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: Thu Mar 26 08:47:31 2026 Auto Mode Machine = Linux oleg460-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-oleg460-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 7935 5097 1087638 380864 64 8 3994 25446 1255511 695778 64 16 18302 68534 1690338 645579 64 32 9913 102074 1722886 415017 64 64 13141 87672 2467108 1279447 128 4 4210 19182 576780 537512 128 8 11977 49614 538051 711270 128 16 20664 43627 859260 735635 128 32 31762 85847 2248149 978253 128 64 14680 83225 1967960 1504659 128 128 24431 179267 1967960 703810 256 4 12669 11133 661250 471600 256 8 9727 14696 1600674 399337 256 16 19725 62257 2097948 828628 256 32 22268 85818 2285501 864661 256 64 37047 54641 1570244 571198 256 128 27253 115932 2170027 1543163 256 256 43119 135525 725106 2170027 512 4 10333 9389 532767 458785 512 8 19989 36219 816594 788992 512 16 26958 51780 1260404 1195832 512 32 43738 64412 663252 1410215 512 64 36813 92684 1496706 608213 512 128 24824 165155 1679288 1350783 512 256 40774 95465 1614885 1672748 512 512 50884 102193 1537424 1823291 1024 4 10992 18090 215126 574361 1024 8 28638 46768 585160 1092921 1024 16 43585 48833 1001903 845664 1024 32 45653 71076 1149061 1114185 1024 64 31664 88214 1238168 1214706 1024 128 30330 28843 633307 1307923 1024 256 25653 49729 1086012 196964 1024 512 46503 74695 1314729 1107005 2048 4 12983 12377 207748 302741 2048 8 18271 24321 931783 329156 2048 16 16491 36348 1003988 870412 2048 32 32185 25148 653684 339190 2048 64 45988 48934 652641 551138 2048 128 42648 45978 1122749 1010841 2048 256 27041 89353 1054004 705492 2048 512 58832 69200 978039 1106407 4096 4 10443 10386 245753 293513 4096 8 17455 20482 408618 483588 4096 16 21450 30310 662042 541016 4096 32 32393 39972 443765 323253 4096 64 35582 84330 1773166 1522119 4096 128 46740 65438 807749 243534 4096 256 45746 99407 1631856 1106393 4096 512 66315 93796 1836082 2013862 8192 4 14139 10550 284701 385632 8192 8 22059 25038 823405 498720 8192 16 28097 31896 1289644 1139520 8192 32 35164 49503 934506 774150 8192 64 36152 58363 1207901 1095941 8192 128 48084 67852 727978 499394 8192 256 46865 61550 1569381 1470199 8192 512 75895 88523 1046793 1342921 16384 4 4342 12830 445967 516063 16384 8 14559 17194 568790 575907 16384 16 23787 25457 637532 750591 16384 32 24459 38290 974318 644528 16384 64 33179 50491 1456081 1234478 16384 128 56873 79132 883331 630374 16384 256 53449 76738 1698378 1370912 16384 512 63829 69410 1292525 756307 32768 4 8389 11212 298205 232154 32768 8 15885 24412 557704 422638 32768 16 29837 35308 1256449 1253366 32768 32 47449 56725 534996 625835 32768 64 43775 81390 878008 652319 32768 128 50563 56212 719117 580654 32768 256 43422 54706 646312 1079418 32768 512 55240 80647 526681 1110099 65536 4 11182 11276 336869 369071 65536 8 17408 18193 369481 543240 65536 16