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: Tue Sep 15 00:00:42 2026 Auto Mode Machine = Linux oleg157-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-oleg157-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 2397 2450 555990 39430 64 8 2473 19365 752329 703068 64 16 1637 41911 1679761 467002 64 32 2835 44378 1892980 1163036 64 64 5104 42414 1363961 2006158 128 4 2285 6378 695603 566435 128 8 4229 14393 1165070 1306873 128 16 7517 28912 1074159 934004 128 32 6586 48137 1294270 826202 128 64 2690 56734 1373754 1363288 128 128 8914 28064 1504659 2140585 256 4 4896 7788 475779 514045 256 8 14834 15224 713067 914752 256 16 6786 10943 404452 1532153 256 32 21487 73711 1213534 750970 256 64 11691 68174 2266207 609801 256 128 12471 105695 1683493 723153 256 256 18471 39299 390763 1855098 512 4 7863 6733 251202 173382 512 8 13381 20816 605299 186854 512 16 13096 26457 1160923 1459080 512 32 20180 51659 737762 936209 512 64 20660 63959 735740 1043072 512 128 28156 63156 1650887 1273861 512 256 22297 78888 1201856 1118011 512 512 17978 52749 1595686 2826358 1024 4 9949 10142 244632 224517 1024 8 13078 19003 364790 323250 1024 16 16833 17193 911920 459560 1024 32 12063 38350 818431 509981 1024 64 11814 82948 1192117 709114 1024 128 32548 75589 517415 672791 1024 256 26052 29713 873705 868581 1024 512 26416 72732 1790460 1668074 2048 4 8821 11820 340602 228852 2048 8 10380 12691 277499 552912 2048 16 12591 21007 1135212 201751 2048 32 12001 79772 1244953 1043759 2048 64 47295 62427 981280 429093 2048 128 21571 66085 1216049 999433 2048 256 46314 64556 1155212 425058 2048 512 22337 28367 1681726 336955 4096 4 5372 6810 250366 313868 4096 8 8790 7266 418982 509202 4096 16 11389 12162 247463 262344 4096 32 10367 26581 448679 485762 4096 64 21959 43278 570630 1298671 4096 128 22286 25744 1583864 700167 4096 256 25670 57365 1689800 1415284 4096 512 19117 28932 1050512 259061 8192 4 5617 6591 245474 158670 8192 8 6944 12019 559907 760561 8192 16 19968 14417 562216 586906 8192 32 28236 35901 740961 567312 8192 64 31893 49387 1105852 549353 8192 128 37192 44940 649598 498445 8192 256 36222 58230 1276231 993693 8192 512 32665 75832 965817 687940 16384 4 7254 6158 346590 304813 16384 8 9946 11391 268317 469832 16384 16 10766 15463 457883 410155 16384 32 14018 20402 553084 477235 16384 64 22397 29622 1177776 414637 16384 128 29953 37328 665313 769881 16384 256 27701 33980 498025 343767 16384 512 48278 36229 544969 868901 32768 4 6730 8927 314625 237871 32768 8 10890 14088 369503 543649 32768 16 20115 14923 545261 496064 32768 32 23741 30527 642583 760807 32768 64 30810 37113 935959 748946 32768 128 35017 46318 461683 382139 32768 256 26000 32281 592593 451703 32768 512 30423 41388 1079529 801328 65536 4