From the way you wrote this, I suspect the name DC may have different meaning here. Are you talking about the physical location (i.e server rooms), or the Cassandra DC (i.e. group of nodes for replication purposes)?

On 05/11/2024 11:01, edi mari wrote:
Hello,
We have a Cassandra cluster deployed across three different data centers, with each data center (DC1, DC2, and DC3) hosting 50 Cassandra nodes.

We are currently saving one replica in each data center.
We plan to migrate DC3, including storage and servers, to a new data center.

1. What would be the best method to perform this migration, which could take several days (2–5 days)? 2. Would relying on hints in the other two data centers be a good approach?

Thanks
Edi

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