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: Sat Aug 15 09:21:14 2026 Auto Mode Machine = Linux oleg334-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-oleg334-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 3064 6063 653436 66464 64 8 6253 18620 608965 780776 64 16 3244 21827 503814 743988 64 32 5690 68586 1336792 1119387 64 64 3730 52165 1101022 1879725 128 4 3454 11972 584313 213994 128 8 9815 13684 723735 684081 128 16 11521 23730 1155043 1048974 128 32 2751 11980 1332828 1155043 128 64 5154 20907 1471662 568836 128 128 8870 74073 805138 1152564 256 4 4759 3915 661250 359495 256 8 14826 17655 790209 822913 256 16 9076 33367 618227 691930 256 32 11408 44214 1361224 1202660 256 64 15761 60279 1011241 1112909 256 128 15360 127935 1311351 203676 256 256 8809 34124 1829808 2205688 512 4 5833 6816 336395 431671 512 8 6678 6706 718028 1075459 512 16 17541 20917 557671 363622 512 32 15790 48102 1337324 1273861 512 64 19176 32728 774480 622133 512 128 36897 83729 94118 1438555 512 256 14847 71161 1635797 839252 512 512 27797 93925 1326585 2196227 1024 4 13361 11744 481887 436311 1024 8 14517 9197 899883 577606 1024 16 17014 14647 345593 342834 1024 32 26565 44023 1089593 272838 1024 64 23084 49511 1283303 1167807 1024 128 34489 23707 1313122 797608 1024 256 45698 106710 1267398 1490373 1024 512 30455 115484 1747480 1324868 2048 4 5105 7077 254502 288855 2048 8 7431 11100 577870 324505 2048 16 15204 14199 897795 598651 2048 32 15461 22763 1242611 496361 2048 64 17862 41510 917159 270474 2048 128 35046 32158 250094 787431 2048 256 28160 30142 473201 574469 2048 512 32984 60968 574469 899770 4096 4 5988 5432 265474 228915 4096 8 11165 11478 279858 369707 4096 16 12043 23070 891589 759774 4096 32 18886 24329 1345667 386161 4096 64 18900 37267 574792 834752 4096 128 19638 45705 807407 760345 4096 256 26507 40656 622215 694001 4096 512 24926 39758 674810 818369 8192 4 7405 4994 189218 210916 8192 8 15711 11744 261207 354279 8192 16 12104 17071 478422 546356 8192 32 19613 38048 1053372 814061 8192 64 36948 38781 749217 932730 8192 128 46007 45137 742226 735505 8192 256 29475 50239 622438 937182 8192 512 37271 97591 648311 840033 16384 4 5876 6249 253496 374167 16384 8 12557 10461 545766 487850 16384 16 21147 18195 418610 536548 16384 32 31543 26599 609027 619877 16384 64 17962 24989 485695 448520 16384 128 32201 36412 655677 790471 16384 256 32234 41049 1158789 584409 16384 512 34966 48125 1269976 970219 32768 4 6168 5508 253968 197330 32768 8 10081 11437 422263 370288 32768 16 19890 27323 640864 548538 32768 32