COD now allows you to vertically scale up the COD clusters from a Light Duty to a Medium Duty instance type. You can upgrade the instance type of a COD cluster that belongs to a Master or Gateway node.
To know more about the vertical scaling, see Vertical scaling COD clusters.
This is available starting in COD v1.30 and you do not need to upgrade to a higher version of COD to benefit from this feature.
Try out CDP Operational Database for free with Test Drive (no cloud account or setup is needed).