VM /ETC

Posts Tagged ‘capacity analysis’

I received the following offer in an email this week from VKernel and I thought I would post this information for all VM /ETC readers:

” .. VKernel is now offering FREE perpetual licenses of our Capacity Modeler software until 12/31/09. VKernel Capacity Modeler is an alternative solution to the high-priced VMware vCenter CapacityIQ.

Download VKernel Capacity Modeler now and get the same function for FREE

Recognizing that VMware CapacityIQ’s capacity planning and ‘what if’ functionality is roughly equivalent to VKernel Modeler, Vkernel is offering anyone that downloads Modeler between now and December 31, 2009 free perpetual licensing for unlimited CPU sockets.

Download the FREE VKernel Capacity Modeler and get the ability to quickly plan, simulate, and validate hundreds of real–world “what if” VMware resource allocation and VM deployment scenarios. With VKernel Capacity Modeler, user can perform:

• Capacity Planning
• Interactive “What If” Modeling Scenarios
• Proactive Problem Prevention
• Predictive Capacity Impact Analysis

If you want to quickly solve more serious VMware issues, download FREE trials of our Capacity Analyzer and Optimization Pack software.”

I haven’t had the chance to use either product, but I thought VM /ETC readers could benefit from this offer.

Note the “roughly equivalent” statement above. I cannot speak to a comparison of the two products, but I still feel that any capacity analysis and modeling tool for free is worth investigating. If any readers have any experience with this solution please comment for the benefit of others.

As IT budgets decline, old servers called to virtualization duty is an article written by Alex Barrett and Colin Steele on SeachVirtualization.com. Other then asking some pretty good virtualization sources their opinions , I think the article does a great job explaining why the expense of buying modern hardware still makes sense even in today’s economy. Whether to buy new servers is a common decision being made today as more and more companies are conducting capacity planning studies for consolidation to virtual infrastructure analysis.

Read the entire article for several great points, but here is one quote as an example argument:

“The first thing to determine is whether installing virtualization on older hardware actually saves money. Today’s servers are equipped with quad- and six-core CPUs that can deliver much greater consolidation ratios that single- or dual-core models, he said. “VI3 [VMware Infrastructure 3] is licensed per socket, so you’re paying the same cost for older CPUs but you’re getting less bang for your buck.”

But if the budget for new hardware simply isn’t there, consider the age of a server and how much life it has left in it. When identifying a candidate for a virtualization host, identify a box that is three years or younger and has “had a relatively low runtime,” the systems administrator said.”

Why is it that migrating to virtual infrastructure (VI) is most often considered to be the responsibility of the server administrators? Anyone who has already done it can tell you it involves much more than servers and hardware. Even for small companies, virtualizing servers potentially (and usually) involves networking, storage, security, and infrastructure services changes. In fact, it is often as involved and complex as moving your physical servers from one data center to another.

So why is there a perception that implementing VI is only a server team responsibility? Obviously, one reason is because on the surface it’s about installing and consolidating operating systems on server hardware. Another reason is because VMware, the source for all the interest in migrating to VI to date, has done such a great job marketing their products as just server installs. Read the rest of this entry »

How many VMs should run on each ESX host? The answer is determined mostly by the physical resources of the host’s platform (storage, ram, cpu, etc.). Before VI3 introduced ESX Clusters with DRS and HA squeezing as many VMs on each ESX host as possible was acceptable. Today it’s not just ESX host capacity, but ESX Clusters need to be take into consideration. Planning Cluster capacity means ensuring availability of VMs while maintaining acceptable host performance in a fail over scenarios.

First, what is a fail over scenario? The first thing that comes to mind is a problem. One or more of your ESX hosts unexpectedly crashed. This is considered unplanned downtime. Another fail over scenario to consider is planned downtime such as rebooting after applying ESX patches. For both of these types of scenarios you want to make sure your VMs stay online.

VMware’s solution for planned downtime is VMotion. The solution for unplanned downtime is the HA feature of ESX Clusters. When determining your ESX capacity be sure to allow room to leverage these features.

VMotion migrates a VM to a different ESX host without users losing connectivity. Evacuating an ESX server by VMotion enables you Read the rest of this entry »

I received an email announcing a new release of PowerRecon from Platespin. It sounds like features have been added to the product to take it from being a capacity analysis tool to a VI monitoring and reporting tool. I will have to stop by their booth and get the scoop.

From the email:

PlateSpin is announcing the general availability of PowerRecon 3.1., and the new Virtual Infrastructure Edition.

Highlights of this release:

VIE features:- Integration with VMware Virtual Center

- Discovery and inventory of the complete physical and virtual infrastructure

- Power and Cooling Reporting

- Virtual Infrastructure Chargeback Reporting

- Virtual Machine Sprawl Reporting

- Priced per CPU

Other noteworthy feature enhancements:- Group and matrix reporting capabilities

- Scalability enhancements

- Tighter integration with the virtual infrastructure layer

- Extended platform support