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refactor: 문서 개선 중

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donghyeon-ka
2026-09-21 14:30:55 +09:00
parent c93cdea150
commit 805a18f486
1497 changed files with 525837 additions and 59152 deletions
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docs/virtualization/final/assets/diagrams/vms-sharing-one-nvme/vms-sharing-one-nvme.alt.md
+11 -11
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@@ -10,17 +10,17 @@ VM1 QEMU, VM2 QEMU, Nginx, Host 기타 네 곳에서 나온 화살표가 하나
## Elements and evidence
- **VM1 QEMU** (service): 가상 머신 하나의 QEMU 프로세스. 게스트의 I/O 가 여기서 호스트 파일 I/O 가 된다. Evidence: L7029–L7029, L7041–L7044.
- **VM2 QEMU** (service): 다른 가상 머신의 QEMU 프로세스. Evidence: L7031–L7031, L7046–L7048.
- **Nginx** (service): 호스트에서 직접 도는 프로세스. Evidence: L7033–L7033.
- **Host 기타** (service): 그 밖의 호스트 프로세스. Evidence: L7035–L7038.
- **Host Block Layer** (service): 어디서 왔는지 구분하지 않고 모두 Host block request 로 다루는 계층. queue 에서 관리해 device 로 내보낸다. Evidence: L7031–L7031, L7017–L7022, L7054–L7054, L7058–L7060.
- **NVMe** (device): 네 갈래가 결국 함께 쓰는 하나의 물리 device. Evidence: L7031–L7031, L7019–L7019, L7066–L7069.
- **VM1 QEMU** (service): 가상 머신 하나의 QEMU 프로세스. 게스트의 I/O 가 여기서 호스트 파일 I/O 가 된다. Evidence: L7042–L7042, L7054–L7057.
- **VM2 QEMU** (service): 다른 가상 머신의 QEMU 프로세스. Evidence: L7044–L7044, L7059–L7061.
- **Nginx** (service): 호스트에서 직접 도는 프로세스. Evidence: L7046–L7046.
- **Host 기타** (service): 그 밖의 호스트 프로세스. Evidence: L7048–L7051.
- **Host Block Layer** (service): 어디서 왔는지 구분하지 않고 모두 Host block request 로 다루는 계층. queue 에서 관리해 device 로 내보낸다. Evidence: L7044–L7044, L7030–L7035, L7067–L7067, L7071–L7073.
- **NVMe** (device): 네 갈래가 결국 함께 쓰는 하나의 물리 device. Evidence: L7044–L7044, L7032–L7032, L7079–L7082.
## Relationships
- **VM1 QEMU → Host Block Layer:** data. Evidence: L7029–L7031.
- **VM2 QEMU → Host Block Layer:** data. Evidence: L7031–L7031.
- **Nginx → Host Block Layer:** data. Evidence: L7031–L7033.
- **Host 기타 → Host Block Layer:** data. Evidence: L7031–L7035.
- **Host Block Layer → NVMe:** dispatch. Evidence: L7031–L7031, L7054–L7054.
- **VM1 QEMU → Host Block Layer:** data. Evidence: L7042–L7044.
- **VM2 QEMU → Host Block Layer:** data. Evidence: L7044–L7044.
- **Nginx → Host Block Layer:** data. Evidence: L7044–L7046.
- **Host 기타 → Host Block Layer:** data. Evidence: L7044–L7048.
- **Host Block Layer → NVMe:** dispatch. Evidence: L7044–L7044, L7067–L7067.
