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: Sun Nov 16 19:52:21 2025 Auto Mode Machine = Linux oleg411-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-oleg411-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 1600 15744 152710 280553 64 8 4329 32487 181276 336889 64 16 9869 49684 653436 560635 64 32 6541 76112 877797 763021 64 64 4444 90145 983980 695778 128 4 9329 19021 123794 182621 128 8 8329 29560 363781 365764 128 16 7080 54538 780556 263973 128 32 12427 73184 174150 831319 128 64 13496 93420 1217930 1114289 128 128 6737 99627 1346196 1618028 256 4 5638 18017 292907 248045 256 8 14399 35121 418971 401277 256 16 19424 31300 577962 575175 256 32 13450 84794 944525 739590 256 64 17988 91492 966633 934659 256 128 25253 150303 1487577 1260547 256 256 11475 154588 1514860 2000242 512 4 10935 13091 253725 229191 512 8 16056 30908 461248 387576 512 16 30700 58546 669247 531712 512 32 34794 49723 197910 806474 512 64 29447 37816 1199171 856319 512 128 43802 116680 1361057 1344020 512 256 22860 156330 1501940 1084694 512 512 19480 128739 1528669 708318 1024 4 8635 14124 197607 287735 1024 8 18480 27567 476963 443474 1024 16 24139 56418 418947 649688 1024 32 45020 68284 574285 210518 1024 64 34334 61664 1311117 1071116 1024 128 34774 71140 1311117 268489 1024 256 54897 100826 1458984 1319577 1024 512 59081 151499 1657133 1450607 2048 4 7523 8213 154160 200153 2048 8 16674 19229 122987 206306 2048 16 26427 17469 285828 287194 2048 32 26774 42950 873688 902986 2048 64 32195 50085 407631 983189 2048 128 41186 54703 1138975 1192747 2048 256 34879 132367 1287111 1318727 2048 512 49904 74706 1518244 1482862 4096 4 9192 11930 128813 94130 4096 8 15588 20430 449619 369572 4096 16 32406 32343 557574 457400 4096 32 39382 42163 907988 382550 4096 64 27407 68195 1032766 828952 4096 128 54836 71034 833051 1206806 4096 256 44194 101736 1296123 1002162 4096 512 47477 53365 1440200 1486172 8192 4 11923 9138 186856 123197 8192 8 20518 23336 422546 372040 8192 16 28504 32597 668792 516487 8192 32 35626 40665 597126 922835 8192 64 34591 39633 356266 704326 8192 128 33776 78961 1124049 625395 8192 256 32176 68656 455163 715905 8192 512 50833 60851 881430 1012999 16384 4 7860 9314 277074 198159 16384 8 14584 18785 270693 224653 16384 16 23869 30355 484230 211660 16384 32 33664 38558 540422 389085 16384 64 31114 34343 911087 816700 16384 128 37350 50104 533889 976755 16384 256 46429 64236 1255085 620722 16384 512 59453 64898 969986 905242 32768 4 8276 9681 226886 256340 32768 8 14190 15919 157356 213883 32768 16 20847 27026 332305 254938 32768 32 33335 36167 383767 515999 32768 64 35146 50255 391806 765873 32768 128 42445 53766 646860 818606 32768 256 41672 50106 1570483 886292 32768 512 40664 50034 1129309 923252 65536 4