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 Sep 10 10:36:42 2026 Auto Mode Machine = Linux oleg320-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-oleg320-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 4616 10317 598110 168002 64 8 6310 30990 831569 703068 64 16 7849 15806 1066042 32669 64 32 4879 56634 1255511 548044 64 64 8323 91810 1249666 122360 128 4 4509 8528 564055 603357 128 8 6794 9294 895074 253503 128 16 6879 23791 1172704 1000121 128 32 5341 43053 1363288 1133103 128 64 13992 99221 1421023 1391557 128 128 16450 101683 1579934 2166499 256 4 8876 11607 682691 563701 256 8 13642 8102 576411 340459 256 16 9970 11213 616807 1036624 256 32 6430 32120 1094754 1231629 256 64 20740 53111 354159 709299 256 128 8221 28441 462858 1325925 256 256 19494 51897 1506359 2247235 512 4 3614 6561 241839 303496 512 8 7555 12331 557816 472306 512 16 4709 44333 1190529 982917 512 32 13055 17612 1245780 1030064 512 64 11978 79381 1455126 1700565 512 128 21455 88367 243926 1497750 512 256 22983 112724 2141475 671969 512 512 38132 113775 313327 1454140 1024 4 11389 4181 112874 181622 1024 8 5951 7677 452730 258642 1024 16 11896 31480 790707 466296 1024 32 20957 21418 210436 285156 1024 64 26613 41445 345927 442743 1024 128 11073 48738 624376 493742 1024 256 27911 80344 964986 1051192 1024 512 32029 64298 1154311 607336 2048 4 6162 5193 241971 227887 2048 8 8079 7842 516662 784626 2048 16 10014 22873 690020 684031 2048 32 25897 40208 823200 638808 2048 64 35206 45197 1462911 767931 2048 128 46166 64166 815928 700886 2048 256 39607 63199 1699359 474194 2048 512 39513 44500 1702391 1605053 4096 4 6124 5564 499562 280374 4096 8 12366 11527 531887 435100 4096 16 26048 17692 499766 509957 4096 32 23711 34640 1001752 868160 4096 64 31841 60482 673223 681637 4096 128 29074 53797 966746 1585764 4096 256 21080 57121 866890 575447 4096 512 31640 55171 1794091 1542759 8192 4 6167 6089 356359 213023 8192 8 11126 14194 590923 433414 8192 16 16088 16105 383142 495791 8192 32 18321 27510 525572 544391 8192 64 33358 40563 405966 449247 8192 128 24585 39869 849273 701837 8192 256 38215 86567 862231 823149 8192 512 36118 65236 819282 1084594 16384 4 6219 6550 408223 361676 16384 8 10866 13331 515904 273605 16384 16 20967 22029 566273 613288 16384 32 27175 34774 682581 537724 16384 64 35940 44504 947700 411958 16384 128 38762 49052 662945 367519 16384 256 37802 80975 694467 500211 16384 512 44705 55957 1096217 599600 32768 4 6733 7308 200166 184458 32768 8 10618 12269 497789 344042 32768 16 18198 22175 461885 518669 32768 32 23060 30340 617564 388951 32768 64 25353 33167 482613 425182 32768 128