Today's Concept: Distributed Locks
Two servers.
One inventory item.
Without a lock:
Overselling
Duplicate processing
Data inconsistency
With a lock:
Only one server can update the resource at a time.
Used in:
• Payments
• Ticket Booking
• Inventory Management
• Distributed Cron Jobs
Distributed systems scale horizontally.
Distributed Locks keep them consistent.
Harga naik, isi cuma setengah kaleng, ukuran wafer makin tipis. Berat bersih ditulis segede kutu. Cuma 240gr.
Bayar angin doang, beli sampah kaleng yang numpuk di TPA sama bayar logistik bawa kaleng ½ kosong.
Buat semua orang, plis jangan pernah lagi beli produk kayak gini.
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