docs/virtualization/final/assets/diagrams/vms-sharing-one-nvme/vms-sharing-one-nvme.d2
+1 -1
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@@ -1,6 +1,6 @@
# 가상 머신 둘과 호스트 프로세스가 하나의 NVMe 로 모인다
# Question: 서로 다른 곳에서 시작한 I/O 는 어디에서 하나로 모여 device 로 나가는가
direction: down
direction: right
n0: "VM1 QEMU" {
shape: rectangle
}
docs/virtualization/final/assets/diagrams/vms-sharing-one-nvme/vms-sharing-one-nvme.dot
+16
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@@ -0,0 +1,16 @@
digraph techviz {
graph [rankdir=LR, splines=ortho, nodesep=0.55, ranksep=0.85];
node [fontname=Helvetica, fontsize=11, margin="0.18,0.12", style="rounded,filled", fillcolor=white, color="#2d4357", penwidth=1.5];
edge [fontname=Helvetica, fontsize=10, color="#364b5f", penwidth=1.4, arrowsize=0.75];
n0 [label="VM1 QEMU", shape=box, style="rounded,filled"];
n1 [label="VM2 QEMU", shape=box, style="rounded,filled"];
n2 [label="Nginx", shape=box, style="rounded,filled"];
n3 [label="Host 기타", shape=box, style="rounded,filled"];
n4 [label="Host Block Layer", shape=box, style="rounded,filled"];
n5 [label="NVMe", shape=box, style="rounded,filled"];
n0 -> n4 [label="", style=solid];
n1 -> n4 [label="", style=solid];
n2 -> n4 [label="", style=solid];
n3 -> n4 [label="", style=solid];
n4 -> n5 [label="dispatch", style=solid];
}
docs/virtualization/final/assets/diagrams/vms-sharing-one-nvme/vms-sharing-one-nvme.drawio
+17 -17
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@@ -1,51 +1,51 @@
<?xml version="1.0" encoding="UTF-8"?>
<mxfile host="app.diagrams.net" modified="2026-07-23T00:00:00.000Z" agent="techviz-harness" version="24.7.17" type="device">
<diagram id="vms-sharing-one-nvme" name="가상 머신 둘과 호스트 프로세스가 하나의 NVMe 로 모인다">
<mxGraphModel dx="895" dy="580" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="895" pageHeight="1169" math="0" shadow="0">
<mxGraphModel dx="895" dy="642" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="895" pageHeight="1169" math="0" shadow="0">
<root>
<mxCell id="0"/>
<mxCell id="1" parent="0"/>
<mxCell id="n_vm1-qemu" value="VM1 QEMU&lt;br/&gt;WRITE X&lt;br/&gt;READ Y&lt;br/&gt;WRITE Z" tooltip="가상 머신 하나의 QEMU 프로세스. 게스트의 I/O 가 여기서 호스트 파일 I/O 가 된다. | Evidence: L7029-L7029, L7041-L7044" style="whiteSpace=wrap;html=1;rounded=1;strokeWidth=2;fontSize=14;fontStyle=1;fillColor=#ffffff;strokeColor=#2d4357;verticalAlign=middle;" vertex="1" parent="1">
<mxCell id="n_vm1-qemu" value="VM1 QEMU&lt;br/&gt;WRITE X&lt;br/&gt;READ Y&lt;br/&gt;WRITE Z" tooltip="가상 머신 하나의 QEMU 프로세스. 게스트의 I/O 가 여기서 호스트 파일 I/O 가 된다. | Evidence: L7042-L7042, L7054-L7057" style="whiteSpace=wrap;html=1;rounded=1;strokeWidth=2;fontSize=14;fontStyle=1;fillColor=#ffffff;strokeColor=#2d4357;verticalAlign=middle;" vertex="1" parent="1">
<mxGeometry x="70.0" y="60.0" width="150.0" height="105.0" as="geometry"/>
</mxCell>
<mxCell id="n_vm2-qemu" value="VM2 QEMU&lt;br/&gt;READ A&lt;br/&gt;WRITE B" tooltip="다른 가상 머신의 QEMU 프로세스. | Evidence: L7031-L7031, L7046-L7048" style="whiteSpace=wrap;html=1;rounded=1;strokeWidth=2;fontSize=14;fontStyle=1;fillColor=#ffffff;strokeColor=#2d4357;verticalAlign=middle;" vertex="1" parent="1">
<mxGeometry x="280.0" y="68.5" width="150.0" height="88.0" as="geometry"/>
<mxCell id="n_vm2-qemu" value="VM2 QEMU&lt;br/&gt;READ A&lt;br/&gt;WRITE B" tooltip="다른 가상 머신의 QEMU 프로세스. | Evidence: L7044-L7044, L7059-L7061" style="whiteSpace=wrap;html=1;rounded=1;strokeWidth=2;fontSize=14;fontStyle=1;fillColor=#ffffff;strokeColor=#2d4357;verticalAlign=middle;" vertex="1" parent="1">
<mxGeometry x="70.0" y="237.0" width="150.0" height="88.0" as="geometry"/>
</mxCell>
