博科CDN应用加速解决方案.ppt

* * * * * * * * * * * * * * * * * Here are the numbers…Tolly-certified at launch on May 11th * * * * * * * * * * * * * * * * * May 2003 Updated customer list * AOL needs no introduction. The largest ISPs in the world. With 33 million online subscribers using their services for 10 Billion hours a year, the demands placed on the Brocade Load Balancers are undoubtedly high. AOL uses more than 1200 switches with ports in excess of 30,000 to support their huge demand for Layer 4-7 switching. Very high performance and large capacity are the key requirements for ISPs. AOL uses Layer 4-7 switches for a variety of applications like GSLB, SLB and TCS. The global powerhouse they are, the need to scale applications around the globe is critical, and Brocade switches satisfy that need. * CheckFree is a leading online Bill Pay company. They rely on Brocade ServerIron products to support their 400+ million annual transactions. In addition to the load balancing features and functions, they required high availability, easy manageability, and integrated routing support. They found all these and more in Brocade products. The ServerIron switches load balance almost everything and anything in their network including web servers, databases and mainframe systems. They picked Brocade technology and solutions because of the superior performance and reliability. Additionally, they came to love Brocade’s customer support. 应用服务器负载均衡 4-7层交换机收到用户请求 利用实时的健康信息和性能信息选择最佳的服务器 充分的同时利用所有可用的服务器 在应用服务器间智能的均衡分配流量动态均衡各个内容缓存站点的负荷分配，为用户的请求选择最佳的访问站点，同时提高网站的可用性。 根据网络拓扑结构、网络延时、服务器负荷和规则等策略设定，指定最优站点向特定的内容请求提供服务。 Brocade ServerIron Switch Application Servers 全局负载均衡 GSLB 控制器与本地的ServerIron协调负载均衡全球的数据中心的流量 包含site健康,负载, 用户接近度, 和服务响应时间等以便提供用户对站点的选择 在灾难或者服务出问题时提供透明的 site failover 当不容易实施DNS方式时，要支持路 OSPF/BGP的路由健康注入 运用DNS和非DNS解决方案 来做到多点冗余 提供容灾恢复和永远不停的运转 Transparent Cache Switching (TCS)透明缓存交换 - Partnering with Blue Coat ProxySG 对缓存服务器的Load Balancing Cache Servers 与普通服务器使用不同的模式 Client 请求必须被从真实服务器引导到 cach