Nutanix Cloud Infrastructure (NCI) Reviews

We are a reseller and Nutanix Acropolis AOS is one of the products that I have experience with. I have three nodes, and I am very satisfied with it. I deploy my ERP and my CRM into this infrastructure.

This solution provides very good opportunities.

The most valuable feature is the one-click to update the firmware and software. This is a very good feature for me.

The access speed needs to be improved.

I would like to see official compatibility with Red Hat in the future. This is important because we have a lot of customers who are using Red Hat.

We have been working with this product for approximately a year and a half.

The stability is very good.

The scalability is wonderful, as it is very easy to increase scale.

Our clients are medium and large-sized companies.

Nutanix technical support is very good. The documentation and the community are also very good. There are a lot of blogs in the network and they respond very quickly when we have a problem.

The initial setup is very easy. The length of time required for deployment depends on the packages and functionality. In some instances, we have deployed in one minute, whereas in others, it has taken 30 minutes.

We have a team of developers and they are responsible for the deployment we use in the company.

Overall, this is a very good product. I would say that it is a Top of the World solution.

I would rate this solution a nine out of ten.

We have moved to Nutanix AOS as our one-stop hyper-converged solution for VDI and Virtual Servers. We have implemented Nutanix AOS in all our domains to replace old architecture. Before Nutanix, we used a mixed environment of HP Blades, Dell "Pizza Box" servers, a combination of local and shared storage, and a mess of networking hardware to make it all work. Now with Nutanix AOS and cluster, this has simplified everything from standard operating procedures to modification and scalability. Now our new Standard Operating Procedures are much more "Standardized."

Nutanix AOS has improved our datacenter in the way of availability, scalability, and speed. The Nutanix clustering provided by AOS has ensured more uptime and speed of delivering existing applications. AOS also offers fantastic ease of expanding our infrastructure. Initially, Nutanix was our VDI Backend solution, then we started migrating all virtual server infrastructure over to an entire Nutanix solution as well. Since then we have been expanding on both and providing end-users an amazing experience.

One-Click Upgrade and Foundation is the most valuable feature. One-Click Upgrade makes upgrades and LCM a breeze. Prior to Nutanix One-Click Upgrade, upgrades and LCM were overly cumbersome and time-consuming. Foundation provides an easy, yet very structured, approach to cluster modification (adding or removing nodes). Prior to something like Foundation, the process to scale out additional infrastructure was also cumbersome and tedious. Nutanix has completely simplified both of these processes and has made it very easy to focus more time on other things.

The One-Click Upgrade process could/should offer the ability to integrate with 3rd party drivers. For example, we use NVIDIA Grid graphics cards. It would be amazing if, during the One-Click Upgrade process, we could "slipstream" additional VIB drivers for ESXi into the upgrade process. Otherwise, we are left to a typical upgrade/maintenance window process in order to keep ESXi updated with 3rd party drivers for additional hardware installed in each node. If the One-Click Upgrade process could implement this feature, this would limit downtime maintenance as well.

I have been using Nutanix Acropolis AOS for five years.

Excellent. The best I've seen.

Excellent. The best I've seen.

Technical support has been absolutely amazing. Again, the best I've seen. We felt like the Nutanix Bible didn't quite cover all the bases that we wanted to know more about. On a whim, we asked for a more technical deep dive and support provided us with a 1 time deep dive on-site to learn more about the product and troubleshooting. A support representative came on site and provided us with a bunch of troubleshooting scenarios (in a lab environment) in which we learned some "Tier 2+" troubleshooting methods.

HP/Dell architecture. These proved as an overly tedious and dead-end solution.

Straightforward. I was new to Nutanix but felt completely comfortable diving right in and taking lead.

Our initial setup was supported by a vendor team who was top notch.

The pricing from my experience is, unfortunately, a necessary evil, however, the initial setup cost could be a waste, depending on your comfort and skill level. I say comfort first because the setup is actually very easy and straightforward once you understand the foundation process. It would really depend on your experience and comfort moving to new infrastructures.

Not really. Once we found Nutanix, all other options seemed like lesser options.

Way to go Nutanix. Keep up the great work. We look forward to a very long term relationship.

We use Nutanix Acropolis AOS for the high availability that we get with it. The platform's extremely stable and other nice things that we like about it is that if we have to move the server or anything, it's not a lot to move and power consumption is a big thing for us as well.

