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: Tue Sep 1 08:11:26 2026 Auto Mode Machine = Linux oleg236-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-oleg236-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 4 973 5207 695778 557144 64 8 5286 13660 889431 1105556 64 16 13231 57397 131405 852702 64 32 7948 56838 1255511 460591 64 64 9537 54374 491815 1599680 128 4 6217 10686 727658 531131 128 8 9884 20464 353715 774922 128 16 12977 52501 1007629 805138 128 32 8992 28674 1363288 1130717 128 64 13466 16264 636249 743788 128 128 7776 121332 1440082 1684006 256 4 6171 11688 576411 518263 256 8 4206 24103 947860 542347 256 16 13269 8084 931416 1019886 256 32 10553 21422 613985 733527 256 64 12058 40480 624702 1190657 256 128 17036 67067 1413179 1453348 256 256 15645 135014 1572543 2114473 512 4 7990 12128 629796 579179 512 8 16517 8583 873740 712076 512 16 18405 8520 158266 984268 512 32 7785 46101 786391 732478 512 64 34598 44896 1225169 1145443 512 128 13905 27438 1689859 986529 512 256 7453 46723 451075 1589779 512 512 5959 85191 1279935 2225819 1024 4 10676 4288 612097 149225 1024 8 9219 9467 248008 468432 1024 16 28875 21503 795687 521119 1024 32 13934 41099 856799 417806 1024 64 25941 45659 1490373 736094 1024 128 31300 78921 1446698 630888 1024 256 37712 64188 517166 297501 1024 512 37993 58594 976172 681653 2048 4 4645 4901 200470 145061 2048 8 10679 15207 328100 807567 2048 16 10901 19974 193241 577094 2048 32 30425 26115 906129 1105837 2048 64 34754 33978 1562429 1208181 2048 128 49522 56109 1553950 1400881 2048 256 23564 44497 512256 385825 2048 512 34704 62951 1479797 1048600 4096 4 9174 5812 187220 149456 4096 8 14743 15360 323362 322391 4096 16 14478 21130 720486 183742 4096 32 49792 68481 991576 660109 4096 64 68266 88464 1340731 995887 4096 128 45773 2211 672459 843813 4096 256 52103 105325 1625987 623728 4096 512 53451 125102 959940 563647 8192 4 7175 10378 684500 460846 8192 8 12714 10007 298334 276457 8192 16 15068 18322 382247 296166 8192 32 32631 38924 871106 763824 8192 64 30423 36536 675790 670541 8192 128 33904 23651 486173 483219 8192 256 32865 47512 481851 684432 8192 512 36546 56258 1231496 799923 16384 4 8356 7412 278877 128524 16384 8 10940 11943 1012534 428599 16384 16 18612 22090 881710 510501 16384 32 25222 27497 816089 709510 16384 64 28301 28988 878498 788494 16384 128 34282 48691 925853 518235 16384 256 32148 53001 421822 538027 16384 512 32738 63178 575324 277647 32768 4 6440 6891 255160 331939 32768 8 12032 17473 548766 449768 32768 16 20248 17266 737868 385746 32768 32 20595 25593 590551 436016 32768 64 33798 39428 558600 524674 32768 128