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 Jul 15 10:06:42 2026 Auto Mode Machine = Linux oleg404-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-oleg404-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 6681 15979 789967 571375 64 8 7731 29369 818885 727850 64 16 6494 39923 1013707 581273 64 32 10698 41561 1879725 901377 64 64 6069 58766 1363961 1599680 128 4 8394 19764 673778 483316 128 8 12046 26716 1172704 618653 128 16 13657 40212 1294270 542400 128 32 14273 66078 1455701 757430 128 64 16351 105853 831319 1294270 128 128 18481 93355 1622919 2035099 256 4 9485 17040 395076 606700 256 8 13413 25853 705107 794889 256 16 22379 54794 805021 526910 256 32 25850 90973 1168627 1058076 256 64 23061 98991 1422540 1506359 256 128 25229 103305 1802167 1649865 256 256 35874 118963 1662639 1911233 512 4 14215 16811 611852 537299 512 8 19155 29364 888930 1264113 512 16 33496 52598 1118011 1236455 512 32 29880 65472 1207940 1047141 512 64 42967 78216 1875849 1679288 512 128 37971 130881 912733 1312798 512 256 48512 135344 1560891 1952602 512 512 44889 120126 1795846 1999881 1024 4 15500 17118 678530 748538 1024 8 23899 29452 1420384 1129123 1024 16 40811 45733 1558516 1146607 1024 32 51683 72429 1233545 1205839 1024 64 47374 93336 1262555 818587 1024 128 53439 124923 953630 1602715 1024 256 54054 143477 1381993 1301187 1024 512 50703 145909 1786736 1950656 2048 4 15124 17464 758774 526060 2048 8 24895 30803 946360 935640 2048 16 40029 49193 1153196 1166982 2048 32 53626 72178 1424106 609526 2048 64 64343 106572 1528239 1342847 2048 128 77870 121940 1581414 1278301 2048 256 79100 126146 1701042 1705094 2048 512 74281 110078 1823453 1593737 4096 4 15495 16492 891821 625545 4096 8 24928 29737 903784 921478 4096 16 39570 49743 1198388 877114 4096 32 50143 70341 1199811 1426685 4096 64 66656 91649 1246832 1266129 4096 128 70049 113891 1444316 1252194 4096 256 76625 126170 1984550 1559848 4096 512 87150 128376 1452498 1466509 8192 4 15389 16274 724891 604437 8192 8 25713 29907 1007238 787691 8192 16 40924 44245 1206841 943565 8192 32 55292 69278 1382585 1109423 8192 64 71550 94464 1830683 1277845 8192 128 71567 97266 1505632 1258930 8192 256 87140 111260 1476834 1138236 8192 512 78946 117699 1898138 1464684 16384 4 15716 16083 679833 637266 16384 8 26117 27070 973035 684949 16384 16 38218 45065 1292428 1000854 16384 32 53153 67070 1586073 1175318 16384 64 66396 82198 1637745 1391087 16384 128 72376 105461 1531496 1402157 16384 256 81753 113284 1671485 1262742 16384 512 85094 107113 1602158 1464834 32768 4 15375 16312 703311 659420 32768 8