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: Tue Apr 14 17:28:19 2026 Auto Mode Machine = Linux oleg236-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-oleg236-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 3215 8032 537079 511494 64 8 9299 11575 621657 426897 64 16 12480 23087 926260 801764 64 32 9225 57335 380864 821391 64 64 12125 54319 688639 1421755 128 4 11776 13495 293724 486822 128 8 7173 13572 684954 1082825 128 16 6222 54750 120731 380811 128 32 14944 75553 627328 353482 128 64 11434 96597 352553 1220700 128 128 12609 105770 1406136 1911894 256 4 4193 4018 61332 287265 256 8 9799 13495 627256 1075025 256 16 13971 52149 882426 910872 256 32 29837 14146 987979 641880 256 64 13934 26851 686182 286345 256 128 20995 74334 1430119 1463250 256 256 38847 111641 1610276 2247235 512 4 6136 7688 537299 250470 512 8 16688 20972 520879 236825 512 16 9992 46410 992456 412517 512 32 13428 12981 1098566 1089647 512 64 19125 31833 1224470 706221 512 128 26181 31610 849208 250499 512 256 35018 106782 799865 997991 512 512 14213 54717 1299295 1672748 1024 4 6987 8931 559254 487853 1024 8 14062 9472 822506 217040 1024 16 20740 15676 902340 206451 1024 32 38388 20532 691420 631723 1024 64 37528 72924 639245 407809 1024 128 35372 61612 737231 941918 1024 256 37213 105772 978841 674587 1024 512 39914 87275 595711 605880 2048 4 6274 7549 391594 328050 2048 8 9779 10871 862979 195044 2048 16 18749 21953 494447 348478 2048 32 38161 51988 745019 908237 2048 64 31270 36705 165093 342996 2048 128 46972 47268 687040 889337 2048 256 24854 50644 400075 803412 2048 512 27361 101310 1360715 345257 4096 4 8700 12134 342243 164300 4096 8 9015 11692 708045 613089 4096 16 15551 23011 746340 670936 4096 32 31061 41435 562411 218696 4096 64 24570 49123 1681530 361873 4096 128 46294 115309 632384 724192 4096 256 26924 42261 824140 1411447 4096 512 83218 84542 1473932 1001461 8192 4 12542 6909 226981 220767 8192 8 9744 11900 528409 477664 8192 16 44053 36903 440974 512420 8192 32 16353 26151 393903 283302 8192 64 15112 28174 698911 417875 8192 128 18972 19042 1107028 578565 8192 256 16736 46937 908007 782061 8192 512 24520 35301 727408 677415 16384 4 4371 7919 468113 290631 16384 8 15078 16049 672304 630976 16384 16 21014 21487 292274 417425 16384 32 23844 28248 685407 431078 16384 64 28687 42432 1116159 986628 16384 128 32622 43123 592916 607444 16384 256 37194 57530 1268406 661076 16384 512 37467 66082 1433931 1003001 32768 4 8362 9502 347162 237773 32768 8 15186 16886 692828 592718 32768 16 23430 28761 407151 424092 32768 32 26037 30685 758167 655436 32768 64 28717 47212 658933 980223 32768 128 34566 41461 745335 531662 32768 256 36210 52439 925622 916047 32768 512