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Dell over de beste deduplicatie-oplossing

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5 Management and maintenance Appliance-based deduplication With purpose-built backup appliances, storage administration expertise is unnecessary because use of virtual storage entities abstracts management tasks such as creating LUNs, configuring RAID groups and mounting volumes. Appliance dictionary databases and all other components are pre-configured, making the appliance immediately ready for operation after a short deployment wizard is completed. Management is simple as well. The internal storage system is equipped with cost-effective, high-capacity hard drives, offering significantly denser target repositories for backup workloads than storage with software-based solutions. When appliances require additional storage, an expansion is quick and typically non-disruptive. Appliances will immediately begin to use the extra capacity without any need to tune LUNs or RAID groups or perform any other storage-related tasks. Software-based deduplication Deployment and management are not as simple for software-based deduplication solutions. CPU, memory and storage must be properly sized for each media server — and because there are more servers, there is more to scope and manage. To ensure adequate performance, fast and expensive solid state disk drives dedicated to the deduplication database must be properly sized and configured into LUNS, RAID groups and so on, following vendor or company best practices or configuration guidelines — which typically requires assistance from a storage specialist. Over time, deduplicated data will continue to grow. When maximum storage capacities are reached, a storage specialist will be required again to reconfigure disks and RAID groups and perform other storage-related tasks. Tolerance Software-based deduplication Software-based deduplication solutions piggyback the backup environment's media servers, which typically run well-known, full-blown operating systems. These operating systems are easy targets for viruses, worms and other malware — so components such as the deduplication database are likely to experience unexpected hiccups and even outages, putting the organization at risk of data loss. And when corruption occurs, restoring the deduplication database is time-consuming. Appliance-based deduplication An appliance-based deduplication database is significantly less susceptible to corruption because its components run within a controlled, locked down operating environment. Every driver, service and component is well understood, and they are designed to work closely together as a complete solution, making it significantly more difficult for outside influences to cause corruption and also making the database significantly easier to recover. Rehydration Software-based deduplication In disk-to-disk-to-tape (D2D2T) backup environments, backups that are deduplicated and compressed on a disk are rehydrated to their native format and preserved on tape for longer term retention. Rehydration is a very long and resource-intensive task because unique deduplicated chunks of data are stitched back together to form the original backup. Because of this, backup software- based duplication solutions can be difficult to size for. While processing deduplication for backups, the media server will also be processing the rehydration of data, which can typically run 24x7. When aggressive recovery time objectives are required, beefing up the media server resources to meet these time windows can be quite costly. An appliance-based deduplication database is significantly less susceptible to corruption because its components run within a controlled, locked down operating environment.

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