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: Fri Sep 11 10:22:46 2026 Auto Mode Machine = Linux oleg655-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-oleg655-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 5226 14065 19346 555990 64 8 2996 10512 811459 710511 64 16 5851 4364 969761 154556 64 32 8321 49492 1279447 966270 64 64 4064 47203 413101 1526887 128 4 7469 4141 314547 481150 128 8 6910 18719 795593 574312 128 16 9175 18145 990891 780556 128 32 13530 58179 1196221 826202 128 64 9025 84046 1185654 1471662 128 128 15266 75831 1521718 1684006 256 4 8550 12391 565185 333791 256 8 9224 8287 372076 298360 256 16 18396 29223 1045710 870974 256 32 6929 32870 1112909 861885 256 64 15260 69020 1600674 1413179 256 128 9421 47285 1718521 1629830 256 256 12221 46731 1561112 2135500 512 4 8151 7994 498509 417976 512 8 14794 21396 168208 233249 512 16 9440 40836 565156 245096 512 32 13349 40425 1075998 1086890 512 64 21635 72873 1528669 1242896 512 128 12880 61171 1160923 1520013 512 256 16740 40761 1361920 537703 512 512 30073 34949 446758 97507 1024 4 5618 8945 399687 184168 1024 8 8004 19400 592261 299430 1024 16 25081 23196 1005892 361961 1024 32 16543 19115 1081363 1010864 1024 64 30999 58033 941093 502229 1024 128 30723 53172 883591 1276817 1024 256 23905 67819 340308 1177088 1024 512 26227 101769 1136593 940269 2048 4 7640 6219 502840 136389 2048 8 11009 12574 406108 271259 2048 16 15648 17029 1211931 498782 2048 32 30544 40504 1307885 386415 2048 64 25725 59293 1017788 883846 2048 128 25140 51220 756835 338789 2048 256 50907 60484 1065642 1500214 2048 512 30160 97015 972833 145370 4096 4 7502 10270 404786 308198 4096 8 11647 12031 421790 383917 4096 16 17291 29755 698629 507187 4096 32 22358 27736 631710 405263 4096 64 24094 47404 618652 293573 4096 128 36514 48148 530573 576490 4096 256 33267 44661 681178 315297 4096 512 38312 43286 866890 615571 8192 4 2164 7430 277515 309517 8192 8 13362 14904 538344 492727 8192 16 21028 23963 518287 697308 8192 32 19370 23810 778712 408826 8192 64 31733 47716 1273205 595130 8192 128 37405 46749 653950 546278 8192 256 37519 52963 872433 376731 8192 512 33436 75006 975247 792963 16384 4 8438 7569 220900 316531 16384 8 12847 15873 385296 539425 16384 16 22686 28303 526683 514056 16384 32 32026 43974 758519 414122 16384 64 48984 59772 680149 605693 16384 128 42844 59748 779408 610043 16384 256 48268 67245 789055 700227 16384 512 52842 83101 699514 723707 32768 4 11437 12489 323634 357874 32768 8 15026 15276 534221 468442 32768 16 21827 23605 415272 615871 32768 32 29879 39655 965983 683480 32768 64 37408 56854 739384 753338 32768 128 51019 57589 926932 741727 32768 256 51616 66649 740923 858404 32768 512 45723 82637 675671 660485 65536 4