传统高可用系统存在可扩展性较差的问题。
Limited scalability is a common problem for traditional high availability systems.
文中还对高可用系统理论作了初步探讨，对系统可用度进行了分析。
He also makes some initial inquiry into the High availability theory and analysis of the availability of the system in the article.
传统的高可用系统的测试以手工测试为主，需要大量的人工参与，测试的过程不够规范。
Traditional High-Availability system testing is primarily base on manual testing, which is not normative enough.
本文针对并行文件系统集中式元数据管理存在单一失效点的问题，设计了一种双元服务器高可用系统。
To the question that a single failure point exists in the centralized metadata management for parallel file systems, this paper presents a dual-metadata server system for high availability.
本文首先从分析高可用技术的特点入手，理清了高可用系统的基本结构层次，并对现有模型的几个重要角色及其操作进行了简介。
The paper analyzes the characters of the ha technology, cleans up the basic structure arrangement of the ha system, and gives the brief introduction of several important roles in the existing model.
高可用技术包括RAID、集群、数据库复制和硬件复制，企业可以根据自身的情况，使用一种或多种技术，建立满足自己需求的高可用系统。
The high availability technology includes RAID, cluster, database replication and hardware replication. The enterprise should take one or more technology to meet his own HA requirement.
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.
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.
系统会为所有应用程序实例考虑负载均衡和高可用方面的事情。
The system takes care of load balancing and high-availability for all application instances.
系统必须是高可用的吗？
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.
可用性——测量系统的正常运行时间，并包括高可用性和故障恢复。
Availability a "measures the system 'up-time, and includes high-availability and disaster recovery."
如果您在编写Erlang代码，很可能是要构建高可用的系统。
If you are writing Erlang code, chances are you want to build a high availability system.
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.
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.
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.
如果在整个磁盘子系统中有一个高磁盘配置或低磁盘配置，则可能需要修改最大值，以便更准确地表示可用带宽。
If you have a high — or low — throughput disk subsystem, you may need to modify the maximum value to more accurately represent the available bandwidth.
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.
该系统对于高可用性具有特殊的需求。
There was a special need for high availability for this system.
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.
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.
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.
集群指定的一个系统将接管原来在死亡系统中运行的服务组，以确保应用维持高可用。
A designated system in the cluster then takes over the service groups running on the departed system, ensuring the application remains highly available.
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.
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.
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.
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