Which of the following retains the information it's storing when the system power is turned off?

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Hi everyone, today I want to share a method to make capacity planning easier. Remember those simultaneous equations you learnt at school ? Well, there are actual uses for them in IT.

Linear Programming, also sometimes called linear optimisation, involves maximising or minimising a linear objective function, subject to a set of linear inequality or equality constraints. It has great applications in the field of operations management but can be used to solve a range of problems.



A simple example follows.

Suppose that you want to buy new servers to replace outdated ones and have two options to choose from. There is a standard model which costs $400, uses 300W of power, takes up 2U, and can handle 1000 hits/min. There is also a performance model, which costs $1600, uses 500W of power, but takes up only 1U, and can handle 2000 hits/min. With a budget of $36,800, 44U of rack space and 12,200W of power available, how many units of each model should you purchase in order to maximize the number of hits served per minute?

The code for solving the problem is on GitHub. https://github.com/vasoov/lp-server-hosting-refresh





Comments welcome.

