This article is
first one from the series of articles dedicated to system design
interviews. Here i am going to present the base scenario to consider
before starting to solve system design problems.

**Questions to ask?**

1) what is the
number of requests a website will recieve in a day/month/second? 2) what is the
amount of memory a website will deal in a day/month/second? 3) what is the
number of servers that can accomodate these requests?

To answer this ,
first we need to remember the below numbers:-

1 million = 10 lakh
= 1000000 = 10^6
1 billion = 1000
million = 10^9

1 KB = 1024 B = 10^31 MB= 10^6 = 1024 KB
1 GB= 10^9 = 1024 MB1 TB = 10^12 = 1024
GB

Memory we need to
see in BytesRequests we need to
see in numbers

**example :-
**

suppose a website
recieves 100M requests every month then:-

requests per day =
request per month /24 = 416700 requests requests per second
= requests per day / (24*3600) = 4.8 requests per second

**memory:-**

if we take 20:80
principal where 20 percent is write and 80 percent is …

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