Why too many VMs is a bad thing

Posted on Wednesday January 23, 2019

Desktop virtualization allows you to deliver computing resources to workstations in your network. Those resources are packed into virtual machines (VMs), which can be deployed as easily as any file. However, there are risks associated with trying to manage an overwhelming number of VMs.

The problem with VM sprawl VM sprawl is a phenomenon that occurs when there are too many virtual machines on a network. Keep in mind that VMs have the same licensing, security, and compliance requirements as your other computers and servers. So when administrators are given free rein to create as many virtual instances as they want, issues concerning the security and management of VMs begin to appear.

Having too many virtual instances running at the same time exhausts server resources. In fact, a majority of virtual servers are idle, which means companies are paying for licenses they're not using. Unused VMs are also not patched and maintained properly, enabling attackers to infiltrate a network.

However, there are some things you can do to prevent VM sprawl.

VM creation policies Businesses should have policies in place for limiting the creation of unnecessary VMs. For instance, you can have a policy that forbids users from deploying a new VM unless they specify a good reason. This way, they're more likely to think twice before requesting resources they may not need. You should also place limits on how many VMs each department can create to keep your virtualized environment small and manageable.

VM inventory Documenting every VM in your network should be standard protocol in your company. They should be organized by their purpose (e.g., backups, app testing, resource-intensive software usage), who they are assigned to, and when their software was last updated. This will make it easier to review which VMs are necessary to your operations and decommission the ones that no longer serve a purpose.

Life cycle management For businesses with large-scale VM deployments, life cycle management tools can give you total visibility into how many VMs are running on the network, how they're being utilized, and who created them.

Such tools allow you to set time-based policies that remove VMs that were needed for only a short time (e.g., those used for app testing). This ensures you're not wasting resources on idle VMs.

Although virtualization is a powerful solution, it must be carefully managed if you want to realize its cost-cutting and efficiency-boosting benefits. If you want to truly benefit from virtualization, call us today.