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perf(cdn): 放宽源站限流并新增 OSS 源站同步以加速预热
预热需每个边缘节点各拉一份完整文件,回源总量=节点数x172MB,而 ECS 出网
仅约 6Mbps,导致预热耗时几十分钟至数小时且打满带宽影响 API。
A. nginx /downloads/ 移除 limit_rate、并发 8/24 放宽至 32/64:
接入 CDN 后该路径只服务 CDN 回源与少量直连兜底,原限流已只剩副作用,
多节点并发回源易撞上限被拒 503 而使预热失败或极慢
B. release.yml 新增 OSS 上传(CDN 源站):OSS 出网带宽极大,可使预热降至
分钟级且完全不占用 ECS。路径与 ECS 一致(downloads/ 前缀),故无需改
DOWNLOAD_BASE_URL、前端与 electron-updater 配置;ECS 同步保留作兜底
与存量客户端更新源。未配置 OSS_BUCKET 时该步骤跳过
文档修正先前判断:原结论'CDN 回源 ECS 即可,不需要 OSS'漏算了预热回源量,
已改为推荐 CDN + OSS 源站并附回源量估算表。1 parent 434847f commit 3b05789
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