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 Jun 1 10:35:05 2026 Auto Mode Machine = Linux oleg234-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-oleg234-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 2268 6106 586352 651849 64 8 2138 20571 404998 780776 64 16 5265 8262 232652 780776 64 32 3616 50678 1138375 852702 64 64 5871 36929 454354 328238 128 4 3612 11674 1076312 401307 128 8 4005 14863 992724 691126 128 16 8473 42190 522346 586868 128 32 9417 75735 589446 942199 128 64 7882 76741 908709 1802755 128 128 6274 50692 1684006 2985839 256 4 6251 10303 378770 682691 256 8 6306 15875 825443 759469 256 16 13896 15541 859127 1062263 256 32 12081 23770 620012 901693 256 64 10618 24873 1231629 910872 256 128 11720 66804 889002 2152625 256 256 15581 111455 1868008 2699161 512 4 10349 14858 526756 456735 512 8 9244 26816 959209 242549 512 16 20437 39026 829847 1347393 512 32 15364 38840 1190529 875164 512 64 28237 27258 1510391 932550 512 128 17214 77482 1379416 709957 512 256 25486 76866 1625889 2246778 512 512 15585 118659 355555 2178404 1024 4 7473 8842 660174 306503 1024 8 14964 19852 304137 842017 1024 16 14101 29203 825192 578851 1024 32 28475 29380 1659694 931702 1024 64 26387 41563 405537 991266 1024 128 34382 58016 1115342 1784509 1024 256 41512 104554 1537868 1416636 1024 512 38797 122093 1172909 1216082 2048 4 6856 9785 347477 309504 2048 8 10730 25693 952130 642007 2048 16 22664 28457 1459928 867424 2048 32 46886 36238 1287304 1166349 2048 64 44978 65935 1074573 1194904 2048 128 34444 61344 906225 1010365 2048 256 64591 89745 1640927 1414491 2048 512 41869 87420 625368 1670606 4096 4 10588 9344 577051 384855 4096 8 13803 18038 620126 625523 4096 16 21613 26651 653480 661710 4096 32 26414 42244 966474 522839 4096 64 37317 67627 1232255 838827 4096 128 67398 58884 2021682 906359 4096 256 48424 124873 1768603 1065563 4096 512 46920 67061 1074762 1004153 8192 4 11191 12131 560144 489861 8192 8 13419 13733 455091 431044 8192 16 20583 21784 745204 617572 8192 32 27217 30425 444827 462254 8192 64 41469 57686 812290 694644 8192 128 39655 60286 1699563 1047303 8192 256 50086 52321 444396 847409 8192 512 47074 73180 1045550 1233529 16384 4 8626 10811 359180 345499 16384 8 6031 22771 564093 393713 16384 16 24932 30884 688752 380793 16384 32 29230 50820 708070 1086906 16384 64 50115 46339 1078886 1015481 16384 128 42872 59395 1673398 969699 16384 256 44390 57112 1173392 588317 16384 512 42654 83830 707858 725533 32768 4 10008 10966 391464 664663 32768 8 17146 18300 994624 716100 32768 16 27166 37618 1258750 889055 32768 32 40378 40317 842084 797002 32768 64 52224 67020 884137 687797 32768 128 47749 60929 759432 816563 32768 256 54801 75730 1337256 1152181 32768 512 60572 93788 1069307 1139439 65536 4 9955 10050 642364 501999 65536 8 19646 21111 743383 685185 65536 16 28534 32440 1135179 1030181 65536 32 42337 45413 1050303 1052721 65536 64