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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Dell VxRail
Score 7.2 out of 10
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The Dell VxRail is a VMWare-based hyper-converged infrastructure appliance.
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.
As Dell EMC VxRail comes as pre-built, the deployment process is simple and easy. It is possible to scale out easily and will get support from the vendor instantly. As it is a Hyperconverged Infrastructure and it is also the integration of Dell EMC hardware and Vmware, the flexibility that VxRail provides is effective. An organization that is looking for all in one place like data management, network management, Integration, and backup software ecosystem can go for this product.
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.
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.
All of these solutions scored very close together in our testing. Nutanix actually was the highest scoring in ease-of-use, but the integration with Vmware and the pricepoint led us to choose VxRail.