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: Mon Jun 1 14:25:08 2026 Auto Mode Machine = Linux oleg351-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-oleg351-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 3752 3511 598110 647135 64 8 4868 10867 877797 771797 64 16 2468 26846 183381 673098 64 32 7199 37888 54374 1188789 64 64 2360 42161 1562436 1562436 128 4 5230 5939 673778 289604 128 8 3549 10044 921183 776042 128 16 3307 4467 992724 1007629 128 32 7633 14186 1455701 715059 128 64 9765 65746 1332828 1142750 128 128 12480 77294 1504659 2066432 256 4 5690 11112 636930 386126 256 8 7135 15523 894929 792543 256 16 12536 27529 1230218 992545 256 32 16693 43345 339597 1058076 256 64 20799 81922 1112909 1212164 256 128 13225 23279 1740810 526652 256 256 9631 141118 1591186 1718521 512 4 6029 6215 139666 309578 512 8 4431 17858 457904 374791 512 16 7165 31116 479476 890404 512 32 12536 56400 1026126 1064266 512 64 14232 61360 1368865 1216149 512 128 25271 48166 1450212 1361920 512 256 17998 72345 189142 553502 512 512 27330 147585 552363 604447 1024 4 2748 5826 127425 152993 1024 8 12711 7303 433537 622927 1024 16 14042 31203 485043 974400 1024 32 31105 29539 427028 734081 1024 64 15254 56930 370357 1167807 1024 128 32328 62984 969780 1250425 1024 256 42558 44052 989440 1363565 1024 512 19970 104108 767670 269906 2048 4 5533 4682 230894 351171 2048 8 12712 17118 844484 602556 2048 16 29393 19310 560927 492067 2048 32 15105 24832 1271112 1070556 2048 64 23014 24069 450612 465155 2048 128 36460 66444 1440103 835206 2048 256 41179 80547 1258081 516010 2048 512 22197 46111 1135813 1444219 4096 4 11642 12115 473459 350653 4096 8 9513 7544 249345 244742 4096 16 26007 19938 770369 333526 4096 32 46921 16446 466681 592760 4096 64 25584 42971 849067 941630 4096 128 23691 38746 541596 90551 4096 256 27943 31427 1575440 668300 4096 512 32451 44654 604312 453392 8192 4 8185 7359 296488 430860 8192 8 9181 25837 247068 1116090 8192 16 19269 15258 632883 310465 8192 32 18431 23149 684377 333564 8192 64 22343 32045 790282 666884 8192 128 24154 58706 821417 1180754 8192 256 51643 68586 1577813 1125448 8192 512 55326 87526 711797 345335 16384 4 4913 5520 196696 180518 16384 8 6073 13220 386577 187215 16384 16 10932 18010 708895 756490 16384 32 31230 31027 958580 636917 16384 64 18863 19088 461521 993819 16384 128 31003 45890 383996 407246 16384 256 28649 54329 376512 340269 16384 512 43238 53980 1462340 968264 32768 4 6841 9947 178840 262313 32768 8 13207 17957 468569 384934 32768 16 17835 19914 711728 230729 32768 32