网络设备中的软件、配置错误往往会引起网络服务失效或者性能下降。
Network devices may have software faults and configuration faults, which lead to network failure or low performance.
当服务失效的时候，你最好有恰当的流程和工具，在客户发现之前，快速发现问题并恢复。
When that service fails, you better have the proper processes and tools in place to quickly identify the issues and to recover before your customers notice first.
而且此时也是一个很好的时机去深入讨论现有合同中所存在的问题，比如服务失效时的补救措施。
This is a good time to discuss issues in the existing contract that need to be addressed, such as remediation in the event of a lapse of service.
可以将此检查与客户端的最大大小检查(以防止缓冲区过载攻击)一起运行，但由于有人能够使这些措施失效，因此还要在服务器端进行检查。
You can run this check along with a check for maximum size (to avoid buffer overload attacks) on the client side, but because anyone can thwart these measures, you also check on the server side.
失效的文件服务器进程必须与仍在运行的AFS文件服务器重新同步，但是不能添加可能在它断开后保存在本地的新更改。
File server processes that fail have to resynchronize with the still-running AFS file servers, but cannot add new changes that might have been preserved locally after it was cut off.
当发生故障时，例如服务器HADB 1失效，那么连接到HADB1的所有用户都要断开到数据库的连接。
When a failure occurs, for example server HADB1 fails, then all users connected to HADB1 are disconnected from the database.
切分还可以改善可靠性，因为即便一个切分意外失效，其他切分仍然可以服务数据。
Sharding also conceivably improves reliability, because even if one shard unexpectedly fails, others are still able to serve data.
多租户可防止服务在受到端对端事务攻击时失效，这在以后肯能会用到，但我们在本文中不打算介绍这方面的内容。
Multi-tenancy prevents services falling between the cracks for end-to-end transactions that may be required in the future but were not planned for.
好的权变设计要对一切东西负责，包括服务器失效在内。
Great contingency design accounts for everything, including servers going kaput.
因此，即便拥有形式规定的保证，但对于穷人获得银行服务，印度银行体系也还是失效了。
In much of the countryside, usurious moneylenders still hold sway. So, even in its own terms of ensuring that India's poor have access to banking services, the system does not work.
然后从事电脑安全的企业RSA，它的服务器被黑客破坏，这个攻击或许导致RSA大客户LockheedMartin的 电脑防御系统失效。
Then computer security firm RSA had their servers breached, an attack that may have led to the hacking of defence giant Lockheed Martin, an RSA client.
如果不满足基数性(例如，设置为强制，但是没用shortening服务)，那么组件是失效的。
If the cardinality can't be satisfied (for example, it is mandatory there is no shortening service), then the component is deactivated.
在分隔的环境中，如果一台服务器失效，仍然可以继续并连接第二台服务器上的另一个实例。
With separated environments, if one server goes down, the other instance on the second server can still be up and connected.
如果通过两个VIO服务器提供同一组资源，那么当其中一个VIO服务器失效时，VIO客户机LPAR仍然可以正常运行。
By having two VIO servers with the same set of resources, VIO client LPARs can continue functioning unimpaired if something takes one of the VIO servers down.
这些调优不需要修改配置文件，因此在服务器重启之后就失效。
These tunings do not modify the configuration file and are therefore lost when the server restarts.
因此，如果某个正在运行JMS的服务器突然失效了，相同JMS实现的另一台服务器能够处理其负载。
So, if one server running JMS becomes unavailable, another server with the same JMS implementation can handle the load.
在服务器上验证一个用户之前，如果没有首先使现有会话失效，可能会导致所谓的会话固定。
Authenticating a user at the server without first invalidating existing sessions can lead to what is termed session fixation.
当原系统保持联线时，所有系统与联线服务组之间、系统与指定的可用接管目标之间的通讯心跳必须同时失效。
All heartbeat communication between the system with the online service group and the system designated as the potential takeover target must fail simultaneously while the original system stays online.
请注意您不能使一个用于生产环境的服务器上的高速缓存失效，因为这将导致性能障碍。
Please note that you should not disable the caches on servers that will be used in a production environment, because this will result in a performance penalty.
这是一个简单的计算，假定您知道集群的大小和您允许集群作为一个整体仍然“可用”的情况下失效的服务器的数量。
This is a simple calculation that assumes you know the cluster size and the number of servers you are willing to allow fail and still regard the cluster as "available" as a whole.
当缓存完全失效时，所有用户请求被发送到数据库服务器进行处理。
As the cache is completely invalidated, all customer requests are sent to the database server for processing.
在正在执行外部备份操作期间，如果主要服务器失效而日志被暂存在RS次要服务器上，会出现什么情况？
What happens when the primary server fails while logs are staged at RS secondary during external backup operation is in progress?
如果服务不可用了，组件也就失效了；如果一个新服务出现，那么就创建一个新的实例，并将该服务重新绑定。
If the service goes away, the component is deactivated; and if a new service arrives, then a new instance is created and the service re-bound.
也就是说该表显示了当您指定允许失效的服务器数量时集群大小从1到10的冗余容量。
In this case, the table shows the redundant capacity for clusters of size 1 to 10 when the specified number of servers are allowed to fail.
如果失效服务器重新集成到ha群集中(即重新变得可用)，它将停止备用服务器上的数据库，并启动重新集成的服务器上的数据库。
If a failed server reintegrates into the ha cluster (that is, becomes available again), it will stop the database on the standby server and start it on the reintegrated server.
对任何企业和商号的集体管理都会不可避免地导致财务上的失效和服务提供上的贫乏。
Public management of any undertakings and concerns unavoidably results in financial failure and poor service.
这仅仅是集群仍然可用时允许失效的服务器容量数量，表示成总数的百分比。
This is simply the capacity of the number of servers that are allowed to fail and still consider the cluster available, expressed as a percentage of the total.
对于HTTP缓存，在出现可能修改资源的服务器端状态的资源交互时，缓存项将失效。
In the case of HTTP caching, the cache entries are invalidated in case an interaction with the resource occurs that potentially modifies the server side state of the resource.
如果主要服务器失效，而日志暂存于HDR次要服务器上，会出现什么情况？
What happens when primary fails while logs are staged at HDR secondary?
如果主要服务器失效，而日志暂存于HDR次要服务器上，会出现什么情况？
What happens when primary fails while logs are staged at HDR secondary?
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