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IOPS 计算可能有误 #29

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CornWorld opened this issue Jun 16, 2023 · 3 comments
Closed

IOPS 计算可能有误 #29

CornWorld opened this issue Jun 16, 2023 · 3 comments
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enhancement New feature or request

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@CornWorld
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@spiritLHLS
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lemonbench的原生问题，有空看看也许能修复

@spiritLHLS spiritLHLS added the enhancement New feature or request label Jun 17, 2023
@spiritLHLS
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903474a

应该已修复，你看再测一次看看

@spiritLHLS
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spiritLHLS commented Jun 19, 2023 •
edited

之前那个写入IOPS的计算是通过写入次数除以写入时间得到的：

DiskTest_WriteIOPS="$(echo ${DiskTest_WriteTime} $3 | awk '{printf "%d\n",$2/$1}')"

这种计算方法在大部分情况下是有效的，但对于较小的块大小和较大的写入次数，有偏差

因为IOPS是对每秒钟的读/写操作次数，而块大小和写入次数会影响到每个操作的大小。当块大小较小且写入次数较大时，每个操作的大小会减小，导致IOPS计算的结果偏小。

为了准确地计算IOPS，已经将写入操作的大小（块大小）与写入时间结合，得到总的写入字节数，然后将其除以写入时间来计算IOPS，这思路应该没毛病了

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@CornWorld @spiritLHLS