason or another. The following tip lists some considerations forupgrade planning before the cutover to 5.0. As with any major upgrade, careful planning from the administrative side will reap benefits when the actual changeover happens.
By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
There are three aspects of the planning and preparation process that I want to emphasize: reviewing your hardware capacity to ensure that your hardware will be able to handle the heavier load you're likely to put on it under R5; the value of conducting a dry run before upgrading for real; and the value of education to yourself and to your users.
First, you need to understand that Domino and Notes R5 do more than they did in R4. So, it should be no surprise that they use more computer resources than R4. Most organizations seem to overspec their servers anyway, so this may not be an issue for you. But if under your current version of Domino, your server is minimally configured, you'll definitely want to compare its specs with the R5 hardware requirements.
Even if your current servers have multiple processors, hundreds of megabytes of RAM, and terabytes of disk capacity, you should review your server's disk configuration at this time. R5 has a new feature called transaction logging, which enhances the integrity of your data, the speed of disk I/O, and the efficiency of the backup process. It is an optional feature, but you should definitely learn more about it and consider implementing it. However, there's a very good chance you'll want to rearrange your files on the disk first, because you should locate the transaction logs on a physically different hard disk or disk array than the data files. If you have one hard drive (or array), you'll want to add another. If you have more than one, you my want to rearrange data files so as to free one up for the transaction logs.
For more information on Domino System Administration, go to http://www.newriders.com/books/title.cfm?id=47.