Today, to coincide with the snow, you should be home, Cao Cao and Liu Bei doing nothing, being at the cottage, cooking wine when talking about world affairs.
Cao Cao: Today, micro-services everywhere, some terms or concepts coming out one after another, spreading the doctrine. You see, that "fuse downgrade" is one of them.
Liu Bei: No, "blown" and "downgrade", which is two people. But they often go together stopping someone's home, so they put their names together called.
Cao Cao: er er, you're right. They also have their own official slogan,
Such as fuse, "We provide overload protection. When a service failure or abnormal, the abnormal condition if we need to deal with, we'll take some protective measures --- directly fuse the entire service, not been waiting for this service timeout, prevent failure of the entire system. ".
Another example is downgraded, "We provide undermine services to ensure flexibility available services, to avoid the avalanche effect, in order to maintain the stability of the whole system. When the server pressure surge, according to the current business situation and traffic, we will have some services pages and strategic operations to relieve pressure on the server resources to ensure the normal operation of the core business, but also to ensure that the majority of customers get the right response. ".
Liu Bei: er er, this slogan is interesting. Do you know who they are student?
Cao Cao: do not know about this, but have heard rumors related. Words, a large coffee programmer called nameless, there are fans one day to ask him a question, a system as a service the volume of traffic and often collapse, there is no good solution? Nameless all of a sudden there is no good idea to come up out of the rice cooker to cook something, because I wanted was more ecstatic, took a high-power (dormitories have this restriction, had bought the wrong), just started cooking on the power the nameless immediately meant to have taken the wrong pot, power tripping caused the overrun. Then after a few minutes, the power supply and automatically returned to the hostel, which is a backup power supply. Lights up, the unnamed also captures that beam of light, (the power is too large, the protection circuit for the automatic tripping; disconnect the main power supply, the standby power up, smooth life). Oh, that the problem is not solved it can be? Then, he put forward the concept of "blown" and "downgrade" and were passed to the two students.
Liu Bei: It seemed genuine! After all, from life, from life! And the king's remarks, ten years of reading it! Yoshiya Yoshiya!
Reference: SpringCloud (. 6) --- fuse degraded appreciated, Hystrix combat
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