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: Tue Jun 9 05:30:19 2026 Auto Mode Machine = Linux oleg253-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-oleg253-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 3130 8434 500060 587635 64 8 3468 17052 760859 688639 64 16 4764 21340 983980 688639 64 32 5080 55032 1255511 1049372 64 64 3543 49382 1255511 1879725 128 4 4873 7438 640042 472262 128 8 4816 12990 406164 770474 128 16 4170 10789 1030846 166843 128 32 6834 29116 1142750 1133103 128 64 7046 99002 1727352 2286447 128 128 10108 103149 785122 2098744 256 4 5007 3564 561637 295649 256 8 8195 20525 533190 812329 256 16 8046 24715 1062263 458902 256 32 3824 49023 652807 697322 256 64 11978 28073 1208072 638445 256 128 17249 40763 1089202 1523457 256 256 13776 75964 1718521 2187712 512 4 9716 10494 1053821 296826 512 8 9457 17168 997991 616772 512 16 15427 24970 1064266 935801 512 32 19917 41300 722133 788992 512 64 24459 65016 1438555 971797 512 128 18373 44390 1527582 543968 512 256 22136 58320 1610042 885996 512 512 27156 81049 1347393 884172 1024 4 8938 7382 296208 122780 1024 8 11439 7338 453303 771670 1024 16 15412 32553 949834 557729 1024 32 25785 45410 1247157 686776 1024 64 32341 44046 1316341 1064479 1024 128 25140 72336 1592612 1117955 1024 256 33893 28809 1580306 1452570 1024 512 12275 68271 1698417 1809317 2048 4 6580 5857 222676 395524 2048 8 8092 7710 268874 749113 2048 16 10257 14856 244805 984654 2048 32 9006 22034 338348 1075111 2048 64 24347 19925 154088 517035 2048 128 13558 29591 180791 1272054 2048 256 13319 98594 787720 1497076 2048 512 53330 63075 268344 456940 4096 4 5353 4458 295441 269370 4096 8 6288 9236 510594 320748 4096 16 8559 11357 192798 472873 4096 32 24939 16704 648081 458058 4096 64 17090 38145 1497703 694478 4096 128 38657 25847 1621536 813679 4096 256 36734 47419 392900 570554 4096 512 31959 32717 1785514 721000 8192 4 4397 4592 353103 327523 8192 8 2686 7176 339369 368924 8192 16 9852 12130 493732 474020 8192 32 13509 22119 654685 392975 8192 64 16268 26154 516526 261116 8192 128 14940 36537 909112 724769 8192 256 27637 37716 697832 342905 8192 512 24867 27330 445311 531844 16384 4 4344 3897 250542 238837 16384 8 11016 14688 596954 262030 16384 16 16718 13879 804481 628949 16384 32 14592 19810 337424 174097 16384 64 24353 27447 552412 373143 16384 128 29499 39193 1090529 620795 16384 256 33861 37677 909868 797664 16384 512 25187 47590 694207 489103 32768 4 4786 6364 255566 267988 32768 8 7853 8797 354022 224650 32768 16 12358 20830 598753 593248 32768 32