Optimistic Locking assumes conflicts are rare.
Pessimistic Locking assumes conflicts are inevitable.
The right choice depends on your business requirements, traffic patterns, and acceptable trade-offs.๐ฏ
๐ง๐๐ผ ๐ฝ๐ฒ๐ผ๐ฝ๐น๐ฒ ๐ฐ๐น๐ถ๐ฐ๐ธ โ๐๐ผ๐ผ๐ธ ๐ก๐ผ๐.โ
๐ข๐ป๐น๐ ๐ผ๐ป๐ฒ ๐๐ฒ๐ฎ๐ ๐ถ๐ ๐น๐ฒ๐ณ๐.
Who gets it?
This simple question leads to one of the most important concepts in System Design:
๐ข๐ฝ๐๐ถ๐บ๐ถ๐๐๐ถ๐ฐ ๐๐ผ๐ฐ๐ธ๐ถ๐ป๐ด ๐๐ ๐ฃ๐ฒ๐๐๐ถ๐บ๐ถ๐๐๐ถ๐ฐ ๐๐ผ๐ฐ๐ธ๐ถ๐ป๐ด.
Letโs understand it with a real example.
๐๐ ๐ฎ๐บ๐ฝ๐น๐ฒ ๐ญ
Imagine you are booking a movie ticket on BookMyShow.
Only one seat is left.
๐ฅ๐ฎ๐ต๐๐น ๐ฐ๐น๐ถ๐ฐ๐ธ๐ โ๐๐ผ๐ผ๐ธ ๐ก๐ผ๐.โ
๐๐ ๐๐ต๐ฒ ๐๐ฎ๐บ๐ฒ ๐๐ถ๐บ๐ฒ, ๐ก๐ฒ๐ต๐ฎ ๐ฎ๐น๐๐ผ ๐ฐ๐น๐ถ๐ฐ๐ธ๐ โ๐๐ผ๐ผ๐ธ ๐ก๐ผ๐.โ
Both users saw the seat as available.
Now what?
If both payments succeed, the same seat gets sold twice.
Thatโs a serious business problem.
This is where locking comes in.
๐ข๐ฝ๐๐ถ๐บ๐ถ๐๐๐ถ๐ฐ ๐๐ผ๐ฐ๐ธ๐ถ๐ป๐ด ๐๐ฎ๐๐:
โConflicts are rare. Let users continue.โ
So both users can proceed, but when the booking is finally saved, the system checks if the seat is still available.
If Rahul booked it first, Nehaโs booking will fail.
Simple idea.
No heavy locking.
Better scalability.
Less blocking.
๐๐ ๐ฎ๐บ๐ฝ๐น๐ฒ ๐ฎ
Now imagine IRCTC Tatkal.
Thousands of users.
Limited seats.
Everyone clicking at the same time.
Here, conflicts are not rare.
They are almost guaranteed.
๐ฃ๐ฒ๐๐๐ถ๐บ๐ถ๐๐๐ถ๐ฐ ๐๐ผ๐ฐ๐ธ๐ถ๐ป๐ด ๐๐ฎ๐๐:
โIf someone selected the seat, lock it.โ
No one else can modify it until the booking succeeds or the lock expires.
๐ง๐ต๐ถ๐ ๐ด๐ถ๐๐ฒ๐ ๐บ๐ผ๐ฟ๐ฒ ๐ฐ๐ผ๐ป๐๐ถ๐๐๐ฒ๐ป๐ฐ๐, ๐ฏ๐๐ ๐น๐ฒ๐๐ ๐ฐ๐ผ๐ป๐ฐ๐๐ฟ๐ฟ๐ฒ๐ป๐ฐ๐.
So which one is better?
Wrong question.
The real question is:
How likely are conflicts in your system?
Low conflicts โ Optimistic Locking
High conflicts โ Pessimistic Locking
System Design is not about memorizing fancy terms.
