{"type":"excalidraw","version":2,"source":"https://AwesomeSystemDesign.dev","elements":[{"angle":0,"strokeColor":"#6577aa","backgroundColor":"#eef1fc","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-1"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-1"}],"updated":0,"link":null,"locked":false,"id":"shape-0","type":"rectangle","seed":41,"x":36,"y":32,"width":192,"height":129.60000000000002,"customData":{"revealStep":1}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-1"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-1","type":"text","seed":114,"x":56,"y":50.00000000000001,"width":152,"height":93.60000000000001,"fontSize":18,"fontFamily":1,"text":"orders\nid=789\nstatus=shipped\ntotal=$59.98","originalText":"orders\nid=789\nstatus=shipped\ntotal=$59.98","textAlign":"center","verticalAlign":"middle","containerId":"shape-0","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":1}},{"angle":0,"strokeColor":"#628572","backgroundColor":"#edf5ee","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-2"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-3"}],"updated":0,"link":null,"locked":false,"id":"shape-2","type":"rectangle","seed":187,"x":268,"y":32,"width":390,"height":316.8,"customData":{"revealStep":2}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-2"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-3","type":"text","seed":260,"x":288,"y":50,"width":350,"height":280.8,"fontSize":18,"fontFamily":1,"text":"Event Stream: order-789\n\n#1 OrderPlaced { items: [...], total:\n$79.97 }\n#2 ItemRemoved { sku: SKU-003,\namount: -$19.99 }\n#3 CouponApplied { code: SAVE10,\ndiscount: -$5.99 }\n#4 PaymentCharged { amount:\n$53.99, method: card }\n#5 OrderShipped { carrier: UPS,\ntracking: 1Z... }","originalText":"Event Stream: order-789\n\n#1 OrderPlaced { items: [...], total:\n$79.97 }\n#2 ItemRemoved { sku: SKU-003,\namount: -$19.99 }\n#3 CouponApplied { code: SAVE10,\ndiscount: -$5.99 }\n#4 PaymentCharged { amount:\n$53.99, method: card }\n#5 OrderShipped { carrier: UPS,\ntracking: 1Z... }","textAlign":"center","verticalAlign":"middle","containerId":"shape-2","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":2}},{"angle":0,"strokeColor":"#a68a53","backgroundColor":"#fff7e6","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-3"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-5"}],"updated":0,"link":null,"locked":false,"id":"shape-4","type":"rectangle","seed":333,"x":36,"y":388.8,"width":542.3255200000001,"height":610.6,"customData":{"revealStep":3}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-3"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-5","type":"text","seed":406,"x":56,"y":406.8,"width":502.3255200000001,"height":574.6,"fontSize":17,"fontFamily":1,"text":"Traditional CRUD vs Event Sourcing\n\nCRUD (current state only):\n\nEvent Sourced (full history):\n\nCurrent state = replay all events:\nStart: empty order\nApply #1: order with 3 items, total=$79.97\nApply #2: 2 items, total=$59.98\nApply #3: total=$53.99\nApply #4: status=paid\nApply #5: status=shipped\n\nBenefits:\n✅ Complete audit trail (every state change recorded)\n✅ Time-travel debugging (\"what was the state at 3pm?\")\n✅ Event replay (rebuild any read model from scratch)\n✅ Natural fit for event-driven architecture\n✅ No data loss (events are immutable facts)\n\nCosts:\n❌ More storage (events accumulate forever)\n❌ Slower reads (must replay events or use snapshots)\n❌ Schema evolution of old events is tricky\n❌ Higher complexity (not needed for all domains)","originalText":"Traditional CRUD vs Event Sourcing\n\nCRUD (current state only):\n\nEvent Sourced (full history):\n\nCurrent state = replay all events:\nStart: empty order\nApply #1: order with 3 items, total=$79.97\nApply #2: 2 items, total=$59.98\nApply #3: total=$53.99\nApply #4: status=paid\nApply #5: status=shipped\n\nBenefits:\n✅ Complete audit trail (every state change recorded)\n✅ Time-travel debugging (\"what was the state at 3pm?\")\n✅ Event replay (rebuild any read model from scratch)\n✅ Natural fit for event-driven architecture\n✅ No data loss (events are immutable facts)\n\nCosts:\n❌ More storage (events accumulate forever)\n❌ Slower reads (must replay events or use snapshots)\n❌ Schema evolution of old events is tricky\n❌ Higher complexity (not needed for all domains)","textAlign":"left","verticalAlign":"middle","containerId":"shape-4","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":3}}],"appState":{"viewBackgroundColor":"#fbfbf8","gridSize":null},"files":{}}