diff --git a/doc/download_sequence_diagram.drawio b/doc/download_sequence_diagram.drawio
index 33e679b..2014841 100644
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text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 98px; height: 1px; padding-top: 20px; margin-left: 351px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Verdana; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Application3</div></div></div></foreignObject><text x="400" y="24" fill="#000000" font-family="Verdana" font-size="12px" text-anchor="middle">Application3</text></switch></g><rect x="520" y="0" width="100" height="40" rx="6" ry="6" fill="#ffffff" stroke="#000000" pointer-events="all"/><path d="M 570 40 L 570 960" fill="none" stroke="#000000" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 98px; height: 1px; padding-top: 20px; margin-left: 521px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Verdana; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Tracker</div></div></div></foreignObject><text x="570" y="24" fill="#000000" font-family="Verdana" font-size="12px" text-anchor="middle">Tracker</text></switch></g><path d="M 49.5 110 L 300 110 Q 310 110 320 110 L 561.38 110" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 568.38 110 L 561.38 113.5 L 561.38 106.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 97px; margin-left: 330px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">DISCOVER REQUEST(file1)</div></div></div></foreignObject><text x="330" y="97" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">DISCOVER REQUES...</text></switch></g><path d="M 569.5 150 L 320 150 Q 310 150 300 150 L 57.62 150" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 50.62 150 L 57.62 146.5 L 57.62 153.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 147px; margin-left: 310px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">DISCOVER RESPONSE (file1, Application2, Application3)</div></div></div></foreignObject><text x="310" y="147" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">DISCOVER RESPON...</text></switch></g><path d="M 30 50 L 596 50 L 610 64 L 610 80 L 30 80 L 30 50 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 596 50 L 596 64 L 610 64" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-start; justify-content: unsafe center; width: 578px; height: 1px; padding-top: 51px; margin-left: 31px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div align="center">Applications are all already registered successfully into tracker.</div><div align="center">Lets start a download of file1 from Application1.</div></div></div></div></foreignObject><text x="320" y="63" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Applications are all already registered successfully into tracker....</text></switch></g><path d="M 50 210 L 211.38 210" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 218.38 210 L 211.38 213.5 L 211.38 206.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 207px; margin-left: 135px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">SIZE REQUEST(file1)</div></div></div></foreignObject><text x="135" y="207" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">SIZE REQUEST(fi...</text></switch></g><path d="M 220 240 L 57.62 240" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 50.62 240 L 57.62 236.5 L 57.62 243.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 237px; margin-left: 135px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">SIZE RESPONSE(file1, sizeof(file1))</div></div></div></foreignObject><text x="135" y="237" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">SIZE RESPONSE(f...</text></switch></g><path d="M 50 280 L 211.38 280" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 218.38 280 L 211.38 283.5 L 211.38 276.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 277px; margin-left: 140px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">HASH REQUEST(file1, "SHA512")</div></div></div></foreignObject><text x="140" y="277" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">HASH REQUEST(fi...</text></switch></g><path d="M 220 310 L 57.62 310" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 50.62 310 L 57.62 306.5 L 57.62 313.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 307px; margin-left: 135px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">HASH RESPONSE(file1, sha512(file1))</div></div></div></foreignObject><text x="135" y="307" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">HASH RESPONSE(f...</text></switch></g><path d="M 50 340 L 391.38 340" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 398.38 340 L 391.38 343.5 L 391.38 336.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 337px; margin-left: 225px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">HASH REQUEST(file1, "SHA512")</div></div></div></foreignObject><text x="225" y="337" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">HASH REQUEST(fi...</text></switch></g><path d="M 400 370 L 57.62 370" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 50.62 370 L 57.62 366.5 L 57.62 373.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 367px; margin-left: 225px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">HASH RESPONSE(file1, sha512(file1))</div></div></div></foreignObject><text x="225" y="367" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">HASH RESPONSE(f...</text></switch></g><path d="M 20 385 L 586 385 L 600 399 L 600 440 L 20 440 L 20 385 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 586 385 L 586 399 L 600 399" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-start; justify-content: unsafe center; width: 578px; height: 1px; padding-top: 386px; margin-left: 21px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div>Application1 is requesting hashsum from each application to ensure applications have</div><div>the same file, but an improvement could be to register this sum in the tracker, and ask only the tracker once instead of asking each application.