My primary use case of this solution is that it helped me solve all of my use cases. I can create an integrative private cloud in a data center, create a hybrid cloud, public cloud, and near-site data recording. For example, there are lots of sites that do not have the data there so I can create data because Nutanix also has got it stored on the nodes. It takes care of storage on the nodes. I can build storage on the nodes, compute them, give the clients who already have a small data center within themselves but they do not have it externally. By using storage on the nodes in Nutanix I can give them the external.

We primarily use Nutanix as our base environment where we host all our database servers. We also host our active directory on it, our mail servers, and all of our bare-metal systems combined into one unit. Then we use Inuvika for the VDI environment on top of Nutanix.

One of the benefits this solution has had for my organization is space consumption. Space consumption was reduced by approximately 40% because if I had gone with another kind of traditional, or open-world solution, then I would have not saved my floor space. Another way it has benefited my organization is because of the energy consumption.

I definitely find the reduced power consumption very valuable. Another aspect I really like, when one compares Citrix to VMware, is the interface where you talk directly to your VM from the present software.

On-demand scaling is the most valuable feature, I can keep on scaling on-demand.

With Nutanix, if I do three or four nodes if I look at the traditional environment I have to really figure out the wave concept. Connect wave one, wave two, wave six, wave five. In Nutanix I don't have any of these issues. Lastly, deduplication. Deduplication and erasure coding

As of now, Acropolis and VMware cannot talk to each other. Until we have some kind of interface, it would be much better for Nutanix if they built an interface that can talk. Otherwise, if I have a VMware stack and I already have a Nutanix stack, I can create containers, I create clusters on VMware, I create clusters on Nutanix. All of these clusters cannot talk to each other. Then it has to be then subverted as parallel execution.

I would suggest that this could perhaps be switched. That is so far the only change I would like. I would like it if they could fix the instance where you double click on a VM and it opens the VM instead of the setup.

We've only been using Nutanix Acropolis for a short time now so we haven't gone into full production with the product yet.

This product is very scalable. We currently have 60 users. One of the things I like about it is that you can add extra nodes without any problem. Something we are currently looking at for the future is to put a smaller cluster on each side, where we can then, overnight, replicate the data from the site to the primary cluster. That's one of the other reasons why we looked at Nutanix instead of VMware and Citrix.

We had only one query so far, and the support team was excellent. They came back to us immediately and their service was excellent.

We've only been using Nutanix Acropolis for a short time now so we haven't gone into full production with the product yet.

The entire setup took us half a day. We used a consultant for the deployment. The service I received from them is unbelievable.

One of the major problems with IT in South Africa is that licensing fees are 14 times more expensive than anywhere in the world.

I would rate this solution an eight out of ten. If they develop the interoperability then it would make it a ten.

We looked at other options like VMware and Citrix, but Nutanix was the only solution that offered us scalability and the option to add extra notes without any problems.

I would rate it a nine out of ten.

Our primary use case for Nutanix is removing the classic 3-tier architecture and switching to hyper-convergence. 

Migrating from the 3-tier architecture to HCI helped us to free up rack space, remove the old hardware, and run systems on the new platform. 

There was a four-rack, and now there are ten units of hardware. It's really cool and fantastic.

It is now managed from one interface, covered by technical support and it's homogenous. If you need to expand a cluster or storage then all you need is just add new nodes. You don't need to buy new storage, you don't need to expand your SAN, and so on.

Now, all of the systems run on the same hardware with the same software, which can be managed from a single pane of glass. All you need to know is AOS. You don't need to learn about storage, SAN, or virtualization. It's easier to start with Nutanix than start with classic architecture.

The software features which really can improve the organization are deduplication and compression. These really can help to save a lot of space. On the non-homogenous systems, we achieved approximately 2:1 space savings, which is great.

We really love the Lifecycle manager and one-click upgrades. All you need to do is run the upgrade procedure and watch it go.

You don't need to update firmware, software, hypervisors, and so on by yourself. LCM can do it for you. It really can save a lot of time. LCM will install only compatible firmware and software, so you can't install (for example) unsupported firmware and break down your system.

LCM is a really cool feature and one of the best in the market. I have never seen anything like this before. 

I think there is a lot that Nutanix can improve in AOS, in particular, moving tasks such as creating trunked networks and managing nodes from the CLI to Prism Element.

