You can now associate multiple on-premise machines to a single logical gateway. The benefits are:
Higher availabilityof Data Management Gateway (DMG) – DMG will no longer be the single point of failure in your Big Data solution or cloud data integration withAzure Data Factory, ensuring continuity with up to 4 nodes.
Improved performanceand throughputduring data movement between on-premises and cloud data stores. Get more information onperformance comparisons.
BothScale outandScale upsupport – Not only the DMG can be installed across 4 nodes (scale out), but you can now increase/decrease the concurrent data movement jobs at each node (scale up/down) as per the need. Note:The Scale up/down feature is now available for all existing Single Node (GA) gateways. This update is not limited to this preview.
RicherData Management GatewayMonitoring experience– You can monitor each node status and resource utilization all at one place on the Azure Portal. This helps simplify the DMG management.