On Mon, 14 Sep 2009, [email protected] wrote: > there are a lot of studies out there, but they are almost always from the > virtualization companies.
yep. i particularly love all the brocurewear which has all these useless graphs which basically show that the more you pay the virtualization company the more you save.. > I've seen a lot of IT managers jump on the virtualizaiton bandwagon, but then > when forced to defend their numbers have been unable to do so. yep. that's basically my problem. i'm also not seeing the justification for the associated infrastructure for example, why have 4 GigE drops per server, when we have 400 servers in a business unit that do around 600-800 Mbps peak across every interface and every server? why have a lot of shared storage when we basically do no i/o (as well as no CPU and no network). > one thing that a lot of people initially see is 'hey, we are reducing the > number of servers that we run, so we will also save a huge amount of sysadmin > time', what they don't recognize is that you have the same number of systems > to patch (plus the new host systems that you didn't have before), so unless > you implement management software at the same time your time requriements go > up, not down. yeah, well since i've got a strong configuration management background that is one thing that is obviously wrong. i spent quite a bit of time beating up some citrix reps drilling down into what they can do for box builds and configuration management, and virtualization's approach was basically to increase the velocity of being able to do the disk duping approach to deployment and configuration management which does nothing for life-cycle configuration management (e.g. changing /etc/resolv.conf on every existing deployed server). i've seen virtualization pitched in CTO/CEO-focused materials as "solving" configuration management, however. _______________________________________________ Tech mailing list [email protected] http://lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
