系统将根据无效消息的通信确定数据副本是新鲜的还是陈旧的。
The copies of the data are determined to be fresh or stale based on the communication of invalidation messages.
现在，您了解了两个数据副本的优势和劣势。
You now have the advantages and drawbacks of two copies of the data.
使用一个生产数据副本来进行测试。
验证将域中的数据与现有的数据副本进行比较。
Verification compares the data in a field to an existing copy of the data.
快照支持存储一个特点时间的的数据副本。
Snapshotssupport storing a copy of data at a particular instant of time.
客户需要确保不会从系统中删除最近的有效数据副本。
The customer needs to make sure they are not about to remove the last good copy of their data from the system.
它为您节省了保存数据副本所需的额外空间。
That saves you having to allocate additional storage to hold a copy of your data.
副本创建策略是数据副本研究中的重要问题之一。
Replica creation strategy is one of the most important issues in research of data replication.
企业中可能存在数据副本，这会影响操作数据的准确性。
Potential existence of data duplication in the enterprise, which compromises operational data accuracy.
大多数CDM软件作品通过创建一个完整的数据副本。
Most CDM software works by creating just one full copy of the data.
系统将根据无效消息的通信确定这些数据副本是新鲜的还是陈旧的。
The copies of the data are determined to be fresh or stale based on communication of invalidation messages.
使用LEI复制来创建数据副本，这样还允许移动用户完全地离线操作。
Using LEI replication to make a copy of the data also lets mobile users operate completely off-line.
由于这些技术只使用一份数据副本，所以磁盘仍然会出现单点故障。
Since these technologies do only utilize one copy of the data, the disk would still be a single point of failure.
对主要服务器的任何更新会立即复制到辅助服务器，以维护一个活动数据副本。
Any update made on this primary server is immediately replicated to the secondary server so as to maintain a copy of the active data.
对不同数据副本分布方式进行探讨，同时，论证了最优副本分布方案。
After discussing many data copy distribution modes, an optimized data copy distribution is proved in this paper.
有些变体保留所有应用程序中的数据副本——同时包括内存和交换空间中的应用程序。
Some keep a copy of the data in all applications — both memory and swap space.
为此，如果在并行路径中使用同一存储库，则导出中的每个路径将具有自己的数据副本。
For this reason, if you use the same repository in parallel paths, each path in the export will have its own copy of the data.
集群中的两个队列管理器被指定为维护集群中的所有元数据副本是完整的、最新的。
Two queue managers in the cluster are designated to maintain a complete and up-to-date copy of all metadata for the cluster.
在数据网格环境下探讨数据副本创建策略，包括域内副本衍生和域间副本扩展策略。
This paper discusses the data replication strategies and algorithms in the data grid environment, including the intra-domain replica derivation and the inter-domain replica expansion.
本文在网格环境中探讨了数据副本创建策略，包括城内副本衍生和域间副本扩展策略。
This paper discusses the data replication strategies for the network environment, including the intra-domain replica derivation and the inter-domain replica expansion.
为此将数据副本机制与信息安全结合起来，提出一种决定数据资源副本数量的数学模型。
Combining data replication with security, we proposed a mathematic model which can determine data replication quantity.
端到端性能得到改进，原因是不需要在数据库(或其他XML数据源)和中间层之间创建数据副本。
End-to-end performance is improved as there are no copies of the data made between the database (or other XML data source) and the middle tier.
服务器端的一致性水平取决于如何在数据副本之间传播更新(这是改善吞吐量、提供可伸缩性的典型方式)。
The level of consistency on a server side depends on how updates are propagated between data replicas (which is the typical way to improve throughput and provide scalability).
您当然会使用副本作为备份，且在希望使用一个新程序而又不将操作数据置于风险中时将数据副本用作测试目的。
You would certainly use copies for backup and also for test purposes where you want to try out a new program without putting your operational data at risk.
只有部分数据副本参与更新操作，且/或作为读操作的一部分与其它副本进行联系时，就会出现弱/最终一致性。
Weak/eventual consistency happens when not all data replicas participate in the update operation and/or contacted as part of read operation.
例如，您可能使用Polling活动在系统中搜索新的销售订单记录，然后自动向会计应用程序发送数据副本以生成帐单。
For example, you might use a Polling activity to search for new sales order records in your system and then automatically send a copy of the data to your accounting application to generate a bill.
在LHC需要巨大的计算能力来存储数据。一个主要的数据副本存储在CERN，但它在整个地球上其他地方推广。
The LHC requires tremendous computing power to store data. A primary copy of the data is stored at CERN, but it's replicated elsewhere across the planet.
因此，代码的可重入区域通常必须使用局部变量，也仅以此方式，每个对这些代码的调用才会有独属于自己的一份数据副本。
Thus re-entrant section of code usually must use local variables only in such a way that each and every call to the code gets its own unique copy of data .
针对网格环境下数据高度动态性的特点，提出了一种基于价值模型的数据副本替换算法，给出了副本价值计算方法，并把它应用到数据副本替换中。
Adapting to the high variation environment in data grid, a data replica replacement algorithm based on value model is proposed and the arithmetic to calculate replica value is introduced.
您可以在不需要任何基础结构组件(如ldap负载平衡)的情况下将WebSpherePortal连接到多个卷影(包含相同数据副本的LDAP)。
You can connect your WebSphere Portal to multiple shadows (LDAPs containing the replications of identical data) without the need for any infrastructure component like LDAP load balancer.
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