๐๐ ๐ถ๐ ๐ฎ๐ฏ๐ผ๐๐ ๐๐ป๐ฑ๐ฒ๐ฟ๐๐๐ฎ๐ป๐ฑ๐ถ๐ป๐ด ๐๐ต๐ฒ ๐ฝ๐ฟ๐ผ๐ฏ๐น๐ฒ๐บ, ๐ถ๐ฑ๐ฒ๐ป๐๐ถ๐ณ๐๐ถ๐ป๐ด ๐๐ต๐ฒ ๐๐ฟ๐ฎ๐ฑ๐ฒ-๐ผ๐ณ๐ณ, ๐ฎ๐ป๐ฑ ๐ฐ๐ต๐ผ๐ผ๐๐ถ๐ป๐ด ๐๐ต๐ฒ ๐ฟ๐ถ๐ด๐ต๐ ๐ฎ๐ฝ๐ฝ๐ฟ๐ผ๐ฎ๐ฐ๐ต.
Thatโs when concepts stop being interview prep.
Thatโs when true engineering begins. ๐ฏ
Which locking strategy have you used in a real project?
Follow @TechnicalSuneja for more real-world System Design concepts explained through practical examples. ๐
#SystemDesign #SoftwareEngineering #TechInterviews #SoftwareDeveloper #Scalability #CareerGrowth
๐ง๐๐ผ ๐ฝ๐ฒ๐ผ๐ฝ๐น๐ฒ ๐ฐ๐น๐ถ๐ฐ๐ธ โ๐๐ผ๐ผ๐ธ ๐ก๐ผ๐.โ
๐ข๐ป๐น๐ ๐ผ๐ป๐ฒ ๐๐ฒ๐ฎ๐ ๐ถ๐ ๐น๐ฒ๐ณ๐.
Who gets it?
This simple question leads to one of the most important concepts in System Design:
๐ข๐ฝ๐๐ถ๐บ๐ถ๐๐๐ถ๐ฐ ๐๐ผ๐ฐ๐ธ๐ถ๐ป๐ด ๐๐ ๐ฃ๐ฒ๐๐๐ถ๐บ๐ถ๐๐๐ถ๐ฐ ๐๐ผ๐ฐ๐ธ๐ถ๐ป๐ด.
Letโs understand it with a real example.
๐๐ ๐ฎ๐บ๐ฝ๐น๐ฒ ๐ญ
Imagine you are booking a movie ticket on BookMyShow.
Only one seat is left.
๐ฅ๐ฎ๐ต๐๐น ๐ฐ๐น๐ถ๐ฐ๐ธ๐ โ๐๐ผ๐ผ๐ธ ๐ก๐ผ๐.โ
๐๐ ๐๐ต๐ฒ ๐๐ฎ๐บ๐ฒ ๐๐ถ๐บ๐ฒ, ๐ก๐ฒ๐ต๐ฎ ๐ฎ๐น๐๐ผ ๐ฐ๐น๐ถ๐ฐ๐ธ๐ โ๐๐ผ๐ผ๐ธ ๐ก๐ผ๐.โ
Both users saw the seat as available.
Now what?
If both payments succeed, the same seat gets sold twice.
Thatโs a serious business problem.
This is where locking comes in.
๐ข๐ฝ๐๐ถ๐บ๐ถ๐๐๐ถ๐ฐ ๐๐ผ๐ฐ๐ธ๐ถ๐ป๐ด ๐๐ฎ๐๐:
โConflicts are rare. Let users continue.โ
So both users can proceed, but when the booking is finally saved, the system checks if the seat is still available.
If Rahul booked it first, Nehaโs booking will fail.
Simple idea.
No heavy locking.
Better scalability.
Less blocking.
๐๐ ๐ฎ๐บ๐ฝ๐น๐ฒ ๐ฎ
Now imagine IRCTC Tatkal.
Thousands of users.
Limited seats.
Everyone clicking at the same time.
Here, conflicts are not rare.
They are almost guaranteed.
๐ฃ๐ฒ๐๐๐ถ๐บ๐ถ๐๐๐ถ๐ฐ ๐๐ผ๐ฐ๐ธ๐ถ๐ป๐ด ๐๐ฎ๐๐:
โIf someone selected the seat, lock it.โ
No one else can modify it until the booking succeeds or the lock expires.
