VMware vSAN Pros and Cons

VMware vSAN Pros

Yves Sandfort
CEO / Cloud Evangelist at Comdivision Consulting GmbH
We can also create test cases. We can even throttle down performance or release more performance. So, we can run more precise test scenarios.
When we do to do more scaled load testing, we can run more dense workloads and still have the same results across all specific nodes
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Paul Letta
Systems Administrator at a K-12 educational company or school with 201-500 employees
By eliminating dependency on that back-end storage, we now depend on everything that's in the VMkernel with vSAN. We eliminate the middleman.
You get the benefit of local storage, but you have the protection of shared storage.
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Jose Fuentes
Infrastructure Architect at a media company with 10,001+ employees
To me, VMware is a leader of the visualizations. I think everyone just follow VMware.
I have used VMware for 15 years and I never had any problems with stability.
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Vijayakumar Arumuga Nadar
R&D Architect at a tech services company with 11-50 employees
vSAN provides default HA configurations, where if any host goes down, the VM moves around within the host. Even though the disks are local, the VMs moves around with the vSAN disk and vSAN provides a high availability on its own.
vSAN is scalable for us. If any additional capacity needs to be included, we just add to the host and configure the vSAN cluster.
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Michael Cayouette
Team Lead System Integration at a tech company with 201-500 employees
Flexibility, growth, and expansion are probably the more important features for us. As our environment grows, the more users come on, the more VDI workstations that we need, we can easily expand either horizontally or vertically with the environment
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Joseph Lepek
IT Manager at VelocityEHS
The valuable features of vSAN are that you can get it up and running quickly, you get redundancy built-in, and it's pretty much the perfect solution for a cluster.
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Eric Garrison
Customer Engineer at ATTO Technology
The most valuable features for us are the ability to scale out the nodes independently, and the flexibility of the nodes. We can put almost any type of server in there with our connectivity and everything works great.
Scalability in vSAN has been really good. It's very easy to add nodes in, to automatically generate the drives and the disk groups. It has been a piece of cake, surprisingly so.
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Philip Sellers
Solutions Engineer at a insurance company with 1,001-5,000 employees
The most valuable features of vSAN are its simplicity to deploy and that we can use commodity disks in our servers without complexity or need for external storage arrays or storage specialists on our teams.
The features of vSAN allow us to reduce our operational complexity to a large degree.
We are finding that vSAN is a lot more scalable and adaptable, because we can go in with hybrid arrays for our lower-end storage needs or with all-flash versions of vSAN for places where we need more performance, and it's coming in at a lower cost point than an actual traditional array.
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Aaron Reiss
Infrastructure Engineer at Boys Town
The most valuable features are ease of deployment, and ease of management. If you compare it to other software-defined storage products, it's much easier. It's a checkbox. It's lot easier to manage.
I like vSAN because they release features incrementally, every year, and you don't have to upgrade your hardware to get those features. If you bought a traditional SAN, you would have to upgrade your hardware constantly, every three years: You would get it, and it is how it is for three years. But on vSAN, you upgrade when you have to, when your hardware gets old or when you need more capacity. It's great, you get new features constantly.
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Barbara MacKenzie
Head, IS Operations & Infrastructure at Sydney Adventist Hospital
The most important feature to me, in my role, is cost. In the renewal cycle for storage, it was about a 40 percent saving compared to going to an all-flash array, which is what we first looked at doing. Secondly, performance: we need clinical data access in five seconds and need to do everything we can to retain that metric. Thirdly, I was really pleasantly surprised during the data migration across to vSAN, that it happened almost instantly whereas, in the past, migrating from array to array was an arduous and fraught process.
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VMware vSAN Cons

Yves Sandfort
CEO / Cloud Evangelist at Comdivision Consulting GmbH
When we talk about improvements for vSAN, there is some way to go from a at least stability perspective. Adding all these new features is nice, but we are now at the level that most of the features you need in production are there.
Upgradability could be a bit easier sometimes. We are now where vSAN can be updated without ESXi, but there is still enough dependency. So that would be good if that actually would uncoupled even more.
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Paul Letta
Systems Administrator at a K-12 educational company or school with 201-500 employees
I see room for improvement with vSAN in particularly in the reporting realm. Now, with vSAN 6.7, they're starting to include vRealize Operations components in the vSphere Client, even if you're not a vRealize Operations customer. So, that's really good. It exposes some really low-level reporting. I would like to see more of that. However, you have to be a vRealize Operations customer to obtain that. I would like to see more include of this included in the vSAN licensing.
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ManagerT5097
Manager, Technical Systems at a healthcare company with 5,001-10,000 employees
We would really like them to look at what Nutanix did for day-one/day-two operations deployment: Bringing in the equipment, getting it deployed, getting it setup, and ease of use of one-click for deploying our 30-node solution. With vSAN we had to go into each one individually and set it up.
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Learn what your peers think about VMware vSAN. Get advice and tips from experienced pros sharing their opinions. Updated: April 2020.
419,052 professionals have used our research since 2012.
Jose Fuentes
Infrastructure Architect at a media company with 10,001+ employees
It is an expensive solution.
The vSan product uses a software system called Vsphere to monitor the system. It is sometimes difficult to manage the PCs within the systems.
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Vijayakumar Arumuga Nadar
R&D Architect at a tech services company with 11-50 employees
There is a room for improvement on the latest version of compatibility with the VMware product, especially for vSAN and with other vendors on their motherboards and driver configurations.
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CTO300f
CTO at a healthcare company with 10,001+ employees
It would be much improved if we could somehow integrate a better backup with it. Right now, we're using Veeam and it's okay, but I would like more of a VDP vSAN solution. That would be excellent. The VDP, at least the last time we looked at, it was just not quite there.
I would have liked it to have been more scalable. It's scalable but not as much as, for example, the ScaleIO systems were or the Kaminario
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Joseph Lepek
IT Manager at VelocityEHS
The product can be improved in a couple of ways. One of those would be that they have a lot of hidden features, that are through the CLI, that would be great to have in the GUI, or just be more open about those features. It's something called RVC. It's a tool in the back end. It's a really great tool, but I had to find it through Reddit. So more information on stuff like that would be great. Also, in the user interface, giving us more features and more reporting that we can do from vSphere itself would be helpful.
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Eric Garrison
Customer Engineer at ATTO Technology
The biggest room for improvement I see in vSAN is the lack of SAN connectivity. I've kind of joked around that there is no "SAN" in vSAN. And it's something that we've worked to try and introduce some options for, and we're going to continue to work towards that.
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Philip Sellers
Solutions Engineer at a insurance company with 1,001-5,000 employees
I see room for improvement for vSAN just around general hardware compatibility and expanding that sort of matrix.
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Aaron Reiss
Infrastructure Engineer at Boys Town
External storage would be a good thing to have in the next release, something other than iSCZI, something a little more, not HA, a little more production-oriented, than iSCZI.
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Learn what your peers think about VMware vSAN. Get advice and tips from experienced pros sharing their opinions. Updated: April 2020.
419,052 professionals have used our research since 2012.