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Need to shorten long url to short url
adding custom alias
adding expiration time
redirecting short urls
high availability
low latency about ~200ms
should be able to scale to high amount of users like 50m dau
Estimate the scale of the system you are going to design...
50million DAU and 1B urls
Define what APIs are expected from the system...
post request for sending long url along with alias and expiration time
{
long url: https://skjbgwsfgrnlawng/wfgwqng/wqgqwg
alias: afafaeg
expiration time: 1 day
}
get short url
{
short url: https://tinyurl/adgagsrh
redirect
}
user_id
longurl
shorturl
alias
expiration date
You should identify enough components that are needed to solve the actual problem from end to end. Also remember to draw a block diagram using the diagramming tool to augment your design. If you are unfamiliar with the tool, you can simply describe your design to the chat bot and ask it to generate a starter diagram for you to modify...
Explain how the request flows from end to end in your high level design. Also you could draw a sequence diagram using the diagramming tool to enhance your explanation...
Dig deeper into 2-3 components and explain in detail how they work. For example, how well does each component scale? Any relevant algorithm or data structure you like to use for a component? Also you could draw a diagram using the diagramming tool to enhance your design...
Explain any trade offs you have made and why you made certain tech choices...
Try to discuss as many failure scenarios/bottlenecks as possible.
What are some future improvements you would make? How would you mitigate the failure scenario(s) you described above?