<br /></div></div></div></div></foreignObject><text x="310" y="398" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Application1 is requesting hashsum from each application to ensure applications have...</text></switch></g><path d="M 50 460 L 211.38 460" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 218.38 460 L 211.38 463.5 L 211.38 456.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 457px; margin-left: 135px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">LOAD PART(0, 512, file1)</div></div></div></foreignObject><text x="135" y="457" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">LOAD PART(0, 51...</text></switch></g><path d="M 220 490 L 561.38 490" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 568.38 490 L 561.38 493.5 L 561.38 486.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 487px; margin-left: 395px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">RATIO REQUEST(Application1)</div></div></div></foreignObject><text x="395" y="487" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">RATIO REQUE...</text></switch></g><path d="M 569.5 520 L 430 520 Q 420 520 410 520 L 227.62 520" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 220.62 520 L 227.62 516.5 L 227.62 523.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 517px; margin-left: 395px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">RATIO RESPONSE(Application1, upratio, downratio)</div></div></div></foreignObject><text x="395" y="517" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">RATIO RESPONSE(...</text></switch></g><path d="M 20 540 L 586 540 L 600 554 L 600 610 L 20 610 L 20 540 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 586 540 L 586 554 L 600 554" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-start; justify-content: unsafe center; width: 578px; height: 1px; padding-top: 541px; margin-left: 21px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div>Application2 will cache the ratio a few seconds, to avoid asking the tracker</div><div>on each LOAD PART.</div><div>Here, based on this ratio, Application2 randomly decide to send a DENY to punish Application1. This filepart will be asked again later, and possibly to an other application.<br /></div></div></div></div></foreignObject><text x="310" y="553" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Application2 will cache the ratio a few seconds, to avoid asking the tracker...</text></switch></g><path d="M 219.5 640 L 120 640 Q 110 640 100 640 L 57.62 640" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 50.62 640 L 57.62 636.5 L 57.62 643.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 637px; margin-left: 141px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">DENY(file1, 0)</div></div></div></foreignObject><text x="141" y="637" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">DENY(file1, 0)</text></switch></g><path d="M 49.5 670 L 170 670 Q 180 670 190 670 L 391.38 670" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 398.38 670 L 391.38 673.5 L 391.38 666.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 667px; margin-left: 225px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">LOAD PART(1024, 512, file1)</div></div></div></foreignObject><text x="225" y="667" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">LOAD PART(1024,...</text></switch></g><path d="M 399.5 680 L 480 680 Q 490 680 500 680 L 561.38 680" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 568.38 680 L 561.38 683.5 L 561.38 676.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 677px; margin-left: 485px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">RATIO REQUEST(Application1)</div></div></div></foreignObject><text x="485" y="677" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">RATIO REQUEST(A...</text></switch></g><path d="M 569.5 700 L 520 700 Q 510 700 500 700 L 407.62 700" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 400.62 700 L 407.62 696.5 L 407.62 703.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 697px; margin-left: 485px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">RATIO RESPONSE(Application1, upratio, downratio)</div></div></div></foreignObject><text x="485" y="697" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">RATIO RESPONSE(...</text></switch></g><path d="M 399.5 740 L 300 740 Q 290 740 280 740 L 57.62 740" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 50.62 740 L 57.62 736.5 L 57.62 743.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 737px; margin-left: 225px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">LOAD RESPONSE(file1, 1024, content(file1,1024, 512))</div></div></div></foreignObject><text x="225" y="737" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">LOAD RESPONSE(f...</text></switch></g><path d="M 40 780 L 606 780 L 620 794 L 620 850 L 40 850 L 40 780 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 606 780 L 606 794 L 620 794" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-start; justify-content: unsafe center; width: 578px; height: 1px; padding-top: 781px; margin-left: 41px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div>Application1 asks for all the missing fileparts (not represented here).</div><div>Application1 compute the hashsum locally and if it matches the received one, send</div><div>UPDATE RATIO to tracker.