This is the documentation that I'm referencing below:
- https://docs.aws.amazon.com/redshift/latest/mgmt/amazon-redshift-limits.html
- https://docs.aws.amazon.com/redshift/latest/mgmt/working-with-clusters.html
Document 1 states that the maximum number of DC2 nodes that you can allocate to a cluster is 128. However, it doesn't specify the maximum number of a specific flavour or DC2 type nodes. I'm specifically wondering about dc2.large and it's upper elastic resize limit.
Document 2 states that the dc2.large type node range is 1–32. It also states that the ra3.xlplus type have a node range of 2-16, and that "You can create a cluster with the ra3.xlplus node type that has up to 16 nodes. You can resize it with elastic resize to a maximum of 32 nodes." 32 is twice the stated node range of 16. There is no equivalent remark about dc2.large (nothing to the effect of "You can resize a 32 node dc2.large node up to 64" ).
I'm left with the question: what is the upper limit on the number of dc2.large nodes I can elastically scale in Redshift?
More specifically, can I elastically scale any dc2.large cluster containing anywhere from 17 to 32 nodes, up to a maximum of 64 nodes?