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 22 01:53:26 2026 Auto Mode Machine = Linux oleg444-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-oleg444-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 1485 5181 633392 538156 64 8 2588 13716 727850 674790 64 16 2604 38624 852702 727850 64 32 4453 27236 1083249 901377 64 64 8361 38343 76264 1210227 128 4 4397 6207 615109 511887 128 8 5349 5431 831319 215887 128 16 2867 32660 1009524 836500 128 32 6443 7673 1306873 1024942 128 64 8064 80807 1291158 1377278 128 128 15847 30954 1377278 2098744 256 4 7220 8628 311066 506050 256 8 6762 14731 907792 307679 256 16 8982 37696 1168627 362162 256 32 18981 53647 1319408 1036624 256 64 18066 32080 300447 1325925 256 128 11844 61420 1540948 1445521 256 256 23319 92645 651223 1924938 512 4 5115 4468 398730 518740 512 8 9924 17239 120079 265718 512 16 5850 18243 545904 559560 512 32 13012 38449 592604 340664 512 64 19017 23490 424839 459964 512 128 38426 58830 1216149 1100818 512 256 31309 74943 660600 1375881 512 512 23081 83062 951980 708318 1024 4 4014 3977 140331 254413 1024 8 15608 16167 759659 664464 1024 16 16958 9452 747496 817963 1024 32 8973 35674 763576 724179 1024 64 19627 31845 891107 519543 1024 128 25942 47614 1206178 621755 1024 256 22204 128208 1013010 418131 1024 512 36638 111427 1023145 1594978 2048 4 6886 9028 255745 326070 2048 8 14565 16551 305400 365843 2048 16 18563 20195 1082973 993193 2048 32 30634 33518 843158 606470 2048 64 28946 36759 1008941 1206823 2048 128 25468 41566 1053487 501724 2048 256 37473 47506 1043885 904603 2048 512 25575 80974 359745 327312 4096 4 7219 8350 358445 366724 4096 8 14974 10439 423005 354050 4096 16 16416 29398 489652 323642 4096 32 22978 38690 812064 723551 4096 64 1359 36751 417059 811603 4096 128 24631 44933 696731 476281 4096 256 35917 36562 1010413 719340 4096 512 30952 47099 1064770 747444 8192 4 6747 7950 273667 319376 8192 8 13266 13754 284265 315039 8192 16 16634 19301 297838 421205 8192 32 20754 31183 477027 605022 8192 64 18355 26759 584390 270764 8192 128 24787 47570 811561 547820 8192 256 34068 46290 520185 553664 8192 512 44084 53327 688809 806059 16384 4 6050 8581 328686 348922 16384 8 11765 12968 375143 301453 16384 16 16435 19822 257484 556632 16384 32 22921 33017 690461 908653 16384 64 31710 31628 703690 461626 16384 128 35559 45098 684949 479597 16384 256 36036 55713 842668 503860 16384 512 29910 46950 910676 429282 32768 4 7762 7274 286403 262456 32768 8 10231 13033 318590 345184 32768 16 16292 20081 419516 517678 32768 32 23442 34603 534491 660498 32768 64