<br /></div></div></div></div></foreignObject><text x="330" y="793" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Application1 asks for all the missing fileparts (not represented here)....</text></switch></g><path d="M 50 880 L 561.38 880" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 568.38 880 L 561.38 883.5 L 561.38 876.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 877px; margin-left: 310px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">UPDATE RATIO(Application2, &lt;number of bytes sent by Application2&gt;)</div></div></div></foreignObject><text x="310" y="877" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">UPDATE RATIO(Ap...</text></switch></g><path d="M 49.5 910 L 310 910 Q 320 910 330 910 L 561.38 910" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 568.38 910 L 561.38 913.5 L 561.38 906.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 907px; margin-left: 301px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">UPDATE RATIO(Application3, &lt;number of bytes sent by Application3&gt;)</div></div></div></foreignObject><text x="301" y="907" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">UPDATE RATIO(Ap...</text></switch></g><path d="M 30 930 L 596 930 L 610 944 L 610 980 L 30 980 L 30 930 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 596 930 L 596 944 L 610 944" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-start; justify-content: unsafe center; width: 578px; height: 1px; padding-top: 931px; margin-left: 31px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div>The download is over. Application1will detect a change in filelist an register the new</div><div>file to the tracker.<br /></div></div></div></div></foreignObject><text x="320" y="943" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">The download is over. Application1will detect a change in filelist an register the new...</text></switch></g></g><switch><g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/><a transform="translate(0,-5)" xlink:href="https://desk.draw.io/support/solutions/articles/16000042487" target="_blank"><text text-anchor="middle" font-size="10px" x="50%" y="100%">Viewer does not support full SVG 1.1</text></a></switch></svg>
\ No newline at end of file
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text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 98px; height: 1px; padding-top: 20px; margin-left: 171px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Verdana; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Application2</div></div></div></foreignObject><text x="220" y="24" fill="#000000" font-family="Verdana" font-size="12px" text-anchor="middle">Application2</text></switch></g><rect x="0" y="0" width="100" height="40" rx="6" ry="6" fill="#ffffff" stroke="#000000" pointer-events="all"/><path d="M 50 40 L 50 940" fill="none" stroke="#000000" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 98px; height: 1px; padding-top: 20px; margin-left: 1px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Verdana; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Application1</div></div></div></foreignObject><text x="50" y="24" fill="#000000" font-family="Verdana" font-size="12px" text-anchor="middle">Application1</text></switch></g><rect x="350" y="0" width="100" height="40" rx="6" ry="6" fill="#ffffff" stroke="#000000" pointer-events="all"/><path d="M 400 40 L 400 870" fill="none" stroke="#000000" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 98px; height: 1px; padding-top: 20px; margin-left: 351px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Verdana; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Application3</div></div></div></foreignObject><text x="400" y="24" fill="#000000" font-family="Verdana" font-size="12px" text-anchor="middle">Application3</text></switch></g><rect x="520" y="0" width="100" height="40" rx="6" ry="6" fill="#ffffff" stroke="#000000" pointer-events="all"/><path d="M 570 40 L 570 960" fill="none" stroke="#000000" stroke-miterlimit="10" stroke-dasharray="3 3" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 98px; height: 1px; padding-top: 20px; margin-left: 521px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Verdana; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">Tracker</div></div></div></foreignObject><text x="570" y="24" fill="#000000" font-family="Verdana" font-size="12px" text-anchor="middle">Tracker</text></switch></g><path d="M 49.67 110 L 300 110 Q 310 110 320 110 L 561.38 110" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 568.38 110 L 561.38 113.5 L 561.38 106.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 97px; margin-left: 330px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">DISCOVER REQUEST(file1)</div></div></div></foreignObject><text x="330" y="97" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">DISCOVER REQUES...</text></switch></g><path d="M 569.5 150 L 320 150 Q 310 150 300 150 L 57.78 150" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 50.78 150 L 57.78 146.5 L 57.78 153.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 147px; margin-left: 310px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">DISCOVER RESPONSE (file1, Application2, Application3)</div></div></div></foreignObject><text x="310" y="147" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">DISCOVER RESPON...</text></switch></g><path d="M 30 50 L 596 50 L 610 64 L 610 80 L 30 80 L 30 50 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 596 50 L 596 64 L 610 64" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-start; justify-content: unsafe center; width: 578px; height: 1px; padding-top: 51px; margin-left: 31px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div align="center">Applications are all already registered successfully into tracker.