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 Jul 16 14:10:17 2026 Auto Mode Machine = Linux oleg348-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-oleg348-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 6930 15234 581273 863676 64 8 6934 32287 752329 1188789 64 16 12976 45169 998622 598110 64 32 10988 34096 1392258 955947 64 64 5698 93701 470274 1638743 128 4 10705 13288 687585 498114 128 8 9037 29130 1471662 559353 128 16 19647 45119 1391557 1278855 128 32 16913 78572 656477 1217930 128 64 14522 94823 1336145 976473 128 128 12024 125004 1622919 1579934 256 4 13789 18796 882426 1108314 256 8 13438 27856 999940 883152 256 16 22313 57462 1108314 1190657 256 32 24169 64762 1422540 1376935 256 64 37405 83088 1479379 1195962 256 128 33320 94189 2463808 261263 256 256 35753 129948 1600674 1911233 512 4 14949 17028 403146 479905 512 8 23030 28263 756207 719230 512 16 20193 43504 1625889 936209 512 32 38905 85821 1471074 1216149 512 64 46869 105679 949875 1344020 512 128 68003 137634 1640796 572691 512 256 58830 126674 1523247 1947291 512 512 32185 146487 1684557 1938502 1024 4 13768 17637 523788 638390 1024 8 23031 31932 993100 973296 1024 16 32878 58073 1580306 1184882 1024 32 45015 60951 1061060 1104727 1024 64 55008 62672 1410588 871401 1024 128 48258 139091 1600327 1283303 1024 256 69306 107892 1471481 2133821 1024 512 69137 125827 1597945 1957770 2048 4 15071 17191 611348 708167 2048 8 23881 30388 1111849 810462 2048 16 41565 48024 841424 1189279 2048 32 53985 73740 1488515 1254956 2048 64 59284 112267 1553950 1446164 2048 128 67167 122014 1468162 663222 2048 256 59238 120110 1662201 1411470 2048 512 75313 147870 934317 1597590 4096 4 16483 17873 652041 629004 4096 8 27696 29959 983685 914854 4096 16 44157 45294 1401316 1057300 4096 32 49820 76372 1448945 1123101 4096 64 63656 107112 2303609 1203256 4096 128 87972 111763 1224526 1207909 4096 256 67524 109483 1795779 1397441 4096 512 78164 101768 1251829 1522659 8192 4 15138 16711 516969 391904 8192 8 24211 30397 949247 892975 8192 16 43518 54269 1438680 1040233 8192 32 56734 66878 1292117 1239895 8192 64 75270 83510 1184009 1189296 8192 128 67922 112620 1849604 1187570 8192 256 93909 129103 1925259 1811190 8192 512 108557 153828 1658944 1686300 16384 4 17033 18399 743445 622561 16384 8 29141 32880 1129310 769528 16384 16 45437 53322 1271833 1211667 16384 32 61423 79440 1444026 1378171 16384 64 76309 100322 1690108 1289663 16384 128 87568 128888 968264 1181766 16384 256 90914 101352 1886249 1427201 16384 512 83712 125473