Today we continue discussing the best practice from storage engineering :

469) Storage products are tested for size and usage under all circumstances. These can be fine grained or aggregated and can be queried at different scopes and levels.

470) Storage product is generally the source of truth for all upstream data sources and workflows.

471) Storage products manage to be the source of truth even with different consistency models. They just need to meet their usages.

472) Storage products have evolved from being purely disk based solutions to compute and network embracing software defined stacks. Consequently they are better able to be tested but the complexity  increases.

473) Storage products are also prone to increasing their test matrix with new devices such as solid state drive and emerging trends such as IoT

474) Storage products have to be limitless for their customers but they cannot say how they will be used. They will frequently run into usages where customers use them inappropriately and go against their internal limits such as the number of policies that can be applied to their organizational units.


#codingexercise
Friends Pairing problem:
Given n friends, each one can remain single or can be paired up with some other friend. Each friend can be paired only once so ordering is irrelevant
The total number of ways in which the friends can be paired is given by;
Int GetPairs(int n)
{
If (n <=2) return n;
Return GetPairs(n-1) + GetPairs(n-2)*(n-1);
}