1.Keep in mind there are some limitations with hardware in regards to VMotion. Specifically related to CPU. They need to be "compatible". See this to get more info:
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US <http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd= displayKC&externalId=1991> &cmd=displayKC&externalId=1991 2.None that I am aware of. 3.You will be sharing NIC's. If you are doing HA and DRS, there is no way to tie a specific VM to a NIC. I suggest as many NIC's in the host as possible. In my last job the host ESX servers had the following hardware: (4) Quad Core CPU's 128G RAM (4) Quad Port NIC cards + the 2 onboard NICs (2) Dual Port HBA cards 4. I think you can save on licensing with Hyper-V if you get the Data Center version. Not sure about that. But in general licensing is not what you save on in my experience. Chris Bodnar, MCSE Sr. Systems Engineer Distributed Systems Service Delivery - Intel Services Guardian Life Insurance Company of America Email: [email protected] Phone: 610-807-6459 Fax: 610-807-6003 _____ From: Roger Wright [mailto:[email protected]] Sent: Monday, December 29, 2008 10:32 AM To: NT System Admin Issues Subject: RE: Virtualization Questions - More Q's Great responses so far! You've all given me even more to think about. A few other questions: 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:[email protected]] 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 :-)) 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:[email protected]] 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 _____ ----------------------------------------- This message, and any attachments to it, may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are notified that any use, dissemination, distribution, copying, or communication of this message is strictly prohibited. If you have received this message in error, please notify the sender immediately by return e-mail and delete the message and any attachments. Thank you. ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
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