Comparison of random I/O performance of the same number of disks and different raid levels

Test result graph: Summary: 1. if the application uses random I/O, raid1 + 0 should be used. In the case of the same number of hard disks, the performance is about 1.4 (+) times that of raid5. the higher random I/O, the worse the performance of raid5. In this test, when there are several large I/O operations, the test process has no response. Attached: Sysbench test IO method: sysbench -- file-num = 10 -- num-thread

Test result graph:
Summary:
1. If the application is dominated by random I/O, raid 1 + 0 should be used. In the case of the same number of hard disks, its performance is about 1.4 (+) times of raid 5.
2. The higher random I/O, the worse the performance of raid 5. In this test, when there are several large I/O operations, the test process does not respond.

Appendix:
Sysbench test io method:

Sysbench -- file-num = 10 -- num-threads = 16 -- test = fileio -- file-total-size = 30G -- max-requests = 10000000 -- file-test-mode = rndrw run