Some answers to your questions are in a "Linux 2.4 to 2.6 Transition Guide" PDF mentioned in today's posting by Jim Sibley: " Linux on zSeries page http://www-1.ibm.com/servers/eserver/zseries/os/linux/index.html There are more and more links to whitepapers, tips and hints, redbooks (and of course, marketing stuff).
An interesting white paper is available there dated this month (March,2005): Linux 2.4 to 2.6 Transition Guide. Jim Sibley" -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Tom Duerbusch Sent: Tuesday, March 29, 2005 1:25 PM To: [email protected] Subject: zLinux 31 to 64 bit Soon, we will have a z/890 and I need to make, at least, some of my Linux images, 64 bit. At that point, we will be on z/VM 5.1. 1. At this point, I don't really have a problem with just reinstalling Sles9 in order to get 64 bit. However, is there a way to migrate or toggle 64 bit mode in a Sles9 image installed on a 31 bit system? 2. I have some Sles7 and Sles8 images that I was thinking of reinstalling as Sles9 images. They don't need 64 bit capabilities. Is there a reason to install Sles9 as 31 bit when you have a 64 bit environment? Is there a performance hit on 64 bit vs 31 bit? Can you install a 31 bit Suse9 when in a 64 bit environment? 3. Sles9 seems to take more resources with the default install then Sles8 and Sles7. A Sles9 31 bit image would use swap space when booting with 32MBs, vs Sles7 and Sles8 never used swap during boot even in a 24MB machine. Others have indicated that Sles9 seems to take more CPU when idling. It seems to me that there are more services running by default in Sles9 that need to be looked at and/or shutdown. Getting off of Sles7 is a given. Too old and I don't want to have the administraction overhead of supporting every Suse version<G>. But what are others feeling of having mixed release levels of Suse, given an environment where you don't have to. i.e. it is easy to migrate Sles8 to Sles9? 1. Why bother? 2. Yea, I'll get to it later? 3. Bite the bullet and stop supporting mixed environments? 4. Wish we could do it? 5. Don't, stop! The additional resources is a concern? 6. I don't like change? (hey, I still have my VM/ESA 370 mode packs spinning...don't ask) 7. We migrate when we need to. 8. The release dies when the application dies (or a new release needs to be installed). Any other migration issues sites on Sles9 have? Thanks Tom Duerbusch THD Consulting ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
