Dell Avamar is a hardware and software data backup and deduplication product. It provides protection and recovery through a complete software and hardware solution when paired with Dell Data Domain for virtual environments, remote offices, enterprise apps, NAS servers, and desktops/laptops.
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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.
This software is well suited for companies that want to be very in control of their backups but need a simple tool. It could be convenient for them to just buy their own node, locate it in a different location, and set up the jobs for their machines to backup to the cloud with the specific plugins. However, it would not be convenient for companies looking to have a tool that needs to be secure and compliant, and that need to have different other options for business continuity.
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.
Avamar performs data deduplication on the remote host. This greatly reduces the amount of traffic that each backup requires. This even applies to the virtual environment through change block tracking. Backup times are reduced from hours to minutes.
The management interface makes it easy to configure and maintain data retention periods. Many times certain data must be kept for an extended period of time. There is a specific menu for managing retention periods.
The system is able to recover itself from a hard failure with virtually no loss of backups. There is a checkpoint taken each day that provides a recovery point in the event of a catastrophic failure. Since this is a node based system, the loss of more than one node could require a recovery be performed.
While another grid must be purchased, the replication utility allows all backups to be replicated to another grid at a remote location. This ensures the resilience of the backups in the event there is the loss of the primary data center.
Also works on HCI devices performing image-level backups as in our primary data center environment
There is also now an All-in-One appliance for smaller locations
The client interface has constant JAVA issues and can be slow and chunky. We have often had issues with current versions of JAVA breaking it so it will not even run.
The backup clients are split out for function. Although this makes them light, it also makes it cumbersome to upgrade clients. The naming scheme can also be confusing for the clients.
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 have been using the product for over five years. This has performed so well that with the current system reaching its End-of-Life with EMC next year, I have proposed replacing it with the latest version of the product. Now that it integrates with Data Domain, the cost has been greatly reduced. Instead of the need to purchase many nodes, one Data Domain can replace them creating a significant cost savings.
The system overall is easy to monitor and see your backup/restore status. The user interface could use updating as it relies on Java and any updates to Java cause the interface to stop working need to be reinstalled
Support is very convincing, always eager to solve issues from the root rather than workaround, don't hesitate to take webex, describe the issues to the core and recommend configuration to avoid further issues. We can ask few questions other than the main issue. They don't hesitate to answer.
Avamar has simplied the back up approach in their VE edition and is much easier to use than Data Protector. Backing up multiple VMs takes minutes instead of hours now. Creating policies, retentions, and schedules, is vastly improved and much easier.
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.
