What is the success rate to comply Magento 2 split database concept?

Currently, we are trying to do the Magento split database concept to split its catalog, checkout, and order master databases. Magento documentation only speak about the very high level https://devdocs.magento.com/guides/v2.3/config-guide/multi-master/multi-master.html https://devdocs.magento.com/guides/v2.3/config-guide/multi-master/multi-master_manual.html We know that our custom modules and extensions play more roles here. Do we have any technical process to verify whether our existing code…