๐ง๐ต๐ถ๐ ๐ด๐ถ๐๐ฒ๐ ๐บ๐ผ๐ฟ๐ฒ ๐ฐ๐ผ๐ป๐๐ถ๐๐๐ฒ๐ป๐ฐ๐, ๐ฏ๐๐ ๐น๐ฒ๐๐ ๐ฐ๐ผ๐ป๐ฐ๐๐ฟ๐ฟ๐ฒ๐ป๐ฐ๐.
So which one is better?
Wrong question.
The real question is:
How likely are conflicts in your system?
Low conflicts โ Optimistic Locking
High conflicts โ Pessimistic Locking
System Design is not about memorizing fancy terms.
๐๐ ๐ถ๐ ๐ฎ๐ฏ๐ผ๐๐ ๐๐ป๐ฑ๐ฒ๐ฟ๐๐๐ฎ๐ป๐ฑ๐ถ๐ป๐ด ๐๐ต๐ฒ ๐ฝ๐ฟ๐ผ๐ฏ๐น๐ฒ๐บ, ๐ถ๐ฑ๐ฒ๐ป๐๐ถ๐ณ๐๐ถ๐ป๐ด ๐๐ต๐ฒ ๐๐ฟ๐ฎ๐ฑ๐ฒ-๐ผ๐ณ๐ณ, ๐ฎ๐ป๐ฑ ๐ฐ๐ต๐ผ๐ผ๐๐ถ๐ป๐ด ๐๐ต๐ฒ ๐ฟ๐ถ๐ด๐ต๐ ๐ฎ๐ฝ๐ฝ๐ฟ๐ผ๐ฎ๐ฐ๐ต.
Thatโs when concepts stop being interview prep.
Thatโs when true engineering begins. ๐ฏ
Which locking strategy have you used in a real project?
Follow @TechnicalSuneja for more real-world System Design concepts explained through practical examples. ๐
#SystemDesign #SoftwareEngineering #TechInterviews #SoftwareDeveloper #Scalability #CareerGrowth
Dear Freshers!
The start is always hard!
You will lose hope and think, โThis will not work.โ
But mark my words :
Once you pass through this phase, nobody can stop you from thriving.
#Fresher#technicalsuneja
Never forget you can start at 21,
Fail at 25,
Restart at 35,
And finally thrive at 40.
Donโt let the internet rush you.
Someone elseโs success is not your deadline.
Youโre not late.
Youโre just on your time.
#technicalsuneja
Waqt lagega, mushkilein bhi aayengi,
Par woh din zaroor aayega,
Jin haathon mein aaj books hain,
unhi haathon mein kal Offer Letter hoga.
Bas Mehnat par bharosa rakho. โจ๐๐ผ
#technicalsuneja#offerletter
Nobody chooses to be poor or unemployed!
Stop calling people lazy just because your door opened first.
Life doesnโt run on equal starting points.
It runs on different timelines.
Trust the God and his process!
Everyoneโs time comes. โณ
#GodsPlan
Every line of code you write today makes you a better developer tomorrow ๐ฏ
You donโt need to be great to start, but you need to start to be great. โจ
๐ฅ๐ฒ๐๐๐บ๐ฒ: Pro in setting up dev environments
๐ฅ๐ฒ๐ฎ๐น๐ถ๐๐: 3 hours to fix .env file ๐ฉ
We laugh, we cry, we Google again.
Thatโs the developer journey! ๐ฏ๐ฏ
From writing my first โHello Worldโ to building complex apps, every line of code has been a step towards growth.
Remember, the journey from beginner to expert is built on perseverance, curiosity, and endless debugging!
#CodingJourney#KeepCoding
Code often doesnโt work on the first try, but persistence uncovers the pattern. Keep pushing, keep coding, and watch the magic happen! โจ
#KeepCoding#TechLife
Your salary should be based on your skills, not just your past package! ๐ Keep applying, keep leveling upโ someone will pay you what youโre worth! ๐ฐ๐ฅ