I would like to see more information in Prism Element about how Curator works. 

There is a lot of functionality in Prism Central, but sometimes you want to see those features in Prism Element. One of them is RBAC. If we have one small cluster, and we need RBAC, we must install Prism Central. This is an inconvenience and I hope to see this feature in Prism Element in the next releases of AOS. 

We are using Nutanix solutions based on AOS since 2017. 

Nutanix AOS is a very stable system. You can lose drives or nodes, depending on your replication factor, and you will not lose your data. 

It's very easy to scale. You just add new nodes, increase compute, and increase storage at the same time.

Nutanix has one of the best technical support groups I've ever seen.

They answer fast and they solve problems fast. They don't ask you a lot of unnecessary questions; rather, they just do the work.

Previously, we used different solutions from different vendors. We needed to put it all together, and Nutanix helped us.

Setting up a new cluster is easy and the documentation covers this process.

They are very highly qualified specialists. 

We did not evaluate other options before choosing Nutanix. 

My advice is that deduplication and compression can save money, so use it. 

We have had customers who wanted new hardware and new software with a certain price point in mind, and didn't want to pay the VMware licensing. We switched them to Nutanix Acropolis.

Our clients like several features including the micro-segmentation flow, the one-page management through Prism, and the LCM (Life Cycle Management) that Prism offers.

There are several features that need improvement. Some of the areas are:

• The Nutanix flow is only for micro-segmentation functionality.
  
• It doesn't integrate with their cloud solution.
  
• It's only for on-premises, even though they have micro-segmentation, it doesn't extend it through the cloud.
  
• It (Flow) doesn't work with the XI frame.
  
• Life Cycle Management is very simplistic for the HPE DX.
• Some of the applications are not supported yet.

We have to look at the ecosystem that Nutanix is trying to create. It's lacking in some features but overcompensating in others. They are trying to be holistic, but they have a lot to catch up on when it comes to VMware. For example, they only support Citrix, and if you run Nutanix Acropolis you can't run VMware Horizon. There are limitations and the Kubernetes solution is limited.

I have been dealing with Nutanix Acropolis for quite a while. I have many certifications with Nutanix.

This solution is stable.

The scalability is fine, as it is advertised, but I can't attest to any performance indicators because I haven't stress-tested it.

Nutanix does a superb job with technical support. Technicians who work your case answer their phones.

It's a good alternative, but it doesn't have all of the features. It's not on par with VMware but it is a potential alternative. It's similar to comparing Apple to Oranges.

If you are invested in the infrastructure and that is what you have to consider, but it's not easy. Overall, it's good software.

I would rate this solution a seven out of ten.

We like that the size of the box is 1U or 2U only, and all the servers are fit into that box. The ease of operation is there. All the servers and the SAN storage are inside the box. So there are no wires, cables to manage. Secondly, since it is a hyper-converged infrastructure, we can scale up very easily. Suppose, for example, we were using 24 TB SAN last year, and now we are increasing up to 96 TB SAN. That is very easy to do with Nutanix. Just install the hard disk, enterprise-grade SAS or SSD, and expand that particular SAN. So within a short span of time, we can increase the capacity of the RAM or the hard disk. With how compact the equipment is it saves us a lot of space in the racks. 

In previous years we had six to seven server rooms, those are consolidated to only one server room now. We have only one server room and the space of that server room is hardly is 200 square feet. Cooling is easy, the amount of cooling needed is also reduced, so the administration becomes very easy. Reports are generated very easily. Additionally, we can configure the machines, we can create the VDI, for example, at a fast pace. Within four, five minutes, we are able to create the machine.

Pricing and varieties of options could be better. I represent an educational Institute, higher education. So, the cost is a major concern. Secondly, we have the 1000 and 3000 series. So we would like to see that graphic virtualization. It should support all the open standards as well as Nutanix. If the other vendor brought some SAN or NAS, it should be very compatible with that. I would rate it at a nine on a scale of ten.

We have been using Nutanix Hyper-Converged Infrastructure for three years. We use the 1000 series.

It is very stable and scalable also. So even if we are facing the power problems, the machine restarts immediately after the power is resumed, and the machine is a rugged one. So definitely a stable machine.

It is very scalable and easy to scale quicly.

The technical support is also very nice. They have partner support and direct Nutanix support.We are getting better support from Nutanix. So I can rate them with an A grade.

