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 8 00:13:45 2026 Auto Mode Machine = Linux oleg637-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-oleg637-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 1425 9195 12482 659861 64 8 3470 25734 718114 148159 64 16 1627 37226 1124074 811459 64 32 2236 35067 1226821 1087638 64 64 6228 69636 538156 1879725 128 4 5426 12279 310724 274080 128 8 4045 16196 492629 767171 128 16 4320 12111 581781 940549 128 32 9367 31976 1007629 472262 128 64 8462 63907 1130717 1306873 128 128 7080 26963 1114289 2004703 256 4 3281 8692 254211 531080 256 8 6788 28165 833776 473054 256 16 10414 44951 547044 139215 256 32 5245 19556 1117543 944525 256 64 5046 53679 537729 958864 256 128 6299 42526 1479379 1173737 256 256 8144 77198 1495866 2210228 512 4 8778 12171 641651 79699 512 8 5616 10437 750656 450318 512 16 15572 28812 315074 415228 512 32 15866 33115 1309596 1055894 512 64 15367 42171 1402845 1166599 512 128 18776 35121 1422357 429170 512 256 12885 67376 924123 832420 512 512 17870 35140 1616100 722376 1024 4 4990 11484 349616 149531 1024 8 13969 7566 835303 105220 1024 16 10861 10410 932714 503938 1024 32 9115 16421 932714 509195 1024 64 11183 48509 1264413 443474 1024 128 18378 33349 1311117 1192117 1024 256 22384 54592 501466 451066 1024 512 23184 62915 906148 1523683 2048 4 7841 5559 268135 164156 2048 8 12422 11970 219037 330804 2048 16 10333 13156 287762 246039 2048 32 12595 24769 570653 558193 2048 64 18951 30960 1293702 584635 2048 128 19917 24581 391808 1084751 2048 256 24699 28786 299063 1476490 2048 512 41294 63618 539948 1607456 4096 4 6238 8799 346320 306177 4096 8 16634 17379 255741 544669 4096 16 17659 31010 410708 630435 4096 32 27812 22430 841952 511613 4096 64 30005 30726 322494 399766 4096 128 31680 39655 1005387 529608 4096 256 29665 48680 977806 669942 4096 512 33536 61406 758365 688301 8192 4 8478 8478 238285 150477 8192 8 7174 2543 331568 479036 8192 16 22307 23791 359487 600539 8192 32 21093 37752 1149085 554790 8192 64 26978 38022 442120 771525 8192 128 34683 52132 671576 972597 8192 256 39649 48569 690081 794485 8192 512 33955 48233 1157056 774586 16384 4 7121 7264 278479 230073 16384 8 10619 12760 380688 324789 16384 16 16704 17795 631387 588655 16384 32 23212 29550 453762 471511 16384 64 25446 33075 924086 504075 16384 128 27525 29935 521883 528226 16384 256 29733 48343 529112 926802 16384 512 35060 42171 902495 572086 32768 4 6373 6581 447338 282897 32768 8 13361 13714 373071 640753 32768 16 17793 22762 712411 506783 32768 32 22278 35131 596063 387567 32768 64 30201 37495 477409 494879 32768 128 32346 40177 667319 724859 32768 256 43222 57403 1522181 757327 32768 512 38432 63974 1121073 1117527 65536 4