IBM Spectrum Scale vs Nutanix Unified Storage (NUS) comparison

IBM Spectrum Scale vs. Nutanix Unified Storage (NUS)

Download the complete report

Helped 863,331 peers since 2012

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Categories and Ranking

Pure Storage FlashBlade

Mindshare comparison

As of July 2025, in the Software Defined Storage (SDS) category, the mindshare of Pure Storage FlashBlade is 4.2%, down from 4.5% compared to the previous year. The mindshare of IBM Spectrum Scale is 4.7%, down from 5.2% compared to the previous year. The mindshare of Nutanix Unified Storage (NUS) is 5.3%, up from 2.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Software Defined Storage (SDS)

Featured Reviews

Eric Black

Solutions Architect at Recovery Point Systems

The ability to leverage multi-tenancy along with immutability is a huge benefit for us

The only thing I feel FlashBlade is missing is the SOS API. If it had SOS API, that would put it well over the top. Veeam Backup specifically has started to streamline their API, and they are doing that with SOS API. They have optimized it. Any of the S3 devices out there that support this SOS API can have far more API calls at once. On our side, that translates to better restoration. With SOS API, it can leverage far more restorations at a single given time or read from the device in simple terms. That results in maximizing the output and throughput from the device itself.

Read full review

Bernd Stroehle.

Enterprise Architect at kosakya

Deliver improved performance in data processing and foster extensive AI initiatives

I find IBM Spectrum Scale to be an excellent product known for its fast parallel file system. It achieved the best results when integrated with IBM hardware. Even though it is complex, it provided significant performance advantages in large-scale data management. Its fault tolerance mechanisms and integration capabilities make it popular for extensive AI initiatives and data processing tasks for organizations like Daimler Benz and Bosch.

Read full review

Amarnath Charugundla

System Engineer at Tata Consultancy

Unified management and cost-effectiveness lead to positive experiences and future savings

Improvement is necessary wherein the memory or storage should not breach 90%, because if breached, it becomes unmanageable. We have to set alerts or CPU triggering for 95% for the first warning. Other activities on nodes or file systems should be properly maintained. We must monitor the dashboard for P1, P2 alerts in the Nutanix Unified Storage (NUS) file share system including SMB, NFS, objects, and blocks. Attention should be maintained for any alerts such as CPU, memory, and RAM alerts, as exceeding these creates issues within teams. If triggered to 95% and forgotten, it crosses the SLA breach, causing disturbances to application, web, and platform teams. Continuous monitoring on the Nutanix dashboard is essential. Even a highly experienced person in Nutanix Unified Storage (NUS) cannot provide a 10 rating out of 10 because it is a vast system. I would rate it eight from my perspective.

Read full review

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Pros

"We have seen a reduction in the total cost of ownership by around 20%."

"The solution is able to handle workloads and is easy to use. It allows us to actually manage the boxes in less time."

"What I like best about Pure Storage FlashBlade is its object storage functionality, plus it has fast underlying hardware. Pure Storage FlashBlade is also very stable. I find its stability one of its valuable features."

"We have integrated it with VMware. The integration process is pretty good. Especially with VMware, it helps with the capacity of it."

"It uses the same platform for connectivity so integration is seamless."

"It helps simplify our storage, because the user interface is very simple and the installation is easy."

"The performance of FlashBlade is excellent. It does not necessarily leverage the SOS API that some of the newer products leverage, but I found its speed pretty much on par and comparable. It is fast, and it does what it is supposed to do."

"The most valuable features include the ease of implementation, ease of use and the speed that you can do backup and recovery on."

More Pure Storage FlashBlade pros

"I rate this product ten out of ten."

"It is incredibly scalable and stable."

"I find IBM Spectrum Scale to be an excellent product known for its fast parallel file system."

"Its great servicing high availability. That is what it is used for."

"It is a scalable solution."

"GPFS monitoring is the best feature."

