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Estimating Downtime for Bulk User Migration to FusionAuth

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  • W
    wesley
    last edited by 19 Feb 2025, 21:32

    I am evaluating different migration strategies (big bang, segment-by-segment, and slow migration) and am initially considering the big bang approach. Since this method involves downtime for users, I need an estimate of how long the migration process might take.

    Specifically, how long would it take to import approximately 5 million users into FusionAuth? This will help me assess the expected downtime duration.

    W 1 Reply Last reply 19 Feb 2025, 21:33 Reply Quote 0
    • W
      wesley @wesley
      last edited by 19 Feb 2025, 21:33

      Based on observed import speeds, 100,000 users take approximately 1-2 minutes to import.

      Using this estimate, importing 5 million users could take about 50 to 100 minutes, depending on system performance, database speed, and network conditions.

      If you are importing into FusionAuth Cloud, follow the steps here to add your importing system’s IP address to our allow list.

      To assist with the migration process, FusionAuth provides import scripts:

      • FusionAuth Import Scripts
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      • W wesley has marked this topic as solved on 19 Feb 2025, 21:34
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