Creating 20K records in CRM 2015 Online using custom workflow? Overcoming Timeout exception after two minutes

Hi All,

We have three Entities A, B & C related as A:C (1:N) & B:C (1:N). Depending on business logic we have a requirement to create records of type C based on combination of both A & B. Assuming A records count = 10 & B records count=20, system has to create C records with combination of A & B which will be 200 in total. Ideally in Production we have to create up to 20K records.

When I do this in CRM Online 2015, I am getting System Timeout exception after two minutes. Any idea to over come this or any idea to break this logic into child instances?