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 Sep 18 21:40:51 2026 Auto Mode Machine = Linux oleg649-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-oleg649-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 3827 10949 254971 516414 64 8 5153 22407 232854 428943 64 16 7229 13045 302018 939223 64 32 4093 28442 1232453 614542 64 64 8758 54840 1304314 1879725 128 4 3545 15759 677178 597981 128 8 3951 8298 819893 617941 128 16 6653 16006 1093856 870405 128 32 3132 39642 1183041 1165070 128 64 5535 58318 864797 1000121 128 128 6874 28901 1406136 1642783 256 4 4311 6248 152027 324412 256 8 5054 14318 1023775 770920 256 16 9118 8068 1089202 805021 256 32 15086 65072 1248819 568777 256 64 24990 112530 84097 1230218 256 128 23232 56990 1639786 501091 256 256 13910 93087 1729594 717355 512 4 6106 8556 486207 497125 512 8 13035 7371 867738 163011 512 16 21498 45778 1036527 722133 512 32 25552 18311 882718 927315 512 64 34994 24724 1383861 1245780 512 128 20840 103141 878027 173158 512 256 19964 58333 1437592 1129775 512 512 37655 124572 1064266 2105777 1024 4 5597 10827 159079 383212 1024 8 13460 9419 152337 514625 1024 16 23260 44616 1068983 142378 1024 32 23988 38745 540941 661496 1024 64 35379 70820 1077836 952573 1024 128 32895 35485 346289 1391395 1024 256 25555 51151 1630707 1434138 1024 512 47598 107982 1028043 186245 2048 4 4007 6945 127441 329472 2048 8 7404 11259 659607 477382 2048 16 19411 31096 1148723 538526 2048 32 20841 32237 674789 345132 2048 64 20281 30225 796263 203034 2048 128 26659 52742 1015382 1248935 2048 256 19615 61264 370211 678145 2048 512 26759 44893 644657 696398 4096 4 6458 5423 207434 210385 4096 8 16488 10222 450858 454508 4096 16 13688 21526 452246 426005 4096 32 24852 29613 357662 278944 4096 64 22521 23529 1211060 972217 4096 128 38742 46434 383053 1107392 4096 256 66772 39696 1024758 563721 4096 512 23529 45695 1316585 845932 8192 4 5520 7730 148204 195559 8192 8 12832 12791 452692 442952 8192 16 14486 13037 539197 525090 8192 32 23845 28478 655459 466940 8192 64 24127 38476 615106 510122 8192 128 32239 49432 1089097 622540 8192 256 40870 55296 361199 772392 8192 512 42888 58658 1121591 729338 16384 4 6307 6914 322043 275763 16384 8 12188 15792 294390 312803 16384 16 20649 19097 503547 421204 16384 32 25877 27332 791081 613841 16384 64 28974 33402 568908 475614 16384 128 25489 51580 743171 516288 16384 256 30478 57890 547701 328546 16384 512 41963 47792 1204256 736126 32768 4 6777 6855 380320 370338 32768 8 11761 13580 339814 330126 32768 16 17104 19889 448846 479028 32768 32 23025 28125 569372 374017 32768 64 31475 48326 483654 460036 32768 128