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: Wed Aug 26 20:57:21 2026 Auto Mode Machine = Linux oleg309-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-oleg309-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 3000 8490 481234 429630 64 8 2128 5803 294723 256923 64 16 3575 20914 727850 647135 64 32 3353 6664 1101022 929467 64 64 2910 35773 1183548 1734015 128 4 3110 7407 595328 533241 128 8 7085 13011 410199 621518 128 16 8129 10682 1059322 859260 128 32 2965 25102 1243315 985435 128 64 5248 16623 1142750 1162547 128 128 12029 58875 1231904 1710838 256 4 3651 4385 226968 444281 256 8 5111 14570 604991 239044 256 16 10675 12669 375985 941213 256 32 5926 40056 1066483 853662 256 64 10207 32241 335984 1158540 256 128 17162 62438 653204 882426 256 256 10864 85585 1610276 2045979 512 4 5388 6855 351654 551796 512 8 9689 8634 755409 268207 512 16 10104 24423 274095 680918 512 32 31988 73830 1227971 760762 512 64 30231 88813 1248678 1117430 512 128 42101 106602 1326585 1071167 512 256 22286 112012 1190529 1034530 512 512 33424 103809 1684557 651383 1024 4 14738 18451 660276 690086 1024 8 26173 34502 975285 753396 1024 16 32088 51571 1182598 926676 1024 32 36038 75144 1462960 1179674 1024 64 56195 94083 1692394 935966 1024 128 70451 135058 1790460 1519371 1024 256 71568 120723 1841116 1841906 1024 512 64075 142241 1777861 2044438 2048 4 18517 20135 749636 621162 2048 8 25210 22746 605743 517690 2048 16 15717 26887 571108 1015862 2048 32 35740 67492 1302925 605914 2048 64 52526 69104 1013824 743923 2048 128 19871 45244 1050139 746898 2048 256 34417 72755 785271 1468162 2048 512 26741 45580 416344 520702 4096 4 9978 8152 341644 313433 4096 8 10576 21433 775166 492431 4096 16 38551 50811 1218360 1076783 4096 32 62466 80197 1380928 820989 4096 64 69965 98592 1542759 1549857 4096 128 95285 139060 1691796 1532985 4096 256 83412 117559 1750403 1405213 4096 512 77294 132141 1960768 1413887 8192 4 16733 15585 614743 647432 8192 8 31003 23762 192141 295060 8192 16 25515 19984 487152 471722 8192 32 18626 30494 243475 355846 8192 64 23602 28995 923976 302959 8192 128 31039 46600 885815 543530 8192 256 45444 48480 1120969 878612 8192 512 35711 59515 1055799 702325 16384 4 8701 9368 389613 417938 16384 8 23175 5229 539370 292269 16384 16 20107 31300 1085104 940527 16384 32 57422 75979 1625888 1342392 16384 64 74717 79497 1415967 924185 16384 128 28949 58478 707428 631950 16384 256 50375 76159 1461562 962298 16384 512 58922 60186 1801589 1408884 32768 4 8757 8590 468127 418856 32768 8 14397 11833 377454 308172 32768 16 14060 18133 552803 714726 32768 32 28614 31509 1336866 1243613 32768 64 63147 63549 517548 349693 32768 128 39479 43610 976137 644884 32768 256 36312 81936 1787200 1275466 32768 512 52576 79074 1015622 647833 65536 4 7968 8629 317121 329970 65536 8 14071 18368 399366 452646