"We use GPFS Scale for parallel file access, the file management, and it's an essential part of our operations."

"The most valuable feature is the ability to share files across different platforms."

More IBM Spectrum Scale pros

"The solution is very easy to manage."

"One of the main features of Nutanix Unified Storage (NUS) that I find most valuable is the flexibility and scalability of it, as well as the ability to perform replication for our Disaster Recovery environment."

"It is a highly scalable solution."

"The most valuable feature is the easy interface."

"From an analytics perspective, the best aspect of Unified Storage is its locality. When you read data, you want to know that you're only reading data from the particular local storage node. It's also critical to access the data as quickly as possible from that. From a business perspective, the most important thing is ease of use. Having a combination of compute and storage makes it much easier to manage."

"What I appreciate most about Nutanix Unified Storage (NUS) is its user-friendly nature."

"Nutanix Unified Storage is a simple, user-friendly, and stable solution."

"The Nutanix block files are the most valuable feature."

More Nutanix Unified Storage (NUS) pros

Cons

"I would also like to see better support for CIFS workloads."

"Its configuration should be easier."

"I would like to have Snapshots and Snapmail in the next release. People who came from a NetApp background, especially expect these features."

"Compared to, for example, Hitachi NAS, the solution is not mature at all. It's just in its infancy as far as technology goes."

"In the realm of micro-services, I think that Pure Storage can do well if they start getting in there and making their arrays more micro-services ready."

"The only thing I feel FlashBlade is missing is the SOS API. If it had SOS API, that would put it well over the top."

"In terms of technical support, the experience has been mixed. The support is done through email and is not that great, making it a very problematic area I've been dealing with for over four years."

"The solution is expensive."

More Pure Storage FlashBlade cons

"The pricing and licensing model for this solution are complex and it is sometimes difficult to explain it to customers."

"The solution's pricing could be better."

"Integration with other vendors is not available."

"The initial setup is complex, especially if trying to avoid erasure coding, as it requires more discs. Avoiding erasure coding can significantly increase costs."

"There can be improvements in fault tolerance and making erasure coding faster."

"Making it a little easier to add bad file sets would help. There is a transition to how you add storage and how you add a file set, so making that a little smoother would probably be my recommendation."

"I wish there were some graphical user interface to access the GPFS file system creation and monitoring."

"I believe there is no graphic user interface, so they should include it."

More IBM Spectrum Scale cons

"The feature request I have is for the consistent improvement of how user account permissions are assigned in Nutanix Unified Storage."

"We have some problems with Nutanix Unified Storage's support because they asked us to change our hardware."

"I haven't had any issues with the solution so far."

"While they are good and they do work, some of the snapshotting and tiering features are not as simple to set up as they could be."

"It's still pretty expensive."

"The CVM consumes more memory and CPU, as it will be allocated a minimum of 32 GB. For a large data store, they are unnecessarily consuming extra resources through the built-in CVM."

"When considering the difference in cost benefits, if you consider it only as a storage solution, you may find it expensive."

"Nutanix Unified Storage (NUS) can be improved involve the limitations I've seen in Files Analytics, specifically to the number of FSVMs today that File Analytics can analyze."

More Nutanix Unified Storage (NUS) cons

Pricing and Cost Advice

"The price could be cheaper."

"The price of this solution could be made more affordable."

"Our licensing is renewed annually."

"I understand that it is competitively priced compared to other brands."

"The product is very expensive."

"I have seen ROI. It has allowed me to increase the density of my VMs without having to purchase anything additional."

"Support is a separate line item. Support is a different cost, but whatever your support is now, that's what you're going to pay forever. If your support's $100 today, six years from now it's $100. It doesn't fluctuate unless you upgrade it, or change it, etc."

"Licensing fees are paid yearly."

More Pure Storage FlashBlade pricing and cost advice

"The solution is costly but reliable."

"The licensing is based on the number of terabytes."

