- High Availability
- Distributed resource scheduling & vMotion
- Robust management toolset for automating routine tasks
System Engineer with 10,001+ employees
By centralizing the customization process while removing common hardware problems, it makes the provisioning and deployment of virtual servers and clients quick and predictable.
What is most valuable?
How has it helped my organization?
vSphere provides the infrastructure framework to manage server and client systems in a multitude of user environments, from dedicated virtual workstations to short-term use systems. vSphere makes the provisioning and deployment of virtual servers and clients quick and predictable, centralizing the customization process while removing common hardware problems.
What needs improvement?
Fault Tolerance, which was introduced in version 5.5 and improved in 6.0, is a promising feature that has potential to ensure highly critical system availability in the enterprise environment. It presently has vCPU limitations which makes its deployment scenarios limited, but VMware has made great strides between the two versions, indicating that its usefulness will continue to improve.
For how long have I used the solution?
I've used it for four years.
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860,632 professionals have used our research since 2012.
What was my experience with deployment of the solution?
ESXi has some specific hardware requirements that administrators should make sure they are able to meet before deploying. While the platform can run on a considerable range of hardware, various features make use of specialized virtualization instruction sets in the hardware CPU that make the hypervisor suited to only a fraction of the common server hardware on the market. This is not a bad thing, as the benefits from these advanced features are well worth the cost of more advanced hardware. This is the only circumstance in which I have encountered obstacles to deployment.
What do I think about the stability of the solution?
No. The vSphere hypervisor is exceptionally stable, and the higher-level vSphere environment is quite adaptable to a fluctuating datacenter environment.
What do I think about the scalability of the solution?
No. The ability to expand the capacity of the vSphere environment is one of the core capabilities of the product.
How are customer service and support?
Customer Service:
Efficient and knowledgeable.
Technical Support:Good value, particularly considering a support contract is required with the purchase of vSphere licenses.
Which solution did I use previously and why did I switch?
No previous solution was used.
How was the initial setup?
It's straightforward, as vSphere is a mature product with well-rounded documentation, and an easy-to-understand interface.
What about the implementation team?
Our system was installed by a vendor team, but was configured in-house. Our vendor team provided a solid architecture solution, but it was insufficient for our requirements.
What's my experience with pricing, setup cost, and licensing?
Licensing is not a major obstacle to adopting this product in an enterprise environment. VMware does offer some specialized vSphere editions for small business environments in which cost may be a considerable factor. There is a wide range of options provided by VMware with suitable price points for each license.
Which other solutions did I evaluate?
We did not evaluate other options.
What other advice do I have?
Have a plan for system virtualization before pursuing vSphere. Often, the actual needs of an organization, particularly small and medium sized, are overestimated which leads to spending more for a product or product license than is necessary.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
IT Systems Administrator at a tech company with 10,001+ employees
With vMotion, High Availability, and Distributed Resource Scheduler, we're able to administer hardware resources in a better way. But, it could use better DRS-friendly functions.
What is most valuable?
I'd say vMotion, High Availability, and Distributed Resource Scheduler, which have allowed us to administer hardware resources in a better way.
How has it helped my organization?
With High Availability, we have had only one incident where one of the hosts failed, and the VMs were moved immediately. It took about four minutes to complete migration, thus affecting operations minimally.
What needs improvement?
Reporting, and perhaps more DRS-friendly functions.
For how long have I used the solution?
We've used it for almost three-and-a-half years, and previously we were using older versions, such as 2.0.
What was my experience with deployment of the solution?
No, but that is relative. Sometimes issues are raised eventually.
What do I think about the stability of the solution?
No, but it does become difficult to have a standardized infrastructure.
What do I think about the scalability of the solution?
No, but I guess cost is the main obstacle.
How are customer service and technical support?
Customer Service:
So far, good service, but it's managed by our corporate office.
Technical Support:It's good, but it is relative. I have been able to resolve many of our issues using the web.
Which solution did I use previously and why did I switch?
I used to manage an IBM solution - SAN with VMware technology.
How was the initial setup?
It was complex, as the setup and management was not too friendly.
What about the implementation team?
We used a vendor team and the expertise was good, but it could have been better.
What was our ROI?
All I am able to say is that our SLAs have been achieved over the last two years.
What's my experience with pricing, setup cost, and licensing?
