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 Sep 7 13:45:37 2026 Auto Mode Machine = Linux oleg455-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-oleg455-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 2653 11105 610350 512471 64 8 2395 28144 408077 695778 64 16 3557 10854 760859 581273 64 32 2461 56043 1013707 283217 64 64 2600 72652 1553394 1562436 128 4 2563 6258 427851 589446 128 8 7006 16404 413039 770474 128 16 5099 19242 934004 853794 128 32 6049 65298 584313 643108 128 64 8737 61867 1521718 1306873 128 128 8665 73940 1521718 1663139 256 4 5260 10279 537729 330809 256 8 9655 10659 453858 703260 256 16 10954 21691 163909 600928 256 32 13717 37818 1334162 500857 256 64 7208 31246 490560 668246 256 128 5628 48632 1675612 1662639 256 256 6906 38004 1766587 1938842 512 4 7590 4345 329681 547017 512 8 15916 10349 339318 500484 512 16 6433 9887 846530 455090 512 32 18276 46613 1289930 846197 512 64 14508 22744 1383861 1326585 512 128 21812 49684 982917 1418599 512 256 25908 66719 1662389 1565443 512 512 16146 37190 1182010 1999881 1024 4 5515 5966 432054 226997 1024 8 5327 19805 873705 227309 1024 16 23092 31830 1085737 284759 1024 32 27826 47847 1267398 1096548 1024 64 15405 35746 728849 215493 1024 128 28879 69541 340200 1329791 1024 256 34408 83462 997946 1486247 1024 512 39422 92343 1149368 953418 2048 4 6133 6638 200644 148792 2048 8 9023 18079 886949 334098 2048 16 13160 23547 923767 879683 2048 32 21393 18852 1315294 207768 2048 64 16518 31064 807870 1160989 2048 128 13469 21142 592213 685888 2048 256 19125 74673 942415 553517 2048 512 53326 90612 1750616 1032840 4096 4 5603 4645 191814 145197 4096 8 6399 8522 264652 262649 4096 16 10508 12272 474126 332686 4096 32 20358 23398 455062 481541 4096 64 13397 20047 335133 642002 4096 128 26419 33410 1624143 507997 4096 256 22101 50592 740007 1000469 4096 512 25802 105263 752255 1098400 8192 4 5646 1718 162481 289767 8192 8 8750 9821 454934 403981 8192 16 20653 20129 773035 571350 8192 32 27511 18385 337161 271033 8192 64 17963 26511 509578 413236 8192 128 24589 41204 886959 239210 8192 256 30125 46471 530809 559524 8192 512 30437 53366 1200474 1001718 16384 4 6677 6433 217643 237921 16384 8 11757 18913 395510 443183 16384 16 24532 27378 534433 428306 16384 32 24452 28674 377939 378899 16384 64 21576 27826 694797 703654 16384 128 32367 34543 1509893 1188531 16384 256 29750 56109 1023421 820435 16384 512 37413 55356 545151 477779 32768 4 4218 5669 309964 131269 32768 8 11261 9402 369746 297739 32768 16 14918 24469 868120 244109 32768 32 27981 27341 426150 515252 32768 64 38018 50651 280807 879509 32768 128