<br><br><div class="gmail_quote">On Fri, May 27, 2011 at 11:54 PM, James B. Byrne <span dir="ltr"><<a href="mailto:byrnejb@harte-lyne.ca">byrnejb@harte-lyne.ca</a>></span> wrote:<br><blockquote style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;" class="gmail_quote">
<br>
On Fri, May 27, 2011 14:36, Jack Bailey wrote:<br>
> There are lots of good reasons to virtualize.<br>
><br>
> <a href="http://www.vmware.com/virtualization/why-virtualize.html" target="_blank">http://www.vmware.com/virtualization/why-virtualize.html</a><br>
><br>
> Jack<br>
><br>
<br>
As it turns out, that was one of the net resources I had in mind<br>
when I described what I found as mostly puff and smoke. This is<br>
what this site claims as advantages to VM:<br>
<br>
> Top 5 Reasons to Adopt Virtualization Software<br>
<br>
> 1. Get more out of your existing resources: Pool common<br>
> infrastructure resources and break the legacy “one application<br>
> to one server” model with server consolidation.<br>
<br>
I have difficulty with this statement on so many levels that it is<br>
hard to know where to begin. Perhaps the most egregious is the<br>
mindless equating of server with host. What measurable benefits<br>
accrue to a firm from 'breaking the legacy', whatever that means.<br></blockquote><div> </div><div> </div><div>It depends how you do this:</div><div> </div><div>Many of our clients run SQL on a differen server than SMTP/IMAP/POP3 and file & print sharing - thus 3 or 4 servers. Now they can deploy 1 large server and run everying on different VM's - they still get the same security and isolation, but save some cost.</div>
<div> </div><div>OR, they can have 2 servers with a shared SAN and have everything running on those 2 servers and have high availability. Something they probably didn't in the past in any case.</div><div> </div><div>
</div>
<div> </div><blockquote style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;" class="gmail_quote">
<br>
> 2. Reduce data center costs by reducing your physical<br>
> infrastructure and improving your server to admin ratio:<br>
> Fewer servers and related IT hardware means reduced real<br>
> estate and reduced power and cooling requirements. Better<br>
> management tools let you improve your server to admin ratio<br>
> so personnel requirements are reduced as well.<br>
<br>
Personally, my experience is that, if anything, running multiple<br>
systems on a vm host measurably increases the administrative burden<br>
per host. For one thing, you now have multiple instances to update<br>
and to keep secure whereas before you had one OS to worry about. If<br>
we had tens or hundreds or thousands of servers then yes, I can see<br>
the benefits. We, however, do not deal with equipment on that<br>
scale.<br></blockquote><div> </div><div> </div><div>Again, this is about saving hardware, power, heat and storage. One could very easily replace a rack full of servers with just 3 or 4, or so and thus be more green - save some space, power and heat. </div>
<div>Effectively you still have the same amount of OS / applications to run, but you're using less hardware</div><div> </div><blockquote style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;" class="gmail_quote">
<br>
> 3. Increase availability of hardware and applications for<br>
> improved business continuity: Securely backup and migrate<br>
> entire virtual environments with no interruption in service.<br>
> Eliminate planned downtime and recover immediately from<br>
> unplanned issues.<br>
<br>
I suppose that moving VM instances as file systems provides a real<br>
value by eliminating the setup and configuration required to get<br>
bare metal to flash up in a usable fashion. This is in fact the<br>
only area that I see a real advantage to VM over bare metal<br>
installs.<br>
<br>
> 4. Gain operational flexibility: Respond to market changes with<br>
> dynamic resource management, faster server provisioning and<br>
> improved desktop and application deployment.<br>
<br>
I have no idea how deploying VMs to a company's desktop workstations<br>
could possibly benefit the firm.,<br></blockquote><div> </div><div>I can provision a new VM to a client withing minutes. A server takes more like an 30minutes to an hour to get up and running. </div><div> </div><div> </div>
<blockquote style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;" class="gmail_quote">
<br>
> 5. Improve desktop manageability and security: Deploy, manage<br>
> and monitor secure desktop environments that users can access<br>
> locally or remotely, with or without a network connection, on<br>
> almost any standard desktop, laptop or tablet PC.<br>
<br>
Again, how is this accomplished and what are the advantages over a<br>
single OS install? None of the above claims have anything to do<br>
with VM per se as far as I can see.<br></blockquote><div> </div><div>Well, each end user desktop could be saved as a VM to make re-installation, or "uprgrades" much easier.</div><div> </div><div> </div><div> </div>
<div> </div><blockquote style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;" class="gmail_quote">
<div><div></div><div class="h5"><br>
--<br>
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James B. Byrne mailto:<a href="mailto:ByrneJB@Harte-Lyne.ca">ByrneJB@Harte-Lyne.ca</a><br>
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