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: Thu Apr 2 17:59:52 2026 Auto Mode Machine = Linux oleg237-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-oleg237-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 6275 14664 666414 621657 64 8 13074 35108 385790 969761 64 16 6847 44079 811459 913649 64 32 11736 36305 1049372 1638743 64 64 9959 76112 1518251 1484662 128 4 11220 21195 499970 472678 128 8 14794 29814 753179 814915 128 16 15059 56018 1406136 883293 128 32 20853 79210 1778862 1391557 128 64 14849 126745 1152564 1421023 128 128 26250 113580 2286447 1663139 256 4 13325 22263 541253 508929 256 8 21362 37508 850282 663292 256 16 37128 57706 1040643 910872 256 32 37630 80401 1588832 1185399 256 64 55365 114230 1197295 988889 256 128 42425 141285 1272498 1632308 256 256 45022 151128 1817419 2563818 512 4 11452 13913 583110 195406 512 8 14424 37347 842214 701149 512 16 35711 67182 948197 1062161 512 32 36196 63921 948197 1426135 512 64 44259 80921 1570020 1242896 512 128 73597 106888 2244430 1239310 512 256 47904 187474 1383861 1599251 512 512 75594 99472 1689859 2178404 1024 4 17414 18043 771670 808265 1024 8 30024 32500 867704 864038 1024 16 29329 56466 1200447 981750 1024 32 40114 81795 1101046 1479591 1024 64 65733 140176 2115949 1189476 1024 128 69546 167374 1630707 1361836 1024 256 76870 186625 1687075 705735 1024 512 89887 150812 1614767 1582636 2048 4 16609 18348 505921 611348 2048 8 26123 32412 626691 685450 2048 16 49897 64613 1075111 1029128 2048 32 63366 80487 1404546 1133415 2048 64 83667 130289 1520394 1185831 2048 128 87957 130570 2029850 1334295 2048 256 80106 132187 1640927 2017929 2048 512 107461 178444 2509617 1870302 4096 4 17943 19638 929857 781834 4096 8 31328 33784 896287 710357 4096 16 44606 56914 1210377 858872 4096 32 61682 77771 1177041 1061678 4096 64 79842 130774 1412492 912231 4096 128 95911 132120 1254480 1281620 4096 256 82896 146489 1603227 1446384 4096 512 105292 151372 1745246 1864376 8192 4