1) With VMotion it's tranparent and the VM doesn't miss a beat 2) No that I've seen
3) That's not a simple question to answer, it depends on the network load of the VMs. If you're consolidating some infrequently-used machines then shared NICs aren't a big deal, but if you're going to virtualize a file server or an Exchange environment with a couple hundred people on it it will be a VERY big deal. 4) Generally no. One of the excetptions is Server 2003 Enterprise and Server 2008 Enterprise - if you use Hyper-V as your hypervisor each Enterprice server license allows you to run 4 VMs. Roger Wright wrote: > 1. From a DR perspective, or perhaps just for rebalancing the load > on a host machine, how does moving from one host to another with > different HW impact the VM, or is it transparent? > > > > 2. Does Virtualization impact your domain security requirements in > any way? > > > > 3. NIC Utilization – Shared NICs or separate for each VM? > > > > 4. OS & App licensing – can we expect any reduction in licensing > requirements? > > > > > > Thanks! > > > > > > > > > > > > > > > > Roger Wright > > Network Administrator > > Evatone, Inc. > > 727.572.7076 x388 > > _____ > > > > *From:* Andy Shook [mailto:andy.sh...@peak10.com] > *Sent:* Monday, December 29, 2008 9:52 AM > *To:* NT System Admin Issues > *Subject:* RE: Virtualization Questions > > > > Roger, > > Opinions on this will vary, however, my responses… > > > > 1. Yes. Centralized storage that all hosts can see and access is > a must for Vmotion/HA/DRS as well as backups. Needs and budget will > dictate, however, I would have local storage only for the host OS (ESX, > etc.) and a SAN for all the VMs\vmdk files. > > 2. Acceptance of a dedicated VM is growing. I’ve personally run > many, many (police academy joke, if your didn’t get it) applications > with no issues raided from the vendor, YMMV by vendor > > 3. Load and amount of data usually dictate this. I’ve seen every > mainstream app virtualized and dedicated server, here in the datacenter. > > 4. I would say load and functionality. If you have ESX with > HA/DRS, then I personally don’t care where the VMs are just as long as > they are up. I have seen where shops will specify that a DC\GC has to > stay on the same host as an Exchange server, as an example. Forget > everything you know about server provisioning. In my experience, > dedicated servers that were running with dual procs and 4GB of RAM ran > wonderfully with a single core and 512MB in a VM environment. This is > one of the many, many (see above reference J) beautiful things that > virtualization brings to the table. > > > > Feel free to ping me off-list if I can help in any way. > > > > Shook > > > > *From:* Roger Wright [mailto:rwri...@evatone.com] > *Sent:* Monday, December 29, 2008 9:30 AM > *To:* NT System Admin Issues > *Subject:* Virtualization Questions > > > > Taking a look at the potential implementation of virtualization and have > several questions: > > > > 1. Does/should utilization of a SAN have a direct impact on > virtualization decisions? Is it better to go with local or SAN storage? > > 2. Do vendors who normally require a dedicated server accept a > virtualized server as equivalent? > > 3. What type of servers (DB, Oracle, F&P, etc.) don’t make good > candidates for virtualization? I would think that SQL/Oracle would > probably be least recommended. > > 4. Is clustering still possible with VMs? > > 5. What kind of logic determines the best combination of > host/guests? IOW, is it recommended to put all F&P servers together on > one host, or should it be a combination of F&P, DB, etc.? > > > > TIA! > > > > > > > > Roger Wright > > Network Administrator > > Evatone, Inc. > > 727.572.7076 x388 > > > > ET E-mail Signature Logo > > _____ > > > > > > > > > > > > > > > > > > > > -- Phil Brutsche p...@optimumdata.com ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