This depends on the particular scenarios. Ours is a big one, and requires full stability (Enterprise license). We manage four geographic areas (Mexico, China, Czech Republic and Brazil).
What other advice do I have?
Review the SLAs with customers and provide several options describing cost/benefits to them.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Perhaps what you say are in the old version, we switched to 5.5 and 6.0, the main problem encountered calculation for load balancing, and really should invest in SAN Storage Share, VSAN can stability control problem vMotion, HA because as you say "we have had only one incident where one of the hosts failed, and the VMs were moved immediately".
Buyer's Guide
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June 2025

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860,632 professionals have used our research since 2012.
Programmer at a tech company with 1,001-5,000 employees
We're able to to build, test, and take snapshots of VM's on a daily basis.
What is most valuable?
- The out-of-box application works well even without customization.
- vCenter web UI is great.
How has it helped my organization?
I work on it daily and it's easy to build VM's and take snapshots. I can also test the VM's as much as I want.
What needs improvement?
- vCenter web UI has the occasional bug.
- Sometimes it takes a while until the VM responds to a mouse click.
For how long have I used the solution?
I've used it for six months.
What was my experience with deployment of the solution?
None.
What do I think about the stability of the solution?
No.
What do I think about the scalability of the solution?
Haven't yet needed to scale.
How are customer service and technical support?
Customer Service:
Haven't needed customer service.
Technical Support:Haven't needed technical support.
Which solution did I use previously and why did I switch?
No previous solution used.
How was the initial setup?
Straightforward.
What about the implementation team?
In-house.
Which other solutions did I evaluate?
We did not evaluate other options.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
CEO with 51-200 employees
We have been able to create stable, enterprise-level services with it as the core product.
What is most valuable?
The stability in general, and the manageability of features like high availability, storage vMotion, and vMotion configuration via distributed switches.
How has it helped my organization?
vSphere is a core product in our services. Building our services on top of this product provides us the ability to create stable, enterprise level services.
What needs improvement?
Currently none, as the development of new features is already going at high speed.
For how long have I used the solution?
I've been using it for seven years, since v3.5.
What was my experience with deployment of the solution?
No issues encountered.
What do I think about the stability of the solution?
No issues encountered.
What do I think about the scalability of the solution?
No issues encountered.
How are customer service and technical support?
Customer Service:
8/10.
Technical Support:7/10.
Which solution did I use previously and why did I switch?
We previously used XenEnterprise and RedHat Enterprise Virtualization based on KVM. Due to the stability and lack of features, we switched.
How was the initial setup?
It was straightforward.
What about the implementation team?
We did it in-house by our infrastructure team who are VMware Certified Professionals.
What was our ROI?
Using the vCloud Air Network program, we are in a usage based program. So no upfront investments are made for licenses.
Disclosure: My company has a business relationship with this vendor other than being a customer. We are vCAN partners.
IT Director with 501-1,000 employees
We needed to reduce the number of physical servers and maximize CPU usage.
Valuable Features
- Redundancy
- Speed
- Security
Improvements to My Organization
I had 300 physical servers, but now I need only six. It’s less noisy, much cheaper, and has less of a tendency to get hot.
Room for Improvement
I want to see a better hypervisor.
Use of Solution
I've used it for five years, since.
Deployment Issues
Deployment requires a special proficiency.
Stability Issues
The product has good stability.
Scalability Issues
The stability is perfect, as long as you can afford it.
Customer Service and Technical Support
Customer Service:
We work with a company that provides this service.
Technical Support:We work with a company that provides this service.
Initial Setup
It was complex as we have many sites. Therefore, we needed to decide if we should put them all together in a single data center, or to use one instance of vSphere for all our data centers.
ROI
It's the best product on the market. I have never had anything that saved me more money than vSphere. I had 300 servers, each one cost us 15 thousand dollars, but now it’s much cheaper. Moreover, thanks to dynamic distribution I am able to maximize the servers' CPU usage.
Pricing, Setup Cost and Licensing
It requires one person to manage it on a full-time basis.
Other Solutions Considered
We tested Hyper-V, and it was awful.
Other Advice
It costs a lot. You should go to a VMware 6 course.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.

