{"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":16,"y":16,"width":288,"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":36,"y":35.7,"width":248,"height":28.6,"fontSize":22,"fontFamily":1,"text":"Durability 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+\nmin.insync.replicas=2\n+\nreplication.factor=3","originalText":"acks=all 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survived:\n✅ 1 broker crash → 2\nreplicas still have\ndata\n✅ 1 disk failure →\ndata on other\nbrokers' disks\n✅ 1 rack failure →\nrack-aware replica\nplacement\n✅ 1 AZ failure →\ncross-AZ replication\n❌ 2 simultaneous\nbroker failures (if\nonly 2 ISR)\n❌ All 3 replicas fail\nsimultaneously\n(catastrophic)","originalText":"Failures survived:\n✅ 1 broker crash → 2\nreplicas still have\ndata\n✅ 1 disk failure →\ndata on other\nbrokers' disks\n✅ 1 rack failure →\nrack-aware replica\nplacement\n✅ 1 AZ failure →\ncross-AZ replication\n❌ 2 simultaneous\nbroker failures (if\nonly 2 ISR)\n❌ All 3 replicas fail\nsimultaneously\n(catastrophic)","textAlign":"left","verticalAlign":"middle","containerId":"shape-4","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":3}},{"angle":0,"strokeColor":"#9180ac","backgroundColor":"#f4effb","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":16,"y":917.2,"width":288,"height":350.6,"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":36,"y":935.2,"width":248,"height":314.6,"fontSize":22,"fontFamily":1,"text":"For disaster\nrecovery:\n→ MirrorMaker 2 for\ncross-region\nreplication\n→ RPO: seconds to\nminutes (async\nreplication lag)\n→ RTO: minutes\n(manual failover to\nDR cluster)","originalText":"For disaster\nrecovery:\n→ MirrorMaker 2 for\ncross-region\nreplication\n→ RPO: seconds to\nminutes (async\nreplication lag)\n→ RTO: minutes\n(manual failover to\nDR cluster)","textAlign":"left","verticalAlign":"middle","containerId":"shape-6","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":4}}],"appState":{"viewBackgroundColor":"#fbfbf8","gridSize":null},"files":{}}