</div><div align="center">Lets start a download of file1 from Application1.</div></div></div></div></foreignObject><text x="320" y="63" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Applications are all already registered successfully into tracker....</text></switch></g><path d="M 50 210 L 561.38 210" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 568.38 210 L 561.38 213.5 L 561.38 206.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 207px; margin-left: 310px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">SIZE REQUEST(file1)</div></div></div></foreignObject><text x="310" y="207" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">SIZE REQUEST(fi...</text></switch></g><path d="M 569.5 240 L 220 240 Q 210 240 200 240 L 57.78 240" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 50.78 240 L 57.78 236.5 L 57.78 243.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 237px; margin-left: 300px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">SIZE RESPONSE(file1, sizeof(file1))</div></div></div></foreignObject><text x="300" y="237" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">SIZE RESPONSE(f...</text></switch></g><path d="M 50 280 L 211.38 280" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 218.38 280 L 211.38 283.5 L 211.38 276.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 277px; margin-left: 140px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">HASH REQUEST(file1, "SHA512")</div></div></div></foreignObject><text x="140" y="277" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">HASH REQUEST(fi...</text></switch></g><path d="M 220 310 L 57.78 310" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 50.78 310 L 57.78 306.5 L 57.78 313.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 307px; margin-left: 135px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">HASH RESPONSE(file1, sha512(file1))</div></div></div></foreignObject><text x="135" y="307" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">HASH RESPONSE(f...</text></switch></g><path d="M 50 340 L 391.38 340" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 398.38 340 L 391.38 343.5 L 391.38 336.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 337px; margin-left: 225px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">HASH REQUEST(file1, "SHA512")</div></div></div></foreignObject><text x="225" y="337" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">HASH REQUEST(fi...</text></switch></g><path d="M 400 370 L 57.78 370" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 50.78 370 L 57.78 366.5 L 57.78 373.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 367px; margin-left: 225px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">HASH RESPONSE(file1, sha512(file1))</div></div></div></foreignObject><text x="225" y="367" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">HASH RESPONSE(f...</text></switch></g><path d="M 20 385 L 586 385 L 600 399 L 600 440 L 20 440 L 20 385 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 586 385 L 586 399 L 600 399" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-start; justify-content: unsafe center; width: 578px; height: 1px; padding-top: 386px; margin-left: 21px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div>Application1 is requesting hashsum from each application to ensure applications have</div><div>the same file, but an improvement could be to register this sum in the tracker, and ask only the tracker once instead of asking each application.<br /></div></div></div></div></foreignObject><text x="310" y="398" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Application1 is requesting hashsum from each application to ensure applications have...</text></switch></g><path d="M 50 460 L 211.38 460" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 218.38 460 L 211.38 463.5 L 211.38 456.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 457px; margin-left: 135px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">LOAD PART(0, 512, file1)</div></div></div></foreignObject><text x="135" y="457" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">LOAD PART(0, 51...</text></switch></g><path d="M 220 490 L 561.38 490" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 568.38 490 L 561.38 493.5 L 561.38 486.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 487px; margin-left: 395px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">RATIO REQUEST(Application1)</div></div></div></foreignObject><text x="395" y="487" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">RATIO REQUE...</text></switch></g><path d="M 569.5 520 L 430 520 Q 420 520 410 520 L 227.78 520" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 220.78 520 L 227.78 516.5 L 227.78 523.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 517px; margin-left: 395px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">RATIO RESPONSE(Application1, upratio, downratio)</div></div></div></foreignObject><text x="395" y="517" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">RATIO RESPONSE(...</text></switch></g><path d="M 20 540 L 586 540 L 600 554 L 600 610 L 20 610 L 20 540 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 586 540 L 586 554 L 600 554" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-start; justify-content: unsafe center; width: 578px; height: 1px; padding-top: 541px; margin-left: 21px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div>Application2 will cache the ratio a few seconds, to avoid asking the tracker</div><div>on each LOAD PART.