The Nutanix Hyper-Converged Infrastructure is easy to install. Initially, it took around one and a half days to understand the complete setup, but now once we understand the setup, we can install the complete setup within two to three hours.

I strongly recommend the product.

I would rate it a nine out of ten. 

We deliver a lot of different solutions on various platforms, including different HCI solutions and solutions like Nutanix and Cisco HyperFlex and NetApps, later HCI mile. Most of them have been on Nutanix and on Cisco HyperFlex and as well as VxRack. Our primary use case has of Nutanix has been for virtualization consolidation. We are partners and resellers of Nutanix and I'm a consulting solutions architect.

Nutanix has several feature sets that we like. For example, everything's core centralized on the UI. You don't have multiple interfaces that you have to jump between like in some other solutions. It's more integrated for the overall management of the infrastructure. The other part too which is very attractive, is the fact they provide an option if you're not leveraging your OEM hypervisor like VMware or HyperV. That was a significant cost saver for us as well as enabling us to look at alternatives to the VMware tax. 

For now, I can't think of anything that can be improved. They've been pretty innovative and have provided a fairly comprehensive roadmap. I've worked directly with some of the backend TME guys and they're very responsive and have addressed anything that's come up. However, I would like to see better visibility with the main OEM backup integrators to have a full backup recovery from site to site and from site to cloud and cloud to cloud - the full range. The cloud ecosystem for public/private, site to site visibility with a single backup product.

I've been using this solution for five years. 

From a software perspective, it's incredibly stable and portable. The only caution I would give is that since it is a software-defined solution, be careful of the underlying hardware. It's nothing to do with Nutanix, it's a hardware issue. You may have a highly available, reliable software platform, but it's on commodity hardware so you might experience more failures on the hardware because you decided to go for commodity. You need to be careful how you're architecting your solution and your application factors as you build up your data center, and not sell yourself short and get the cheapest hardware on the market to save costs, because that can turn out to be an expensive decision. 

I haven't seen any issues with scalability. Most people I know for the most part are very sensitive about the fault domains. So they tend to go off from smaller clusters. You do have the ability to go pretty much as far as is humanly possible, it depends how much risk you want to take, but at the same time the scalability is definitely there. Most systems are capped at where you can scale out cluster-wise of VMware, 64 nodes and HyperV at 64. There are two factors to the scalability equation. There's the storage within each node, which is fine and then obviously the scalability as far as CPU and memory go. You can mix and match your platforms on your favorite vendor, but then you need the ability to go beyond 64 where necessary. We do have a couple of accounts that we've worked with where they have some fairly large clusters and I think that's a great option for people needing that level of scalability.

The biggest thing that I've seen has been the backup and recovery which has been challenging for them over the past couple of years. They partnered with Beam and with Rubrik and Cohesity. They had their OEM go-to's, but didn't initially deliver a very good story for application integration for backup and recovery where they had good copy data management. Most of the OEMs are very good at backing up single clusters for local backup and recovery. That said, whenever true disaster recovery was needed and you're leveraging multiple Nutanix missions site to site, there wasn't the visibility of being able to backup or being able to have the application integration.

I would rate this solution an eight out of 10. 

As a systems integrator we use Nutanix on a daily basis since 2013 as our main, strategic and only infrastructure solution for virtualization and it's our related storage component. We can offer most use cases today on Nutanix including VDI, server virtualization, big data and mission critical.

As a system integrator, Nutanix offers a highly standardized solution that can be deployed in a timely fashion compared to legacy three-tier, generation one converged, and most competing hyper-converged solutions. This allows us to move quickly with a small team of architects, and implementation specialists for large projects.

Some years ago when we started working with Nutanix the solution was essentially a stable, user-friendly, hyper-converged solution offering a less future-rich version of what is now called the distributed storage fabric. This is what competing solutions typically offer today and for many customers, it isn't easy to understand the added value (I would argue they should in fact be a requirement) Nutanix offers today in comparison to other approaches.

