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: Thu Jun 11 19:04:14 2026 Auto Mode Machine = Linux oleg101-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-oleg101-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 1200 3672 627470 441646 64 8 3173 14977 640954 1049372 64 16 3391 18084 969761 769584 64 32 4254 17102 1049372 789967 64 64 4580 49382 1143223 1690338 128 4 5141 2307 592699 35311 128 8 6371 16249 499970 735635 128 16 5358 12816 976473 859260 128 32 5383 37570 1196221 853794 128 64 5828 42595 1294270 1254941 128 128 8147 21955 1579934 1905110 256 4 6221 8906 520272 632056 256 8 6592 17218 664935 770920 256 16 10789 22413 1080434 924200 256 32 14494 61969 969251 431775 256 64 4547 38536 1340826 1208072 256 128 6115 60592 1495866 453092 256 256 4044 41491 678807 2118645 512 4 6609 5790 421421 413948 512 8 5476 18362 596721 624485 512 16 11161 21408 528962 718268 512 32 20534 44999 1185272 870905 512 64 16120 56400 813808 1066910 512 128 23020 103834 275254 1112797 512 256 9244 82726 245544 689001 512 512 24294 84143 1795846 2124526 1024 4 3889 6804 784067 336179 1024 8 6186 5105 802526 337633 1024 16 20104 28717 209287 885048 1024 32 17860 41009 635180 693765 1024 64 26210 39730 1033237 797608 1024 128 19615 135181 999107 835303 1024 256 33328 64586 1004011 965203 1024 512 36311 67944 1270397 1454537 2048 4 7736 4737 380880 149674 2048 8 9477 17947 290998 250028 2048 16 14601 24863 356476 366171 2048 32 33762 19284 553803 706710 2048 64 30037 45020 811381 833585 2048 128 22659 21221 717333 532352 2048 256 20294 53925 740907 442830 2048 512 13673 60228 1417292 386206 4096 4 4697 5146 283104 236997 4096 8 5916 8969 289775 427734 4096 16 11857 9771 212459 313130 4096 32 23071 12931 176195 371185 4096 64 14729 29657 1399832 328783 4096 128 36281 39178 1183120 566061 4096 256 23293 64019 613724 733655 4096 512 22662 55286 351680 667754 8192 4 5757 1958 303733 230435 8192 8 7111 11779 468111 371754 8192 16 11709 15966 415164 360562 8192 32 17024 12344 659473 576623 8192 64 22696 24468 507493 546165 8192 128 32002 37142 787402 673894 8192 256 31185 54661 844368 744735 8192 512 33309 44294 697011 637214 16384 4 3822 4776 216227 181772 16384 8 7008 10390 368809 358747 16384 16 14150 15475 639900 664798 16384 32 20498 18654 684035 594290 16384 64 25459 25280 885379 549229 16384 128 22466 33873 472910 455817 16384 256 23528 27255 930379 581836 16384 512 25857 34304 718058 331191 32768 4 4524 4911 302829 230329 32768 8 7221 7490 434420 320125 32768 16