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 Mar 9 20:28:46 2026 Auto Mode Machine = Linux oleg115-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-oleg115-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 2280 8048 598110 477808 64 8 6081 26631 913649 760859 64 16 9696 33630 983980 863676 64 32 5745 25538 1183548 831569 64 64 2472 64968 674790 1210227 128 4 5156 8795 490828 79704 128 8 4069 14481 739689 627328 128 16 5112 29500 268864 940549 128 32 15128 37837 666253 774922 128 64 13141 27020 391360 1306873 128 128 14807 111203 1827299 1579934 256 4 6468 8453 345498 741633 256 8 7457 17555 437760 921029 256 16 12459 28536 855703 1175022 256 32 31349 75024 303676 483927 256 64 12010 62347 1219045 1158540 256 128 15372 133603 1814348 524593 256 256 30079 97935 1430119 980760 512 4 7440 9166 703445 375381 512 8 16352 20845 630536 713258 512 16 22146 40995 1040545 554074 512 32 27577 21177 577776 265981 512 64 40910 66227 387856 844865 512 128 23692 51697 1045103 532767 512 256 26562 49795 849208 1166599 512 512 28189 64990 282570 193348 1024 4 7096 10528 528949 229483 1024 8 21853 14556 499309 285554 1024 16 24727 43963 468024 915809 1024 32 36473 53388 1238168 909410 1024 64 34829 92301 941093 956178 1024 128 61742 57363 674163 859886 1024 256 63638 76918 1780809 1497127 1024 512 42349 88330 794951 1426517 2048 4 12558 9873 458061 282444 2048 8 14450 18282 411005 229647 2048 16 23018 32655 763020 773951 2048 32 20951 35329 797816 1195569 2048 64 27104 54819 581823 774300 2048 128 27409 75211 1477760 941176 2048 256 36780 109442 1280969 1405695 2048 512 45743 75236 876004 806657 4096 4 8916 9527 244581 347497 4096 8 14560 18784 490072 208917 4096 16 21879 24885 349818 462448 4096 32 27275 55709 946663 764031 4096 64 27910 65642 902029 723429 4096 128 35330 58981 1074829 533407 4096 256 43091 77156 739497 1060825 4096 512 47383 61975 897270 628314 8192 4 10353 10454 308713 245815 8192 8 21412 19493 574070 640301 8192 16 29286 37716 427063 732136 8192 32 40649 37706 1318293 1170936 8192 64 35132 57134 891122 1026282 8192 128 48592 107094 1300972 1377044 8192 256 45173 87694 1058662 860503 8192 512 52452 119544 790354 972928 16384 4 9567 10466 475465 471198 16384 8 14275 16399 870519 404192 16384 16 21349 31541 911232 591823 16384 32 36758 44902 717750 636546 16384 64 35612 54087 1081450 723707 16384 128 43504 79463 1273837 1122119 16384 256 53185 75206 1490408 498462 16384 512 56322 100790 1488504 1264392 32768 4 10012 10068 447711 366360 32768 8 14579 19135 497275 714321 32768 16 23600 27806 931885 799766 32768 32 49065 59253 981224 988777 32768 64 49627 69006 1322790 1018045 32768 128 56888 73233 816219 1004077 32768 256 53311 68198 910271 703765 32768 512 61972 90500 1168322 973206 65536 4 10097 12269 457542 373420 65536 8 17113 16894 484475 739593 65536 16