Discrepancy in Interface Numbers Among Different RPCTypes of Microservices

[dufanrong]

I am currently studying your paper, where you mentioned that "Stateful services often provide a small number of uniform query interfaces such as reading or writing data, while stateless services tend to provide tens to hundreds of evolving interfaces for different purposes."

I would like to inquire further about the reasons behind this observation. In my analysis of the dataset, I have noticed significant discrepancies in the number of interfaces among microservices of different rpctypes:

• Microservices of HTTP type often exhibit a large number of interfaces, sometimes numbering in the hundreds of thousands.
• Microservices of MC type typically have several thousand different interfaces.
• Microservices of RPC/DB.MQ type, however, tend to have a much smaller number, often only a few dozen.

Could you please provide more insights into the underlying reasons for this phenomenon? Understanding the factors influencing interface diversity among different rpctypes would greatly enhance my comprehension of your research findings.

Thank you very much for your time and consideration.