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 Aug 24 07:06:36 2026 Auto Mode Machine = Linux oleg615-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-oleg615-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 1717 8660 645579 581273 64 8 1513 2796 686877 68151 64 16 1944 24980 926260 372410 64 32 3283 38882 1087638 1066042 64 64 3192 10562 598110 1599680 128 4 3279 7317 377597 533241 128 8 6222 16690 726674 496272 128 16 2593 23912 1007629 753179 128 32 2892 36447 1142750 291017 128 64 7795 52718 1057236 1217930 128 128 4371 77483 156668 1684006 256 4 6758 8241 327779 166141 256 8 6600 16327 737558 282280 256 16 3917 16947 545931 253671 256 32 10359 44676 1163562 934659 256 64 14037 26285 337251 1128110 256 128 16194 52126 1028679 1479379 256 256 12860 79156 757326 2187712 512 4 4505 7537 583903 86279 512 8 10416 20959 863203 754083 512 16 16803 31156 1075459 873740 512 32 14866 34891 878027 312007 512 64 23036 34119 1201856 578554 512 128 19298 90140 1624659 1242896 512 256 21497 32534 1354190 1595686 512 512 17682 62226 1610042 906185 1024 4 2835 3809 411915 153661 1024 8 10798 10571 291563 646851 1024 16 11951 10895 527585 381374 1024 32 15552 35080 571154 246627 1024 64 21182 26427 230678 478025 1024 128 17669 28242 688096 276242 1024 256 22053 26991 1528563 1347311 1024 512 30438 62845 1399100 799390 2048 4 6515 5463 329737 163643 2048 8 11027 11757 492180 101845 2048 16 12915 18463 904126 915887 2048 32 8738 28761 910548 1125839 2048 64 21877 42277 538661 474954 2048 128 26428 52162 581784 319853 2048 256 16188 65343 861163 869267 2048 512 28148 37930 371283 353585 4096 4 5401 4697 180846 311033 4096 8 8916 9047 371956 415456 4096 16 19690 19321 588436 594134 4096 32 13408 22922 908804 509141 4096 64 38517 31889 634650 377092 4096 128 24919 18203 834225 488552 4096 256 23196 33348 1054833 303226 4096 512 39923 48971 875996 536488 8192 4 1757 6524 242509 326766 8192 8 6561 9065 239014 373313 8192 16 12086 13649 326962 351481 8192 32 24606 29654 615481 601959 8192 64 27858 35477 481452 697903 8192 128 38865 39748 740961 293029 8192 256 29006 38897 757743 524489 8192 512 25629 33937 685060 291500 16384 4 4130 5922 407744 340207 16384 8 12798 10568 612900 430511 16384 16 14327 14946 678846 525415 16384 32 17618 29776 648898 521286 16384 64 21949 34741 631730 440713 16384 128 29185 36900 537674 718561 16384 256 33303 39309 629283 599642 16384 512 37749 43999 1089284 873207 32768 4 7271 6551 290414 247165 32768 8 7543 9067 467941 374230 32768 16 14880 17066 667371 441956 32768 32 22626 22935 377089 255249