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 Aug 27 17:06:08 2026 Auto Mode Machine = Linux oleg133-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-oleg133-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 2546 9255 169273 524487 64 8 1862 11560 193424 831569 64 16 4202 14558 528618 852702 64 32 3498 43479 969761 1183548 64 64 4933 51151 1210227 1722886 128 4 1646 5875 637004 421139 128 8 5981 20467 407397 609522 128 16 6123 24965 1015251 581781 128 32 6321 39566 1406136 1142750 128 64 8828 39925 1319723 1133103 128 128 11199 80204 1504659 743788 256 4 3877 11069 619655 639967 256 8 9889 17851 888266 775933 256 16 10388 21616 1180188 965763 256 32 6010 23171 439193 930608 256 64 15931 53343 1032636 1280084 256 128 18077 97899 1570244 1497953 256 256 10356 79649 924200 2000242 512 4 7325 11287 408670 419692 512 8 12135 21757 677267 544658 512 16 16174 33128 1135150 606495 512 32 17940 45931 1196499 1047141 512 64 19211 55172 1339827 1120344 512 128 19294 68706 953248 1293037 512 256 21526 69916 1550747 1695195 512 512 25733 71537 1528669 2169601 1024 4 9739 11344 424370 475432 1024 8 16058 19320 532160 397174 1024 16 19885 32726 1084914 913471 1024 32 28346 35955 632467 620946 1024 64 30129 60086 1372717 1210257 1024 128 33612 71503 1049138 1410588 1024 256 15177 29400 560495 405537 1024 512 25111 95095 1544504 1643814 2048 4 10359 13019 369002 218479 2048 8 16949 20293 627836 339861 2048 16 24644 31877 436396 630370 2048 32 34101 41088 898640 779004 2048 64 35012 28194 1281543 1310279 2048 128 19783 53532 1559592 630324 2048 256 33464 48997 2033695 616127 2048 512 48724 84123 1753117 1945270 4096 4 5416 8017 290147 455871 4096 8 15637 12454 319448 380626 4096 16 20562 21175 555303 245606 4096 32 13915 28779 818876 641379 4096 64 19946 32263 902977 290515 4096 128 20799 43960 802354 918964 4096 256 27659 29718 1023232 642603 4096 512 22378 37266 664192 785264 8192 4 6650 7154 362605 340607 8192 8 6606 8132 277704 345696 8192 16 16937 14005 184666 501442 8192 32 28753 37245 613678 405444 8192 64 2505 41943 366943 449294 8192 128 37537 37241 1179903 570108 8192 256 22813 37326 1041715 666948 8192 512 34251 32311 382839 593106 16384 4 4671 4876 217505 155464 16384 8 8107 9226 389586 352579 16384 16 16936 17356 655884 581841 16384 32 16897 30711 917718 1066744 16384 64 24577 33475 330561 565784 16384 128 23684 30736 1064794 542226 16384 256 27613 44526 367378 450628 16384 512 37343 38457 1125961 964730 32768 4 5204 5000 184486 137944 32768 8 7581 9494 310282 284951 32768 16 14767 16876 382178 301572 32768 32 17050 20391 522365 578162 32768 64 24017 38070 799785 654955 32768 128