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: Sat Sep 5 11:38:47 2026 Auto Mode Machine = Linux oleg220-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-oleg220-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 3114 11438 639427 491815 64 8 3368 18583 863676 811459 64 16 6583 13588 1049372 855419 64 32 3598 12563 1017549 842003 64 64 3334 50204 1204796 1780008 128 4 5446 6832 684081 434078 128 8 5568 10225 870405 789741 128 16 4429 5672 453896 921183 128 32 5271 24955 522346 907174 128 64 8413 97121 1185654 1007629 128 128 3218 31659 934004 379734 256 4 2690 4200 157745 245437 256 8 6979 4469 831194 815414 256 16 8307 15951 1190657 799625 256 32 13862 22210 1152323 941213 256 64 4781 17516 1422540 1049800 256 128 15000 60093 1422540 609455 256 256 15027 81629 945356 757326 512 4 8099 8639 719954 258303 512 8 17072 24567 928920 756207 512 16 32001 51628 1251589 1476130 512 32 29561 37328 1354190 990168 512 64 40858 128163 748563 2216629 512 128 19868 76247 1480200 2198475 512 256 33831 86589 480764 1293037 512 512 37522 93756 709019 1099128 1024 4 7629 13037 722595 316929 1024 8 17091 21467 467769 258580 1024 16 20738 18731 127773 958739 1024 32 16425 57938 653544 885778 1024 64 38682 42702 1434138 1004716 1024 128 30078 78799 1238168 2020395 1024 256 81353 172510 906148 1172909 1024 512 88095 121310 1656494 1612342 2048 4 14843 21344 563540 433905 2048 8 8620 8244 897045 244450 2048 16 19798 36730 556061 751275 2048 32 54913 53135 1524983 682238 2048 64 47820 81031 553981 558811 2048 128 29675 56359 315217 1347270 2048 256 29776 37097 1452276 674789 2048 512 26511 57951 1004458 632133 4096 4 9408 10638 295441 196084 4096 8 15300 11995 331550 342107 4096 16 12609 16294 222644 206785 4096 32 25746 22891 949016 426449 4096 64 39053 40117 465127 1254114 4096 128 17025 43239 1582697 1313666 4096 256 21814 46794 1745246 439205 4096 512 34101 58676 2307631 535001 8192 4 8440 7584 212140 204182 8192 8 13495 9814 185368 266640 8192 16 32012 41605 707677 512611 8192 32 25603 25408 752384 507808 8192 64 27447 47878 734640 1175664 8192 128 29892 56853 330751 345682 8192 256 22807 59440 521948 718029 8192 512 67892 69991 976966 561444 16384 4 8158 8484 286714 197034 16384 8 11797 7719 278491 205390 16384 16 14509 13808 564538 331386 16384 32 16969 25255 521582 373502 16384 64 24398 51349 876995 576535 16384 128 41250 58687 761377 549045 16384 256 43216 59776 901264 413214 16384 512 22759 31486 327744 426554 32768 4 6301 12581 428389 473074 32768 8 12419 10324 962122 862200 32768 16 34158 22738 1099671 663671 32768 32 26831 28417 795512 747394 32768 64 44618 36397 551251 948863 32768 128 32750 34329 858763 363652 32768 256