<mxCell id="n_nginx" value="Nginx" tooltip="호스트에서 직접 도는 프로세스. | Evidence: L7033-L7033" style="whiteSpace=wrap;html=1;rounded=1;strokeWidth=2;fontSize=14;fontStyle=1;fillColor=#ffffff;strokeColor=#2d4357;verticalAlign=middle;" vertex="1" parent="1">
<mxGeometry x="490.0" y="80.5" width="150.0" height="64.0" as="geometry"/>
<mxCell id="n_nginx" value="Nginx" tooltip="호스트에서 직접 도는 프로세스. | Evidence: L7046-L7046" style="whiteSpace=wrap;html=1;rounded=1;strokeWidth=2;fontSize=14;fontStyle=1;fillColor=#ffffff;strokeColor=#2d4357;verticalAlign=middle;" vertex="1" parent="1">
<mxGeometry x="70.0" y="397.0" width="150.0" height="64.0" as="geometry"/>
</mxCell>
<mxCell id="n_host-other" value="Host 기타" tooltip="그 밖의 호스트 프로세스. | Evidence: L7035-L7038" style="whiteSpace=wrap;html=1;rounded=1;strokeWidth=2;fontSize=14;fontStyle=1;fillColor=#ffffff;strokeColor=#2d4357;verticalAlign=middle;" vertex="1" parent="1">
<mxGeometry x="700.0" y="80.5" width="150.0" height="64.0" as="geometry"/>
<mxCell id="n_host-other" value="Host 기타" tooltip="그 밖의 호스트 프로세스. | Evidence: L7048-L7051" style="whiteSpace=wrap;html=1;rounded=1;strokeWidth=2;fontSize=14;fontStyle=1;fillColor=#ffffff;strokeColor=#2d4357;verticalAlign=middle;" vertex="1" parent="1">
<mxGeometry x="70.0" y="533.0" width="150.0" height="64.0" as="geometry"/>
</mxCell>
<mxCell id="n_host-block-layer" value="Host Block Layer&lt;br/&gt;Host block request&lt;br/&gt;blk-mq" tooltip="어디서 왔는지 구분하지 않고 모두 Host block request 로 다루는 계층. queue 에서 관리해 device 로 내보낸다. | Evidence: L7031-L7031, L7017-L7022, L7054-L7054, L7058-L7060" style="whiteSpace=wrap;html=1;rounded=1;strokeWidth=2;fontSize=14;fontStyle=1;fillColor=#ffffff;strokeColor=#2d4357;verticalAlign=middle;strokeColor=#2563eb;strokeWidth=2;" vertex="1" parent="1">
<mxGeometry x="380.0" y="261.0" width="160.0" height="88.0" as="geometry"/>
<mxCell id="n_host-block-layer" value="Host Block Layer&lt;br/&gt;Host block request&lt;br/&gt;blk-mq" tooltip="어디서 왔는지 구분하지 않고 모두 Host block request 로 다루는 계층. queue 에서 관리해 device 로 내보낸다. | Evidence: L7044-L7044, L7030-L7035, L7067-L7067, L7071-L7073" style="whiteSpace=wrap;html=1;rounded=1;strokeWidth=2;fontSize=14;fontStyle=1;fillColor=#ffffff;strokeColor=#2d4357;verticalAlign=middle;strokeColor=#2563eb;strokeWidth=2;" vertex="1" parent="1">
<mxGeometry x="380.0" y="284.5" width="160.0" height="88.0" as="geometry"/>
</mxCell>
<mxCell id="n_nvme" value="NVMe" tooltip="네 갈래가 결국 함께 쓰는 하나의 물리 device. | Evidence: L7031-L7031, L7019-L7019, L7066-L7069" style="whiteSpace=wrap;html=1;rounded=1;strokeWidth=2;fontSize=14;fontStyle=1;fillColor=#ffffff;strokeColor=#2d4357;verticalAlign=middle;shape=cylinder3;boundedLbl=1;backgroundOutline=1;fillColor=#eef6fb;" vertex="1" parent="1">
<mxGeometry x="385.0" y="445.0" width="150.0" height="90.0" as="geometry"/>
<mxCell id="n_nvme" value="NVMe" tooltip="네 갈래가 결국 함께 쓰는 하나의 물리 device. | Evidence: L7044-L7044, L7032-L7032, L7079-L7082" style="whiteSpace=wrap;html=1;rounded=1;strokeWidth=2;fontSize=14;fontStyle=1;fillColor=#ffffff;strokeColor=#2d4357;verticalAlign=middle;shape=cylinder3;boundedLbl=1;backgroundOutline=1;fillColor=#eef6fb;" vertex="1" parent="1">
<mxGeometry x="700.0" y="296.5" width="150.0" height="64.0" as="geometry"/>
</mxCell>
<mxCell id="e_vm1-to-block-layer" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;strokeWidth=2;endArrow=block;endFill=1;" edge="1" parent="1" source="n_vm1-qemu" target="n_host-block-layer">
<mxGeometry relative="1" as="geometry">
<mxPoint x="289.0" y="185.0" as="offset"/>
<mxPoint x="324.0" y="207.0" as="offset"/>
</mxGeometry>
</mxCell>
<mxCell id="e_vm2-to-block-layer" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;strokeWidth=2;endArrow=block;endFill=1;" edge="1" parent="1" source="n_vm2-qemu" target="n_host-block-layer">
<mxGeometry relative="1" as="geometry">
