标题: 95th percentile 是什么意思？ [打印本页] 作者: gdtv 时间: 2009-11-10 00:21 标题: 95th percentile 是什么意思？ 95th percentile refers to a method of bandwidth tallying, most commonly associated with colocation. In 95th percentile billing, the customer is not charged for the top 5% of bandwidth used in any given month.
如果要一个月的就是把一个月的拿来进行排列就行了。
作者: pigicoffee 时间: 2009-11-10 10:12
The 95th percentile is the smallest number that is greater than 95% of the numbers in a given set. The reason this statistic is so useful in measuring data throughput is that it gives a very accurate picture of the use and cost of the bandwidth. We take a snapshot of your bandwidth usage every 5 minutes throughout the billing period (usually 30 days). These 8,640 snapshots are then used to create the 'set' mentioned above. We then employ the 95th percentile rule to calculate your bandwidth usage and then bill accordingly if necessary.
The advantage to you as the customer is that you get the performance of a high-speed connection, while paying only for actual usage.
In the example above, we would take out the higher 5% of the Max In/Max Out bandwidth measurement from the monthly MRTG graph which is 884 Kbps.
We would then take the bottom 94% of the remaining samples taken, in this example that is 337 Kbps.
Using this method each 1,000 Kbps is 1 Mbs per month. The percentage of bandwidth per Mbs would be x/1000 or 337/1000 = .337 Mbs or 107 Gb per month.作者: lemss 时间: 2009-11-10 10:20 标题: 回复 2# 的帖子 那也太垃圾了吧作者: pigicoffee 时间: 2009-11-10 10:21
我没有说明白看我后来的解释作者: cpuer 时间: 2009-11-10 10:26 标题: 回复 7# 的帖子 我在四楼给中文解释了，以服务器实图为例了。作者: gdtv 时间: 2009-11-10 11:44
看了还是有点不明白，是不是说：95%的时间里带宽不能超过2mbps ?
