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Hello everyone!
I have 2 datacenters DC1(3 nodes) and DC2(one node) and I want to convert datacenter 2 in a stand alone, it's been used as a DR, so it would keep the data and use it separately from dc1 during a test, and after I finish it re-joint DC2 to DC1 as it was at the beginning. Is it possible?
Thank you.
@igor.rmarinho_185445 I'll respond to your first question. Since it's unrelated, please do a separate post for this question. Cheers!
If I have DC1 (3 nodes) using LOCAL_QUORUM should I use LOCAL_QUORUM in my DC2 that has only one node? Or Should I use LOCAL_ONE ?
@igor.rmarinho_185445 The quick answer is no, it is not possible to make a DC that is part of a cluster a standalone cluster of its own. You will need to go through a decommission process to achieve that otherwise the nodes remaining in the cluster will be storing hints for the DC and put pressure on your existing cluster.
Administrators with a lot of expertise in Cassandra would be able to workaround it but there is a lot of room for human error and it is not advisable. We recommend you build a separate cluster specifically for testing purposes and populate it with data from your cluster snapshots. Cheers!
Thanks Erick, I saw this post on DataStax, but I was hopping to do it in a easier way, but the token range thing block it the usually create structure and restore data from snapshot.
If your DC2 only has one node, you can simply copy the snapshots from that one node to the new node using the "refresh method". Cheers!
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