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: Fri Oct 31 22:12:35 2025 Auto Mode Machine = Linux oleg129-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-oleg129-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 14496 15963 219165 343792 64 8 23391 34575 457452 221516 64 16 26250 64983 587635 471099 64 32 25963 74590 942521 889431 64 64 27982 101265 1562436 1392258 128 4 15153 24493 233950 269404 128 8 25136 36046 361576 386848 128 16 37069 54099 1032829 612303 128 32 43450 106929 969421 814915 128 64 56460 110154 1175271 1755594 128 128 51613 147136 1266785 1359835 256 4 16637 19914 256826 269729 256 8 28287 35960 459491 579209 256 16 42132 83037 1224606 603970 256 32 53916 78188 867455 856386 256 64 45501 108296 1829808 1058076 256 128 54191 138909 1384034 1325925 256 256 65492 197858 1579483 3245838 512 4 21249 23192 346658 265160 512 8 34770 40625 401563 359302 512 16 63848 73627 664895 893740 512 32 72022 87656 926116 862164 512 64 89059 135558 1821745 1344020 512 128 104679 145210 1528669 1236455 512 256 127653 255871 1778004 2486072 512 512 102771 171526 1667552 2169601 1024 4 19604 26487 485317 351044 1024 8 42053 40894 821719 413064 1024 16 55450 69263 1023877 979958 1024 32 73541 119305 1241389 775152 1024 64 89253 145125 1131503 1617808 1024 128 112169 175585 1294520 1175799 1024 256 101256 161060 1523683 1448162 1024 512 102215 205916 1490373 1703807 2048 4 20163 24228 303501 324972 2048 8 39329 38380 613882 607543 2048 16 51373 67900 709161 719075 2048 32 75136 93918 1026545 804089 2048 64 82581 130320 1125249 1027036 2048 128 108290 139938 1397008 1198237 2048 256 114209 157308 1491617 1663489 2048 512 89950 191275 2245848 1928672 4096 4 20928 21677 332544 256416 4096 8 38889 43289 589102 755464 4096 16 56363 73696 919210 824456 4096 32 73381 117031 1321344 1257142 4096 64 94208 111410 1671062 1264545 4096 128 105263 174194 1623529 1089968 4096 256 112139 170332 1653531 1220871 4096 512 115729 142787 1770061 1539855 8192 4 20647 22058 250122 284878 8192 8 34353 39569 516844 478982 8192 16 50790 60401 895115 814003 8192 32 67500 78278 1122801 853068 8192 64 87303 125152 1312151 1028494 8192 128 90613 148456 1490221 1556513 8192 256 108359 133237 1697547 1360576 8192 512 98158 144530 1964108 1613526 16384 4 20198 23208 288531 300634 16384 8 35910 39698 568099 564965 16384 16 52439 61502 741088 695092 16384 32 81188 91768 1315461 1168941 16384 64 96616 125716 1394135 1260218 16384 128 101909 150771 1063196 1413259 16384 256 118923 159026 1767803 1614960 16384 512 104248 157356 2037593 1355525 32768 4 19710 21753 319644 308494 32768 8 34480 38185 529556 527164 32768 16 53147 69506 1119813 826497 32768 32 79651 93721 1043331 970128 32768 64 103659 122688 1351989 1140148 32768 128 108192 155422 1929921 1391479 32768 256 122427 192067 1677746 1544417 32768 512 123909 163785 1836343 1583310 65536 4 21547 23404 402092 386595 65536 8 35926 39045 651898 577237 65536 16