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Accepted
Bruce Johnson
Asked: 2021-10-05 07:56:07 +0800 CST

是否有可以以恒定吞吐量读写磁盘的工具？

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我正在寻找一种能够以恒定的目标吞吐量（例如 3Mb/s）读写数据的工具，而不是将 I/O 系统推到极限。然后，我打算在这种相当稳定的 I/O 活动发生时监控各种指标。我看过类似的工具stress，fio但似乎它们更倾向于最大吞吐量。对于可以执行此类操作的工具的任何建议将不胜感激。谢谢。

benchmark io

2 个回答

  1. pv -L应该可以覆盖。

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  2. Best Answer

    我找到了似乎可以满足我要求的--rate选项：fio

    rate=int[,int][,int]

Cap the bandwidth used by this job. The number is in bytes/sec, the normal suffix
rules apply. Comma-separated values may be specified for reads, writes, and trims
as described in blocksize.

For example, using rate=1m,500k would limit reads to 1MiB/sec and writes to
500KiB/sec. Capping only reads or writes can be done with rate=,500k or
rate=500k, where the former will only limit writes (to 500KiB/sec) and the latter
will only limit reads.

    https://fio.readthedocs.io/en/latest/fio_man.html#cmdoption-arg-rate

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