> -----Original Message----- > From: Ward, Garry [mailto:[EMAIL PROTECTED] > Sent: Tuesday, July 29, 2003 11:34 AM > To: [EMAIL PROTECTED] > Subject: Re: Whither consolidation and what then? > > > Philosophical question? > > The heart of the matter lies in why so many images in the first place? > If I need a half dozen images of Linux to service the Web, but those > Linux images can all be running under VM, what is different between > Linux and VM that lets VM handle the concurrent workload better than > Linux can? > > It is a variation of the old arguement as to which is better, VM and > serveral VSE guests or one MVS instance. >
The answer to this question may be: Which can generate more aggregrate throughput with acceptable response time? 1) A number of "single use" Linux images running under zVM or 2) A single Linux image. I would guess this would depend on the relative effeciencies of the two schedulers. For example, what happens if an application running on Linux (say a CGI) "goes crazy" and just eats up CPU? In a "single Linux image" situation, will Linux take automatic action to prevent this process from starving all the other processes? In a zVM scenario, with multiple "single use" Linux images, will zVM better manage the CPU? I truly don't know. -- John McKown Senior Systems Programmer UICI Insurance Center Applications & Solutions Team +1.817.255.3225 This message (including any attachments) contains confidential information intended for a specific individual and purpose, and its' content is protected by law. If you are not the intended recipient, you should delete this message and are hereby notified that any disclosure, copying, or distribution of this transmission, or taking any action based on it, is strictly prohibited.
