Cohesity is a leader in AI-powered data security and management. Cohesity protects the world’s most critical data workloads across on-prem, cloud-native, and SaaS with backup and recovery, threat intelligence, cyber vaulting, files and objects, and recovery orchestration.
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Dell PowerScale
Score 9.8 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.
Cohesity has been awesome. The performance (speed) that it has been able to provide has actually given me back time every month. I have to test my backups monthly, and the Cloning process that Cohesity has available from it's backup has given me days back each month. It just a few minutes I can have VMs restored for testing and documentation. This took a couple days with the previous vendor.
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.
Reporting could always be better- executive-style reports have to be generated from data at multiple points.
Some tasks that could be brought to the UI that today we have to call support on (for example when an NFS mount is still active but we cannot see it from the UI)
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.
We have been very pleased with this backup solution. It is fast and reliable, and supports our VMware infrastructure. The company's support has been great, including proactively replacing our nodes when the flash memory was reporting high wear. Support is offered on-shore as well. We plan on continuing to use this product for the foreseeable future.
Cohesity Helios is very easy to use and the web up is simple to navigate and the main dashboard presents a very good and clear overview summary of protection status, capacity and other vital metrics. If you have multiple clusters you can get a single pane view of overall status which is awesome.
Support is quick to respond but lacks that ongoing responsiveness if the issue is not simple. There will be large gaps in replies if they need to resort to escalation and when there are timezone differences between yourself and the person who picked up the ticket.
We looked at Veeam and although it's a great product when we priced out the licensing of both primary and disaster datacenters it became much too expensive. Rubrik is a great product and very similar to Cohesity. In the end, Cohesity had a secondary storage play as well as a better UI and better compatibility with lower tier cloud storage. We also like the way Cohesity did protection jobs vs Rubrik's virtual machine centric backup. CommVault is a product we still use today due to its massive features and the ability for bare metal backups. Cohesity does a much better job in the area of UI simplicity, virtual backup ease, and ease of management.
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.
Overall Cohesity professional services like the rest of Cohesity are brilliant. We had some poor advice around how to carve up our Netapp protection jobs which has set us back but it has been acknowledged that a mistake was made by Cohesity and they promise for future engagements with new customers the lessons learnt with us will be integrated into their planning workshop for NAS onboarding.
Several hours a week of admin time no longer needed to deal with tapes.
Many hours a year saved in that the admin no longer has to deal with LTO drives, LTO drive firmware, tape libraries, tape library firmware, a physical server connected to tape library, etc. Retired old legacy NAS devices that in some instances no longer had firmware updates. One system to administer and maintain.
Piece of mind. We replicate from our onsite cluster to an offsite cluster in the event of a DR event at HQ.
