要保证企业业务不停顿，高可用性数据库集群是企业在关键应用上必须考虑的重要问题。
To ensure the business of enterprises don't grind to a halt. The database cluster with high availability is a vital problem in the key application of enterprises.
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.
在那种情况下，同样应该实现数据库的高可用性，本系列的下一篇文章将对此进行阐述。
In that case, ha for the database should be implemented as well, which the next article in this series will demonstrate.
我们在上文已简要提到，可以通过许多已知和经证实的技术来实现关系数据库平台的高可用性和伸缩性。
As we briefly mentioned above, ensuring the high availability and scalability of a relational database platform can be done through a number of known and proven techniques.
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.
高可用性是重要数据库应用程序的关键需求。
High availability is a key requirement for critical database applications.
此外，对于XML方面来说，DB 2一些成熟的数据库服务已经扩展到了XML文档——备份和恢复服务，高可用性配置，等等。
Further, for the XML side of things, the mature database services of DB2 are extended to the XML documents — back-up and recovery services, high availability configurations, and so on.
通过使用集群，在多个服务器上的多个数据库副本能够提供高可用性。
With clustering, multiple copies of databases on multiple servers provide high availability.
还可以将机器1配置在TSA高可用性集群中，但是不启动数据库实例。
It could also be the case that machine 1 is configured to be part of a TSA high availability cluster, but the database instance isn't started.
如果高可用性集群中某一个服务器出故障，那么集群软件就会将工作负载转移到idle备用数据库服务器。
If one of the servers in the high availability cluster fails, then the clustering software transfers the workload to the idle standby database server.
他们的计算集群正在处理超大规模的数据并有着支持高可用性的架构，低延迟的应用，和与Hadoop相集成的数据库。
They are processing data at a massive scale in computing clusters and have an architecture to support high availability, low latency applications as well as database integration with Hadoop.
除高可用性外，还可以将Oraclerac配置为提供工作负载平衡；数据库的工作负载平衡在连接级别发生。
In addition to high availability, Oracle rac can also be configured to provide workload balancing; workload balance to the database happens at the connection level.
Findclusters：查找并显示OAT连接数据库中所有高可用性集群，并在集群列表中显示它们。
Find clusters: Finds and displays all the high availability clusters that are available in the OAT connections database and displays them in the clusters list.
SQLFire提供了一个JDBC与ADO.NET接口，用于以纯s QL的方式查询数据库，但键与索引却是存放在内存中以提供高可伸缩性、可用性及更棒的性能。
NET interface for querying the datastore in a pure SQL manner, but the keys and indexes are stored in memory to provide high scalability, availability and better performance.
还添加了对高可用性(HA)数据库(包括DB 2HADR和Oracle rac)的支持。
Support has also been added for Highly Available (ha) databases, including DB2 HADR and Oracle rac.
由于数据网格的主要特征是可伸缩性和高可用性，专门用于持久性的高速磁盘和数据库在大多数情况下不再需要。
Since the primary characteristics of a data grid are scalability and high availability, high-speed disks and databases used exclusively for persistence are no longer needed in most cases.
数据库持久性的缺点在于数据库的成本，特别是存储在数据库中的会话数据本身应该具有高可用性的情况下更是如此。
The disadvantage of database persistence is the cost of the database, particularly if the session data stored in the database should itself be highly available.
一个很重要的近期开发是有了为近实时和嵌入式环境优化的数据库，该环境要求微秒级的响应时间以及非常高的可用性。
An important recent development has been databases that are optimized for near-real-time and embedded environments, where microsecond response times and very high availability are required.
另外，通常需要高速磁盘或数据库(或二者)，以增加缓存大小，或获取高可用性。
Additionally, high-speed disks or databases (or both) are typically required to increase the size of the cache, or for high availability.
在传统的数据库部署中数据库复制技术常常被用来达到高可用性。
In traditional database deployments database replication techniques are commonly used to achieve high availability.
为数据库服务器提供高可用性包括使硬件本身具有更高的可用性，而不是提供额外的冗余硬件。
Providing high availability for database servers involves making the hardware itself more highly available, rather than providing additional redundant hardware.
Informix数据库11.70版提供多个特性来确保高可用性集群的不间断可用性。
Version 11.70 of Informix database software provides multiple features to ensure uninterrupted availability of a high availability cluster.
通过使用备用模式(secondary mode)作为只读数据库，DB 2HADR(高可用性灾难恢复)配置可以同时提供具有弹性的可用性和一些负载均衡。
DB2 HADR (High availability Disaster Recovery) configurations can provide both resiliency of availability and some load balancing through use of the secondary mode as a read-only database.
此外，高可用性正变得越来越可扩展事务数据库系统的关键，通常是通过复制和实现自动故障转移在一个崩溃的情况下。
In addition, high availability is becoming ever more crucial in scalable transactional database systems, and is typically accomplished via replication and automatic fail-over in the case of a crash.
主要有MES系统的小型机高可用性技术、数据库应用技术、网络通讯技术分析等。
Mainly small computer of the system of MES can be used for the usability analysis, the database application technique analysis, the network communication technique analysis etc.
医院网络系统的高可用性和数据库的高安全性是其中最为引人关注的问题。
Among the others, high availability of hospital's network system and high security nature of database are mostly concerned about.
随着不间断关键任务需求的不断增强，数据库管理系统这一核心部件的高可用性越来越受到业界的重视。
With the increasing requirement of critical and continuous task, high availability of database management system is paid more attention by industry.
随着不间断关键任务需求的不断增强，数据库管理系统这一核心部件的高可用性越来越受到业界的重视。
With the increasing requirement of critical and continuous task, high availability of database management system is paid more attention by industry.
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