The tongue benefit is huge. Gotta keep up with them other guys ;) The other really useful case I see is in the dev/test environment. Say we want to get some good measurements from an app before they go production or to size them properly for their prod server purchase, but we have some pigs (uh, I mean very active developers writing code that is still in the early stages) skewing the results. We shove them off to the other LPAR until our target is LPAR looks the way we want it to ... and put them back later. No one is the wiser and no emails about what happened to my server!
Marcy -----Original Message----- From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Alan Altmark Sent: Wednesday, May 18, 2011 11:28 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: [IBMVM] zvm directions On Wednesday, 05/18/2011 at 12:07 EDT, Marcy Cortes <marcy.d.cor...@wellsfargo.com> wrote: > I don't see LGR as a load balancing solution at all. We will continue to use > our F5 load balancers as well as the WAS IHS plugin for that effort. I see it > more for a planned outage move for things you want to move away for a while > without the reboot. An excellent assessment, Marcy. :-) LGR was not designed to replace any application-level workload balancing solutions (F5). Those balancing solutions provide the needed HA in case you lose a VM LPAR unexpectedly. LGR will let you take back control of your VM LPARs. No longer will you need to get 15 application owners to agree on a time for you to take down and service the VM system. Their servers keep running and the application monitor dashboard shows green. Oh, and I suppose there is an additional benefit in that if someone says, "*I* can relocate a server to a different rack in case it starts to overheat!" you can stick out your tongue and then say "*I* can relocate a server when I want to. My machine doesn't overheat." :-) Alan Altmark z/VM and Linux on System z Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott
