Ron wrote: >Have you found any improvement ticking the clock in LPAR, >and if there is a difference? Is that because of LPAR or >because of other things (e.g. number of virtual CPUs >or whatever)?
I have seen the improvement under VM with the clocking stopped. I don't anyone here who has looked at the LPAR case with the clocking stopped; its always been on and no-one has complained, even the performance people who buts large loads on the OSA cards. Its doesn't seem to be a big deal under LPAR in that all the attendant VM wakeup and paging for each EC is not necessary. >PS It should be enough to set the sysctl.conf once >unless >you boot the same system one day in LPAR and the other >day in a virtual machine. I set the vm differences in boot.local for several reasons. 1) I can have a standard build that I can give to either an LPAR requestor or VM EC requestor. Any differences are then determined at IPL time rather than having to make modifications for each user. If its native, all they get is a message from boot.local. If its VM, they get the hertz time turned off and the insmod of the extint module for shutdown notification. I can then add things, such as the fix packs to a single system, rather than having to put them on a VM and an LPAR version. Operationally, I have about 20-30 Lpars (peak 45) and about 30-50 EC machines (peak 250) at any give time spread over 5 differenct CEC's with over 100 different respacks of various releases (SuSE 7, SuSE7+SP1, SuSE8, SuSE8+SP2, SuSE8+SP3 (in beta), RH 7.1, RH 7.2, RHEL3 (in beta), and the SuSE systems come in both 31bit and 64bit versions. Having a VM version and an LPAR version would double my collection! 2) Some of my users do want to boot under VM and in LPAR to compare performance. 3) Sometimes I have to physically isolate some of the LPAR machines; only my build LPAR can access them. So I have to be able to IPL my build machines in either LPAR or as an EC, depending on what I have to work on and repair. I would rather have a single build system that will accomodate wither VM or Native rather than having to have two build respacks. ===== Jim Sibley Implementor of Linux on zSeries in the beautiful Silicon Valley "Computer are useless.They can only give answers." Pablo Picasso __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com
