Source: zhihu

Himself had complete entrepreneurial projects, tencent cloud, ali cloud of pit, also looked at the answer carefully, try to discuss this problem, 1, security problem DDOS this problem is not very want to tell, the thought of a headache, because whether you are IDC self-built or on the cloud, as long as there is a conflict of interest must be met, and now attack cost less and less, so IDC buy cleaning equipment, high cloud bought on prevention, is equivalent to toll, attack hang a horse, I said some of my common, many start-ups is not exclusive operations, many development instead of operational work, no other meaning, even if a lot of specialized operations, safety awareness as co., LTD.), so the redis open public service directly, probably have a few hours, your root authority was taken away, many examples of this, if you would see HTTP access log, you will find vulnerability scanning requests flowing, as long as a carelessly, authority was taken away, the database is upside down, from the way, the simple network planning, the private network, server, network level of port control, can significantly increase the cost of others attack, security problem actually, pot should not be all back by the cloud service provider, but who said let vendors from morning till night cloud good... 2, that is, performance issues such as common disk IO, network IO, began to test pressure test no problem, abnormal performance is excellent, at 7 PM IO in a great mess, see monitor local load is not high, is card ChengXiang, tread the pit, suddenly understand, you are the same as the server of the other brother must be a high load slow you down, even if you have multiple machines do load-balancing didn't also way, some machine is fast, sometimes slow, statistical monitoring a sad tears, actually a lot of problems not said, and some hard, is not just a cloud of tencent, ali cloud, kingsoft cloud group, Meituan cloud, I had the opportunity to experience tested a variety of services, like dissatisfied housewife opened it I can speak three days and three nights, after the last we scale up is cloud + IDC self-built, through special line get through, some need high-speed expansion of the business fast on the cloud, the business such as stability after back to IDC,

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