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 May 19 10:57:31 2026 Auto Mode Machine = Linux oleg151-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-oleg151-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 1650 8460 532815 331481 64 8 2766 6226 821391 532815 64 16 1799 3558 983980 752329 64 32 2228 15724 1138375 939223 64 64 2533 32272 371894 1484662 128 4 3713 5546 554157 399812 128 8 8320 13985 757430 992724 128 16 4584 35437 907174 753179 128 32 5218 20671 1217930 852438 128 64 2208 28418 1421023 1319723 128 128 3512 93096 1185654 1802755 256 4 5011 3456 661657 593947 256 8 3205 4479 80353 729540 256 16 2973 12560 1248819 962301 256 32 4010 13617 775933 948698 256 64 8684 26792 235067 306188 256 128 3881 50128 733527 1163562 256 256 10723 56190 1683493 1743637 512 4 4590 2676 144225 97840 512 8 3145 5626 705062 662230 512 16 6203 7326 928920 280394 512 32 12641 26178 1017858 282868 512 64 12123 14951 700463 336606 512 128 11485 18857 804962 1207940 512 256 11066 52853 65498 87268 512 512 15705 42616 203730 543006 1024 4 2887 5546 190187 195458 1024 8 5022 6081 603835 186318 1024 16 7140 14774 234379 205709 1024 32 19883 40170 430236 984676 1024 64 18271 20698 1657133 133821 1024 128 20380 37402 809484 245261 1024 256 21354 36919 1430318 377851 1024 512 26117 82927 953418 1492445 2048 4 1967 2842 195160 71759 2048 8 11302 10020 438915 638191 2048 16 13211 7376 444434 871826 2048 32 18917 31824 324972 328100 2048 64 27155 25945 1257160 520702 2048 128 21985 21055 771656 1209712 2048 256 32728 31382 193228 1297807 2048 512 41850 32005 135899 1395193 4096 4 3799 4396 257253 109288 4096 8 8587 8502 471083 415627 4096 16 19798 23060 703637 1469645 4096 32 16471 15971 332146 448820 4096 64 55593 36191 1582551 524723 4096 128 19254 50939 1849922 297050 4096 256 28145 23937 1657519 380070 4096 512 31177 35418 644652 472756 8192 4 8399 3998 291716 258307 8192 8 8435 8338 257083 296092 8192 16 17019 15134 617427 647432 8192 32 14455 25128 299108 980955 8192 64 24544 25943 622066 594142 8192 128 17816 21703 402773 255647 8192 256 27395 33334 951455 557201 8192 512 18844 40289 710810 446945 16384 4 3284 4119 116362 155029 16384 8 7195 8451 302065 222581 16384 16 11466 11593 314696 275783 16384 32 14317 15106 333932 331847 16384 64 18766 20920 878352 605763 16384 128 23544 39530 350407 276220 16384 256 26278 35359 333910 604038 16384 512 22367 26989 1102850 713184 32768 4