Dell PowerScale vs. Nasuni vs. PowerProtect DD Series

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.

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Well suited if you have a lot of data that doesn't need to be stored and read right away. I think even if you don't have much data, you can still use it for it's intended purpose to great effect, but think of it as the more data you have, the even better it will work. I don't think it would be particularly useful if you already have a slick file restore system in place and you don't need to store your data elsewhere with redundancy.

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We have huge data coming in from different sources and also from multiple organizations in our Data centres. This data had multiple copies of the same data and was huge in size therefore, we wanted to have a solution in place which can help us with a good amount of deduplication at the deepest possible level to make sure that our ecosystem does not have multiple copies of the same data and is also efficient at the same time. Having said this, we wanted this solution to be secure and reliable since it had to be exposed to a huge critical set of data in the market. To add, backup and restoration was something that we were also keen on evaluating so that once we have efficient data within our system, the time it takes to backup and restoration also reduces. And all this was justified by this solution when we signed up with them. From the pricing perspective and the implementation side, the solution needs improvement to make it more efficient and user-friendly.

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• NAS Storage
• Capacity and Performance details of the array
• Alert and Operations details

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• The management console is extremely simple and easy to navigate, making common tasks easy to do.
• Our storage appliance is configured to snapshot data several times an hour, making the risk of data loss very low.
• Data restores are very intuitive, and take seconds to initiate regardless of whether it is one file or 300GB of data. We have successfully restored many Gigs of data in minutes.

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• It writes backups quickly. DDBoost add-on is very useful as well for improving backup speeds.
• DD is very efficient in its use of capacity. It dedupes and compresses very well.
• It spans to large capacity amounts.

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• 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.

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• Better analytics when issues arise.
• Better onboarding documentation.
• Real-time monitoring.

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• It can be expensive to implement, especially when used in conjunction with other applications/hardware such as Avamar.
• The TCO can be high, especially when it needs its storage expanded.
• Recovery speeds can be slow (compared to other solutions) for when recovery is time sensitive.

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DD has performed flawlessly for almost 10 years as our backup/recovery storage with offsite replication. Given its track record and great support from EMC, we're unlikely to look elsewhere any time soon.

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As I mentioned, the user interface is amazing and straight forward. It's very easy to learn how to configure and restore files. I would like a bit more reporting, especially in terms of live reporting and monitoring. The support is great when you have a question on how to do something, which helps with usability.

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Again, it may have a little to do with the size and speed of your own environment, but we've been nothing but pleased with the speed of access of the files - even pulling old files from the cloud storage. Recovery of huge and many data files is a bit slow if you don't have the specs of the filer up to snuff.

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Customer support has had some ups and downs here. We've had several issues with EMC support before and during the acquisition by Dell, but in the last 18 months support has been top notch. Quick and knowledgeable help is but a chat away, or they will call you back so you don't have to wait on hold. The team supporting us is responsive and is quick to assist with any request or issue.

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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.

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The technical support and escalation path for Nasuni is much more reliable and efficient. No getting transferred to various teams. Often times, the person who answers your call is able to resolve your issue. If they cannot, they get the case assigned to the appropriate engineer right away. Time to close has always been very good.

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We selected Data Domain due to its integration with our backup software. The Data Domain works well for what we need it to do.

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• Isilon provides very high value for money
• Matches the performance and storage requirements of the arrays
• EMC provides very skillful and high response team in case of any issues in isilon

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• Dramatically reduced time spent managing our storage platform. Quotas and reporting tools take all the guesswork out of data growth. Updates are easy to deploy. Time freed up can be used for more user-facing activities that we consider more valuable to the organization.
• The overall stability of the platform has been very good. We have been running on the same hardware for the past four years without any performance issues.

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• We were able to immediately discontinue our remote tape storage and TBU maintenance.
• Reduced backup footprint in the data center.
• It is costly to expand so buy it with a purpose.

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