Zijun Zhou
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RDBMS Must Know RDBMS Must Know
Conceptskey 1 attribute (col) more than 1 attributes (col) = composite/compound key composite/compound key a key that
2020-03-01 system design
tech one pager database
How to Build a Data Processing Pipeline How to Build a Data Processing Pipeline
What is data processing pipeline? How does data processing pipeline architecture look like? What is Lambda Architeture?
2020-02-26 system design
tech one pager architecture
Design Twitter Design Twitter
RequirementsProduct Requirements Post tweet Timeline User Timeline Home Timeline User Follow RelationExtra: Trends Sea
2020-02-13 system design
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Back-of-the-envelope Calculation Must Know Numbers Back-of-the-envelope Calculation Must Know Numbers
CalculationDefine estimate numbers: #users #operations/events data size per op/event General formulas: Number of opera
2020-02-12 system design
tech one pager 内功
System Design Interview Must Know System Design Interview Must Know
Interview Thought Process End Goal & Main Service Definition Confirm Requirements Product Requirements Engineering R
2020-02-09 system design
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