<mxPoint x="403.0" y="180.8" as="offset"/>
<mxPoint x="324.0" y="300.2" as="offset"/>
</mxGeometry>
</mxCell>
<mxCell id="e_nginx-to-block-layer" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;strokeWidth=2;endArrow=block;endFill=1;" edge="1" parent="1" source="n_nginx" target="n_host-block-layer">
<mxGeometry relative="1" as="geometry">
<mxPoint x="517.0" y="174.8" as="offset"/>
<mxPoint x="324.0" y="383.2" as="offset"/>
</mxGeometry>
</mxCell>
<mxCell id="e_host-other-to-block-layer" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;strokeWidth=2;endArrow=block;endFill=1;" edge="1" parent="1" source="n_host-other" target="n_host-block-layer">
<mxGeometry relative="1" as="geometry">
<mxPoint x="631.0" y="174.8" as="offset"/>
<mxPoint x="324.0" y="460.2" as="offset"/>
</mxGeometry>
</mxCell>
<mxCell id="e_block-layer-to-nvme" value="dispatch" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;strokeWidth=2;endArrow=block;endFill=1;" edge="1" parent="1" source="n_host-block-layer" target="n_nvme">
<mxGeometry relative="1" as="geometry">
<mxPoint x="484.0" y="397.0" as="offset"/>
<mxPoint x="620.0" y="300.5" as="offset"/>
</mxGeometry>
</mxCell>
</root>
docs/virtualization/final/assets/diagrams/vms-sharing-one-nvme/vms-sharing-one-nvme.excalidraw
+82 -82
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@@ -6,10 +6,10 @@
{
"id": "edge-vm1-to-block-layer",
"type": "arrow",
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"height": 96.0,
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"y": 112.5,
"width": 160.0,
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"angle": 0,
"strokeColor": "#1e1e1e",
"backgroundColor": "transparent",
@@ -36,16 +36,16 @@
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"lastCommittedPoint": null,
@@ -66,10 +66,10 @@
{
"id": "edge-vm2-to-block-layer",
"type": "arrow",
"x": 355.0,
"y": 156.5,
"width": 96.0,
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"x": 220.0,
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"angle": 0,
"strokeColor": "#1e1e1e",
"backgroundColor": "transparent",
@@ -96,16 +96,16 @@
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[
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],
"lastCommittedPoint": null,
@@ -126,10 +126,10 @@
{
"id": "edge-nginx-to-block-layer",
"type": "arrow",
"x": 469.0,
"y": 144.5,
"width": 96.0,
"height": 116.5,
"x": 220.0,
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"width": 160.0,
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"angle": 0,
"strokeColor": "#1e1e1e",
"backgroundColor": "transparent",
@@ -152,20 +152,20 @@
"locked": false,
"points": [
[
96.0,
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91.5
],
[
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],
[
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[
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[
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[
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],
"lastCommittedPoint": null,
@@ -186,10 +186,10 @@
{
"id": "edge-host-other-to-block-layer",
"type": "arrow",
"x": 487.0,
"y": 144.5,
"width": 288.0,
"height": 116.5,
"x": 220.0,
"y": 355.5,
"width": 160.0,
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"angle": 0,
"strokeColor": "#1e1e1e",
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@@ -212,20 +212,20 @@
"locked": false,
"points": [
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@@ -246,10 +246,10 @@
{
"id": "edge-block-layer-to-nvme",
"type": "arrow",
"x": 460.0,
"y": 349.0,
"width": 0.0,
"height": 96.0,
"x": 540.0,
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"strokeColor": "#1e1e1e",
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@@ -276,16 +276,16 @@