Dan GillmanSenior System Administrator at a manufacturing company with 201-500 employees
LeaderboardReal User
Please tell us a little more information. The review is very general and doesnt tell us anything accept you really like the product. Are you using vmotion? Did you pool the resources and does it provide more CPU or memory for your applications? Is everything running on one virtual switch? Did you use ISCSI or a NAS type solution? What made Hyper-V "Awful" ?
Vice President at a tech vendor with 51-200 employees
The Dell PowerEdge M520 is a general purpose server that scales very well.
The Dell PowerEdge M520 is a dual cpu socket, half-height blade server that offers up to 20 processor cores and 12 DIMMs per node with up to 16 other half height blades being deployed in a single M1000e blade enclosure. This powerful yet compact server is a great general purpose machine that offers scalability and performance in any size business.
Like other PowerEdge M series blade servers, the M520 operates independently of other blades in the m1000e and has the ability to mix different types of M series servers in the same enclosure.
The M520 uses the Intel C602 chipset and take up to two Intel Xeon E5-2400 or E5-2400 V2 series chips.
For each blade, a total of 12 DIMM slots are available for a potential total of 384GB of RAM spread between 3 channels for each CPU. Depending on the choice of cpu, it is able to operate memory with speeds of up to 1600 MT/s (megatransfers per second) with module sizes of up to 32 GBs DDR3 registered RAM.
On the front of the bezel are 2 USB ports, power button, blade release handle, and slots for 2 2.5” SATA, SSD, or SAS drives.
This server comes with an embedded PERC 110 SATA software RAID controller and can be upgraded to support SAS drives with the PERC H310, H710, H710p mini RAID controllers featuring 6Gb/s of throughput on a dedicated connection to the system board and RAID 0 and 1 capabilities.
Two mezzanine slots are available in the Fabric B and C I/O ports with options that include 1Gbit, 10Gbit adapters, Infiniband or Fibre Channel interfaces on a PCIe 3.0 bus. The M520 also comes with LOM (LAN on motherboard) in the two Broadcom dual port 1Gbit controllers. You’ll need to populate the rear I/O modules with the right types of switches to utilize your server’s network capabilities.
Up to 16 M520s can be installed in an m1000e. The power and cooling for the M520 is drawn from the M1000e enclosure which can hold up to 6 2700W hot-plug power supplies.
This is a 10U modular chassis capable of being populated with different PowerEdge M series blade servers.
Empty, the chassis weighs 98 lbs., fully loaded this modular can weigh a total of 394 lbs.!
The maximum weight of a M520 server is 12 lbs. and are 7.8” tall 2” wide and 21.5” deep.
Each blade can be remotely managed with iDRAC7 Express for Blades with Lifecycle Controller, or with a software upgrade license, iDRAC7 Enterprise for greater control options.
The M520 can run various Windows Server Editions Operating Systems as well as LINUX Red Hat Enterprise. Here is a lively video overview of the M520:
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Interesting, I wonder how Dell's server solution compares to the following systems:
• IBM Blade Center
• HP C7000 Blade Server
• HP Moonshot
Just curious, especially when we talk about power consumption, total memory & speed, latency, manageability, interoperability with other servers, modular, integrated security features, monitoring software, 10-40Gb switching fabric (NPIV) and extensibility and integration with SAN capability, IPv6 enabled, GPU/Cuda capable.
This would be an interesting conversation.
Todd
System Administrator at a cloud solution provider with 51-200 employees
We were able to transition from 20-25 physical servers on three to four racks to 500 VM's on 16 physical servers.
What is most valuable?
The ability to handle an entire virtual data center, keep costs under control, and move the workload without having a business impact.
How has it helped my organization?
Before virtualization, my company had 20-25 physical server, with one or more services each. These servers were placed in three to four racks.
Now we handle 500 servers (VM's) in half a rack, meaning only 16 physical servers. This solution improves cost, manageability, and growth.
What needs improvement?
The product is very mature and stable, but vCenter web interface response could be improved.
For how long have I used the solution?
I've used it for 10 years.
What was my experience with deployment of the solution?
Yes, but by support, we found the solution, a hardware driver for HBA component.
What do I think about the stability of the solution?
No issues encountered.
What do I think about the scalability of the solution?
No issues encountered.
How are customer service and technical support?
Customer Service:
I've only used them a few times, but they've always answered my queries very well.
Technical Support:It's very high.
Which solution did I use previously and why did I switch?
We used Xen and KVM, and we switched for the lack of manageability, stability, scalability.
