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: Sat May 16 06:20:49 2026 Auto Mode Machine = Linux oleg453-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-oleg453-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 2704 5624 115119 503814 64 8 3016 24445 752329 720041 64 16 1938 39114 763021 551422 64 32 3364 32272 1279447 321554 64 64 4386 32669 1210227 1879725 128 4 2047 3497 561107 456986 128 8 7308 14045 280086 187467 128 16 4422 22574 766076 702889 128 32 10709 46159 1332828 1040839 128 64 12517 40842 1346196 1281909 128 128 6091 40571 1142750 1802755 256 4 4186 6542 543720 115794 256 8 4437 9057 340027 359014 256 16 7718 12594 980760 844929 256 32 6646 19391 47565 268113 256 64 18663 52902 1128110 1208072 256 128 16912 50541 1422540 1398455 256 256 13193 37273 934659 539892 512 4 7025 6522 462042 195264 512 8 9101 9163 807687 766464 512 16 6923 13424 1108203 1003588 512 32 18956 28906 711133 661414 512 64 9390 40696 1401929 723105 512 128 9335 25882 344545 114083 512 256 16313 88062 1150968 1187895 512 512 25651 49103 1778004 892254 1024 4 6284 7222 302957 324766 1024 8 14327 17495 785213 558019 1024 16 21989 29935 815943 119948 1024 32 19851 35054 803728 560788 1024 64 19049 32921 1190795 273133 1024 128 28144 49742 107743 1232484 1024 256 29955 41086 1627617 1478064 1024 512 17503 78750 1614767 1673273 2048 4 4807 7220 173882 277508 2048 8 12236 15272 284051 222584 2048 16 17012 19310 1109408 995149 2048 32 31030 28845 506428 282286 2048 64 26062 59558 1372675 1211760 2048 128 27494 23682 1622638 1068957 2048 256 29669 60579 1645012 900997 2048 512 24282 57884 1647536 735892 4096 4 5759 5735 205725 197588 4096 8 9594 11569 323332 305355 4096 16 12290 18929 443674 494330 4096 32 11879 18765 645840 783474 4096 64 37165 36248 1446871 520999 4096 128 29932 38812 1599346 540794 4096 256 25697 54878 986736 1022440 4096 512 34522 38994 411456 696703 8192 4 4494 1875 205369 409948 8192 8 7639 11245 577069 516712 8192 16 14177 18378 489539 326697 8192 32 18054 30172 786177 735568 8192 64 23945 40877 925145 548949 8192 128 35682 45725 388171 555463 8192 256 37614 44559 508191 785189 8192 512 28569 51864 794191 829408 16384 4 5072 5472 182873 412903 16384 8 7190 8992 519237 374328 16384 16 14936 18566 391577 430174 16384 32 20396 28275 938485 896035 16384 64 32114 33044 765712 453609 16384 128 23320 37025 428843 453939 16384 256 36727 47834 520145 846061 16384 512 29253 35112 1133371 750968 32768 4 5138 7079 239262 227432 32768 8 10020 10984 373403 378352 32768 16 16041 17270 413392 315720 32768 32 19316 28354 732036 690652 32768 64