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 Sep 7 10:46:11 2026 Auto Mode Machine = Linux oleg159-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-oleg159-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 3463 3569 592827 952555 64 8 3452 30175 831569 1336792 64 16 11287 50073 1017549 673098 64 32 5074 76459 2133730 1363961 64 64 5643 64842 668072 1638743 128 4 4657 5664 535368 397739 128 8 6710 11951 780556 776042 128 16 7174 21996 1040839 208105 128 32 5570 36517 1048974 819893 128 64 5923 26812 1175271 1254941 128 128 5490 25044 1440082 1111981 256 4 10700 9627 561637 348300 256 8 6447 13456 450809 612235 256 16 6482 25855 862577 533190 256 32 16796 85050 1280084 865358 256 64 17280 61536 1422540 1123389 256 128 25945 72624 1570244 1224606 256 256 8499 143898 672010 1715775 512 4 5071 2636 181623 487642 512 8 4042 12981 404742 324255 512 16 4976 5348 894857 506983 512 32 14763 49641 932956 546321 512 64 25485 27631 1221684 478089 512 128 18152 28204 1117430 770037 512 256 13728 49506 682649 250733 512 512 12126 37391 1446306 1834193 1024 4 7798 6502 81385 524556 1024 8 5797 7431 825034 256510 1024 16 5904 10568 315277 505420 1024 32 21828 16429 1056883 267502 1024 64 19241 35469 1422266 523023 1024 128 15014 76053 1241389 1357961 1024 256 27872 70079 1537868 296720 1024 512 18624 27456 1410125 1132697 2048 4 3961 13493 271474 99936 2048 8 9002 6131 493028 112664 2048 16 14657 11343 561697 459728 2048 32 21287 15490 613181 302071 2048 64 14140 20296 415096 817247 2048 128 15401 29112 1336787 870765 2048 256 21858 51286 1000015 722401 2048 512 28387 111565 1022513 1285570 4096 4 893 2759 343598 459295 4096 8 3688 8328 1186880 878235 4096 16 8765 30127 231816 517235 4096 32 13844 23706 192961 263051 4096 64 27494 27883 325722 734690 4096 128 26925 44868 701367 670151 4096 256 29102 42300 820166 659070 4096 512 35313 46465 295147 671697 8192 4 5472 7540 158446 121993 8192 8 5713 7800 174097 129337 8192 16 7577 19870 512038 242539 8192 32 16072 30008 685798 720121 8192 64 17487 23503 782792 328654 8192 128 18661 35883 495641 443581 8192 256 31521 24808 934633 566340 8192 512 51719 44169 1192102 524089 16384 4 5298 5824 191207 181040 16384 8 17893 11988 994236 899189 16384 16 25791 23122 963877 703388 16384 32 19539 15213 737786 582438 16384 64 43644 36568 957458 315483 16384 128 48417 73601 813712 1038736 16384 256 28679 25573 682948 496726 16384 512 24633 40150 411721 590328 32768 4 4665 6795 187390 188598 32768 8