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 Oct 22 09:59:57 2025 Auto Mode Machine = Linux oleg329-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-oleg329-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 12098 19699 323102 190001 64 8 18745 36657 420873 710511 64 16 17246 36823 627470 511494 64 32 21519 69781 771797 710511 64 64 25029 81944 987600 1101022 128 4 18467 30447 216934 438331 128 8 25476 31730 770474 339403 128 16 28757 57475 581781 508012 128 32 35388 79210 1557024 962469 128 64 57371 127498 1067750 1885042 128 128 40494 172305 2098744 1424795 256 4 15997 24343 389064 332860 256 8 27957 41940 550409 369388 256 16 39288 70837 612235 496917 256 32 58822 101069 1036624 716876 256 64 53838 109255 1319408 1098113 256 128 57527 136247 1422540 1430119 256 256 65773 175338 1361224 1911233 512 4 18435 21132 371292 448344 512 8 28661 35546 431325 414908 512 16 46912 67635 966113 786391 512 32 55472 123434 1096322 1108203 512 64 85235 140039 1467055 1361920 512 128 75061 170776 1333173 1177473 512 256 98958 162027 1954379 2116152 512 512 87807 167056 2065273 2124526 1024 4 22286 23535 331278 245794 1024 8 32242 41256 729840 417643 1024 16 48156 59259 878171 703769 1024 32 71434 109309 913471 782781 1024 64 71894 155317 1406891 1054547 1024 128 86230 203738 1338494 1738286 1024 256 91306 134774 1492963 1296474 1024 512 93379 214847 1622698 1652033 2048 4 20928 21211 443951 302156 2048 8 36061 40852 439027 409926 2048 16 59098 58449 864108 822175 2048 32 65532 89156 1185177 1020933 2048 64 79757 116410 1284033 1109551 2048 128 108303 121405 2015562 1258818 2048 256 84975 139947 1479797 1356204 2048 512 100367 175284 1741742 1449580 4096 4 18664 20090 274993 269277 4096 8 32783 37303 536471 457961 4096 16 47767 61541 733248 742181 4096 32 63895 88853 1079082 908804 4096 64 72119 110568 1176960 953017 4096 128 81753 121618 1292515 1150555 4096 256 86198 142029 1324298 1566390 4096 512 87693 155057 1468138 1325524 8192 4 19003 21578 342703 312813 8192 8 33090 40350 492099 512473 8192 16 53343 70218 794963 891307 8192 32 72644 93034 1244025 917071 8192 64 91682 132333 1108063 1280369 8192 128 105037 154057 1726116 1581153 8192 256 123953 165134 1586995 1330493 8192 512 111524 169424 1903818 1720670 16384 4 21748 26743 374662 402475 16384 8 40848 44579 785582 592486 16384 16 58694 65915 912308 876570 16384 32 87552 100604 1546836 1132194 16384 64 102746 150982 1690648 1526224 16384 128 111918 173449 1924117 1489859 16384 256 128707 185347 1997554 1712045 16384 512 127555 186232 2191882 1617545 32768 4 21351 25569 313410 349891 32768 8 35493 38845 636247 539099 32768 16 60376 70836 1001531 965664 32768 32 80557 92874 1068650 1009743 32768 64 88039 118885 1272196 1205057 32768 128 99064 138714 1568296 1450362 32768 256 113107 154640 1617217 1563728 32768 512 119661 162743 1887461 1492704 65536 4