Starting with OCS-3.11.4, the current max limit on the number of PV's in a 3 nodes cluster changes from 1000 to 2000. Although this is not the default limit, default limit still exist at 1000 but the users can tune their cluster using this article and go beyond 1000(up to 2000).
Follow the steps below to bump the limit to 2000
Tuning the nodes
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