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Re: Data node deletion in NDB
Posted by: Mauritz Sundell
Date: December 07, 2021 06:00PM

Hi Tayyab

No, you must drop table test1.test1 do be able to free the data nodes 3 and 4.
This will drop all data for table also on node 1 and 2.

Common ways to downscale a cluster are:

1) backup, reconfigure a smaller cluster, restore
Cluster will be down during this process, but is often the quickest way.

2) To avoid down time one can create a new cluster in parallel with old cluster, and bring new cluster up to date using MySQL replication, and then switch over application to new cluster and bring down old cluster.

Regards,
Mauritz

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