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 Jun 12 00:19:00 2026 Auto Mode Machine = Linux oleg137-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-oleg137-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 1383 6297 727850 470274 64 8 3097 5757 889431 727850 64 16 2564 37623 969761 688639 64 32 4715 51446 253048 763021 64 64 4702 30563 1232453 167165 128 4 3078 8805 667081 921183 128 8 5468 9632 814915 895074 128 16 8075 15680 1175271 934004 128 32 6347 25361 1319723 1105114 128 64 6686 63021 1377278 1231904 128 128 10905 47127 1471662 1778862 256 4 3261 7391 625794 59111 256 8 3345 10896 904732 778183 256 16 10466 28539 1142514 991629 256 32 14977 31573 635047 844929 256 64 3944 9895 47362 152027 256 128 11302 77690 1398455 1058076 256 256 14152 78767 1740810 1766587 512 4 6950 8286 595232 322599 512 8 12216 19107 876951 506863 512 16 19323 35597 1239310 555794 512 32 13381 48887 912733 851903 512 64 14309 59066 1417662 1089647 512 128 12128 57297 1599251 1264113 512 256 17062 56946 1650887 1635797 512 512 17229 55931 857345 831453 1024 4 5363 6219 127474 100254 1024 8 6988 10731 451493 243288 1024 16 8094 16023 1097388 891107 1024 32 24844 46553 349360 1015885 1024 64 31203 59524 1031005 772225 1024 128 33310 42786 1189476 1081363 1024 256 37631 78305 1625769 1326096 1024 512 34819 87438 1709912 619156 2048 4 4373 5836 270440 266769 2048 8 12882 10375 808174 768481 2048 16 15025 16198 355679 918433 2048 32 21674 42579 920895 273828 2048 64 34078 51050 1021418 693530 2048 128 20289 41836 1009772 537246 2048 256 63568 76295 808783 1425288 2048 512 56406 39129 1035330 886491 4096 4 4778 5008 295868 811565 4096 8 6662 7848 427872 448785 4096 16 15101 16351 458989 680962 4096 32 16946 19328 788436 599002 4096 64 31615 41387 943336 813332 4096 128 43100 70337 1596819 1384267 4096 256 54010 138308 1054056 794268 4096 512 53492 143931 1452007 2047951 8192 4 6543 6753 311117 427472 8192 8 9814 9443 378053 268431 8192 16 12018 2563 908415 525500 8192 32 26159 16113 644130 429374 8192 64 22474 25073 634355 397168 8192 128 25361 35584 512259 753208 8192 256 40755 50662 602392 731170 8192 512 36119 51949 1250909 1035530 16384 4 4586 4637 219480 197955 16384 8 8131 9338 356903 557187 16384 16 17479 15804 287534 340101 16384 32 22899 23558 622798 327254 16384 64 22773 29351 880863 540456 16384 128 24917 30593 785879 654971 16384 256 28300 42795 1009737 945627 16384 512 27612 37834 537005 457143 32768 4 5228 5098 183468 157143 32768 8 7053 7024 306943 218437 32768 16 10042 15747 738201 381884 32768 32