联合服务器可信上下文定义。
数据联合服务器接收对集成视图的请求。
The data federation server receives a request to the integrated view.
联合服务器数据源配置。
考虑是否需要在联合服务器上设置用户映射。
Consider whether you need to set up user mappings on the federation server.
联合服务器应支持由多个请求者发起的并发请求。
The federated server should support concurrent requests initiated by multiple requesters.
联合服务器工作负载(事务量)对源系统的影响。
Impact of federation server workload (transaction volume) to sources.
确保在联合服务器上创建并启用了可信上下文对象。
Ensure that you have created and enabled a trusted context object on the federation server.
数据联合服务器负责接收定向到各种源的集成视图的查询。
The data federation server is responsible for receiving a query directed at an integrated view of diverse sources.
根据映射定义，联合服务器将联合查询拆分为多个子操作。
According to the mapping definition, the federation server breaks down the federated query into multiple sub operations. Multiple factors influence this step.
联合服务器是一个虚拟数据库，具有关系数据库的所有功能。
The federation server is a virtual database with all of the capabilities of a relational database.
联合服务器会将其接收到的每个请求的子操作转发到源系统。
The federation server forward for each request that it receives sub-operations to source systems.
联合服务器仅在处理从使用者接收到的请求时才会使用资源。
The federation server only utilizes resources when it processes a request that it receives from the consumer.
联合服务器还必须提供查询优化功能，以最高效地响应请求。
The federation server must also provide query optimization capabilities in order to respond to the request most efficiently.
数据联合服务器可以使用(为了集成)多个信息源提供的服务。
The data federation server can consume — in order to integrate — services provided by multiple information sources.
在源中执行一系列操作与在联合服务器上执行这些操作的性能影响如何？
What are the performance implications when executing a set of operations in the sources vs. the federation server?
系统管理数据源支持哪些操作，哪些操作必须由联合服务器提供补偿机制？
What operations are supported by the systems managing data sources and which have to be compensated by the federation server?
在soa上下文中，使用者通过预定义的请求格式向联合服务器提交请求。
In the SOA context, the consumer submits a request via a predefined request format to the federation server.
联合服务器将请求转换为对应的SQL查询或视图定义，以支持服务。
The federation server transforms the request into the corresponding SQL queries, or view definitions, to support the service.
集成数据的可用性依赖于数据联合服务器和集成源服务器在请求时的可用性。
The availability of integrated data depends on the availability of the data federation server and the integrated source servers at the time of the request.
假定已经配备了联合服务器基础设施，则使用最好的联合引擎会相对较为廉价。
It is relatively cheap if utilizing the best-of-breed federation engines, assuming a federated server infrastructure is in place.
有效管理并发访问的能力由数据联合服务器和所集成的源服务器的性能特征决定。
The ability to efficiently manage concurrent access is determined by the performance characteristic of the data federation server as well as the integrated source servers.
SaaS提供者将使用这个由承租者的联合服务器所颁发的安全令牌进行授权。
The security token issued by the tenant's federation server will be used by the SaaS provider for authorization.
另外，从源系统接收到的数据量和需要通过联合服务器的数据量也影响资源使用率。
Also, the amount of data that is received from the source systems and needs to go through the federation server impacts the resource utilization.
切记如果客户端和联合服务器位于同一个机器上，则默认情况下DB 2使用IPC。
Remember that if your client and federated server are on the same machine, then DB2 USES IPC by default.
最后，验证联合服务器上的可信连接对象从建立连接之时起没有被禁用、放弃或改变。
Finally, verify that the trusted context object on the federation server has not been disabled, dropped, or altered since your connection was established.
在很多情况下，数据联合服务器都具有与数据库或内容服务器很类似的特征。
In many cases, the data federation server has very similar characteristics than a database or content server.
这就允许数据联合服务器接收对集成视图的查询和计算要执行的最优子操作数量和类型。
This allows the data federation server to receive queries against the integrated view and to calculate the optimum number and types of sub operations to perform.
这将对源系统的资源使用率造成负面影响，因为需要对来自联合服务器的子操作做出响应。
This impacts the resource utilization at the source systems negatively in that they need to respond to the sub-operations from the federation server.
支持对此集成视图的写访问时，联合服务器必须将各个源中的数据操作同步到逻辑工作单元中。
When supporting write access to this integrated view, the federation server must synchronize the manipulation of data in the various sources into a logical unit of work.
联合查询的复杂性：为了执行查询，联合服务器需要执行多少筛选、联接、排序之类的子操作。
Complexity of the federated query: how many sub-operations such as filtering, joining, sorting, and so on, does the federation server need to execute to perform the query.
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