Over the years Nutanix has added lots of enterprise functionality like deduplication, compression, erasure coding, snapshots, (a)-sync replication and so on. While they are very useful, scale extremely well on Nutanix and offer VM granular configuration (if you don't care about granularity do it cluster wide by default). It is other, maybe less obvious features or I should say design principles which should interest most customers a lot:

Upgradeable with a single click

This was introduced a while ago, I believe around version 4 of the product. At first, it was mainly used to upgrade the Nutanix software (Acropolis OS or AOS) but today we use it for pretty much anything from the hypervisor to the system BIOS, and the disk firmware and also to upgrade sub-components of the Acropolis OS. There is, for example, a standardized system check (around 150 checks) called NCC (Nutanix Cluster Check) which can be upgraded throughout the cluster with a single click independent of AOS. The one-click process also allows you to use a granular hypervisor upgrade such as an ESXi offline bundle (could be a patch release). The Nutanix cluster will then take care of the rolling reboot, vMotion etc. to happen in a fully hyper-converged fashion (e.g. don't reboot multiple nodes at the same time). If you think how this compares to a traditional three-tier architecture (including converged generation 1) you do have a much simpler and well-tested workflow which is what you use by default. And yes it does automatic prechecks and also ensures what you are updating is on the Nutanix compatibility matrix. It is also worth mentioning that upgrading AOS (the complete Nutanix software layer) doesn't require a host reboot since it isn't part of the hypervisor but installed as a VSA (regular VM). It also doesn't require any VMs to migrate away from the node/host during and after the upgrade (I love that fact since bigger clusters tend to have some hiccups when using vMotion and other similar techniques especially if you have 100 VMs on a host) not to mention the network impact.

Linearly scalable

Nutanix has several unique capabilities to ensure linear scalability. The key ingredients are data locality, a fully distributed metadata layer as well as granular data management. The first is important especially when you grow your cluster. It is true that 10G networks offer very low latency but the overhead will count towards every single read IO so you should consider the sum of them (and there are a lot of read IOs you get out of every single Nutanix node!). If you look at what development is currently ongoing in the field of persistent flash storage you will see that the network overhead will only become more important going forward. 

The second key point is the fully distributed metadata database. Every node holds a part of the database (the metadata belonging to its current local data for the most part and replica information from other nodes). All metadata is stored on at least three nodes for redundancy (each node writes to its neighbor nodes in a ring structure, there are no metadata master nodes). No matter how many nodes your cluster holds (or will hold) there is always a defined number of nodes (three or five) involved when a metadata update is performed (a lookup/read is typically local). I like to describe this architecture using Big O notation where in this case you can think of it as O(n) and since there are no master nodes there aren't any bottlenecks at scale. The last key point is the fact that Nutanix acts as an object storage (you work with so-called Vdisks) but the objects are split into small pieces (called extends) and distributed throughout the cluster with one copy residing on the local node and each replica residing on other cluster nodes. If your VM writes three blocks to its virtual disk they will all end up on the local SSD and the replicas (for redundancy) will be spread out in the cluster for fast replication (they can go to three different nodes in the cluster avoiding hot spots). If you move your VM to another node, data locality (for read access) will automatically be built again (of course only for the extends your VM currently uses). You might now think that you don't want to migrate that extends from the previous to the now local node but if you think about the fact that the extent will have to be fetched anyhow then why not save it locally and serve it directly from the local SSD going forward instead of discarding it and reading it over the network every single time. This is possible because the data structure is very granular. If you would have to migrate the whole Vdisk (e.g. VMDK) because this is the way your storage layer saves its underlying data then you simply wouldn't do it (imagine vSphere DRS migrates your VMs around and your cluster would need to constantly migrate the whole VMDK(s)). If you wonder how this all matters when a rebuild (disk failure, node failure) is required then there is good news too! Nutanix immediately starts self-healing (rebuild lost replica extends) whenever a disk or node is lost. During a rebuild, all nodes are potentially used as sources and targets to rebuild the data. Since extends are used (not big objects) data is evenly spread out within the cluster. A bigger cluster will increase the probability of a disk failure but the speed of a rebuild is higher since a bigger cluster has more participating nodes. Furthermore, a rebuild of cold data (on SATA) will happen directly on all remaining SATA drives (doesn't use your SSD tier) within the cluster since Nutanix can directly address all disks (and disk tiers) within the cluster.

