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 Aug 27 10:48:47 2026 Auto Mode Machine = Linux oleg450-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-oleg450-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 2182 8048 560635 488236 64 8 3904 16657 743988 397208 64 16 5444 7974 929467 133033 64 32 5738 54606 1226821 380864 64 64 6706 65046 1066042 1638743 128 4 4235 10860 631014 181817 128 8 2472 8034 824932 627328 128 16 7393 17447 859260 753179 128 32 12392 31295 352785 337695 128 64 8368 87798 976473 1266785 128 128 13014 74723 1406136 1755594 256 4 5940 4302 150493 232119 256 8 5288 5711 563997 64875 256 16 10476 29784 691930 159906 256 32 9515 26026 842278 913973 256 64 9503 52544 1158540 955451 256 128 6706 18401 1340826 1123389 256 256 12735 53976 1445521 1652404 512 4 5613 4904 158277 85834 512 8 7805 11272 792778 521385 512 16 10321 14456 551654 512916 512 32 13234 33076 1140576 261479 512 64 19276 44118 1270846 1034032 512 128 23086 78611 1196499 1118011 512 256 27979 66354 951558 1014013 512 512 28016 86137 1030064 1551867 1024 4 4659 5828 209922 207368 1024 8 7550 10904 469302 597784 1024 16 17516 27239 948157 869989 1024 32 18437 14548 1147832 937805 1024 64 20183 55270 1110440 1076755 1024 128 27157 40892 1027060 436311 1024 256 36580 48808 1420384 1030263 1024 512 28994 46613 217358 242834 2048 4 4112 6819 189189 194567 2048 8 8478 14611 193533 779004 2048 16 15751 24724 776048 381880 2048 32 17648 28692 758774 249172 2048 64 24199 36191 584158 800940 2048 128 19040 50057 894337 211680 2048 256 33482 43590 798780 937683 2048 512 29323 49411 538256 295869 4096 4 7023 6258 314979 199668 4096 8 7095 12401 135867 393277 4096 16 13447 16744 310774 230087 4096 32 14834 31659 635143 358198 4096 64 18830 28262 572475 686678 4096 128 25554 37279 326819 290328 4096 256 23711 46921 441564 629557 4096 512 34331 37875 632198 646374 8192 4 5494 6141 261166 131475 8192 8 12445 16671 549907 542989 8192 16 19265 24325 554674 484357 8192 32 16116 28775 316832 488260 8192 64 15123 27618 339721 337831 8192 128 28828 38524 566405 508695 8192 256 26586 44198 1349144 366813 8192 512 34906 45473 621920 441189 16384 4 5613 6504 220996 309733 16384 8 10948 10593 214838 282522 16384 16 13140 19027 518857 494866 16384 32 27230 24716 413402 548931 16384 64 33636 31961 269292 645751 16384 128 30260 35132 388476 435245 16384 256 29317 41401 535391 769097 16384 512 33377 39271 861364 759290 32768 4 4964 6694 362309 250684 32768 8