云计算知识点
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让一堆不可靠的设备连接起来然后变成可靠的
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map映射
reduce合并
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soa是一种理念
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优势:成本低廉,敏捷快速,扩展好,
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云计算的分类及应用
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三、弹性负载平衡
弹性负载平衡功能允许EC2实例自动分发应用流量,从而保证工作负载不会超过现有能力,并且在一定程度上支持容错。
弹性负载平衡功能可以识别出应用实例的状态,当一个应用运行不佳时,它会自动将流量路由到状态较好的实例资源上,直到前者恢复正常才会重新分配流量到其实例上。
四、自动缩放
自动缩放可以按照用户自定义的条件,自动调整EC2的计算能力:
自动缩放功能特别适合周期性变化的应用程序,它由CloudWatch自动启动。
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五、服务管理控制台
各项技术通过互相配合来实现EC2的可扩展性和可靠性
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cdn
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购买cdn加速后,会提供一个域名,在解析里cname到提供的域名
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wtf // 4.20 丢失, 候补 已补
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// 4.26
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hypervisor 熔断和幽灵
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5.18 课本120页 CPU虚拟化
6.15
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阅读剩余
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