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@@ -306,8 +306,8 @@
{
"id": "edge-label-block-layer-to-nvme",
"type": "text",
"x": 439.0,
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"x": 575.0,
"y": 288.5,
"width": 90,
"height": 24,
"angle": 0,
@@ -414,8 +414,8 @@
{
"id": "node-vm2-qemu",
"type": "rectangle",
"x": 280.0,
"y": 68.5,
"x": 70.0,
"y": 237.0,
"width": 150.0,
"height": 88.0,
"angle": 0,
@@ -444,8 +444,8 @@
{
"id": "node-label-vm2-qemu",
"type": "text",
"x": 290.0,
"y": 78.5,
"x": 80.0,
"y": 247.0,
"width": 130.0,
"height": 68.0,
"angle": 0,
@@ -483,8 +483,8 @@
{
"id": "node-nginx",
"type": "rectangle",
"x": 490.0,
"y": 80.5,
"x": 70.0,
"y": 397.0,
"width": 150.0,
"height": 64.0,
"angle": 0,
@@ -513,8 +513,8 @@
{
"id": "node-label-nginx",
"type": "text",
"x": 500.0,
"y": 90.5,
"x": 80.0,
"y": 407.0,
"width": 130.0,
"height": 44.0,
"angle": 0,
@@ -552,8 +552,8 @@
{
"id": "node-host-other",
"type": "rectangle",
"x": 700.0,
"y": 80.5,
"x": 70.0,
"y": 533.0,
"width": 150.0,
"height": 64.0,
"angle": 0,
@@ -582,8 +582,8 @@
{
"id": "node-label-host-other",
"type": "text",
"x": 710.0,
"y": 90.5,
"x": 80.0,
"y": 543.0,
"width": 130.0,
"height": 44.0,
"angle": 0,
@@ -622,7 +622,7 @@
"id": "node-host-block-layer",
"type": "rectangle",
"x": 380.0,
"y": 261.0,
"y": 284.5,
"width": 160.0,
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"angle": 0,
@@ -652,7 +652,7 @@
"id": "node-label-host-block-layer",
"type": "text",
"x": 390.0,
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"y": 294.5,
"width": 140.0,
"height": 68.0,
"angle": 0,
@@ -690,10 +690,10 @@
{
"id": "node-nvme",
"type": "rectangle",
"x": 385.0,
"y": 445.0,
"x": 700.0,
"y": 296.5,
"width": 150.0,
"height": 90.0,
"height": 64.0,
"angle": 0,
"strokeColor": "#1e1e1e",
"backgroundColor": "#ffffff",
@@ -720,10 +720,10 @@
{
"id": "node-label-nvme",
"type": "text",
"x": 395.0,
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"height": 44.0,
"angle": 0,
"strokeColor": "#1e1e1e",
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docs/virtualization/final/assets/diagrams/vms-sharing-one-nvme/vms-sharing-one-nvme.manifest.json
+17 -6
View File
@@ -2,30 +2,41 @@
"harness_version": "0.2.0",
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"line": 7039
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},
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docs/virtualization/final/assets/diagrams/vms-sharing-one-nvme/vms-sharing-one-nvme.mmd
+1 -1
View File
@@ -1,6 +1,6 @@
%% 가상 머신 둘과 호스트 프로세스가 하나의 NVMe 로 모인다
%% question: 서로 다른 곳에서 시작한 I/O 는 어디에서 하나로 모여 device 로 나가는가
flowchart TB
flowchart LR
n0["VM1 QEMU"]
n1["VM2 QEMU"]
n2["Nginx"]
docs/virtualization/final/assets/diagrams/vms-sharing-one-nvme/vms-sharing-one-nvme.svg
+27 -27
View File
@@ -1,8 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" width="895" height="580" viewBox="0 0 895 580" role="img" aria-labelledby="diagram-title diagram-description">
<svg xmlns="http://www.w3.org/2000/svg" width="895" height="642" viewBox="0 0 895 642" role="img" aria-labelledby="diagram-title diagram-description">
<title id="diagram-title">가상 머신 둘과 호스트 프로세스가 하나의 NVMe 로 모인다</title>
<desc id="diagram-description">위쪽에 네 출발점이 나란히 있다. VM1 QEMU 는 WRITE X 와 READ Y, WRITE Z 를 내고 VM2 QEMU 는 READ A 와 WRITE B 를 내며, 그 옆에 호스트의 Nginx 와 다른 프로세스가 있다. 네 갈래가 모두 가운데의 Host Block Layer 하나로 모인다. Host Block Layer 는 그 I/O 가 가상 머신 안에서 시작했는지 호스트 프로세스에서 시작했는지를 본질적으로 구분해 처리하는 계층이 아니라 들어온 것을 모두 Host block request 로 다루고, 그 요청들을 queue 에서 관리해 맨 아래 NVMe 로 dispatch 한다. 여기서 생기는 경쟁이 Storage Contention 이고 CPU 실행 시간을 두고 벌어지는 CPU Contention 과는 다투는 자원이 다르다는 것은 본문 문단이 맡는다.</desc>
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