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 9 01:12:26 2026 Auto Mode Machine = Linux oleg245-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-oleg245-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 4566 9266 621657 566551 64 8 2932 14876 666414 703068 64 16 2468 26512 983980 763021 64 32 7139 33043 969761 603489 64 64 8694 72397 1188789 1879725 128 4 7583 9978 442668 295665 128 8 7103 15788 969421 821147 128 16 8403 32437 1436229 735635 128 32 5978 39508 1114289 633247 128 64 8747 65100 1363288 776042 128 128 7497 88405 1504659 1755594 256 4 8952 14582 591330 237458 256 8 4743 10970 928195 179381 256 16 8111 18974 1552085 731528 256 32 13151 40706 805021 1148625 256 64 12952 103355 1267990 1195962 256 128 9224 37048 1430119 485898 256 256 24178 72316 313336 2187712 512 4 8390 6799 167473 272184 512 8 9593 8069 590648 581689 512 16 17715 37891 667375 953248 512 32 47093 54042 1316016 650593 512 64 21372 19811 1204552 1218910 512 128 21193 88553 1245780 1273861 512 256 20804 58354 461248 1546280 512 512 40471 95631 1848401 48627 1024 4 7205 8476 317820 141301 1024 8 9756 11512 550791 732953 1024 16 24108 38186 895007 368104 1024 32 24518 56756 416752 681221 1024 64 28061 68171 965203 827896 1024 128 32317 42762 1040496 602396 1024 256 15061 57203 599537 1236742 1024 512 26377 33472 1762539 221073 2048 4 9493 13629 347351 279667 2048 8 9771 14866 887774 726249 2048 16 7026 16022 458256 935131 2048 32 18899 38641 511494 666671 2048 64 29835 41389 467153 672780 2048 128 20207 46083 1070022 316822 2048 256 33760 70523 548498 722401 2048 512 36807 79719 1748834 1563282 4096 4 8716 6641 169388 197168 4096 8 14065 16167 1447358 817551 4096 16 20695 17999 432570 379398 4096 32 15083 15966 462622 543309 4096 64 20305 29522 921083 357542 4096 128 20111 31598 1608781 322749 4096 256 14353 37123 579914 598480 4096 512 31401 92148 416564 895306 8192 4 7162 7462 153431 411514 8192 8 14914 14863 505366 541116 8192 16 18272 25699 742771 642913 8192 32 21671 29963 717909 780853 8192 64 27222 44727 463401 403208 8192 128 32328 39899 365401 230760 8192 256 25713 48672 1341663 949693 8192 512 38543 55313 404504 683356 16384 4 5242 8458 300397 378979 16384 8 10807 9069 527156 244968 16384 16 11029 10253 570372 380086 16384 32 18128 25226 312587 183014 16384 64 18548 34359 554279 529267 16384 128 22227 37560 1105084 881427 16384 256 50599 49783 942591 821582 16384 512 35869 58517 557467 669253 32768 4 5370 5734 235542 209740 32768 8 9415 10521 537436 255849 32768 16 19994 19407 537102 502438 32768 32