</div><div>Here, based on this ratio, Application2 randomly decide to send a DENY to punish Application1. This filepart will be asked again later, and possibly to an other application.<br /></div></div></div></div></foreignObject><text x="310" y="553" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Application2 will cache the ratio a few seconds, to avoid asking the tracker...</text></switch></g><path d="M 219.5 640 L 120 640 Q 110 640 100 640 L 57.78 640" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 50.78 640 L 57.78 636.5 L 57.78 643.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 637px; margin-left: 140px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">DENY(file1, 0)</div></div></div></foreignObject><text x="140" y="637" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">DENY(file1, 0)</text></switch></g><path d="M 49.67 670 L 170 670 Q 180 670 190 670 L 391.38 670" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 398.38 670 L 391.38 673.5 L 391.38 666.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 667px; margin-left: 225px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">LOAD PART(1024, 512, file1)</div></div></div></foreignObject><text x="225" y="667" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">LOAD PART(1024,...</text></switch></g><path d="M 399.67 680 L 480 680 Q 490 680 500 680 L 561.38 680" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 568.38 680 L 561.38 683.5 L 561.38 676.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 677px; margin-left: 485px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">RATIO REQUEST(Application1)</div></div></div></foreignObject><text x="485" y="677" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">RATIO REQUEST(A...</text></switch></g><path d="M 569.5 700 L 520 700 Q 510 700 500 700 L 407.78 700" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 400.78 700 L 407.78 696.5 L 407.78 703.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 697px; margin-left: 485px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">RATIO RESPONSE(Application1, upratio, downratio)</div></div></div></foreignObject><text x="485" y="697" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">RATIO RESPONSE(...</text></switch></g><path d="M 399.5 740 L 300 740 Q 290 740 280 740 L 57.78 740" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 50.78 740 L 57.78 736.5 L 57.78 743.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 737px; margin-left: 225px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">LOAD RESPONSE(file1, 1024, content(file1,1024, 512))</div></div></div></foreignObject><text x="225" y="737" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">LOAD RESPONSE(f...</text></switch></g><path d="M 40 780 L 606 780 L 620 794 L 620 850 L 40 850 L 40 780 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 606 780 L 606 794 L 620 794" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-start; justify-content: unsafe center; width: 578px; height: 1px; padding-top: 781px; margin-left: 41px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div>Application1 asks for all the missing fileparts (not represented here).</div><div>Application1 compute the hashsum locally and if it matches the received one, send</div><div>UPDATE RATIO to tracker.<br /></div></div></div></div></foreignObject><text x="330" y="793" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Application1 asks for all the missing fileparts (not represented here)....</text></switch></g><path d="M 50 880 L 561.38 880" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 568.38 880 L 561.38 883.5 L 561.38 876.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 877px; margin-left: 310px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">UPDATE RATIO(Application2, &lt;number of bytes sent by Application2&gt;)</div></div></div></foreignObject><text x="310" y="877" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">UPDATE RATIO(Ap...</text></switch></g><path d="M 49.67 910 L 310 910 Q 320 910 330 910 L 561.38 910" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke"/><path d="M 568.38 910 L 561.38 913.5 L 561.38 906.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 907px; margin-left: 301px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 11px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; background-color: #ffffff; white-space: nowrap; ">UPDATE RATIO(Application3, &lt;number of bytes sent by Application3&gt;)</div></div></div></foreignObject><text x="301" y="907" fill="#000000" font-family="Helvetica" font-size="11px" text-anchor="middle">UPDATE RATIO(Ap...</text></switch></g><path d="M 30 930 L 596 930 L 610 944 L 610 980 L 30 980 L 30 930 Z" fill="#ffffff" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><path d="M 596 930 L 596 944 L 610 944" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-start; justify-content: unsafe center; width: 578px; height: 1px; padding-top: 931px; margin-left: 31px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><div>The download is over. Application1will detect a change in filelist an register the new</div><div>file to the tracker.<br /></div></div></div></div></foreignObject><text x="320" y="943" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">The download is over. Application1will detect a change in filelist an register the new...</text></switch></g></g><switch><g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/><a transform="translate(0,-5)" xlink:href="https://desk.draw.io/support/solutions/articles/16000042487" target="_blank"><text text-anchor="middle" font-size="10px" x="50%" y="100%">Viewer does not support full SVG 1.1</text></a></switch></svg>
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