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: Tue Dec 2 22:53:07 2025 Auto Mode Machine = Linux oleg126-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-oleg126-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 3488 12366 150907 187742 64 8 3920 28245 438043 278227 64 16 2197 39188 639427 647135 64 32 3546 56995 913649 608965 64 64 3848 75919 1066042 1279447 128 4 3524 10379 249962 230633 128 8 8246 22691 389091 264493 128 16 7887 39085 397444 432679 128 32 7520 65875 913347 841746 128 64 7066 84776 1076312 152919 128 128 10325 60603 105708 1618028 256 4 7038 9524 257813 254996 256 8 12939 24059 451568 123905 256 16 12126 20573 675391 764334 256 32 12345 69792 917880 723153 256 64 12076 86342 1224606 1058076 256 128 13396 99110 1084800 1463250 256 256 11480 75229 476835 1254656 512 4 12908 10337 288144 174438 512 8 12577 16340 489420 498625 512 16 20481 40956 458002 641651 512 32 19452 60584 237138 664073 512 64 14678 84670 114643 851903 512 128 25163 101888 1326585 1075459 512 256 34300 120241 1463057 1261144 512 512 25137 127675 685263 2124526 1024 4 11288 14362 252648 229544 1024 8 17377 22947 153942 262035 1024 16 21331 35190 725280 606650 1024 32 28435 66840 870694 990352 1024 64 28428 38454 1226500 1098511 1024 128 33419 117135 1845071 831905 1024 256 42514 107133 1099636 986712 1024 512 28748 65201 1793451 1653942 2048 4 11075 12531 144197 104249 2048 8 20549 23928 415920 411320 2048 16 17583 36394 758506 627057 2048 32 34040 64408 893964 826129 2048 64 37666 91493 1241175 586671 2048 128 38741 54362 1313484 1241175 2048 256 43369 96987 1018995 1285570 2048 512 59914 92577 1662201 1439379 4096 4 10874 12218 272541 218662 4096 8 21829 21558 420448 368573 4096 16 29079 25403 457705 534585 4096 32 42694 46539 942457 759237 4096 64 43321 62922 645961 1005623 4096 128 37222 80806 1262222 375649 4096 256 50684 75463 766178 495228 4096 512 32051 91653 1431201 1473932 8192 4 10484 12893 270309 132855 8192 8 21599 21371 360180 191805 8192 16 27998 42092 721119 527120 8192 32 37335 50240 445340 753704 8192 64 46379 58434 750953 415264 8192 128 53615 50495 1396748 629094 8192 256 40814 64711 860503 841144 8192 512 43987 57249 531737 489805 16384 4 10327 11318 167195 170184 16384 8 4285 20459 191569 291592 16384 16 20830 36544 641981 476085 16384 32 32806 39231 570253 628149 16384 64 34622 51976 732501 795845 16384 128 37232 62965 1365112 882378 16384 256 46982 71389 1499285 1245847 16384 512 51440 73236 1406232 1036761 32768 4 11354 14548 201877 220228 32768 8 20126 19743 362201 344230 32768 16 25489 31298 527996 346781 32768 32 43965 44481 746015 685683 32768 64 49532 60166 941015 836131 32768 128 50144 56381 942829 1028697 32768 256 41709 68990 1400112 635444 32768 512 49588 69149 992641 914413 65536 4 10117 12875 260405 206551 65536 8 19305 20218 305975 249663 65536 16 31721 38603 661926 597906 65536 32 42435 51202 793289 727231 65536 64