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: Mon May 4 12:04:25 2026 Auto Mode Machine = Linux oleg443-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-oleg443-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 2669 5903 582535 520419 64 8 4487 15976 866463 610350 64 16 4037 17353 1124074 1017549 64 32 3286 21269 1484662 1124074 64 64 3604 49346 789967 1828508 128 4 3879 11522 208833 157034 128 8 6929 6709 522346 753179 128 16 4100 28412 109035 90127 128 32 4306 30095 1521718 447464 128 64 8575 62377 1254941 1391557 128 128 9733 15146 1526043 2004703 256 4 4361 7867 606700 537999 256 8 8197 17583 833776 163261 256 16 8918 29107 697322 252716 256 32 6832 20695 847597 1552085 256 64 17065 95124 1375171 901693 256 128 19872 64906 73288 547044 256 256 16806 90650 1871263 1481420 512 4 5262 11242 635198 468391 512 8 10112 19499 697505 333573 512 16 16041 32572 1084694 820650 512 32 10514 28669 1176828 413231 512 64 20236 64089 1199171 1193838 512 128 15498 46255 827289 1354190 512 256 23755 66562 1454140 1527582 512 512 23359 104746 1616100 1528669 1024 4 7450 11355 365193 591609 1024 8 12466 20423 801777 348425 1024 16 16880 27580 621395 529471 1024 32 17766 44054 960669 854752 1024 64 23861 58799 368483 1192117 1024 128 28105 43265 1587315 523214 1024 256 19459 48265 1446211 835790 1024 512 24649 89768 1896395 937805 2048 4 8952 9481 261921 342873 2048 8 14371 14602 618211 477276 2048 16 17784 25255 306960 593809 2048 32 24590 39359 1181103 797816 2048 64 31792 40116 1423162 603615 2048 128 33123 76968 1387530 1055688 2048 256 30041 67537 1670606 1294677 2048 512 28983 71625 702089 734822 4096 4 7505 10134 312555 401766 4096 8 12321 11931 588174 362285 4096 16 23667 21210 1251829 626572 4096 32 27410 33055 825804 614295 4096 64 28881 58973 1526718 469937 4096 128 35801 35528 925200 1051283 4096 256 35402 58623 1842581 1098400 4096 512 50907 70811 556436 729977 8192 4 7040 8946 245460 246865 8192 8 12759 17012 260005 445485 8192 16 24131 36459 714208 553325 8192 32 27342 43655 469563 321543 8192 64 28082 35812 918591 776108 8192 128 28938 51418 1010616 1046506 8192 256 34132 71898 689265 1383086 8192 512 57456 66790 383090 751134 16384 4 3652 8403 572243 328631 16384 8 10389 13012 447990 427400 16384 16 19961 24946 705199 612283 16384 32 28855 36998 955275 526917 16384 64 29978 38611 1020806 622871 16384 128 42746 50735 1011863 1040041 16384 256 42415 53031 700141 711390 16384 512 34965 49144 639924 741088 32768 4 8049 8327 241999 322595 32768 8 10894 12135 610853 599772 32768 16 17164 23873 531757 651336 32768 32 26158 29252 778484 543136 32768 64 27810 39617 870286 868647 32768 128 38743 48024 1181124 698362 32768 256 42688 79902 1284622 826785 32768 512 46276 70766 1315673 903170 65536 4