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 Jun 11 21:30:09 2026 Auto Mode Machine = Linux oleg259-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-oleg259-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 1513 5075 566551 546928 64 8 2171 16108 703068 799377 64 16 1953 38392 1087638 146063 64 32 2849 26163 404998 1304314 64 64 2394 9398 1226821 1452528 128 4 4227 4142 653282 633247 128 8 3788 8461 767171 702889 128 16 7455 13290 992724 581781 128 32 4023 7998 1332828 921183 128 64 5394 16110 740710 902598 128 128 8715 67865 1521718 1878447 256 4 7110 7388 521536 316010 256 8 3926 7731 794889 107472 256 16 10737 13049 600928 531080 256 32 11748 26364 1123389 742146 256 64 14155 71431 1168627 580461 256 128 18131 97305 1534342 1639786 256 256 8545 79425 1570244 962301 512 4 7200 10750 392894 547017 512 8 7846 8827 751707 192689 512 16 13574 21844 803757 585814 512 32 19402 35422 900108 1038532 512 64 21355 60031 825699 1190529 512 128 18298 26657 1227971 1357615 512 256 15439 37163 1520013 1459080 512 512 6636 62715 1700565 846530 1024 4 3690 4399 210570 203825 1024 8 4435 9512 142895 326221 1024 16 5983 7707 1374474 867003 1024 32 21240 17492 1166221 893517 1024 64 16696 21337 444622 737864 1024 128 13303 16166 567981 316439 1024 256 19554 35304 937805 340875 1024 512 27104 69910 1580306 1264041 2048 4 6670 4604 160993 172784 2048 8 6659 6454 820526 327325 2048 16 18092 10902 200944 143166 2048 32 21486 33835 649335 436773 2048 64 12914 67017 554267 904222 2048 128 27985 111244 1670606 766424 2048 256 28531 37906 534738 612831 2048 512 26086 53746 1745990 673889 4096 4 5553 6876 178934 125183 4096 8 5233 9084 280182 460897 4096 16 20797 11248 572475 271946 4096 32 27644 31428 674466 281957 4096 64 20252 34565 464034 458523 4096 128 18298 53544 570479 468322 4096 256 39054 53499 819696 569439 4096 512 39065 57537 844352 391780 8192 4 1697 4203 314158 180040 8192 8 8105 7477 481769 284077 8192 16 15932 18055 568260 357679 8192 32 14250 25347 526313 542235 8192 64 19709 19201 373143 209620 8192 128 35930 38895 461335 698669 8192 256 38105 32306 355665 443169 8192 512 22715 26048 421009 440781 16384 4 4288 4919 171024 188738 16384 8 8588 8387 469280 437852 16384 16 13711 13462 358543 306615 16384 32 15992 20924 641657 301960 16384 64 19932 27292 672383 817730 16384 128 24893 35988 375323 387182 16384 256 21258 27292 605000 786859 16384 512 23014 35597 730741 500350 32768 4 4667 4903 216689 244076 32768 8