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: Fri Apr 3 08:05:54 2026 Auto Mode Machine = Linux oleg649-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-oleg649-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 2444 3246 338589 102895 64 8 1634 10573 720041 557144 64 16 1476 15318 926260 369844 64 32 2071 20285 1124074 1083249 64 64 1922 49610 488236 926260 128 4 2228 4199 470606 465304 128 8 6073 6470 739689 310724 128 16 3726 13171 983630 421139 128 32 4185 47532 1121270 590094 128 64 2348 67329 1291158 335794 128 128 4912 45294 877518 1561553 256 4 4588 10088 713541 66219 256 8 3696 4996 812329 508929 256 16 4670 39360 1190657 873809 256 32 6499 6742 177425 1274008 256 64 13802 83907 1184092 323630 256 128 9165 11818 1422540 1581810 256 256 5769 47967 330401 1924938 512 4 4010 6004 570107 178766 512 8 4456 6424 68761 588544 512 16 5203 13064 88750 572081 512 32 16189 43997 1442420 1224470 512 64 10433 50637 1213400 146708 512 128 15795 52416 1040545 1043072 512 256 19779 32124 1575781 1575781 512 512 19358 58837 1344020 2039772 1024 4 5828 8912 614637 305674 1024 8 10324 5482 320500 360321 1024 16 21308 12601 798053 202613 1024 32 14652 22401 141571 810706 1024 64 20827 27345 1466957 255808 1024 128 17388 22293 520614 1137798 1024 256 16395 50226 1370965 1003777 1024 512 19704 52520 966941 1061322 2048 4 3873 3296 156791 132874 2048 8 7846 9973 616880 143228 2048 16 9879 13152 475849 93906 2048 32 19689 17225 731443 953398 2048 64 20806 20521 388091 383876 2048 128 16354 24692 444066 236684 2048 256 25008 31238 626691 378281 2048 512 21402 34964 1216221 862979 4096 4 4512 5151 226624 167075 4096 8 7918 7860 327099 421232 4096 16 16057 22983 206367 430931 4096 32 12271 16214 452342 297220 4096 64 16633 1295 434770 405302 4096 128 19164 24709 1329011 451901 4096 256 24491 29602 294590 286891 4096 512 17295 41164 672696 437237 8192 4 4137 4580 388945 341389 8192 8 9142 8341 405645 380595 8192 16 12274 10549 308899 302199 8192 32 10314 16653 411179 317690 8192 64 16102 21995 623670 337343 8192 128 18061 29168 590720 556551 8192 256 20003 28734 918591 394622 8192 512 32853 38609 735301 523116 16384 4 4482 5564 291878 207534 16384 8 9344 10869 384845 362758 16384 16 10212 15106 623912 560902 16384 32 17602 27189 676940 471644 16384 64 25650 30854 374250 352661 16384 128 32394 33582 290661 462994 16384 256 38184 28601 1390834 439060 16384 512 32764 52297 578287 387923 32768 4 4835 5167 190787 206869 32768 8