ロードバランサ
ネットワークトラフィックを複数のサーバーに分散します。
Load balancing improves the responsiveness and availability of applications by preventing any single server from becoming a bottleneck. It provides a 'single point of entry' for clients and can perform health checks to ensure traffic is only sent to online servers.
graph LR
Center["ロードバランサ"]:::main
Rel_gateway["gateway"]:::related -.-> Center
click Rel_gateway "/terms/gateway"
Rel_cdn["cdn"]:::related -.-> Center
click Rel_cdn "/terms/cdn"
Rel_grid_computing["grid-computing"]:::related -.-> Center
click Rel_grid_computing "/terms/grid-computing"
classDef main fill:#7c3aed,stroke:#8b5cf6,stroke-width:2px,color:white,font-weight:bold,rx:5,ry:5;
classDef pre fill:#0f172a,stroke:#3b82f6,color:#94a3b8,rx:5,ry:5;
classDef child fill:#0f172a,stroke:#10b981,color:#94a3b8,rx:5,ry:5;
classDef related fill:#0f172a,stroke:#8b5cf6,stroke-dasharray: 5 5,color:#94a3b8,rx:5,ry:5;
linkStyle default stroke:#4b5563,stroke-width:2px;
🧠 理解度チェック
🧒 5歳でもわかるように説明
Imagine a very busy restaurant with 10 waiters. A load balancer is like the host at the front door who tells each customer which table to sit at, making sure no single waiter has too many people to serve while others are idle.
🤓 Expert Deep Dive
Layer 4 load balancers work at the transport layer (TCP/UDP) based on IP and port. Layer 7 load balancers work at the application layer, allowing for 'sticky sessions' and routing based on URL paths or headers. Algorithms include Round Robin, Least Connections, and IP Hash.