上图清晰的解释了一次 'one' time between failures,因此 Mean time between failures 计算方式是 :所有系统可服务的时间/失败的次数。 这两个指标,表示了理论平均情况下,系统可提供服务的时间和不可提供服务的时间,因此 availability = MTBF/(MTBF + MTTR) 为了达到上述可用性和持久性和持久性的指标,工程师在设...
可用性:定义为系统正常运行的时间占比,其计算公式是:Availability = MTBF/(MTBF +MTTR)。有趣的是,可用性只涉及“可修复故障”,为什么呢?对于不可修复的故障来说,只要坏了就废弃了,就不存在什么正常运行时间的比例这个说法了。 可用性的公式比较简单,这个公式背后蕴含的信息不少,我们来看几个有趣的问题: ...
计算公式A=MTBF/(MTBF+MTTR)(这里A指可用性Availability);MTBF已知为2,000,000小时(这里数字为参考,与实际值在一个数量级),MTTR的取值定义为1小时(因为 swp0012018-03-05 13:10:23 MTBF测试周期10万小时,这是什么概念呢? 的MTBF时间,是怎么测出来的?都是一个谜!安博检测邹浩根在这里等你!MTBF并不是在实际...
So, while MTTR impacts availability, MTBF measures availability and reliability. The higher the figure of the MTBF, the longer the system will likely run before failing. Why is MTBF helpful? Because equipment failure can be expensive and damaging to the organization, you need to be on top of...
The availability of a redundant system requiring m out of n units to be operational represents a basic and elementary result within reliability engineering. The corresponding mean time between system failures (MTBF) and mean time of system restoral (MTTR) are less commonly known since these ...
Availability: Similar to reliability, this measures the likelihood that an asset will work when you need it to. You’ll seemaintainabilityexpressed as a percentage of uptime across a given period. Maintainability: Measured primarily through MTTR, maintainability describes how easily your team can perfo...
可用性的分类在很大程度上取决于在计算可用性时所用的宕机时间(Downtime,即停工期)的类型以及该可用性与时间的关系,分为固有可用性(Inherent Availability),可达可用性(Achieved Availability)和使用可用性(Operational Availability)。区别如下: 固有可用性Ai——停机时间仅考虑修复性维修,不包括预防性维修(Preventive ...
The availability of a redundant system requiring m out of n units to be operational represents a basic and elementary result within reliability engineering. The corresponding mean time between system failures (MTBF) and mean time of system restoral (MTTR) are less commonly known since these results...
一台计算机具有比较高的“可用性”(Availability),其含义是指( )。 A.它的MTBF比较低,MTTR比较高B.它的MTBF比
通常用平均修复时间(MTTR)表示。故障次数少但故障后修复时间长,或故障次数多每次故障修复时间短,这两种情况都是用户无法接受的。最理想的情况是MTBF值大,而MTTR值小,即可靠性高,一般不出现故障,一旦出现故障能马上修复 The usability is refers in some specific time section, the system can the normal work ...