EVault delivers disk-to-disk backup technology and state-of-the-art managed services that automate enterprise data protection processes. EVault's DeltaPro™ and patent-pending Adaptive Compression and Expedient Delta-File technologies make it easy to secure, protect and recover critical data across a broad range of operating systems and applications, delivering a high performing online backup and recovery solution.
Accelerate Online Backup and Recovery
When EVault is deployed in conjunction with Silver Peak, enterprises get the following benefits:
Silver Peak’s Network Memory recognizes repetitive information and sends a reference to deliver the information locally, a concept known as data reduction. This avoids WAN performance issues that can hamper the performance of backup and recovery.
Network Memory can reduce over 95% of WAN traffic by eliminating the transfer of duplicate information. Network memory fingerprints at the individual byte level, enabling Silver Peak to detect and eliminate repetitive patterns even when the backup/ replication solution is performing similar functions at the block level, as is the case with EVault.
In addition, Silver Peak leverages advanced compression techniques to further reduce the amount of WAN bandwidth required for backup and restore. These techniques work in both directions of a WAN link, improving the backup/ restore process while ensuring that the WAN can efficiently handle a restore if needed. By providing compression and encryption within the acceleration appliance, this functionality can be offloaded from the EVault Director server, ensuring better scalability and performance. In addition, significant performance improvement can be provided even when non-repetitive information is sent across the WAN.
EVault leverages the Transport Control Protocol (TCP) for transport. As a result, it is subject to the latency issues that often accompany this protocol. Silver Peak helps to overcome these issues by leveraging a variety of TCP acceleration techniques, including selective acknowledgements, high speed TCP, and increased TCP window sizes.
Silver Peak reduces the impact of both packet loss and jitter that occurs when router links are oversubscribed. This is handled via adaptive Forward Error Correction (FEC), a technology that is used to reconstitute lost packets at the far end of a WAN link, avoiding delays that come with multiple-round-trip retransmissions. The Silver Peak solution dynamically adjusts the FEC overhead in response to changing link conditions for maximum effectiveness in environments with high packet loss.
Application level QoS can be used to ensure that replication services receive higher priority than other traffic, and that the appropriate bandwidth is always available for data management applications. This is particularly useful when the secondary server is not located in a dedicated disaster recovery site and a variety of business applications are vying for the same shared WAN bandwidth.
Silver Peak performance improvements in EVault environments are dependent upon the type of EVault configuration that is deployed and how end users chose to implement compression and encryption. On average, Silver Peak provides 10-20x (90-95%) aggregate performance improvements in most EVault environments.