Predictable

Thanks to data locality a large portion of your IOs (all reads, can be 70% or more) are served from local disks and therefore only impact the local node. While writes will be replicated for data redundancy they will have second priority over local writes of the destination node(s). This gives you a high degree of predictability and you can plan with a certain amount of VMs per node and you can be confident that this will be reproducible when adding new nodes to the cluster. As I mentioned above, the architecture doesn't read all data constantly over the network and uses metadata master nodes to track where everything is stored. Looking at other hyper-converged architectures you won't get that kind of assurance especially when you scale your infrastructure and the network won't keep up with all read IOs and metadata updates going over the network. With Nutanix a VM can't take over the whole cluster's performance. It will have an influence on other VMs on the local node since they share the local hot tier (SSD) but that's much better compared to today's noisy neighbor and IO blender issues with external storage arrays. If you should have too little local hot storage (SSD) your VMs are allowed to consume remote SSD with secondary priority over the other node's local VMs. This means no more data locality but is better than accessing local SATA instead. Once you move away some VMs or the load on the VM gets smaller you automatically get your data locality back. As described further down Nutanix can tell you exactly how much virtual disk uses local (and possibly remote) data, you get full transparency there as well.

Extremely fast

I think it is known that hyper-converged systems offer very high storage performance. There is not much to add here but to say that it is extremely fast compared to traditional storage arrays. And yes, a full flash Nutanix cluster is as fast (if not faster) than an external full flash storage array with the added benefit that you read from your local SSD and don't have to traverse the network/SAN to get it (that and of course all other hyper-convergence benefits). Performance was the area where Nutanix had the most focus when releasing 4.6 earlier this year. The great flexibility of working with small blocks (extends) rather than the whole object on the storage layer comes at the price of much greater metadata complexity since you need to track all these small entities throughout the cluster. To my understanding, Nutanix invested a great deal of engineering to make their metadata layer extremely efficient to be able to even beat the performance of an object-based implementation. As a partner, we regularly conduct IO tests in our lab and at our customers and it was very impressive to see how all existing customers could benefit from 30-50% better performance by simply applying the latest software (using a one-click upgrade of course).

Intelligent

Since Nutanix has full visibility into every single virtual disk of every single VM it also has lots of ways to optimize how it deals with our data. This is not only the simple random vs sequential way of processing data but it allows to not have one application take over all system performance and let others starve (to name one example). During a support case, we can see all sorts of crazy information (I have a storage background so I can get pretty excited about this) like where exactly your applications consumes their resources (local, remote disks). What block size is used random/sequential, working set size (hot data), and lots more. All with single virtual disk granularity. At some point, they were even thinking of making a tool that would look inside your VM and tell you what files (actually sub-file level) are currently hot because the data is there and just needs to be visualized.

Extensible

If you take a look at the upcoming functionality I wrote about further down you can see just some examples of what is possible due to the very extensible and flexible architecture. Nutanix isn't a typical infrastructure company but is more comparable to how Google, Facebook, and others engineer and build their data centers. Nutanix is a software company following state-of-the-art design patterns and uses modern frameworks. Something I was missing when working with traditional infrastructure. For about a year now they heavily extended what they call the app mobility fabric which comes on top of the distributed storage fabric I mentioned above. This layer allows moving workloads between local hypervisors (currently KVM<->ESXi) and soon between private and public clouds as well. You can for example use KVM-based Acropolis Hypervisor clusters for all your remote offices to get rid of high vSphere licensing costs without losing the main functionality and replicate the VMs to a central vSphere-based cluster. The replicated VMs can then be started on vSphere and Nutanix takes care of the conversion. The hypervisor is a commodity just like your x86 servers.

Visionary

When Nutanix released version 1 of its hyper-converged product in 2011 it was a great idea and a good implementation of the same. Most people in IT didn't however expect that it will become the approach with the highest focus throughout the industry. Today the largest players in IT infrastructure push their hyper-converged products and solutions more than any other and while there are still other less radical approaches (e.g. external all-flash storage), it is foreseeable that they will be less and less important for the big part of IT projects. Nutanix is the leader in the hyper-convergence space but having converged storage within your x86 commodity compute layer is by far not the only thing Nutanix has done since then. Their own included hypervisor is a pretty interesting alternative for all those who don't want to spend lots of dollars on vSphere licenses. While it will not yet suit all of your use cases you might actually be surprised at how much of the functionality vSphere offers today (distributed switch, host profiles, guest customization, HA etc.) you care about is already included out of the box with the added value of greatly reduced complexity (yes I am calling vSphere complex compared to Nutanix Acropolis Hypervisor).