How was the initial setup?
Setup is light work, but many components must be configured with vSphere documentation by hand.
What about the implementation team?
I implemented it in-house.
What was our ROI?
For every Euro we sold in infrastructure, we gained five to seven Euros in services, because we have less operation costs, a good time to market, and more infrastructure agility.
What's my experience with pricing, setup cost, and licensing?
The price can be very high, but in the case of a service provider with a VSPP program, you can offer the top class vSphere features for two to three sold VM. If you plan a little deployment I suggest bundle kits (Essential and Essential plus).
Which other solutions did I evaluate?
Yes, KVM and Xen (both opensource), and although they have no upfront costs, these are countered by very high operative costs.
What other advice do I have?
First try this product, evaluate the infrastructure sustainability, and purchase the correct license that fits your needs.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Technology Consultant, ASEAN at a tech services company with 501-1,000 employees
vSphere vs. Hyper-V
Recently I got some questions about this one. Who is better? Or who is cheaper?
I was worked in VMware and Microsoft, both covered virtualization products. Now, I’m working in one of Cloud Datacenter with many platform like Sun Solaris (Oracle), IBM AS400, IBM iSeries, IBM pSeries, Microsoft Hyper-V (the first Partner Hosted Productivity Cloud – PHPC in Asia), and VMware technologies (vSphere, vCloud and vCAC).
Based on that, don’t think too much about the platform. The most important is the SLA. All platforms is good as long as we manage the SLA. And use the most suitable platform for your applications. If you want to use Microsoft, then Windows Hyper-V 2012R2 is the right one. Don’t use any version below Windows 2012R2.
Anyway, back to the questions. Let’s make a simple requirement. This is roughly calculation.
Customer requirements:
They need to virtual all their infrastructure. 100 Physical Server with each servers have the specification: 2CPU, 8GB RAM, 100GB Disk. All Microsoft licenses are OEM.
Total Requirements:
- 100 x 2CPU = 200 pCPU
- 100 x 8GB RAM = 800GB RAM
- 100 x 100GB Disk = 10TB Disk
- 100 Windows Server 2012R2 Licenses
- Monitoring Tools required
- High Availability supported
Assumption:
CPU based (Option 1):
- Low CPU utilization, 10% average. 200 pCPU x 20% = 40 pCPU.
- Server configures with 2×6 Cores/CPU = 12 pCPU.
- Total server required based on CPU = 40 pCPU / 12 pCPU = 4 (Round Up).
- With N+1 roles (HA), then total servers: 4 + 1 = 5 Servers
RAM based (Option 2):
- RAM Utilized 80%. 800GB RAM x 80% = 640GB RAM
- Server configured with 128GB RAM. Maximum RAM utilized 80% then 128GB x 80% = 103GB (Round up)
- Total server required: 640GB RAM / 103GB RAM = 7 Servers (Round Up)
- With N+1 roles (HA), then total servers: 7 + 1 = 8 Servers
- For Microsoft Hyper-V, assumption required 2GB RAM for hypervisor. 128GB RAM – 2GB RAM = 126GB RAM x 80% = 101GB (Round Up). 640GB RAM/101GB RAM = 7 Servers. Total Server (N+1): 7+1 = 8 Servers
Because the application is highly memory consumption then we choice Option 2 (based on assumption and roughly calculation). I recommended to use the sizing calculator such as VMware Capacity Planning.
Licenses Required:
With Microsoft:
- 8 x Windows Server Datacenter 2012R2
- 8 x System Center 2012R2
- 1 x Microsoft SQL Server 2012 STD Edition -> For DB
TOTAL: $78,994*
*Web Price (Y2014), excluded support and CALs for MSFT products
With VMware:
- 16 x vSphere with Operations Management Enterprise Plus 5.5
- 1 x vCenter Server Standard 5.5
- 8 x Windows Server Datacenter 2012R2 -> For Guest OS
- 1 x Microsoft SQL Server 2012 STD Edition -> For DB
TOTAL: $123,053*
*Pricelist (Y2014), excluded SnS and CALs for MSFT products
In the end, all is your choices. Enjoy.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.

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vSphere Fault Tolerance was introduced from vSphere 4.x. And in vSphere 6.0, it is still called vSphere FT but in abbreviation for vSphere Symmetric Multiprocessor Fault Tolerance.