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: Wed Feb 18 13:36:41 2026 Auto Mode Machine = Linux oleg447-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-oleg447-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 9510 21753 215471 116366 64 8 15488 32970 277078 220788 64 16 17158 66250 503814 370355 64 32 20421 68013 673098 633392 64 64 18840 106277 821391 1138375 128 4 14362 20748 152745 119389 128 8 17000 34708 229843 236631 128 16 21929 52957 505620 600657 128 32 25837 77428 633995 556454 128 64 24128 110836 739689 771581 128 128 14727 101992 1133103 2027414 256 4 13208 18161 146549 132286 256 8 21274 34910 305839 238143 256 16 27344 41283 395659 412849 256 32 44190 94989 691930 891956 256 64 37674 130612 958864 746272 256 128 59966 126982 1237306 1814348 256 256 63762 212252 1391207 2170027 512 4 14353 20069 153569 140039 512 8 20555 31374 322019 307494 512 16 39647 49149 458002 459964 512 32 54491 107628 533827 1082507 512 64 58601 121245 1312798 948197 512 128 43003 113775 1049187 1227971 512 256 100907 152284 1484293 1387437 512 512 80833 219561 1652157 1968713 1024 4 19627 18649 169535 129621 1024 8 26187 39646 426477 393715 1024 16 44521 59204 591527 540056 1024 32 68858 104607 621395 678102 1024 64 80069 128561 924283 1006836 1024 128 65114 164106 1546729 1390944 1024 256 75970 167537 1995982 1494522 1024 512 90244 140446 1882266 1444266 2048 4 18179 20510 144235 199280 2048 8 26173 36449 365190 301044 2048 16 48797 59149 340427 448120 2048 32 71078 81982 954351 558629 2048 64 91204 137995 1364606 1226466 2048 128 92741 164222 1375532 1593737 2048 256 113355 159117 1994039 1961259 2048 512 93760 225104 1809243 1555075 4096 4 19700 20644 185692 169115 4096 8 30888 35520 369302 406433 4096 16 55197 63224 552997 551789 4096 32 70703 90315 907221 863231 4096 64 104905 136839 1027884 995368 4096 128 110792 157199 1172302 1260278 4096 256 121741 171639 1778674 1359510 4096 512 110606 179538 2123381 1789419 8192 4 18477 19583 191464 181532 8192 8 30938 32369 317493 288125 8192 16 48875 56779 540546 496127 8192 32 66502 90708 828468 830149 8192 64 83663 121935 1456859 1162655 8192 128 108749 142568 1545660 1259714 8192 256 108299 153046 1513657 1340093 8192 512 109496 170769 1918487 1536949 16384 4 17950 19379 183897 154817 16384 8 30783 31772 316286 325299 16384 16 48251 56136 500167 508280 16384 32 70407 93440 867617 773852 16384 64 90936 100343 1041712 694705 16384 128 83553 134372 1355632 1358661 16384 256 116158 152558 1885576 1320644 16384 512 105171 161517 1956325 1824694 32768 4 17741 18222 175423 164300 32768 8 30648 32877 283784 261351 32768 16 47856 54282 511465 503093 32768 32