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 Jan 1 20:03:26 2026 Auto Mode Machine = Linux oleg417-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-oleg417-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 2021 4684 415017 98769 64 8 2769 7591 397208 394870 64 16 3327 18379 610350 520419 64 32 2743 44385 289635 74075 64 64 2436 55122 942521 1183548 128 4 2669 8931 115114 128137 128 8 4821 17007 305594 273522 128 16 4571 22775 249497 298459 128 32 4016 20990 197538 586868 128 64 3788 25651 969421 942199 128 128 5116 40920 1294270 1319723 256 4 4477 8643 104107 72073 256 8 5430 9327 209518 396828 256 16 5667 10759 682691 184023 256 32 9424 44138 947860 264481 256 64 5610 79851 229588 1036624 256 128 11595 36173 1201314 1152323 256 256 5269 51343 995306 1881098 512 4 5310 8900 136202 243125 512 8 8350 4821 95772 72757 512 16 8160 15913 406966 569502 512 32 3516 14086 850554 728255 512 64 14110 72634 1022219 491324 512 128 11670 18133 935801 692110 512 256 21574 74169 1355045 974885 512 512 21899 84613 1422357 1475116 1024 4 4369 4763 116115 142994 1024 8 5064 4035 196244 65147 1024 16 8942 9071 132606 128967 1024 32 9905 47982 746327 258393 1024 64 16070 24158 931702 353094 1024 128 18033 43882 378251 1042770 1024 256 15842 31417 1336827 197262 1024 512 11443 45946 946485 250496 2048 4 4173 2827 42518 31238 2048 8 6524 8099 91625 160767 2048 16 15504 9945 183448 230164 2048 32 12497 19705 158550 499275 2048 64 13863 17326 992275 265598 2048 128 12460 24290 1205468 325909 2048 256 17890 28277 270721 308803 2048 512 15878 39172 1528239 185592 4096 4 2831 3117 61506 62659 4096 8 5132 11243 264444 240063 4096 16 14731 9915 193125 150888 4096 32 15230 24244 319525 244199 4096 64 27251 19247 236393 369111 4096 128 14442 18573 225041 404300 4096 256 40086 45894 225204 465354 4096 512 24481 125525 603505 391994 8192 4 4686 6241 105395 105614 8192 8 6944 7515 97068 121188 8192 16 7907 11159 206984 170322 8192 32 14821 19291 447015 342532 8192 64 13131 22401 174423 430709 8192 128 18295 30819 604480 486338 8192 256 29959 33308 307401 171498 8192 512 18723 29644 669822 500857 16384 4 3589 4704 62026 149810 16384 8 8424 7999 156984 172584 16384 16 10423 14399 327633 160526 16384 32 13343 16158 211425 232264 16384 64 13343 26796 772104 373347 16384 128 20397 35100 453373 449479 16384 256 22276 37639 701908 525684 16384 512 30662 44535 684833 546482 32768 4