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Dell PowerScale (Isilon) vs VAST Data comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Nov 4, 2024

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

Dell PowerScale (Isilon)
Ranking in File and Object Storage
3rd
Average Rating
8.8
Reviews Sentiment
7.5
Number of Reviews
55
Ranking in other categories
NAS (1st)
VAST Data
Ranking in File and Object Storage
9th
Average Rating
10.0
Reviews Sentiment
7.5
Number of Reviews
2
Ranking in other categories
All-Flash Storage (20th), NVMe All-Flash Storage Arrays (8th)
 

Mindshare comparison

As of March 2025, in the File and Object Storage category, the mindshare of Dell PowerScale (Isilon) is 8.8%, up from 8.1% compared to the previous year. The mindshare of VAST Data is 4.2%, up from 2.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
File and Object Storage
 

Featured Reviews

Eric Burgueño - PeerSpot reviewer
Simplified data management, tremendously reducing our users’ cognitive overhead
The only thing that I think PowerScale could do better is improving the HTTP data access protocol. At the present, you cannot protect access to data via HTTP or HTTPS the same way that you can secure data access through other protocols like NFS or SMB. You can either access a file because it can be access by anyone in the organization, or you cannot at all. There is no in-between. HTTP is not considered a first-class data access protocol, so the Unified Permission Model that would allow a user to authenticate before being able to access a private file, does not apply. However, with the recent introduction of S3 starting from OneFS 9, I believe the necessary plumbing is already there for HTTPS to also be elevated to a first-class protocol in the future because both protocols sit behind a web server under the hood. It does not sound like it would be too complicated to implement, but it would be a valuable feature and it is currently missing.
Alan Powers - PeerSpot reviewer
Stability-wise, a device that has been up and running for years
The failover capability and resiliency are some of the solution's valuable features. The big thing is resilience because it has richer coding in it, so multiple devices can't fail. Also, one can still access a number of CBoxes that can allow one to access their file system. Once a device fails, it fails the transparency of the end-user, and it just starts using another resource. The encryption capability, the snapshots, along with a whole bunch of features make the tool valuable. VAST Data keeps adding more and more features all the time.

Quotes from Members

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

Pros

"Dell PowerScale is a scalable solution. It allows non-disruptive upgrades and maintenance of the system."
"The most valuable features of the solution are flexibility and ease of implementation."
"The flexibility and the user-friendly interface are the most valuable features."
"It has allowed us to have more consistent quality controls. It has also allowed us to expand the number of servers in clients processing and accessing data, allowing us to get a lot bigger projects out the door."
"The solution has simplified management by consolidating our workloads. Rather than managing all the different workloads on different storage arrays, Windows Servers, etc., we just have one place per data centre where we manage all their unstructured data, saving us time."
"The tool's most valuable features are high density and scalability."
"The recent introduction of inline deduplication and compression has drastically improved our efficiency ratios to make it an economical product. This solution has also had a positive impact on our employees' productivity because it reduces the amount of admin that our staff needs to handle."
"The solution's scalability is very good."
"The solution is useful for machine learning and scientific applications, including computer simulations."
"This has been one of the most reliable storage systems that I have ever used."
 

Cons

"The analytics could be improved."
"The price of the solution could be reduced."
"The legacy file system for Epsilon didn't scale into the cloud and didn't have a separate OS. It would be key if this was made possible."
"It would be nice to see tools like Superna Eyeglass built into PowerScale."
"There is room for improvement in its handling of object storage."
"Additional metadata reporting would be great. We have to use a separate tool to report on that. We would like to view the age of data and how long it has been since someone has accessed a file."
"It would be good to have synchronized mirroring between two clusters without using a third-party program."
"Dell's customer service needs improvement."
"The write performance could be improved because it is less than half of the read performance."
"The read/write ratio is an area in the solution with some flaws and needs improvement."
 

Pricing and Cost Advice

"Dealing with the product costs and licensing areas is getting easier since Dell is simplifying the licensing process and licensing packages offered to users."
"It is an expensive product with a high storage capacity suitable for large data requirements."
"Pricing for this solution is reasonable."
"This solution is priced slightly higher than others on the market but does offer good quality. With this solution's data reduction and compression, we were able to purchase less. Costs have dropped because of the data rate of compression and deduplication."
"It's a high-cost offering amounting to three or four million Swedish kronor, or about $400,000 or euros, for approximately 480 terabytes of storage."
"Dell PowerScale (Isilon) is an expensive solution."
"We use the TNA approach which is a great opportunity for us to better manage the licenses based on how much consumption is available for the different customers so we can use that approach and scalability."
"The solution is expensive; it is not the cheapest solution out there. If you look at it from a total cost of ownership perspective, then it is a very compelling solution. However, if you're looking at just dollar per terabyte and not looking at the big picture, then you could be distracted by the price. It is not an amazing price, but it's pretty good. It is also very good when you consider the total cost of ownership and ease of management."
"We acquired VAST Data as a one-time, capital purchase."
"Price-wise, VAST Data is not the cheapest, not the most expensive one."
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Top Industries

By visitors reading reviews
Educational Organization
23%
Computer Software Company
11%
Manufacturing Company
9%
Financial Services Firm
8%
Computer Software Company
16%
Manufacturing Company
14%
Financial Services Firm
12%
University
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

Questions from the Community

What do you like most about Dell EMC PowerScale (Isilon)?
The solution provides massive performance, scalability, efficiency, and ease of management.
What is your experience regarding pricing and costs for Dell EMC PowerScale (Isilon)?
Every time we purchase a PowerScale solution, we buy four nodes for one data center and four for another, with five years of maintenance covered by Dell. It's a high-cost offering amounting to thre...
What needs improvement with Dell EMC PowerScale (Isilon)?
Dell's customer service needs improvement. Specifically, hardware failures under warranty should be addressed within the promised timeline. I face difficulty in tracing and finding the right suppor...
What do you like most about VAST Data?
The solution is useful for machine learning and scientific applications, including computer simulations.
What is your experience regarding pricing and costs for VAST Data?
Price-wise, VAST Data is not the cheapest, not the most expensive one.
What needs improvement with VAST Data?
The read/write ratio is an area in the solution with some flaws and needs improvement.
 

Also Known As

PowerScale, Dell EMC Isilon
No data available
 

Overview

 

Sample Customers

OMRF, University of Utah, Translational Genetics Research Institute, Arcis, Geofizyka Torumn, Cyprus E&P Corporation, Colburn School, Columbia Sportswear, Harvard Medical School, University of Michigan, National Library of France,
Norwest Venture Partners, General Dynamics Information Technology, Ginkgo Bioworks
Find out what your peers are saying about Dell PowerScale (Isilon) vs. VAST Data and other solutions. Updated: March 2025.
842,388 professionals have used our research since 2012.