Kết nối qua trang trại Một khi bạn hiểu được các ứng dụng dịch vụ và tất cả các kết nối của họ ở nông trại của bạn, bước hợp lý tiếp theo là thêm nhiều kết nối hơn. Một số các ứng dụng dịch vụ có khả năng được xuất bản và sau đó tiêu thụ trên khắp các trang trại khác nhau SharePoint. | Service Application Fundamentals 175 Connecting across Farms Once you understand the service applications and all of their connections in your farm the next logical step is to add more connections. Some of the service applications are capable of being published and then consumed across different SharePoint farms. Even more impressive is the fact that all of the service applications except the User Profile service application don t even require the two SharePoint farms to be in trusted Active Directory domains. Before you can publish or consume the service applications between two farms you have to establish a farm trust. This is done by using the SharePoint 2010 Management Shell to create and register certificates between the two farms. This is covered in greater detail in the section Service Application Administration later in the chapter. After the farm trust is configured you can go to the publishing farm and select the service application you want to publish. Once it is published you will get a URL for accessing the published service. From the consuming farm you simply connect to the published service by providing the URL. Then the connected service application can be added to a service application group and will provide services just as if the service application had been part of the farm. Figure 7-7 shows an example of four farms at work. Farm 1 introduces a new concept an enterprise services farm. This is something typically seen only in large companies. The idea is that a farm is created and maintained exclusively to provide services to other SharePoint farms throughout the organization. This way the services farm can be optimized for hosting services and can be maintained in the same manner. For example a Search index might contain several million items requiring several days to do a full crawl and hours to do an incremental crawl. In order to do this efficiently you need to optimize your hardware for Search. If you have three SharePoint farms and each .