"The licensing model is complex and depends on factors such as the number of processing cores and the amount of storage."

"The licensing currently works based on a software license. If we have files, volumes, and other licenses combined, that would be more valuable. I don't want to go for a separate license for files and a separate license for volumes. We have unified storage, so the licensing should also be unified. That would be helpful."

"Nutanix is priced a bit higher than some of its competitors. A lot of Chinese companies like Huawei are entering the Saudi Arabian market trying to provide similar solutions for a lower price. It offers a good value, especially the support. Nutanix has a highly competent team. The after-sales support is excellent."

"The solution’s pricing could be cheaper."

"Nutanix Unified Storage pricing is reasonable."

"Its pricing is good to okay. It is not super inexpensive, but it is still competitive. Everything could always be lower."

"If we compare the cost of Nutanix Objects Storage to other solutions such as VMware licenses, our current choice is Nutanix Objects Storage. This solution is more cost-effective. However, adding VMware to Nutanix would not be a cost-efficient decision, which is why we do not use it anymore."

"In my opinion, the product is fairly priced."

"The solution's pricing is fair."

More Nutanix Unified Storage (NUS) pricing and cost advice

See which vendors are best for you

Use our free recommendation engine to learn which Software Defined Storage (SDS) solutions are best for your needs.

See recommendations

863,331 professionals have used our research since 2012.

Top Industries

By visitors reading reviews

Computer Software Company

14%

Financial Services Firm

11%

Manufacturing Company

Government

Financial Services Firm

18%

Manufacturing Company

13%

Computer Software Company

12%

Educational Organization

Computer Software Company

33%

Manufacturing Company

Educational Organization

Financial Services Firm

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

Questions from the Community

What do you like most about Pure Storage FlashBlade?

The tool's most valuable feature is its fast performance, especially in handling snapshots. It helps during power out...

What is your experience regarding pricing and costs for Pure Storage FlashBlade?

The pricing of Pure Storage FlashBlade is expensive compared to other products I used from other companies in the pas...

What needs improvement with Pure Storage FlashBlade?

I believe there is not much improvement needed because they have everything we need, but the interface is a little bi...

What do you like most about IBM Spectrum Scale?

It is a scalable solution.

What is your experience regarding pricing and costs for IBM Spectrum Scale?

IBM Spectrum Scale is very expensive with complex pricing models usually based on the amount of storage used or the n...

What needs improvement with IBM Spectrum Scale?

There is room for improvement in the web interface. There could be more information available, such as charts and gra...

What do you like most about Nutanix Unified Storage?

Nutanix has excellent product documentation available on their portals, written in simple, easy-to-understand language.

What is your experience regarding pricing and costs for Nutanix Unified Storage?

From my experience with issues, I have participated in P1 and P2 incidents and learned from them. I can provide solut...

What needs improvement with Nutanix Unified Storage?

While there are good aspects, I would like to see improvements in networking configuration, particularly regarding ov...

Dell PowerScale (Isilon) vs Pure Storage FlashBlade

Comparisons

Compared 19% of the time

Red Hat Ceph Storage vs Pure Storage FlashBlade

Compared 11% of the time

MinIO vs Pure Storage FlashBlade

Compared 10% of the time

Pure Storage FlashArray vs Pure Storage FlashBlade

Compared 9% of the time

Scality RING vs Pure Storage FlashBlade

Compared 2% of the time

More Pure Storage FlashBlade Competitors

Red Hat Ceph Storage vs IBM Spectrum Scale

Compared 25% of the time

DDN IME vs IBM Spectrum Scale

Compared 14% of the time

Portworx Enterprise vs IBM Spectrum Scale

Compared 11% of the time

Red Hat Gluster Storage vs IBM Spectrum Scale

Compared 8% of the time

VMware vSAN vs IBM Spectrum Scale

Compared 7% of the time

More IBM Spectrum Scale Competitors

Red Hat Ceph Storage vs Nutanix Unified Storage (NUS)

