尽管有了管理连接池的资源管理器，但是还不能保证ejb层具有最优性能——还有一些设计考虑事项！
The fact that you have resource managers that manage your connection pools does not guarantee optimum performance from the EJB layer — there are some design considerations as well!
另一种限制源自于这样一个事实：域对象可以通过由实体管理器所管理的域对象所在的层访问，也可以通过分离它的所有其他层访问。
Another restriction arises from the fact that the domain objects can be accessed both in the tier where they are managed by the entity manager and in all the other tiers where they are detached.
设备管理器api为程序员提供了许多访问设备管理层丰富资源的方法。
The device Manager API provides many ways for programmers to access the riches of device management.
它报告文件系统的所有层的使用率，包括逻辑卷管理器(LVM)、虚拟内存和物理磁盘层。
It reports on all layers of file system utilization, including the Logical Volume Manager (LVM), virtual memory, and physical disk layers.
可以对服务层进行配置，以根据目标环境的功能使用不同的事务管理器。
You can configure your service layer to use different transaction managers depending on the capabilities of the target environment.
在三层架构中，队列管理器只了解应用程序的身份。
In the three-tier architecture, the queue manager knew only the identity of the application.
并行作业管理器层同样也是计算网格的组成部分，可以将较大的作业分解为较小的分区、并为跨集群执行的分区作业提供操作控制。
Parallel Job Manager tier, also part of Compute Grid, decomposes large jobs into smaller partitions and provides operational control over partitioned jobs executing across the cluster.
组合使用并行作业管理器(PJM)、n层缓存结构和关联路由，可以提供功能强大的高性能计算网格。
Combining the Parallel Job Manager (PJM), N-tier caching structures, and affinity routing provides a powerful, high-performance compute grid.
从图1可以看出，使用JDBC 1.0通过数据库管理器获取和释放数据库连接将影响ejb层的性能。
You can see from Figure 1 that acquiring and releasing database connections via the database manager, using JDBC 1.0, will impact the performance on the EJB layer.
如果是一个数据库管理器层的配置参数。
diagpath参数是数据库管理器层的配置参数，它指向DB 2诊断信息的完整路径。
The diagpath parameter is the database manager level configuration parameter that points to the fully qualified path for DB2 diagnostic information.
有很多轻量级的窗口管理器可以使你更好的通过X层访问你的系统。
There are many lightweight window managers that will give you better access to your system through the X layer.
在这种情况时，链路管理器可能为特定的网络层过滤数据包，而只使一个程序受影响。
If this is the case the circuit manager may wish to filter out datagrams for the appropriate network layer if only one of the applications is affected.
通过用户界面、点抢购、通用工具和层管理器，这个视频包含了许多用于所有用途的关键要素。
Ranging through User Interface, Point Snapping, General Tools and the Layer Manager, this video covers many of the crucial elements needed for all purpose usage.
通过用户界面、点抢购、通用工具和层管理器，这个视频包含了许多用于所有用途的关键要素。
Ranging through User Interface, Point Snapping, General Tools and the Layer Manager, this video covers many of the crucial elements needed for all purpose usage.
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