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Merge pull request #1463 from CyC2018/add-index-log-redis-topics

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补充索引失效、MySQL 日志、Redis 编码与集群等内容
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CyC2018
2026-10-26 03:49:53 +08:00
committed by GitHub
parent 54c323f353 b3277daaae
commit b47fd4b0e1
7 changed files with 300 additions and 1 deletions
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tools/diagram/src/mysql-2pc.svg
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<rect width="100%" height="100%" fill="#FFFFFF"/>
<text x="360" y="28" class="title">两阶段提交与崩溃恢复</text>
<rect x="10" y="64" width="124" height="60" rx="6" class="shadow"/>
<rect x="8" y="62" width="124" height="60" rx="6" fill="#E6E6E6"/>
<text x="70" y="90" class="b c">开始事务</text>
<text x="70" y="105" class="sub c">修改内存中的页</text>
<rect x="160" y="64" width="124" height="60" rx="6" class="shadow"/>
<rect x="158" y="62" width="124" height="60" rx="6" fill="#B1DDF0"/>
<text x="220" y="90" class="b c">① prepare</text>
<text x="220" y="105" class="sub c">写 redo log 并刷盘</text>
<rect x="340" y="64" width="124" height="60" rx="6" class="shadow"/>
<rect x="338" y="62" width="124" height="60" rx="6" fill="#B0E3E6"/>
<text x="400" y="90" class="b c">② 写 binlog</text>
<text x="400" y="105" class="sub c">含 Xid，刷盘</text>
<rect x="520" y="64" width="124" height="60" rx="6" class="shadow"/>
<rect x="518" y="62" width="124" height="60" rx="6" fill="#DDD7F6"/>
<text x="580" y="90" class="b c">③ commit</text>
<text x="580" y="105" class="sub c">redo log 标记提交</text>
<line x1="134" y1="92" x2="154" y2="92" class="arrow "/>
<line x1="284" y1="92" x2="334" y2="92" class="arrow "/>
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<line x1="310" y1="132" x2="310" y2="172" stroke="#C0605A" stroke-width="1.5" stroke-dasharray="4 3"/>
<text x="310" y="190" class="c note">崩溃 A</text>
<line x1="490" y1="132" x2="490" y2="172" stroke="#C0605A" stroke-width="1.5" stroke-dasharray="4 3"/>
<text x="490" y="190" class="c note">崩溃 B</text>
<rect x="200" y="210" width="220" height="54" rx="4" fill="#FFFFFF" stroke="#C8C8C8"/>
<text x="310" y="232" class="c sub">redo log 处于 prepare，binlog 中没有 Xid</text>
<text x="310" y="252" class="c ok">重启后回滚，主从都没有这次修改</text>
<rect x="430" y="210" width="270" height="54" rx="4" fill="#FFFFFF" stroke="#C8C8C8"/>
<text x="565" y="232" class="c sub">redo log 处于 prepare，binlog 中有 Xid</text>
<text x="565" y="252" class="c ok">重启后提交，从库也会通过 binlog 收到修改</text>
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<line x1="490" y1="196" x2="520" y2="206" class="arrow "/>
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tools/diagram/src/redis-cluster.svg
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<style>
text { font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif; fill: #666; font-size: 12px; }
.title { font-weight: bold; font-size: 15px; fill: #777; text-anchor: middle; }
.b { font-weight: bold; }
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.note { fill: #C0605A; }
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<text x="360" y="28" class="title">Redis Cluster：3 主 3 从</text>
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<text x="125" y="74" class="c b mono">user:1001</text>
<text x="125" y="94" class="c sub mono">CRC16(key) % 16384 = 5712</text>
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<rect x="250" y="150" width="140" height="52" rx="6" fill="#B1DDF0"/>
<text x="320" y="174" class="b c">主节点 7001</text>
<text x="320" y="189" class="sub c">槽 0～5460</text>
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<rect x="260" y="250" width="120" height="36" rx="6" fill="#E6E6E6"/>
<text x="320" y="272.5" class="b c">从节点</text>
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<text x="470" y="174" class="b c">主节点 7002</text>
<text x="470" y="189" class="sub c">槽 5461～10922</text>
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<rect x="410" y="250" width="120" height="36" rx="6" fill="#E6E6E6"/>
<text x="470" y="272.5" class="b c">从节点</text>
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<rect x="550" y="150" width="140" height="52" rx="6" fill="#B1DDF0"/>
<text x="620" y="174" class="b c">主节点 7003</text>
<text x="620" y="189" class="sub c">槽 10923～16383</text>
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<rect x="560" y="250" width="120" height="36" rx="6" fill="#E6E6E6"/>
<text x="620" y="272.5" class="b c">从节点</text>
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<text x="325" y="236" class="sub">异步复制</text>
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<text x="380" y="104" class="c sub">槽 5712 在 7002</text>
<text x="20" y="128" class="sub note">如果发给 7001：MOVED 5712 127.0.0.1:7002</text>
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<text x="20" y="312" class="sub">{user:1001}:cart 和 {user:1001}:orders 只按 {} 中的部分计算，都在槽 5712，可以在同一条命令或 Lua 脚本中使用</text>
<text x="20" y="330" class="sub">主节点宕机后，从节点被选为新的主节点；本机 cluster-node-timeout 为 5 秒时，这部分槽约 9 秒无法写入</text>
</svg>
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