Cloud Migrations

Avoid Cloud Migration Failures: Key Metrics for Transferring 100TB of Data

Xavier
Aug 10, 2024
2 min read

Migrating 100TB of data to the cloud can be a daunting task, and ignoring two critical metrics—latency and bandwidth—can lead to failure.

The Two Key Metrics:

  1. Latency: The delay in data transfer.
  2. Bandwidth: The capacity for data transfer.

Understanding Round Trip Time (RTT)

One crucial metric to consider is the Round Trip Time (RTT), which measures the milliseconds it takes for a packet to travel from the source to the destination and back

Let’s dive deeper into some scenarios

Scenario 1: Sydney to London

Imagine you have a 100 Gbps connection between your on-premises infrastructure in Sydney and the cloud in London, 16,983 km apart. Here, the RTT is 263ms.

To transfer 100TB of data, the minimum transfer time would be:

208 days, 11 hours, and 58 minutes.

That’s a staggering amount of time! Just think about explaining this delay to a customer.

Scenario 2: Sydney to Sydney

Now, let’s consider a scenario where both your on-premises servers and cloud are located in Sydney. With a much shorter distance, the RTT drops to around 10ms.

The minimum transfer time significantly improves to:

7 days, 22 hours, and 15 minutes.

Much better, right?

Conclusion

In conclusion, before planning a migration always keep in mind the amount of data to transfer, your connection’s bandwidth, and the geographical location of your destination.

This will avoid unexpected outcomes and customer frustration due to delays.

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