在随需应变的企业，业务用户不希望在其应用程序访问此数据时遇到缺乏可用性或发生故障的情况。
In an on demand shop, business users do not want to encounter lack of availability or failure in their applications' accessing this data.
该员工必须能够访问另外某个人管理的故障通知单系统。
This employee must get access to a trouble ticket system that someone else manages.
可见性故障是由数据争夺引起的—访问共享变量时不能正确同步。
Visibility failures are created by data RACES - failure to properly synchronize when accessing Shared variables.
两个系统都有数据库数据的副本，或者都可以访问同一个副本，当检测到故障时，就会进行故障转移。
Two systems have copies of the database data or access to a single copy, and when a failure is detected, a failover takes place.
故障转移服务器设置好之后，代理就可以访问它(只读)。
Once the failover server is set up, the agent can access it (read-only).
当操作者使用手动对等恢复引发对出现故障的服务器的对等恢复处理时，可对恢复日志进行强制访问。
When using manual peer recovery, this access is enforced by the operator who only triggers peer recovery processing for servers that are unavailable.
主动成员上尝试访问故障成员上锁定数据的应用程序将短暂地处于锁定等待状态，默认情况下不会接受任何错误。
Applications on active members trying to access the locked data on the failing member will be briefly in a lock-wait state, and by default will not receive any errors.
对于用户来说，幸运的是，这些故障一向是短暂的，而且往往没有破坏通过IMAP的访问。
Fortunately for users, these outages have consistently been brief, and have not tended to disrupt access via IMAP.
解决这个问题的一种方法是使用全冗余路径来访问外部SAN(存储区域网)设备—通过这种方式，可以减少因存储子系统访问问题导致的故障。
One way to counter this is by using a fully redundant path to access external SAN (storage area network) devices-in this way, you can reduce failures caused by storage subsystem access problems.
PowerHA使用网络探测和诊断故障以及为客户机提供高可用性的应用程序访问能力。
PowerHA USES networks to detect and diagnose failures, as well as providing clients with highly available access to applications.
您还需要编写和运行两个小客户端应用程序，以访问objectgrid中的数据，并介绍此配置如何从ObjectGrid服务器故障中恢复。
You will also write and run two small client applications to access data in the ObjectGrid and show how this configuration can recover from the failure of an ObjectGrid server.
此时正值oscon会议召开，故障导致该开源数据库系统的六百多万名用户无一能够访问源代码、跟踪bug和网站论坛。
Just in time for OSCON, the failure leaves all six million or more users of the open source database system unable to access source code, bug tracking, or discussion forums on the site.
如果硬件能够支持的话，可以用dm_multipath通过不同的通道访问同一设备，这样的话在一个通道发生故障时，可以转移到另一个通道。
For hardware that supports it, it's possible to use dm_multipath for using different channels to access a single device, having a fail-over possibility in case a channel goes down.
如果已经设置好故障转移服务器，那么再次在主机的下列目录中的agent. conf文件中添加访问点。
If the failover servers are set up, enroll the access points again in the agent.conf files on the following directories of the host.
故障转移对访问 Web页的客户机来说是透明的。
The failover is transparent to the client accessing the Web pages.
如果facebook平台正在维护，你无法访问上边的朋友，更不用说如果出现永久故障！
You can't access your friends on facebook if the platform is down for maintenance, let alone if it goes down permanently!
读操作是使用本地存储执行的(除非本地磁盘发生故障，那时通过辅助节点访问辅助存储)。
Read operations are performed using local storage (unless the local disk has failed, at which point the secondary storage is accessed through the secondary node).
我们还可以对原始磁盘进行 并发访问，甚至可以进一步减少故障转移时间。
We can also have the concurrent access on for the raw disks, and that even further reduces failover time.
如果有任何成员发生故障，仍可从其他主动成员访问整个数据集。
If any member fails, the full set of data is still accessible from the other active members.
为了获得更快的故障转移时间，最佳配置是使用dms表空间和原始设备，甚至最好允许对磁盘的并发访问。
For faster failover time the best configuration is to use DMS tablespaces and raw devices, and even better allow concurrent access to the disks.
因此，您将使用并发访问以获得更快的故障转移时间。
Therefore, you should use concurrent access for faster failover time.
如果某台服务器出现故障，其上的数据在服务器恢复之前都不能访问。
If a server fails, the data it holds is inaccessible until the server recovers.
如果因为磁盘驱动器或RAID故障而造成数据库不可访问，就不能进行故障转移。
If the database is inaccessible because the disk drive or RAID set is down, failover cannot occur.
在以下情况下可能重新设置此设置：故障转移、首选服务器更改、缓存文件不可访问、复制间隔错误，或者在其他任何需要与新的服务器邮件文件进行同步时。
This setting can be reset by failover, preferred server change, unreachable cache file, replication interval setback, or any other time you need to synch with a new server mail file.
但是如果错误确实发生了(因为故障在所难免)，则应该验证它们的可访问性和完整性，并设计出增量计划(incremental plan)来修复它们，使您的服务器重新正常运行。
But when they do occur-because failure is inevitable-validate their accessibility and integrity, and come up with an incremental plan for fixing them and getting your server fully running once more.
您学习了当存储路径出现故障或者存储基础设施进行维护时，如何使用多路访问显著增加xen虚拟机的正常运行时间。
You've learned how multipath access can be used to dramatically increase the uptime of Xen virtual machines in the event of storage path failure or storage infrastructure maintenance.
熟悉IBMSupportAssistantV3.0 的用户将会对改进的GUI体验、产品新闻源访问、案例管理功能和内置向导式故障排除程序大加赞赏。
Users familiar with IBM Support Assistant V3.0 will appreciate the improved GUI experience, access to product news feeds, case management features, and built-in guided troubleshooter.
第3个故障组是解决磁盘仲裁问题所必需的，以便如果存储的其中一半离线之后，磁盘仲裁能立即发挥作用且文件系统也能保持总可以被访问。
The third failure group is required to solve disk quorum issues so that should either half of the storage go offline, disk quorum is satisfied, and the file system remains accessible.
在这种模式下，多个Power ha节点都可以访问共享卷组，这会加快发生节点故障时的故障转移(磁盘接管)。
In this mode, the Shared volume groups are accessible by multiple PowerHA nodes, which results in faster failover (disk takeover) in the event of a node failure.
在这种模式下，多个Power ha节点都可以访问共享卷组，这会加快发生节点故障时的故障转移(磁盘接管)。
In this mode, the Shared volume groups are accessible by multiple PowerHA nodes, which results in faster failover (disk takeover) in the event of a node failure.
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