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 19:56:55 2026 Auto Mode Machine = Linux oleg336-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-oleg336-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 3895 13031 252810 256923 64 8 3524 14424 438043 400168 64 16 6600 47303 426219 587635 64 32 3732 72241 969761 76743 64 64 4363 61783 1279447 1363961 128 4 8186 11977 25427 239695 128 8 8530 21086 145304 118076 128 16 6807 54839 881842 209485 128 32 12640 21415 722760 280086 128 64 19167 78149 826202 853794 128 128 14497 84937 1377278 1421023 256 4 9681 10014 224735 249486 256 8 12287 9926 458118 370920 256 16 8126 62196 284751 215316 256 32 18867 82450 1254656 627256 256 64 19322 42787 894929 1032636 256 128 11289 86460 646518 1280084 256 256 23624 102526 1552085 1778290 512 4 8905 11558 260813 94938 512 8 6980 7846 100907 393542 512 16 5498 35818 729492 221371 512 32 21714 40891 1437592 823167 512 64 18690 21389 263113 685482 512 128 22677 77740 1296159 823167 512 256 30322 88640 1387437 975328 512 512 31094 75640 1506154 1193175 1024 4 11977 6401 231937 168861 1024 8 15065 25015 283799 236548 1024 16 17283 30393 676819 587160 1024 32 45929 51908 413064 793922 1024 64 24594 61760 1102459 167812 1024 128 14088 48822 1287921 893517 1024 256 29157 67635 1126458 1490373 1024 512 19770 104254 960454 1657133 2048 4 4335 9726 145535 118621 2048 8 15978 11223 159528 173160 2048 16 15709 18182 328728 424617 2048 32 12336 29543 927057 847400 2048 64 24858 31525 460541 293243 2048 128 28085 55340 1424106 1143524 2048 256 39811 54746 771310 965616 2048 512 58536 58291 1698352 1479797 4096 4 6398 10044 178048 153476 4096 8 11097 11909 95529 108062 4096 16 17885 17212 169480 279207 4096 32 28744 37282 554568 491178 4096 64 22988 73294 860292 639089 4096 128 39580 73712 1540960 1331586 4096 256 34754 58998 724192 529135 4096 512 27387 59457 619121 1473932 8192 4 2236 7375 104954 98312 8192 8 10527 14803 153768 122485 8192 16 18686 26906 374061 252770 8192 32 35861 52310 414823 462223 8192 64 28066 28660 668623 602624 8192 128 31291 45872 1085759 825720 8192 256 43779 45917 852370 519603 8192 512 33694 52421 809001 696827 16384 4 5539 6690 103691 116067 16384 8 9695 11137 168978 147195 16384 16 11464 18633 197876 215612 16384 32 21776 22613 1033098 469280 16384 64 27157 38690 284015 485396 16384 128 23314 29885 563122 403615 16384 256 27854 40588 951387 466170 16384 512 34355 46541 785241 480822 32768 4 5361 5875 91949 89955 32768 8 9713 11292 205247 175621 32768 16 12265 21665 262991 203562 32768 32