Standardized

Since Nutanix is purchased solely as an appliance solution (even though they are only making the software on top). You are always dealing with a pretested, preconfigured solution stack. You do have a choice when it comes to memory, CPU, disk, and GPU and you get to select from three hardware providers (Nutanix directly, DELL, and Lenovo) but they are all predefined options. This allows to guarantee a high level of stability and fast resolution of support cases. As a Nutanix partner this is worth a lot since the experience we get from one customer is valid for any other customer as well. It also allows us to be very efficient and consistent when implementing or expanding the solution since we can put standardized processes in place to reduce possible issues during implementation to a minimum. Once the Nutanix hardware is rack mounted at the customer their software automatically installs the hypervisor of choice (KVM, Hyper-V or ESXi) and configures are necessary variables (IP addresses, DNS, NTP etc.). This is done by the cluster itself, the nodes stage each other over the local network.

And last but not least: With outstanding support

The support we get from Nutanix is easily the best from all vendors we work with. If you open a case you directly speak to an engineer who can help quickly and efficiently. Our customers sometimes open support cases directly (not through us) and so far the feedback was great. One interesting aspect is the VMware support we receive from Nutanix even if the licenses are not sold by them directly. They analyze all ESXi/vCenter logs we send them. If the bug isn't storage related we also open a case with VMware to continue investigating. They do have the possibility to directly engage with VMware by opening a support case directly (Nutanix->VMware) which we saw on multiple occasions. The last case we witnessed was a non-responsive hosted process (vCenter disconnects) where the first log analysis by Nutanix pointed out a possible issue with the Active Directory Integration Service. We then opened a VMware case which was handled politely but after two weeks when there wasn't much progress other than collecting logs and more logs we remembered what the Nutanix engineer suggested and there was our solution. Disabling Active Directory Integration did the trick. I wouldn't say VMware support isn't good as well but we are always glad that Nutanix takes a look at the logs as well because at the end of the day, you are just happy if you can move on and work on other things, not support cases. 

Note: I strongly encourage you to take a look at the Nutanix Bible (nutanixbible.com) where all mentioned aspects and many more are described in great detail.

Nutanix has the potential to replace most of today's traditional storage solutions. These are classic hybrid SAN arrays (dual and multi-controller), NAS Filers, newer All-Flash Arrays as well as any object, big data etc. use cases.

For capacity, it usually comes down to the price for large amounts of data where Nutanix may offer higher-than-needed storage performance at a price point that isn't very attractive. This has been addressed in the first step using storage-only nodes which are essentially intelligent disk shelves (mainly SATA) with their own virtual SDS appliance preinstalled. Storage nodes are managed directly by the Nutanix cluster (the hypervisor isn't visible and no hypervisor license is necessary). While this is going in the right direction, larger storage nodes are needed to better support "cheap, big storage" use cases. For typical big data use cases today's combined compute and storage nodes (plus optionally storage-only nodes) are already a very good fit! 

The Nutanix File Services (Filer with active directory integration) are a very welcomed addition customers get with a simple software upgrade. Currently, this is available as a tech preview to all Acropolis Hypervisor (AHV) customers and will soon be released to ESXi as well. This is one example of a service running on top of the Nutanix distributed storage fabric, well integrated with the existing management layer (Prism) offering native scale-out capabilities and One-Click upgrade like everything else. The demand from customers for a built-in filer is big, they are looking to not depend on legacy filer technology any longer. We are looking forward to seeing this technology mature and offer more features over the coming months and years.

Another customer need is to be able to consume Nutanix storage from outside the cluster for other, non-Nutanix workloads. These could include bare metal systems as well as non-supported hypervisors (e.g. Xen Server etc.). This functionality (called Volume Groups) is already implemented and available for use by local VMs (e.g. Windows Failover Cluster Quorum) and will soon be qualified for external access (already working from a technical point of view including MPIO multi-pathing with failover). It will be interesting to see if Nutanix will allow active-active access to such iSCSI LUNs (as opposed to the current active-passive implementation) with the upcoming release(s). Imagine if you upgraded your Nutanix cluster (again this would be a simple One-Click software upgrade) and all of sudden you have a multi-controller, active-active (high-end) storage array. (Please note that I am not a Nutanix employee and that these statements describing possible future functionality are to be understood as speculation from my side which might never become officially available.)

We have been using this solution for three to five years.