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 Aug 24 10:43:00 2026 Auto Mode Machine = Linux oleg449-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-oleg449-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 2274 9763 447537 239716 64 8 1561 25137 710511 621657 64 16 4069 8599 929467 639427 64 32 3415 15392 1304314 394870 64 64 2708 33388 1083249 1599680 128 4 2010 4770 492178 506097 128 8 3496 16456 870405 230633 128 16 8096 28757 969421 727658 128 32 2398 9745 1000121 486381 128 64 4577 24653 1217930 1022989 128 128 7984 55995 1266785 595328 256 4 5439 10604 353576 114951 256 8 3857 5988 859127 571198 256 16 8097 17044 129416 520272 256 32 6382 17737 1147398 800221 256 64 12288 56240 924200 1103757 256 128 6887 27312 1340826 668246 256 256 10952 30592 1619994 876662 512 4 7087 6127 233148 508905 512 8 3066 5871 504008 610982 512 16 16403 18454 614654 645703 512 32 18587 48152 762924 937845 512 64 13291 52404 1306409 1043072 512 128 16526 59053 790153 964378 512 256 11999 20372 470134 508905 512 512 12494 94462 1130370 1337324 1024 4 9436 5652 300645 512293 1024 8 10771 15182 778101 164313 1024 16 7184 11689 885048 517478 1024 32 12057 25909 1110440 706199 1024 64 13436 23504 580808 514317 1024 128 17285 46092 779938 1011817 1024 256 30941 45494 887242 211660 1024 512 15992 68733 519543 1582636 2048 4 5581 4498 136359 158835 2048 8 9629 9093 597984 482667 2048 16 15801 23115 561991 366108 2048 32 19934 19350 325083 225104 2048 64 34524 41544 425248 631714 2048 128 25491 52530 1070022 775698 2048 256 39166 67147 376325 1279062 2048 512 21731 49653 401796 1304310 4096 4 4318 6022 184163 100176 4096 8 9106 7438 262176 401410 4096 16 14283 12404 604142 524723 4096 32 14028 14027 260542 523253 4096 64 22513 39293 537327 496904 4096 128 16833 29332 587229 746373 4096 256 39409 31054 1658960 886025 4096 512 47418 72531 683237 691543 8192 4 1785 6434 432068 335640 8192 8 9022 14026 281861 285197 8192 16 11612 15472 233131 232422 8192 32 19567 23659 936543 434126 8192 64 19479 32228 716906 324703 8192 128 19418 42431 530367 401883 8192 256 30224 42441 840465 705845 8192 512 24397 44220 805832 417829 16384 4 5888 4720 393438 285913 16384 8 8106 9755 250420 207390 16384 16 13016 13874 579125 533524 16384 32 17961 29789 461338 458154 16384 64 28841 35198 405815 343896 16384 128 29929 43474 684124 633243 16384 256 31302 29102 436278 621216 16384 512 27747 43238 728795 740218 32768 4 5717 6640 268900 217783 32768 8 9300 9570 312934 400440 32768 16 14874 16540 745626 598216 32768 32