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 Oct 2 01:43:18 2026 Auto Mode Machine = Linux oleg155-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-oleg155-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 3644 18615 136413 496362 64 8 7289 20388 852702 681644 64 16 2781 37798 551422 874936 64 32 2830 24445 1279447 1249666 64 64 4112 23205 1363961 1734015 128 4 2058 3031 270626 189051 128 8 8405 19476 747933 571257 128 16 2790 45486 992724 1007629 128 32 3237 37779 1114289 864797 128 64 3998 84776 761728 1085013 128 128 13810 124743 1642783 1642783 256 4 3730 3696 133403 584570 256 8 10535 6470 691930 152113 256 16 7930 8670 882426 47762 256 32 20790 20462 1260547 1004618 256 64 14257 24660 1619994 1274008 256 128 13491 64339 1195962 713067 256 256 20192 122088 1579483 1552085 512 4 6517 4793 663252 165155 512 8 4615 15001 164686 927716 512 16 12849 24206 936209 575146 512 32 20209 54157 1158418 1110496 512 64 9359 94778 1344020 405736 512 128 15057 41626 816594 1276132 512 256 28541 28027 1580419 1684557 512 512 17006 90730 636705 2105777 1024 4 4521 4482 331944 120696 1024 8 9095 15573 307314 500240 1024 16 15356 16085 500940 807050 1024 32 22382 40456 547003 935966 1024 64 38284 36366 1153381 299931 1024 128 35400 48365 1512415 1381993 1024 256 32593 74897 1424624 1012771 1024 512 34620 96583 1052480 385378 2048 4 6973 6820 106822 114062 2048 8 11106 13594 431897 715541 2048 16 17463 27259 731194 899770 2048 32 18764 27566 701631 631714 2048 64 26217 44575 423842 1020933 2048 128 39089 29789 308937 622648 2048 256 47573 50888 1638423 388178 2048 512 41465 62209 1807720 835937 4096 4 6869 1282 305719 298433 4096 8 11629 14661 375608 402954 4096 16 18555 20788 285499 426269 4096 32 18291 27528 417201 506425 4096 64 22964 28322 482800 1232963 4096 128 37503 60531 616410 592494 4096 256 29246 41654 823626 573028 4096 512 39497 46075 937519 598730 8192 4 7018 9984 159780 312683 8192 8 11337 8634 427829 481688 8192 16 19329 21979 213672 310807 8192 32 12350 21437 466782 441955 8192 64 24976 32499 713097 608343 8192 128 26669 44279 885907 822656 8192 256 33527 33385 372702 505462 8192 512 30756 44948 809401 726040 16384 4 4353 5919 277042 274255 16384 8 9062 9761 479048 356919 16384 16 17866 26179 397475 585475 16384 32 27187 31653 860016 640849 16384 64 30065 32047 969015 361598 16384 128 33954 40910 658151 729740 16384 256 37909 46231 967800 600260 16384 512 36629 40810 1611173 752143 32768 4 6133 5016 258514 214575 32768 8