WAN Acceleration

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    WAN acceleration is a Veeam technology that optimizes data transfer to remote locations. It is specific for offsite backup copy jobs and replication jobs.

    Offsite backup copy and replication always involve moving large volumes of data between remote sites. The most common problems that backup administrators encounter during offsite backup and replication are insufficient network bandwidth to support VM data traffic and transmission of redundant data. To solve these problems, Veeam Backup & Replication offers the WAN acceleration technology that combines:

    • Network traffic compression
    • Multistreaming upload
    • Global data deduplication
    • Variable block size deduplication.

    These technologies help optimize the data transfer and reduce the amount of data going over WAN.


    WAN acceleration is included in the Veeam Universal License. When using a legacy socket-based license, the Enterprise or Enterprise Plus editions of Veeam Backup & Replication are required.

    High Bandwidth Mode

    Starting with Veeam Backup & Replication 10, Veeam WAN acceleration introduces the High bandwidth mode. We recommend to use it for WAN connections faster than 100 Mbps. If compared with the Low bandwidth mode, it does not leverage the global cache, but utilizes a faster compression method, optimized digests processing and an alternative deduplication mechanism. As a result, the new mode provides better performance and higher speed of data transfer.

    Mind that to use the High bandwidth mode, you must enable this option for WAN accelerators at both sites of the data transfer: the source and the target. If the target WAN accelerator has the High bandwidth mode enabled, different source accelerators can parallelly interact with it in different modes, depending on the mode selected for each source WAN accelerator.

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