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 08:05:21 2026 Auto Mode Machine = Linux oleg320-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-oleg320-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 1870 4700 640954 571375 64 8 3038 5562 877797 720041 64 16 3590 34575 983980 208444 64 32 7238 38837 1279447 1083249 64 64 3725 13519 1279447 1828508 128 4 3766 10840 597981 472262 128 8 5792 13775 586868 776042 128 16 11998 53693 1196221 895074 128 32 5537 53357 1421023 1114289 128 64 13190 84535 1391557 978253 128 128 7933 87313 1642783 3124872 256 4 3887 8375 494400 600928 256 8 5309 27402 802014 750970 256 16 17221 52826 672010 709299 256 32 15714 50593 1319408 1201314 256 64 17729 111792 725106 1430119 256 128 23907 76163 1561112 1489641 256 256 20101 63460 1778290 2135500 512 4 4751 6828 489979 296294 512 8 6604 16117 895230 796011 512 16 16952 34398 844865 440617 512 32 14146 39885 927716 687237 512 64 20507 20575 1286838 1270846 512 128 22498 106443 982467 1320061 512 256 20465 114131 703445 1547395 512 512 40134 171993 1772135 2073249 1024 4 11724 5987 84155 215580 1024 8 18902 17654 503938 780363 1024 16 24508 20371 1109579 859026 1024 32 17401 31919 782781 404125 1024 64 34312 56072 1039740 463128 1024 128 52167 33466 1268896 571078 1024 256 45946 72955 1350701 1282920 1024 512 57556 131465 478291 352746 2048 4 5055 7259 199553 265524 2048 8 10484 16180 547904 391433 2048 16 26302 30746 406916 412327 2048 32 17050 41633 940352 450116 2048 64 35826 55373 683378 904984 2048 128 30952 28195 336902 237811 2048 256 18323 35842 553803 375716 2048 512 45438 43337 201713 486328 4096 4 8174 9103 207276 321962 4096 8 16899 25536 806157 536203 4096 16 22137 37468 472756 419023 4096 32 28047 73136 340594 368541 4096 64 32031 34903 631524 597440 4096 128 40306 60699 1320430 911214 4096 256 44363 142123 997564 1458664 4096 512 50383 84293 1124719 545032 8192 4 2488 6849 137468 263196 8192 8 14027 17213 647749 441308 8192 16 18011 19005 414803 621447 8192 32 20889 73430 492007 487705 8192 64 35320 52723 775898 519533 8192 128 37761 49778 678257 781688 8192 256 34442 60224 629243 719217 8192 512 51407 62913 656725 1558844 16384 4 7378 7542 277812 285157 16384 8 10517 13184 303243 263586 16384 16 15325 15820 655859 692884 16384 32 20348 28002 474212 528242 16384 64 28159 37882 264894 360403 16384 128 36842 60298 667070 578842 16384 256 38796 46429 515804 447515 16384 512 37748 48613 1019095 982256 32768 4 8404 10451 489797 246845 32768 8 14628 9705 406470 603729 32768 16 17053 16504 411322 378728 32768 32 19872 36736 1186385 681346 32768 64 23296 31901 588316 921303 32768 128 23364 29724 479379 226915 32768 256