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 Aug 8 02:13:54 2026 Auto Mode Machine = Linux oleg104-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-oleg104-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 3404 9082 621657 450541 64 8 3413 27361 763021 651849 64 16 3118 21739 1033216 1452528 64 32 3715 59207 2052169 1049372 64 64 3241 22863 1679761 1638743 128 4 4764 8548 604036 486822 128 8 5602 15931 990891 624409 128 16 6963 24596 1142750 1076312 128 32 10310 46009 284388 1162547 128 64 8050 78526 1196221 1349580 128 128 9055 92694 1487977 1727352 256 4 7701 11266 666586 580461 256 8 4661 5766 304710 695516 256 16 11940 22507 1062263 826078 256 32 8552 37329 1354356 947860 256 64 6863 38214 1173737 1098113 256 128 12143 43821 995306 833776 256 256 8960 81400 1168627 1652404 512 4 6938 13640 566946 484343 512 8 10483 16341 888930 157488 512 16 18570 32730 860437 759416 512 32 24734 54695 1180062 1575781 512 64 17186 78407 1467055 1057974 512 128 22174 82675 1723770 448344 512 256 34789 101306 1270846 593423 512 512 14830 136897 1537424 2768068 1024 4 7066 9405 361687 335523 1024 8 8292 14457 424034 583808 1024 16 16521 18188 1175799 1005892 1024 32 19571 23383 912695 299325 1024 64 36478 85841 1333507 787806 1024 128 14672 32774 743613 686337 1024 256 20350 57586 1622698 598868 1024 512 31043 72434 1851434 413900 2048 4 9678 7894 342640 263270 2048 8 14066 17580 949499 583642 2048 16 20003 25285 817247 825494 2048 32 32797 48292 1449580 1501525 2048 64 30107 28107 1505736 686546 2048 128 40897 61642 986917 489488 2048 256 31555 64299 559575 669947 2048 512 44410 62368 761329 2060032 4096 4 6115 7723 553585 200920 4096 8 12260 17578 625067 432798 4096 16 16898 13808 436526 649846 4096 32 29203 28640 998086 716819 4096 64 31328 35348 525992 733498 4096 128 36937 47630 1558574 961283 4096 256 44961 59455 1603227 585647 4096 512 47134 48621 405111 428502 8192 4 5962 6306 297286 259626 8192 8 8268 7722 216364 379046 8192 16 12152 16059 561793 516712 8192 32 24670 23187 981908 592676 8192 64 24692 47357 1160848 744865 8192 128 34649 43659 619811 398772 8192 256 17117 55484 527906 349728 8192 512 48529 60606 657630 1089650 16384 4 5540 4659 239430 282409 16384 8 5916 11201 644806 562173 16384 16 16084 18241 802471 497946 16384 32 25661 31389 827688 801292 16384 64 23467 34589 679020 908461 16384 128 26901 40765 1001029 673160 16384 256 30226 48365 1201603 1178099 16384 512 42850 52022 337480 461415 32768 4 6407 5465 173778 176803 32768 8 11030 10355 479170 261385 32768 16 17689 16066 715645 747170 32768 32 23923 25975 840267 606961 32768 64 23088 33335 836045 494767 32768 128 24912 27985 752423 664059 32768 256 37135 43374 626037 488498 32768 512 33549 46335 914693 388297 65536 4