Bob的请求也在远程数据源中自己的身份下进行审核。
Bob's requests are also accurately audited at the remote data source under his own identity.
远程数据源上通常不提供关于一个视图的索引或统计信息。
There is usually no index or statistics information provided at the remote data source on a view.
在联邦系统中，服务器表示远程数据源上的一个数据集合。
In a federated system a server represents a collection of data on the remote data source.
异步的优点是通过在远程数据源上重叠执行查询而取得的。
The benefit of asynchrony is achieved by overlapping the execution of the queries at the remote data sources.
服务器定义用于通过所谓的别名从远程数据源访问数据。
The server definition is used to access data from the remote data source through what is called a nickname.
“下推”操作，即让操作发生在远程数据源，是很有益的。
"Pushing down" an operation — allowing it to take place on the remote data source — can be very beneficial.
一旦获得了对远程数据源的访问权限，下一个问题就是数据传输。
Once you've gained access to a remote data source, the next issue is data transfer.
远程数据源上的身份断言对象为建立可信出站连接定义信任属性。
The identity assertion object on the remote data source defines the trust attributes for establishing a trusted outbound connection.
考虑设置这个服务器选项，以便将尽可能多的工作下推到远程数据源。
Consider setting this server option to push as much work as possible to the remote data source.
考虑在联邦服务器上，而不是在远程数据源上执行的选择谓词的影响。
Consider the effect of a selective predicate being evaluated at the federated server instead of at the remote data source.
正如前面指出的，可能需要从远程数据源检索数据或在本地合并处理结果。
As noted earlier, it may require retrieving the data from the remote data source or consolidating the processing results locally.
实际上，Bob的身份现在在同一个物理连接中断言，一直到远程数据源。
In effect, BOB's identity is now asserted on the same physical connection, all the way to the remote data source.
与远程数据源上支持的SQL方言相比，这种方言可以提供更多的功能。
This dialect might offer more functionality than the SQL dialect supported by a remote data source.
别名是远程数据源上驻留的数据集的表、视图或任何其他形式的数据的表示。
A nickname is a representation of a table, view, or any other form of data set residing on the remote data source.
取决于操作的不同，允许在远程数据源上执行操作可能有助于查询的整体性能。
Depending on the operation, allowing it to be evaluated on a remote source might help the overall performance of the query.
对于关系数据源，通常是通过自动查找远程数据源的编目来检索昵称统计信息的。
For relational sources, nickname statistics are usually automatically retrieved by lookup from the catalog of the remote source.
由于只涉及单个远程数据源，启用F2PC并无必要——这里不存在多站点事务。
Since only a single remote source is involved, enabling F2PC is not necessary — there are no multi-site transactions.
整合来自本地表和远程数据源的数据，就好像这些数据是本地存储在联邦数据库中。
Correlate data from local tables and remote data sources, as if all the data is stored locally in the federated database.
这个服务器属性告诉联邦服务器远程数据源和本地联邦服务器上的排序序列是否相同。
This server attribute tells the federated server whether the collating sequence is the same on both the remote data source and the local federated server.
OGSI和WSRF框架对这些服务以及远程数据源提供的接口进行了标准化。
The OGSI and WSRF frameworks standardize these services, as well as the interface presented by the remote data sources.
对于错误消息SQL 1822n，从远程数据源接收到的错误消息内容常常被截断。
For error message SQL1822N, the content of the error message received from a remote data source often gets truncated. You can find the complete error message in the db2diag.log.
内部的服务器属性是决定联邦系统与远程数据源各自所支持的功能的不同之处的关键因素。
Internal server attributes are key factors in determining the differences in functionality that can be supported at the federated system compared with remote data sources.
如果远程计划不是最优的，那么应该与远程数据源的系统管理员联系，以便调查性能问题。
If the remote plan does not appear optimal, the system administrator for the remote data source should be contacted to investigate the performance issue.
另外，被发送到远程数据源的查询由执行层根据缓存内容和高级空抑制逻辑进行进一步优化。
In addition the queries which are sent to remote data sources are further optimized by the execution layer based on cache content and advanced null suppression logic.
为了阅读或修改远程数据源中的数据，您提交引用了昵称的SQL查询给联邦DB 2服务器。
To read or modify data from remote data sources, you submit SQL queries that reference nicknames to the federated DB2 server.
在这种情况下，return操作符的细节包括被传递到远程数据源的远程sql语句的文本。
In this case, the details of the RETURN operator contain the text of the remote SQL statement that is passed to the remote data source.
在这个例子中，假设每个被“转发”的查询在远程数据源上都需要进行复杂的、比较耗时的计算。
In this example, assume that each "shipped" query requires complex, time consuming computation at the remote source.
那些查询即使被下推到远程数据源，其成本也非常高，当远程对象较大时，这一点尤其明显。
Even if such queries are pushed down to the remote source, they can be very costly, especially if the remote object is large.
举个补偿SQL限制的例子，考虑联邦服务器可能允许使用大于其他远程数据源所允许的长度的字符串。
As an example of compensating for SQL limits, consider that the federated server might allow the use of larger character strings than other remote data sources allow.
它提供了远程数据的DB 2关系模型，并通过向远程数据源发送子查询以帮助联邦引擎实现查询处理。
It provides a DB2 relational model for the remote data and assists the federated engine in query processing by sending sub-queries to the remote data source.
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