{"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":358.97944,"height":68,"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":54.3,"width":318.97944,"height":23.400000000000002,"fontSize":18,"fontFamily":1,"text":"D0 | D1 | D2 | D3 | D4 | D5 | D6","originalText":"D0 | D1 | D2 | D3 | D4 | D5 | D6","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":434.97944,"y":32,"width":350.16448,"height":68,"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":454.97944,"y":54.3,"width":310.16448,"height":23.400000000000002,"fontSize":18,"fontFamily":1,"text":"D7 | D8 | D9 | P0 | P1 | P2 | P3","originalText":"D7 | D8 | D9 | P0 | P1 | P2 | P3","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":140,"width":575.12192,"height":345.40000000000003,"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":158,"width":535.12192,"height":309.40000000000003,"fontSize":17,"fontFamily":1,"text":"Erasure Coding (e.g., RS(10,4) — 10 data + 4 parity)\n\nObject \"video.mp4\" (640 MB):\n\nSplit into 10 data chunks (64 MB each)\nCompute 4 parity chunks (64 MB each)\nTotal: 14 chunks distributed across 14 different nodes\n\nCan tolerate ANY 4 chunk losses and still reconstruct\n→ 14 nodes, need only 10 to survive\n\nDurability: vastly exceeds 11 nines (mathematical guarantee)\n\nStorage overhead: 14/10 = 1.4× (40% overhead vs 200%)","originalText":"Erasure Coding (e.g., RS(10,4) — 10 data + 4 parity)\n\nObject \"video.mp4\" (640 MB):\n\nSplit into 10 data chunks (64 MB each)\nCompute 4 parity chunks (64 MB each)\nTotal: 14 chunks distributed across 14 different nodes\n\nCan tolerate ANY 4 chunk losses and still reconstruct\n→ 14 nodes, need only 10 to survive\n\nDurability: vastly exceeds 11 nines (mathematical guarantee)\n\nStorage overhead: 14/10 = 1.4× (40% overhead vs 200%)","textAlign":"left","verticalAlign":"middle","containerId":"shape-4","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":3}},{"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-4"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-7"}],"updated":0,"link":null,"locked":false,"id":"shape-6","type":"rectangle","seed":479,"x":36,"y":509.40000000000003,"width":514.71888,"height":124.4,"customData":{"revealStep":4}},{"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-4"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-7","type":"text","seed":552,"x":56,"y":527.4000000000001,"width":474.71888,"height":88.4,"fontSize":17,"fontFamily":1,"text":"Comparison at 100 EB scale:\nReplication (3×): 300 EB raw storage needed\nErasure coding (1.4×): 140 EB raw storage needed\nSavings: 160 EB = millions of HDDs = billions of $$$","originalText":"Comparison at 100 EB scale:\nReplication (3×): 300 EB raw storage needed\nErasure coding (1.4×): 140 EB raw storage needed\nSavings: 160 EB = millions of HDDs = billions of $$$","textAlign":"left","verticalAlign":"middle","containerId":"shape-6","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":4}}],"appState":{"viewBackgroundColor":"#fbfbf8","gridSize":null},"files":{}}