Don't ingnore the storage issues here. Going from a 2GB/s SAN to ESCON DASD at 20MB/s a huge hit if you have any kind of disk access in the mix, and since you are giving DB2 as an example, you probably do have disk access as a large component of your end user performance experience.
You might want to consider going FCP instead of DASD and plugging into the same SAN you are using today. If your current DB2 is using gigabytes of ram as cache, going to 1GB total is also going to be a new bottleneck. Processor speed may be the least of your worries. Scott Ledbetter StorageTek -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Doug Griswold Sent: Wednesday, August 18, 2004 7:58 AM To: [EMAIL PROTECTED] Subject: z800 performance What kind of performance can I expect out of a z800 with one engine dedicated to linux with 1 gig of ram? I am very familiar with linux on other architectures (mostly x86) and I know what x86, powerpc, and sparc architectures are capable of but I have been unable to guestimate what 1 engine is capable of with a gig of ram. I know this is an impossible question because there is too many variables. But lets say we have a db2 database that is using 60 percent of a dual p4 x86, 4 gig/ram on a high performance SAN and you move this to a z800 with 1 ifl engine and a gig of ram and escon attached starage, what can I expect inperformance increase/decrease. Thanks ---------------------------------------------------------------------- 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
