Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Wed Sep 30 12:39:21 2026 Auto Mode Machine = Linux oleg235-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg235-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 3594 7480 561808 435202 64 8 5919 14256 718114 621657 64 16 6951 32857 886494 743988 64 32 7271 57656 1013707 653436 64 64 6177 19789 324665 1562436 128 4 4472 11307 501839 490380 128 8 5792 17278 852438 653282 128 16 3388 33473 1142750 761728 128 32 12315 44093 1142750 735635 128 64 8314 83277 1254941 1175271 128 128 13396 100315 1346196 1967960 256 4 9122 9956 486559 127359 256 8 8799 10372 719277 423933 256 16 24023 28119 999940 817898 256 32 17990 52544 991629 773140 256 64 22649 61217 1292410 1089202 256 128 27086 86224 733527 1280084 256 256 14791 127238 183897 1884399 512 4 7718 6254 553502 589028 512 8 17696 22753 690774 510964 512 16 11882 24633 1233614 600895 512 32 20963 52105 1150351 513039 512 64 13170 32675 1073309 1073309 512 128 14043 22474 301536 633699 512 256 33988 59216 803757 1410215 512 512 14749 40188 1635797 1992458 1024 4 9853 12609 154891 378718 1024 8 17483 19576 320692 203574 1024 16 7835 32205 391883 524877 1024 32 15699 54073 763576 945651 1024 64 34658 55139 1227903 528624 1024 128 34245 55767 261699 511743 1024 256 29721 143214 1195102 736094 1024 512 31529 89966 637253 421372 2048 4 6173 11663 253811 252342 2048 8 14066 17858 485888 193167 2048 16 11844 10781 426748 419741 2048 32 17601 33694 1116764 471357 2048 64 52750 49503 1168252 459703 2048 128 31836 55331 309281 642631 2048 256 39974 38911 1147343 627652 2048 512 29016 56560 1394966 516787 4096 4 7087 7828 304128 336703 4096 8 10228 13957 711093 284285 4096 16 12835 21092 448188 512574 4096 32 15752 26383 507307 445226 4096 64 16884 28221 344950 248210 4096 128 29043 26409 689544 464298 4096 256 42535 43542 936242 516706 4096 512 33393 23585 1042480 635049 8192 4 2178 7831 360037 230293 8192 8 10744 15593 274540 199425 8192 16 13957 22690 195247 398698 8192 32 18372 26177 986164 396435 8192 64 24397 43565 369810 308735 8192 128 29317 33943 866602 1141451 8192 256 25149 39700 436348 797268 8192 512 36889 54875 879624 653627 16384 4 9558 8074 335875 283415 16384 8 13799 12214 647540 620537 16384 16 17979 19919 795218 705446 16384 32 21664 30512 1048307 567667 16384 64 24497 40889 861493 1131318 16384 128 24009 47283 269801 526425 16384 256 25691 64819 665771 681106 16384 512 32283 43840 828186 589822 32768 4 6674 6069 284792 450238 32768 8 9535 8942 425895 371751 32768 16 14779 12959 285527 230390 32768 32 17073 26047 542606 414863 32768 64