悲观会话锁定是一种序列化形式，会严重地影响系统的可用性，须小心使用。
Pessimistic session locking is a form of serialization and can severely limit system availability, and so should be used with caution.
和优化器一样，调度器使用设备架构从系统的每个组件收集有关资源可用性的度量指标。
Like the optimizer, the scheduler USES the appliance architecture to gather metrics about resource availability from each component of the system.
最后，可能仅需使用IT来确保使用适当的中间件维护系统，以及为确保系统的可用性提供监控和支持。
It might be needed only to ensure that the systems are maintained with the appropriate middleware and that monitoring and support are provided to ensure system availability.
在这一期中，您已经了解了如何在Linux操作系统上使用开源软件实现WebSphereMQ的高可用性。
In this installment, you have seen how to implement high availability for WebSphere MQ using open source software on the Linux operating system.
更复杂的程序可能使用操作系统信号和简单网络管理协议（SimpleNetwork Management Protocol，SNMP）管理可用性。
Programs that are more sophisticated might use operating system signals and Simple Network Management Protocol (SNMP) to manage availability.
WindowsAzure，或者说“云中的Windows”，代表了微软在高可用性、类如Windows Update等高使用系统方面的多年努力成果。
Windows Azure, or "Windows in the Cloud", represents the knowledge Microsoft has gained from years of working on high availability, high use systems like Windows Update.
CIA三部曲是广泛使用的信息保证(Information Assurance,IA)模型，此模型将保密性、完整性和可用性定义为所有信息系统的基础安全特征。
The CIA triad is a widely used information assurance (ia) model that identifies confidentiality, integrity, and availability as the fundamental security characteristics of all information systems.
卫星通常使用各种方法来实现可用性，从辐射加固其组件到整合冗余系统与总线。
Satellites commonly use a variety of methods for availability, from radiation hardening their components to incorporating redundant systems and buses.
从使用者的角度来看，访问目标系统中的整合数据与访问该系统中任何其他的数据具有相同的可用性特性。
From a consumer perspective, accessing consolidated data in the target system has the same availability characteristics as accessing any other data in this system.
最后，使用全系统复制，就不能利用高可用性环境的优势来缩短操作系统升级导致的中断时间或减少毁灭性硬件维护。
Finally, with full system replication, you can't take advantage of the high availability environment to reduce OS upgrade outages, or for less disruptive hardware maintenance.
如果客户机改变了，那么可以增加一些层次或者改变可用性与能力的组合，每次都要使用和围绕着已经建立的系统。
If the client changes, you add layers or change the blend, each time working within and around the system you already built.
尽管大量反复的咨询十分耗时，但是对于编写一个可用以评估hia过程中使用的公共可用性研究证据的简单、系统化的、易获取的指南来说，这种咨询却是至关重要的。
Substantive and iterative consultation, though time-consuming, was pivotal to producing a simple, systematic and accessible guide to reviewing publicly available research evidence for use in HIA.
接下来的章节讨论LoadLeveler可用于高用性的一些内在能力，以及可以如何使用heartbeat提高整个系统的可用性。
The next sections discuss some of the built-in capabilities of LoadLeveler for high availability and how you can enhance the overall system availability by using heartbeat.
标准可用性测试(Standard usabilitytest)。将图标和整个用户界面一起展示给用户，要求用户使用系统完成一系列预先设定的任务，并在完成任务的时候进行出声思维。
Standard usability test in which the ICONS were shown to users as part of the full user interface and where the users were asked to "think aloud" as they used the system to perform set tasks.
使用集群方式的应用程序可以提高系统的可靠性和可用性。
Clustered applications can improve system reliability and availability.
不仅在设计和可用性方面，而且对系统资源的使用，稳定性和性能。
Not only in terms of design and usability but also regarding system resources usage, stability and performance.
结果这类系统可用性差，有的甚至在备份之前要人为中止文件系统的数据访问服务，致使用户使用不便。
These above result in the low availability of these backup systems and cause the systems are hard to use by user.
CAP是细粒度的。你可以在系统的不同部分使用不同的选择。比如，在接受订单的时候，往往可用性是值得保证的因为你不想失去订单。
CAP is fine-grained. You can make different choices in different parts of your system. For example, for accepting orders, usually availability is desirable as you don't want to lose the orders!
考虑到这些系统是世界级规模的，我们无处不在使用冗余技术来保证一致性能和高可用性。
Given the worldwide scope of these systems, we use replication techniques ubiquitously to guarantee consistent performance and high availability.
这里公开了一种在无线通信系统中使用接入点可用性信息的设备、方法和计算机程序产品。
Disclosed herein is an apparatus, methods and computer program products for using access point availability information in a wireless communications system.
普适可用性的原则就是让用户界面的设计贴近于用户的任务模型，拉近了系统与用户的距离，降低用户使用系统时的认知负担。
The user interface based on pervasive usability is closer to the user's task model, and can reduce their cognitive burden when operating the system.
这些工具可帮助您监视和报告有关服务器可用性的信息，在系统之间无缝切换键盘和鼠标输入，以及测量带宽使用情况。
These tools can help you monitor and report on server availability, seamlessly switch keyboard and mouse input between systems, and measure bandwidth.
由于大部分磁盘阵列重建算法需要花费大量时间重建块级未被使用的存储空间，影响了存储系统的可用性。
Most existing RAID reconstruction algorithms must take a great deal of time to reconstruct the block-level unused storage space, thus affecting the availability of storage systems.
一些可用性专家强调，对于任何系统高可用性，系统的部分应精心设计和使用它们之前全面测试。
Some availability experts emphasize that, for any system to be highly available, the parts of a system should be well-designed and thoroughly tested before they are used.
一些可用性专家强调，对于任何系统高可用性，系统的部分应精心设计和使用它们之前全面测试。
Some availability experts emphasize that, for any system to be highly available, the parts of a system should be well-designed and thoroughly tested before they are used.
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