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Remote Procedure Call – What is RPC?

Known as Remote Procedure Call RPCallows computers on a network to make program requests between each other without knowing the network details. “Remote Procedure CallThis service, known as ”, was originally designed for a successful communication between the server and the clients.

If any program in the system needs to communicate with the client, it can communicate using the RPC protocol. For example, mail services use RPC heavily. The system that wants to receive and send mail can connect to the mail server with POP3 and receive mail, and can also send mail via SMTP if desired. While this communication is provided with SMTP and POP3, it can also be provided with the RPC protocol.

How RPC Works

The RPC protocol handles communication between clients and servers by converting the incoming call from the client machine to a request. The working logic of the protocol is exactly as expressed in the image below.

An application on the client system makes a call via RPC and RPC protocol It transforms this call into a request, passes it through layers, and forwards it to the server, and then transmits the response it receives back to the client machine, according to the server's response.

In systems, more than one RPC can occur at the same time, that is, the process you see in the image can be done simultaneously by several different programs.

What is the Difference Between RPC and RMI?

RMI, known as Remote Method Invocation, is essentially an API for implementing RPC in Java. RMI allows remote invocation of Java methods on the system. The difference from RPC is that it can only call Java methods. Also, RMI runs slower than RPC. RMI, also known as Remote Method Invocation, is used to run an object's methods over the network. The main differences between RPC and RMI are:

  • RMI is object oriented and allows method sharing over the network.
  • RPC is based on C and is a system-wide protocol.
  • RMI is slower than RPC

Working as an API that implements RPC in Java, RMI's main difference from RPC is that it provides communication between Java programs. RPC On the other hand, it is not language-based but is a system-wide communication protocol and allows computers on the network to make requests between each other.


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