综合考虑，最终提出了基于存储网络的高可用性系统的方案。
Synthesize the consideration, putting forward the high availability cluster system scheme, which is based on network storage system.
高可用性系统设计中面临的首要问题是系统的体系结构设计。
To design a ha system, system architecture is the first issue that has to be solved.
一个高可用性系统以最短的停机时间，可靠地提供了可接受级别的服务。
A highly available system reliably provides an acceptable level of service with minimal downtime.
如今的高可用性系统的主要目标是：不间断的服务，动态的资源管理，方便的管理工具。
The High Availability system aims at continuable service, dynamic resources management and convenience system manage tools.
高可用性系统将软件和工业标准硬件相结合，在系统、组件或应用程序发生故障时快速恢复来使停机时间最小化。
High availability systems combine software with industry-standard hardware to minimize downtime by quickly restoring services when a system, component, or application fails.
本文首先分析了骨干路由器的高可用性要求，设计并实现了一种基于消息传递机制的面向协议软件的高可用性系统。
We analysis the requirements of high availability of core router firstly, design and implement a protocols oriented high availability system based on message passing.
集群中所有节点对数据的并发访问，以及某些分布式文件系统所内置的高可用性，是它们成为集群环境理想选择的两方面原因。
Concurrent access to data from all nodes in a cluster and the high availability built into some distributed file systems are a couple of reasons why they are ideal for a cluster environment.
唯一的区别是，在保持系统高可用性、容错能力和伸缩性的同时，我们现在提供了一个丰富的SQL模型。
The only difference is we are now providing a rich SQL model while maintaining the high availability, fault tolerant and scale aspects of the system.
大型数据库系统的主要特征是一致性、高可用性和可伸缩性。
The key features of large database systems are consistency, high availability, and scalability.
万一软件或硬件发生故障，一个高可用性解决方案保证系统自动恢复。
A high availability solution guarantees that a system will automatically recover in the event of a software or hardware failure.
在很多情况下，高可用性应用程序显著地为它试图访问的后端系统所影响。
There are some scenarios where high availability of the application is markedly affected by the backend system it is attempting to access.
如果有大量LPAR，恢复所需的停机时间在某些情况下可能是不可接受的，比如如果有不属于高可用性集群的系统。
If you have lots of LPARs on a frame, the down-time required for the restore may not be palatable in some case, such as if you have systems that are not clustered for High 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.
当WebSphereApplicationServer中的高可用性管理系统非常繁忙时，可能会出现发送会话失败的情况。
When the high availability management system in WebSphere Application Server gets very busy, a failure to send the session might occur.
ibm有关于WebSphere和DB 2UDB管理的完整文档，包括如何设置测试系统，如何构建具有高可用性支持的大型集群。
IBM has comprehensive documentation on WebSphere and DB2 UDB administration, from setting up a test system, to building a huge cluster with high availability support.
从系统管理员角度看，HACMP背后的理念是保持所有资源尽可能冗余，从而在所有层面上确保高可用性。
From a systems administration point of view, the main concept behind PowerHA is to keep everything as redundant as possible to ensure that there is high availability at all levels.
虽然一直以来很多组织在集中式的系统(例如大型机)上提供高可用性，但是现在越来越多的关键性的应用程序被部署在分布式(例如unix, Windows)平台上。
While many organizations have provided high availability systems on centralized e.g. mainframe platforms for some time, the number of critical applications now being deployed on distributed e.g.
新合同将提供了新型NeuralStar 9.5版高可用性网络解决方案，支持JMOS系统体系结构。
This new contract award delivers new licenses and services for NeuralStar version 9.5, a high availability network solution that supports JMOS 'paired system architecture.
文件已经拷贝到infinispan系统中，当一个实例停止的时候，我们还可以从另外一个实例中继续读取文件，这也是高可用性的样例。
Files are copied to them, and high availability is demonstrated as one instance is shut down while files are still read from the second instance.
确定应用程序有可以转移到另一个系统上的服务IP标签，从而保持应用程序的高可用性。
Ensures that the application has a service IP label that can be transferred to another system, thus keeping the application highly available.
高可用性是在系统、组件或者应用程序发生故障时快速恢复基本服务的系统管理策略。
High availability is the system management strategy of quickly restoring essential services in the event of system, component, or application failure.
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.
提供一个整洁的系统管理界面：对于高可用性的人为错误，一个最大的障碍是缺少整洁的系统管理界面。
Providing a clear system management interface: One of the biggest hindrances for high availability related to human errors is the lack of a clear system management interface.
高可用性数据库解决方案能够确保，万一数据库方案中某一部分宕机，可无缝切换到备份系统。
A highly available database solution ensures that, should any integral part of your database solution go down, your system would seamlessly fail over to a backup.
当系统没有不需要的停机时间时它具有高可用性。
A system is highly available when it achieves no unwanted downtime.
高可用性是提高可用性的一个系统设计原理。
High availability is a system design principle for increased availability.
高可用性：系统能对操作进行恢复，从而使得它在遇到组件出错的情况，也可以重新开始正在提供的服务。
Highly Available: it can restore operations, permitting it to resume providing services even when some components have failed.
“我们的客户的业务依赖这些系统，他们相信这些系统坚如磐石，不出问题，具有高可用性，”Gandolfo说。
"Our customers bet their businesses that these systems are going to be there and work without problems and with high availability," Gandolfo says.
我们的目标是设计一个分布式系统，具有之前提到的特性(容错、高可用性、可恢复性等)，那样就意味着我们必须针对故障的情况进行设计。
Our goal is to design a distributed system with the characteristics listed above (fault-tolerant, highly available, recoverable, etc.), which means we must design for failure.
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.
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