etcd is an open source and highly available distributed key-value storage system and is commonly used in critical data storage and service discovery and registration use cases. It is focusing on:Simple: well-defined, user-facing API (gRPC)Secure: automatic TLS with optional client cert authenticationFast: benchmarked 10,000 writes/secReliable: properly distributed using Raftetcd and Redis both support key-value storage and can be set up in distributed systems. Also Redis supporst more key value types. But they are used in different use cases and have different focus areas given below differenc...

BackgroundIn distributed systems, there is one effect where the unavailability of one service or some services will lead to the service unavailability of the whole system, this is called service avalanche effect. A common way to prevent service avalanche is do manual service fallback, in fact Hystrix also provides another option beside this.Definition of Service Avalanche EffectService avalanche effect is a kind of effect where the service provider fails to provide service which causes the service caller also fail to work. And this kind of service unavailability will propagate to the whol...