# UFS 带宽限制

## 概述

Alluxio 的速率限制器功能旨在控制请求和数据的流量，以确保系统稳定性并优化资源利用率。它通过限制处理的数据量来帮助管理工作负载。

## UFS 读取速率限制器

UFS 读取速率限制器限制了单个 Worker 每秒用于 UFS 读取的最大带宽。尽管峰值带宽可能偶尔会超过限制，但平均带宽会保持在强制范围内。\
目前支持读取速率限制器的 UFS 包括 HDFS、S3、OSS、COS 和 GCS。

### 配置

在 `alluxio-site.properties` 文件中添加以下配置：

```properties
# 启用 UFS 读取速率限制器
# 通过此配置，Worker 中读取 UFS 的带宽将被限制为每秒 100MB。
alluxio.worker.data.ufs.read.rate.limit.mb=100
```


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