它能在高可用性集群的服务器停机时维护用户连接。
It can service the user connections while the servers of the high availability cluster are brought down.
本文主要关注其中一个特性：在线升级高可用性集群。
This article focuses on one of those features: upgrading a high availability cluster while it is online.
现在可以移除临时用于支持您的高可用性集群升级的ER。
You can now remove er which was temporarily used to facilitate the upgrade of your high availability cluster.
高可用性集群设置在11.50 .xC 7服务器版本上。
The high availability cluster is set up on 11.50.xc7 server version.
除此之外，DB 2安装程序还可以自动地配置这个高可用性集群。
In addition to this, the DB2 installation program can automatically configure this high availability cluster.
图2展示了sqlhosts文件中添加了逻辑组的高可用性集群。
Figure 2 shows the high availability cluster after adding logical groups in the sqlhosts file.
如上一小节所述，可以使用不同的选项来执行您的高可用性集群的滚动升级。
As discussed in the previous section, different options are available for performing a rolling upgrade of your high availability cluster.
高可用性集群要求主服务器和辅助服务器运行相同版本的Informix。
The high availability cluster requires that the primary and the secondary servers be running the same versions of Informix.
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.
IDS引入了两种新的可加入到高可用性集群的辅助服务器，从而扩展了业务连续性。
IDS extends business continuity with the introduction of two new types of secondary servers that can participate in high availability clusters.
现在，借助滚动更新功能和本文描述的一个选项，您就能轻松在线升级您的高可用性集群。
Now with rolling upgrade and using one of the options described in this article, you can easily upgrade your high availability clusters online.
高可用性集群配置是默认的配置，当创建单元中的应用程序服务器集群时将其创建。
The high availability cluster configuration is the default configuration created when a cluster of application servers in a cell is created.
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.
这可能是DB2Express-C的最大限制之一（以及不能为服务器建立高可用性集群）。
This is perhaps one of the biggest restrictions with DB2 Express-C (in addition to the inability to cluster these servers for high availability).
每个LPAR都可以用来运行通常在单独的计算机、高可用性集群或灾难恢复环境中运行的任何应用程序。
Each LPAR may be used to host any application that normally runs on a standalone machine, high availability cluster, or in a disaster recovery environment.
Informix GrowthEdition支持两个任何类型的高可用性集群辅助节点。
Informix Growth Edition supports up to two high-availability cluster secondary nodes of any type.
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.
如果高可用性集群中某一个服务器出现故障，那么集群软件就会将工作负载转移到warm备用数据服务器。
If one of the servers in the high availability cluster fails, then the clustering software transfers the workload to the warm standby server.
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.
我们的解决方案将采用一种算法（协议）来适应高可用性集群中应用程序（或节点）的第一次和第二次故障。
Our solution was to come up an algorithm (protocol) to accommodate a first and second failure of application (or nodes) within the highly available cluster.
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.
DB 2包含一组内置集群服务，它使您能够为两个服务器建立高可用性集群，甚至自动化HADR解决方案的故障转移。
DB2 includes a set of built-in clustering services that give you the ability to cluster together two servers for high availability and even automate the fail-over of an HADR solution.
高可用性集群设置在11.50 .xC 7服务器版本上，包含一个主服务器、一个SDS、一个RSS和一个HDR。
The high availability cluster is set up on 11.50.xc7 server version and contains a primary, one SDS, one RSS, and an HDR.
接下来的小节将详细介绍对于高可用性集群中不同的DB2服务器许可方式，您应该知道的一些许可方面的考虑事项。
The following section details the licensing considerations you should be aware of depending on how your DB2 server is licensed.
有了此版本，全部高可用性集群、ER和网格功能都是可用的，包括无限 ER 和网格节点以及所有高可用性集群辅助实例类型。
With this edition, full high-availability cluster, ER, and grid functionality is available, including unlimited ER and grid nodes and all high-availability cluster secondary instance types.
如果高可用性集群中的某一个服务器出现故障，那么集群软件将把出故障的服务器上的工作负载转移到集群中仍然正常的一个服务器上。
If one of the servers in the high availability cluster was to fail, then clustering software would transfer the failed server's workload to a surviving server in the cluster.
对于这个示例，一个高可用性集群设置在一个Informix 11.50 .XC 7服务器版本上，它包含一个主服务器、一个SDS、一个RSS和一个HDR。
For this example, a high availability cluster is set up on an Informix 11.50.xc7 server version. It contains a primary, one SDS, one RSS, and an HDR.
例如，可以在云中建立一个DB 2HADR(高可用性灾难恢复)集群。
For example, a DB2 HADR (High Availability Disaster Recovery) cluster can be set up in the cloud.
本系列的第1部分介绍了多实例队列管理器和多实例代理的一些基础知识，描述了“主动-被动”高可用性技术和水平集群。
Part 1 in this article series covered the basics of multi-instance queue managers and multi-instance brokers, and described the active-passive technique of high availability and horizontal clustering.
为集群、高可用性和关联映射提供了代理支持，类似于传统的边缘组件对HTML请求的支持。
Proxy support is provided for clustering, high availability, and affinity mapping, analogous to the traditional edge component support for HTML requests.
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