Compared 15% of the time

Dell PowerScale (Isilon) vs Nutanix Unified Storage (NUS)

Compared 14% of the time

MinIO vs Nutanix Unified Storage (NUS)

Compared 10% of the time

Microsoft Storage Spaces Direct vs Nutanix Unified Storage (NUS)

Compared 9% of the time

VAST Data vs Nutanix Unified Storage (NUS)

Compared 5% of the time

More Nutanix Unified Storage (NUS) Competitors

Product Reports

Pure Storage FlashBlade

Download Pure Storage FlashBlade product report

IBM Spectrum Scale

Download IBM Spectrum Scale product report

Nutanix Unified Storage (NUS)

Download Nutanix Unified Storage (NUS) product report

Also Known As

No data available

Nutanix Files Storage, Nutanix Volumes Block Storage, Nutanix Objects Storage

Overview

FlashBlade is the industry’s most advanced scale-out storage for unstructured data, powered by a modern, massively parallel architecture to consolidate complex data silos (like backup appliances and data lakes) and accelerate tomorrow’s discoveries and insights.

Pure Storage

IBM Spectrum Scale is a cluster file system that provides concurrent access to a single file system or set of file systems from multiple nodes. The nodes can be SAN attached, network attached, a mixture of SAN attached and network attached, or in a shared nothing cluster configuration. This enables access to this common set of data to support a scale-out solution or to provide a high availability platform. IBM Spectrum Scale has many features beyond common data access including data replication, policy based storage management, and multi-site operations. You can create a cluster of AIX nodes, Linux nodes, Windows server nodes, or a mix of all three. IBM Spectrum Scale can run on virtualized instances providing common data access in environments, leverage logical partitioning, or other hypervisors. Multiple IBM Spectrum Scale clusters can share data within a location or across wide area network (WAN) connections.

IBM

Nutanix Unified Storage provides high availability and seamless cloud platform integration, ensuring robust redundancy, scalability, and streamlined management. It supports hybrid cloud connectivity, enhancing storage security and performance.

Nutanix Unified Storage is designed for effective data protection across block, file, and object storage, offering features like ransomware detection and a centralized management interface through Prism Central. Users gain improved SLAs and IT cost savings through its efficient performance. Despite its user-friendly interface, there is a demand for enhanced security measures such as Multi-Factor Authentication and DLP. While its resilience is notable, users seek improvements in protocol compatibility, storage capabilities, pricing, and support processes.

What are the most important features of Nutanix Unified Storage?

User-Friendly Interface: Simplifies storage management and monitoring.
High Availability: Ensures continuous operation and reliability.
Seamless Cloud Integration: Compatible with platforms like Azure and AWS.
Robust Redundancy: Protects data against hardware failures.
Scalable Architecture: Easily adapts to growing data storage needs.
Ransomware Detection: Enhances data protection measures.

What benefits and ROI might users find in reviews?

Improved SLAs: Increased service reliability and performance.
IT Cost Savings: Reduces expenses through efficient resource use.
Enhanced Security: Stronger data protection and reduced risk.
Centralized Management: Easier control and monitoring from one dashboard.

Industries implement Nutanix Unified Storage for tasks such as file storage, database performance improvement, and storage solution consolidation. Companies deploying virtual machines, securing against ransomware, connecting hybrid clouds, and backing up data find it useful. It supports workloads like Citrix VDI, Kubernetes, and research data, assisting many organizations migrating from legacy storage for better cost efficiency and reduced data center footprints.

Nutanix

Sample Customers

ServiceNow, Mercedes-AMG Petronas Motorsport, Dominos, Man AHL

Information Not Available

JetBlue, International Speedway Corporation, Volkswagen SAIC, Brighton and Hove City Council, Foresters Financial, Janus International Group, Cloud Comrade, Serco

IBM Spectrum Scale vs. Nutanix Unified Storage (NUS)