>>>> [EMAIL PROTECTED] 08/19 1:53 >>> >Thanks for all the great info. and suggestions. I have another question >regarding memory and vm. One of the sales reps was saying that memory >on the z/Series under z/vm had a 10 to 1 ratio over memory on intel, >meaning if we had a intel box using 10 gig of ram that we would only >require 1 gig of ram on z/VM. I know you can do some trickery under vm >but is 10 to 1 really feasible?
It all of course depends. Consolidating multiple Intel images on Linux for Zseries with zVM saves a lot of duplicated storage. For example we have just moved 5 Intel boxes with a total of 18G that were storage constrained to one Linux image with 4G Vsize and it has storage to spare for Linux caches etc. If you move one-on-one and really use Intel memory it is 1:1 and you wil save nothing. But most Intel machines tend not to use all real memory and thus have slack memory space. Consolidating to virtual machines on zVM you can cut down a lot on that slack space. Also the paging capacity of zVM is superior to Intel due to the available I/O bandwith and paging algorithms, so an acceptable paging rate on zVM may be intolerable on Intel with respect to performance. Best regards, Pieter Harder [EMAIL PROTECTED] tel +31-73-6837133 / +31-6-47272537 ---------------------------------------------------------------------- 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
