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: Thu Jan 22 04:32:55 2026 Auto Mode Machine = Linux oleg311-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-oleg311-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 3344 11504 146063 222250 64 8 3829 13982 453587 415659 64 16 2826 13716 281731 587635 64 32 3584 57299 901377 633392 64 64 4981 41210 743988 809014 128 4 5415 11347 277050 225404 128 8 6134 19219 472262 356533 128 16 6500 31403 653282 579270 128 32 7970 41560 809997 795593 128 64 9369 84429 1133103 1142750 128 128 6077 68193 1359835 1618028 256 4 4507 12496 256458 97561 256 8 7158 12292 241517 104107 256 16 9883 20628 219363 263120 256 32 13183 45755 867455 363634 256 64 12600 50107 1195962 1012194 256 128 11498 52182 1445521 500857 256 256 15956 63856 408918 1237306 512 4 6230 8602 144312 108426 512 8 12189 20721 312370 243125 512 16 17674 34981 645703 265160 512 32 19445 50448 365977 678980 512 64 20681 53629 1442420 1413929 512 128 14082 84894 1459080 1394645 512 256 22009 59848 329075 1630828 512 512 19607 52588 820650 1071167 1024 4 7537 9034 98887 85920 1024 8 16192 11580 132369 156791 1024 16 16915 11006 738372 636781 1024 32 23741 44626 722109 152040 1024 64 28804 20943 420876 484824 1024 128 11838 46131 942952 426646 1024 256 27683 59190 1535668 885048 1024 512 20440 42048 1032244 1654579 2048 4 7570 5233 89273 48688 2048 8 9839 15880 204328 174624 2048 16 21807 27095 420008 222699 2048 32 21078 39726 387146 822490 2048 64 28840 56359 1172398 944591 2048 128 41609 65414 375634 853717 2048 256 50231 70833 258711 992734 2048 512 45262 80993 1676148 2048243 4096 4 9166 9791 164847 113955 4096 8 9060 23357 183119 178203 4096 16 33102 16040 213622 310892 4096 32 25494 34919 545188 285196 4096 64 21080 21172 395132 550975 4096 128 29465 47378 1047820 690708 4096 256 34119 65712 792875 670046 4096 512 38354 67031 1047565 796588 8192 4 5180 5531 54944 92439 8192 8 11666 8101 339718 223057 8192 16 10661 13478 325506 275232 8192 32 31102 36938 361149 460531 8192 64 3087 26593 477837 255761 8192 128 38730 27693 688174 596784 8192 256 43844 35646 959908 876617 8192 512 28285 79001 1252596 628070 16384 4 5965 5834 140873 84512 16384 8 8178 9036 224269 131443 16384 16 21594 26178 271146 235064 16384 32 26040 31649 459036 481020 16384 64 30964 49306 733752 715672 16384 128 27293 39020 540818 559446 16384 256 37414 44149 601005 1026126 16384 512 30924 43219 935203 644274 32768 4 5773 6135 88328 123089 32768 8 13445 9765 148816 187771 32768 16 13137 18526 314707 185481 32768 32 20076 23451 465111 341671 32768 64 22748 22440 630735 579945 32768 128 22774 33340 615289 592795 32768 256 43248 45018 819690 714708 32768 512