Generated 20 requests in 19.0 s, 80 KiB, 1 iops, 4.21 KiB/s tmp/ (ext4 /dev/md126p5) ioping statistics -ġ9 requests completed in 5.67 ms, 76 KiB read, 3.35 k iops, 13.1 MiB/s Run the latency test for your disk (20 requests are run): To check disk latency in Linux, the ioping tool is used: The latency values over 20 ms for typical data storage systems are considered poor. The higher the latency is, the more your app has to wait till it gets data from your disk. Latency is an input/output request delay that determines the time of access to a storage (measured in milliseconds). Iodepth=64 Measuring Disk Latency Using Iopingīesides IOPS, there is another important parameter that characterizes the quality of your storage: it is latency. To test write performance, use the following config file: The test will measure the read performance of a disk. To use the this option, create a file:Īnd add the following contents into it: Fio Config File Examplesįio allows to check disk performance using interactive commands and with configuration files prepared in advance for testing. If you refer to the official manufacturer documentation (these are Intel SSDs), it is safe to say that the values are true.
Like in read operation test, the difference as compared to a mixed test reaches 200-250 MiB/s and 50000 IOPS. Write operation performance on good SSDs is also very high.
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