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: Tue Aug 4 17:44:25 2026 Auto Mode Machine = Linux oleg335-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-oleg335-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 1694 5887 659861 135861 64 8 1161 5512 743988 727850 64 16 1715 22544 955947 1029254 64 32 1978 41292 1392258 1304314 64 64 1954 55418 274809 1526887 128 4 3539 7154 595328 262296 128 8 2287 10330 711270 311445 128 16 6945 17618 1057236 1074159 128 32 2203 56460 1162547 785122 128 64 7904 29560 1196221 1526043 128 128 3353 30110 1471662 1911894 256 4 2405 4788 659625 638066 256 8 8245 14733 705107 477684 256 16 11291 34510 265265 937106 256 32 18535 37575 515032 1075025 256 64 10740 19895 1487577 1157291 256 128 4562 15563 1649865 1224606 256 256 6638 46200 1660068 1766587 512 4 4841 3632 589837 542868 512 8 3502 5843 637650 766464 512 16 6781 10487 1034530 934173 512 32 7333 18686 738777 483906 512 64 7717 28780 1302447 1302447 512 128 14866 59561 1635797 1551867 512 256 25282 57079 1620980 1533034 512 512 20668 98708 609594 1594501 1024 4 8857 10261 248726 248123 1024 8 5868 12474 654341 819211 1024 16 10947 8640 1115342 160825 1024 32 20317 23687 844833 444852 1024 64 5935 13425 1391395 1151834 1024 128 9089 53632 772225 1424152 1024 256 12063 23748 1098511 1233900 1024 512 22277 33447 1599731 388762 2048 4 3909 6932 95259 121933 2048 8 3517 8414 897514 375979 2048 16 5887 6692 242019 886949 2048 32 16416 12761 361137 445517 2048 64 9440 26269 775418 298668 2048 128 26291 18761 530839 210095 2048 256 16041 22351 248093 265729 2048 512 19421 22902 1385516 217594 4096 4 1989 734 223629 408297 4096 8 10619 11004 453249 599085 4096 16 5548 7482 212270 223810 4096 32 13928 18377 1311559 303951 4096 64 11016 13117 1347355 395332 4096 128 16843 25837 509141 456234 4096 256 15591 19080 1561549 219790 4096 512 19734 24153 270094 306954 8192 4 4419 4472 137392 83719 8192 8 5165 4093 135937 127986 8192 16 6775 8152 314399 245725 8192 32 11697 10362 262244 147888 8192 64 11814 26099 678030 469159 8192 128 25280 27722 908607 409928 8192 256 27839 26022 568335 408743 8192 512 19641 22846 358875 267187 16384 4 3199 3534 200858 223060 16384 8 7049 6022 202304 191859 16384 16 7299 10022 349049 315708 16384 32 11414 12033 499985 375900 16384 64 14149 17969 553980 239354 16384 128 16886 21573 885528 934516 16384 256