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 11:03:32 2026 Auto Mode Machine = Linux oleg243-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-oleg243-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 3933 6118 621657 524487 64 8 5358 11562 952555 303383 64 16 3693 14456 799377 703068 64 32 2832 93701 1421755 763021 64 64 3068 87443 1232453 1304314 128 4 7479 10926 506097 45762 128 8 4204 25162 805138 731625 128 16 4941 40945 992724 1007629 128 32 12921 40366 1521718 756363 128 64 4797 96458 789741 1231904 128 128 13282 43581 1543594 1579934 256 4 3241 10048 686182 331524 256 8 14656 22131 833776 603630 256 16 14954 32644 962301 537999 256 32 14176 16818 958864 1321031 256 64 15272 61745 1243036 49602 256 128 29840 104279 1523457 1319408 256 256 8529 117711 1487577 2065659 512 4 10792 14221 374269 455573 512 8 13868 19997 934580 792486 512 16 24574 40080 1078159 282088 512 32 6613 59807 1245780 628138 512 64 22413 72572 1753325 866338 512 128 21566 74074 1479181 1450212 512 256 24836 77776 1096322 1556366 512 512 15876 125095 1657257 932550 1024 4 6600 7080 89926 317914 1024 8 10661 17475 879070 344899 1024 16 26528 35228 321099 991266 1024 32 27726 35934 1385560 294179 1024 64 41548 83123 353704 1397280 1024 128 46758 56174 1219189 1338494 1024 256 40324 108278 1715375 1508167 1024 512 32687 106046 1768345 1121458 2048 4 7015 6191 151782 121947 2048 8 11485 16212 497424 373787 2048 16 25255 21206 1168252 261387 2048 32 21454 20526 763291 1134613 2048 64 37880 41396 875201 817559 2048 128 30987 62036 1458688 986463 2048 256 18307 51971 646257 470171 2048 512 25964 37244 1713598 864543 4096 4 4009 5017 213176 294716 4096 8 16158 15734 253638 328676 4096 16 12685 17198 381022 153985 4096 32 23014 18592 464135 398172 4096 64 17053 43732 1011127 451142 4096 128 26003 42348 340709 585149 4096 256 26496 51670 662782 562337 4096 512 37900 58101 279552 757964 8192 4 7739 5714 417641 223141 8192 8 6929 17763 609801 325081 8192 16 16276 15127 754946 465775 8192 32 22769 26088 1072240 645243 8192 64 29386 42889 776933 427068 8192 128 35430 52026 1219606 817314 8192 256 35195 61759 895302 964002 8192 512 39158 55713 1057196 849609 16384 4 5761 8711 469858 374834 16384 8 10684 11690 523865 521899 16384 16 20434 22952 798165 315167 16384 32 24716 31741 329307 532054 16384 64 33302 43456 1075560 779045 16384 128 44321 51144 1059769 874051 16384 256 39512 49354 1119669 564283 16384 512 35010 68271 1285225 774584 32768 4 6804 6630 261961 460989 32768 8 8970 12837 577125 332774 32768 16 22133 20471 560788 431590 32768 32 21417 31528 792603 673061 32768 64 30194 46897 1071650 1101663 32768 128