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When microservices were still in their infancy, a service-oriented architecture was favored by many developers for its flexible scalability, pay-as-you-go, and no-maintenance features. Chen Jie, a technical expert of Tencent architecture platform Department, said that the core concept of cloud function is to provide a public framework for the entire service, and specifically solve a series of problems such as service access, security, capacity expansion, disaster recovery and distribution.
Tencent architecture platform department technical expert Chen Jie
According to introduction, the value of cloud function is mainly reflected in four aspects. The first is to simplify the architecture. Cloud functions are services organized by function granularity, which is a kind of natural microservice architecture. But simplified code development, users do not need to write network services, authentication, distribution, disaster recovery, expansion and shrinkage code, only to achieve the most core business logic; Second, simplify operation and maintenance. For cloud functions, there is no need to care about the operation of servers and the configuration of the service itself, which is a natural Devops. The third is to reduce expenditure, cloud function can solve the problem of idle more than 80% of the cost of cloud host, because it only allocates resources upon request.
Chen Jie pointed out in the forum that cloud functions are characterized by real-time allocation of function instances on demand, fast expansion and reduction of function instances, and billing based on actual use, etc., which are currently more suitable for building stateless microservices. For the service with obvious peaks and troughs, it has obvious cost advantages, but it is not suitable for the scene with very sensitive delay (<20ms) or very long calculation time (>5 minutes). The cloud function will prepare a free amount package for everyone. If the service is called at low frequency, it probably does not need to pay any fee. At present, cloud function is in the initial stage of development, welcome to experience SCF serverless cloud function, look forward to your valuable opinions, we make progress together, promote and witness the advent of serverless era.
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