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: Wed Sep 2 08:52:23 2026 Auto Mode Machine = Linux oleg114-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-oleg114-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 8639 18790 608965 926260 64 8 15671 33280 1232453 1029254 64 16 15227 46613 546928 769584 64 32 22231 95230 1828508 1734015 64 64 20446 110749 939223 1638743 128 4 15069 18441 600657 524387 128 8 21914 42967 1561553 615814 128 16 25564 56788 1852520 1040839 128 32 19634 75607 2248149 1093856 128 64 33410 136302 1471662 1778862 128 128 26671 117430 1967960 2843510 256 4 17104 22873 1112909 987979 256 8 22743 34363 928195 727070 256 16 38055 56978 1292410 1241598 256 32 43390 74442 1175022 1148625 256 64 47067 160600 1881098 1058076 256 128 62224 129885 2205688 1579483 256 256 57487 151299 2435861 2305128 512 4 15363 18357 781811 766464 512 8 25501 32065 1551867 912345 512 16 38464 64144 1684557 1213400 512 32 53797 76888 1043072 1105920 512 64 70042 123221 1276891 1484293 512 128 56630 149965 1679288 2105777 512 256 74105 163470 1667552 2016784 512 512 78501 220417 2327124 3140488 1024 4 17950 20695 653445 684478 1024 8 26109 28697 1111877 784067 1024 16 43397 58224 1053512 860575 1024 32 58347 78818 1217806 1065535 1024 64 82454 106891 2077065 2085132 1024 128 66325 167701 1744641 1460969 1024 256 93387 132713 1480101 1317553 1024 512 93584 156000 1838751 1506051 2048 4 15451 15020 746898 704277 2048 8 27567 31482 982739 969649 2048 16 43520 46654 1037957 1026055 2048 32 69981 80405 1239742 1371798 2048 64 71710 97246 1537539 1268859 2048 128 92244 122437 1532875 1497076 2048 256 89600 144051 1858164 1396100 2048 512 83759 146296 2120026 1592555 4096 4 17543 17939 678033 780945 4096 8 28181 30919 892794 863405 4096 16 42621 50737 1063057 1067218 4096 32 60627 73522 1193808 1374520 4096 64 71707 108153 1364802 1342932 4096 128 96170 130279 1464009 1523199 4096 256 101549 121687 1861750 1238206 4096 512 100700 125137 1718879 1666362 8192 4 17837 17861 747246 615481 8192 8 29238 33134 1110319 986277 8192 16 47738 55555 1439223 1379587 8192 32 66879 81822 1751546 1828929 8192 64 79682 120108 1663361 1702763 8192 128 90713 140053 1822043 1560685 8192 256 111894 155186 2054663 2080289 8192 512 105005 184321 2199191 1668774 16384 4 18577 18350 586795 688435 16384 8 28341 34267 1274121 912393 16384 16 46990 55007 1149754 1322474 16384 32 68677 81984 1737410 1139592 16384 64 79470 106013 1381079 1273932 16384 128 93861 127950 1543466 1291602 16384 256 104988 138088 1944919 1649261 16384 512 113016 147233 1747973 1866879 32768 4 17833 18952 725693 678272 32768 8 29864 32235 1114745 848866 32768 16 45324 53596 1212381 1132930 32768 32 67968 89250 1935628 1542597 32768 64 88903 110706 1848072 1502363 32768 128 96118 133926 1692372 1403343 32768 256 104367 143236 1473120 1546381 32768 512 108144 151921 1776918 1609434 65536 4