QPS = req / sec = requests / sec
[QPS manner calculated PV] and the machine
QPS statistical methods [http_load generally used for statistical]
QPS = Total / (total number of processes * Request Time) request
QPS: the number of successful requests per second, a single process server
PV single server per day
Equation 1: Total daily PV = QPS * 3600 * 6
Equation 2: total daily PV = QPS * 3600 * 8
Server computing
The number of servers = ceil (total daily PV / single server total daily PV)
[Peak machine and QPS formula]
Principle: 80% of the daily visit focused on the 20% of the time, this time called the peak time 20%
Formula :( Total PV * 80%) / (number of seconds * 20%) = peak time requests per day (QPS) per second
Machine: QPS second peak time / single machine QPS = desired machine
Q: every day on a single machine, the machine number of QPS needs 300w PV?
A :( 3000000 * 0.8) / (86400 * 0.2) = 139 (QPS)
Q: If a machine QPS is 58, need several machines to support?
A: 139/58 = 3