Since it's acquisition in 2011 Compellent became a Dell product line of storage solutions (e.g. Dell Compellent Storage Center). Compellent products became part of the Dell EMC SC Series of enterprise flash and SAN storage devices and are now EOL.
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Dell PowerScale
Score 10.0 out of 10
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Dell Technologies presents Dell PowerScale (replacing EMC Isilon) as a scale-out NAS solution and server technology that provides the flexibility of a software-defined architecture with accelerated hardware innovations to harness the value of data.
Isilon Systems was acquired by EMC in 2010; some EMC Isilon NAS appliances are still available and supported under the PowerScale brand.
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HPE Nimble Storage
Score 8.3 out of 10
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Nimble Storage was acquired by HPE in 2017. The enterprise flash array product line now goes by the name HPE Nimble Storage.
All of the storage vendors we tested in a shoot-out performed pretty well, though I don't have the raw numbers. What sold us on Nimble is the service and support, which the others cannot touch.
With the offerings available at the time in a similar price range, we perceived Nimble to offer better performance, better UI resulting in ease of configuration and ongoing access to information about the array and a minimal rack space requirement. Those were the differences we …
All in all this series great in addressing issues applications that need flash storage as a backend storage supply. It addresses the need for fast, responsive servers that need to boot quickly. It is easy to use and for the most part there are few issues and none that can't be addressed/fixed quickly.
EMC Isilon Scale-Out NAS is well suited for larger files (greater the 128 Kb) and where you need to have everything in one common name space. Where it is less appropriate is for many small files (millions of files less than 128 Kb in size) - this causes the protection level to becoming mirroring, which will cost more space.
HPE Nimble Hybrid storage is very cost effective that can provide the same Latency, I/O and Bandwidth compared with any other All FLASH storage which is 3 times expensive than this. From a feature comparison standpoint of view, there isn't much difference between Hybrid Vs ALL Flash. HPE Nimble Storage uses ALL Flash disk at the front end to process the data thus by reducing the cost by using a regular SAS disk at the back end. Its the software and the algorithm that HPE Nimble StorageE uses to achieve this. having said that, the overall data reduction, de-duplication and compression is above the mark as what the sales team promised initially. Overall, the storage is performing well without any challenges.
Dell Compellent support (Co-Pilot) and the add-on service (Optimize) are critical services that Dell Compellent does very well. Alerts from the array are sent to Co-Pilot where tickets are automatically generated and customers are notified of events. Of greater importance at times is the proactive support Co-Pilot and Optimize provide by contacting us of inefficiencies in the array and consulting on resolutions.
Enterprise Manager (Dell's "single pane of glass" management framework) is a useful tool for configuration/evaluation of the array and other Compellent products.
Ease of management. From firmware upgrades to managing server volumes the process is much simpler than with other arrays.
HP Nimble is basically an all in one SAN with SSD cache or in some cases fully SSD based however the thing it does the best is its front end GUI and user management capability making it easy for anyone to ramp up on managing it quickly.
The Nimble SAN is also very easily managed when it comes to hardware management. Outside of some major internal parts such as the mainboard, almost everything in the system is duplicated so single failures never bring the system down. Power supplies and drives are easily swapped out.
Nimble has incredibly capable and easily accessible support that is available 24/7.
The price point on Nimble, though higher than piecing together a home made SAN out of spare Windows Servers, is perfect even for some SMB's.
The GUI could be a little more updated with a lot more information regarding usage.
There could be some assistance with high I/O times where snapshots go to consolidate. There seems to be issues when that attempts to occur, and there will times where the virtual machine stuns due to the I/O intensity.
Modification of multiple volumes or the creation of multiple volumes is a pain in the DSM management console.
Some upgrades require the entire cluster to be rebooted simultaneously. In this day and age, that should not be necessary. This is my biggest disappointment with Isilon to date.
When using multiple storage pools you have to be very careful with your capacity management. Filling up one pool can cause an overflow of data to a pool that is less performance driven. Do not underestimate your capacities or you will find yourself in a tight spot.
Block size is almost always an issue with Isilon. It does not handle all types of data well. In many cases PACS and VNA data is best to be stored on a different storage platform that will utilize the capacity more efficiently that Isilon is capable of.
Deduplication seems to be less efficient on Isilon than on other platforms for similar types of data.
I'd like the GUI to include more information for some of the features such as replication data totals each night. You have to go to the command line for this.
It would be nice to have a feature built into the GUI that would show you the command line equivalent to get the same results you are seeing in the GUI.
Although the intial setup was easy, they could always improve on that portion. During my setup, I did have to do a lot of back and forth with research on their site as to what each setting was that I was setting up. They could have provided some sort of description for each field within the setup that would have made it easier to know what they were having us set up.
Nimble is doing its job well and any issues that do come up cause the Nimble support team to alert us before we would potentially see an impact to our production environment. I do wish we could expand into the unused space in the CS210 shelf which is limited by what I assume is a marketing/sales strategy, but we will likely add shelves moving forward.
Almost perfect, some hoops to jump through after major upgrade, but overall simple and effective. Our storage administrator really likes the integration with vmware as it makes his life easier. Also it was no trouble integrating it with our active directory credentials. The only issue we had was getting the plugin in VMWare going initially.
This is not solely based on the support engineers themselves but more so that the logging and gotcha's that their array has. There have been multiple times where logs are pulled, but the folder is not large enough, and it crashes the array. Other times there are certain aspects that support either does not know of or isn't knowledgable about how to look at particular issues that could be causing problems.
Any time I have had to contact support, they have always been quick to respond, and very efficient in resolving any issues. When an action has been required on our side for a fix, they have been very helpful in explaining step by step what was required, and when replacement parts have been needed, we've had them within 24 hours.
We selected Compellent solely based on price. Honestly I would rate it only slightly better than a QNAP we used (which was even cheaper). If performance and reliability are factors in your decision (and they should be) I would recommend looking at something like a VNXe.
Raw disk space vs. logical disk space ratio was significantly better on the Isilon. Fast cache using SSD drives for faster searching is available on the Isilon but not available on the Overland solution. Isilon solution included faster backend switching between nodes.
We used a Dell EqualLogic PS Series storage array for many years and it worked well. A big issue was that upgrading firmware required system downtime and during one upgrade I was unable to bring the systems back up afterwards. I spent several days on the phone over a holiday weekend with Dell and VMware support in order to get my systems back up and running. It made me very nervous about doing firmware upgrades after that.
