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: Mon Aug 10 01:18:01 2026 Auto Mode Machine = Linux oleg441-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-oleg441-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 3851 5961 577521 592827 64 8 2543 16436 852702 855419 64 16 3988 41102 760859 855419 64 32 5273 35437 1033216 1204796 64 64 3526 46751 1638743 1638743 128 4 3818 11494 138233 355589 128 8 4932 13224 889145 490380 128 16 6793 24620 870405 877518 128 32 6185 43359 1349580 1152564 128 64 4466 19931 1349580 590094 128 128 5373 62225 1561553 1778862 256 4 5179 10281 671589 251945 256 8 5513 13190 933846 800221 256 16 5325 11752 331217 613985 256 32 6359 15641 1319408 1147398 256 64 14799 30382 1445521 1354356 256 128 7761 41995 278618 384329 256 256 9462 48641 1112909 2081678 512 4 3408 6699 448719 132089 512 8 3633 8910 364920 571472 512 16 4939 13590 950295 1060063 512 32 7473 19455 1418599 1094088 512 64 21101 60607 1418599 1426135 512 128 8582 28329 1684557 1344020 512 256 14487 81154 1506154 1380303 512 512 27034 83687 1684557 1339827 1024 4 3702 7050 272699 271475 1024 8 12794 17616 456920 270399 1024 16 14527 25090 654341 333439 1024 32 10302 17041 1203137 675011 1024 64 20496 58225 1060013 470124 1024 128 30017 63162 1146607 945443 1024 256 26490 68604 1088213 909410 1024 512 33153 74984 622566 670062 2048 4 3680 6720 215871 327674 2048 8 14366 8740 251876 358290 2048 16 25531 26402 610783 337219 2048 32 23895 47716 427470 549340 2048 64 34666 49339 290123 663222 2048 128 35054 36067 511890 406435 2048 256 45466 78440 825177 888141 2048 512 42441 74730 1248028 208110 4096 4 6746 8241 244637 406472 4096 8 13264 15238 250688 328890 4096 16 11602 30689 312385 280392 4096 32 21341 41239 842984 406030 4096 64 22552 39813 890619 475780 4096 128 44245 64702 811067 485378 4096 256 45165 78530 626207 614185 4096 512 49587 74175 708658 615108 8192 4 9355 8663 375053 387035 8192 8 11598 9333 396842 401315 8192 16 22094 15122 565547 480644 8192 32 2965 25165 583309 1041841 8192 64 24462 23782 462434 449318 8192 128 28398 37831 955450 398582 8192 256 33151 56189 1412887 201499 8192 512 22429 46448 571302 352101 16384 4 5891 7656 358315 337029 16384 8 12864 14508 365926 444950 16384 16 19367 14979 331741 316110 16384 32 14721 32670 1007014 675463 16384 64 18250 24475 748881 583264 16384 128 32159 39383 1242716 944210 16384 256 34750 37110 1119359 744694 16384 512 36028 42538 1067921 806852 32768 4 7797 8914 286779 364566 32768 8 10621 9569 352256 251247 32768 16 15266 24587 886509 628304 32768 32 19282 22252 562520 428216 32768 64 27143 45886 923482 755164 32768 128 27523 40816 554055 728551 32768 256 29928 36470 1092990 852779 32768 512 30554 41279 1201034 916719 65536 4