What is the difference between hot deployment and hot loading?

What is hot deployment and hot loading ？

What is hot deployment ？

     Full name of hot deployment Hot deploy, Mainly for containers or applications , If new resources are added or part of the source code is updated , Reload or deploy without restarting .

What is hot loading ？

     Full name of hot loading Hot Swap, Mainly for the byte code generated by the compiled source code , After recompilation , No need to shut down , Directly reload the new bytecode of the updated file into memory .

Personal understanding ： Hot deployment and hot update are mainly to solve the poor experience and efficiency caused by frequent restart of services . Hot deployment can be done from 0-1, Or from 1-1, such as Buy instant noodles and soak them in boiling water at home , Or boil soup with pork ribs . Hot loading is very limited , Just like your limited conditions on the high-speed rail , Only add boiling water to boil dry .

Comparison between hot deployment and hot loading

Comparison name	Thermal deployment	Thermal loading
Need to restart	Unwanted	Unwanted
Needle face	Entire application or container , New or reduced documents 、 Folder	Local （ For changing source code ）
Memory clear	Meeting	Can't , May trigger OOM

Last

     Do not manage hot deployment and hot loading , In fact, the ultimate goal is no need to restart the service , Realize automatic service loading , It's just that hot deployment is more comprehensive , For the whole project , While the hot load only makes partial updates to the changed file code , Invalid for new file or directory , Need to redeploy . Of course for java language , Hot loading is a relatively mature technology , And for tomcat Hot deployment is also a comparative method , Throw the document directly into webapp Automatically deployed . There will be different uses in different scenarios . image ideea、vscode quite a lot ide Will realize the function of hot deployment , Therefore, at the development level, it greatly improves the efficiency of our research and development .

     Reference article ：

    https://blog.51cto.com/u_11103019/3766234

    https://www.cnblogs.com/lanqingzhou/p/13590334.html

    https://www.cnblogs.com/diexian/p/13501359.html

    https://blog.51cto.com/u_13567403/3043758

    https://blog.csdn.net/zhanglh046/article/details/115843463