The cost of microservices from a developer's perspective. - backend microservices
Recently I got asked a provoking question - what downsides of microservice architecture can you name? At first, I was surprised since this ubiquitous architectural approach has become almost a gold standard nowadays. A more logical question I would expect is 'why do we use them?' or 'what are the benefits of using microservice architecture instead of monolith?'.
Imagine a chain of services communicating with each other. At some point, the network between them will experience problems, or one service will go down or be forcibly restarted to scale up or down. We need to instrument our code retries and exponential backoffs as a result. We all know how exhausting it can sometimes be to find a bug. With the codebase spread evenly across multiple services, there are no automatic code transitions and prompts showing the usage of the method. The lack of this tooling complicates debugging and consequently requires more time for investigation.
Last but not least, we speak of microservices about multiplying requests and the time for the business flow to complete. Replacing interprocess calls with network ones may result in a critical delay per each call to the application. It is acceptable for most services, but be aware that sometimes it can make a crucial difference.Maintenance costs also show up in the deployment and orchestration of the services. Companies that use microservices often adopt DevOps culture or hire individual staff.
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