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SegmentedStorePolicy

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分层存储策略:冷层编码、热盘保留、上传并发 / 重试预算、载入预取与流变换。

属性

Section titled “属性”

codec?

Section titled “codec?”
optional codec?: SegmentCodec;

冷层封存段编码;缺省 ‘jsonl+gzip’(zstd 仅 Node ≥ 22.15 可用)

hotRetention?

Section titled “hotRetention?”
optional hotRetention?: {
  keepRecentSegments?: number;
  maxBytes?: number;
};

热盘保留:触顶 → store.hot_full 事件 + readiness 红;恒不删未上传段

keepRecentSegments?

Section titled “keepRecentSegments?”
optional keepRecentSegments?: number;

maxBytes?

Section titled “maxBytes?”
optional maxBytes?: number;

keyMapper?

Section titled “keyMapper?”
optional keyMapper?: (canonicalKey) => string;

规范键 → 适配器键(不得破坏唯一性)

参数

Section titled “参数”
canonicalKey
Section titled “canonicalKey”

string

返回

Section titled “返回”

string

restore?

Section titled “restore?”
optional restore?: {
  prefetchTailSegments?: number;
};

载入:缺省只预取 1 个尾段(压缩后通常 = 摘要 + 尾段)

prefetchTailSegments?

Section titled “prefetchTailSegments?”
optional prefetchTailSegments?: number;

tenant?

Section titled “tenant?”
optional tenant?: string;

规范键首段;缺省 ‘default’

transform?

Section titled “transform?”
optional transform?: StreamTransform;

upload?

Section titled “upload?”
optional upload?: {
  concurrency?: number;
  mode?: "async" | "sync";
  retryBudget?: {
     attempts: number;
     maxBackoffMs: number;
  };
};

上传:缺省 async / 并发 4 / 重试预算 8 次、退避封顶 60 s

concurrency?

Section titled “concurrency?”
optional concurrency?: number;

mode?

Section titled “mode?”
optional mode?: "async" | "sync";

retryBudget?

Section titled “retryBudget?”
optional retryBudget?: {
  attempts: number;
  maxBackoffMs: number;
};
retryBudget.attempts
Section titled “retryBudget.attempts”
attempts: number;
retryBudget.maxBackoffMs
Section titled “retryBudget.maxBackoffMs”
maxBackoffMs: number;