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 Sep 29 22:21:02 2026 Auto Mode Machine = Linux oleg213-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-oleg213-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 9609 15806 673098 19638 64 8 6191 7738 603489 842003 64 16 7049 48631 1013707 603489 64 32 12084 78909 1017549 1204796 64 64 10884 92220 998622 1562436 128 4 4689 9196 474349 177783 128 8 6147 24455 790905 630273 128 16 7608 51039 969421 814915 128 32 8402 63747 1165070 1102844 128 64 4055 31334 962469 1332828 128 128 27020 85342 983630 3053774 256 4 15946 18671 904732 668246 256 8 9660 11157 1368162 215662 256 16 19402 45551 52360 802614 256 32 9734 57632 1180188 184847 256 64 10434 146449 677095 1027695 256 128 25877 66788 1600674 1610276 256 256 10622 74328 2692393 2131261 512 4 10471 8056 488975 457124 512 8 14627 17608 802555 778128 512 16 14894 28245 1098566 859060 512 32 33686 59027 1171691 1003588 512 64 29881 85677 869143 743123 512 128 46402 102810 1524329 424168 512 256 21488 158033 851903 990168 512 512 34420 99182 1753325 914287 1024 4 6167 5624 521689 579867 1024 8 8399 14328 893517 544714 1024 16 30295 12912 1630707 881234 1024 32 31314 84832 1336827 1120288 1024 64 24777 63697 1278338 1005892 1024 128 56032 57149 1482144 1188159 1024 256 58786 40303 1703807 487410 1024 512 47816 72205 482374 1646334 2048 4 5676 5657 167403 593809 2048 8 18917 16995 867074 979378 2048 16 17324 27325 498319 1146730 2048 32 41894 58040 1753475 229697 2048 64 15811 43723 582613 707934 2048 128 26821 42131 979043 555630 2048 256 40349 44530 1666393 766219 2048 512 23683 99004 1741389 1582871 4096 4 8768 10582 425593 373924 4096 8 23978 33136 712981 638708 4096 16 19696 13542 963980 302911 4096 32 22045 20382 956360 772830 4096 64 18693 24368 1476592 692825 4096 128 18961 76718 1384155 531525 4096 256 35906 51269 1696642 1500319 4096 512 38277 51480 341250 420839 8192 4 7627 5262 288410 171589 8192 8 1803 15423 491894 697789 8192 16 25769 21789 765475 514153 8192 32 20698 19456 532851 1230570 8192 64 25146 53268 980731 429529 8192 128 37409 81249 802501 550762 8192 256 35353 31890 829308 1033848 8192 512 33180 64832 1250863 813579 16384 4 6483 4992 303008 255277 16384 8 10258 14664 638557 462589 16384 16 8407 16057 812817 564520 16384 32 17395 23911 660086 328087 16384 64 18270 28763 352057 412685 16384 128 19318 39560 908917 403210 16384 256 23623 38448 512175 616817 16384 512 52960 44662 1411315 784524 32768 4 5920 7752 432050 269340 32768 8 15493 20274 425127 306965 32768 16 19098 20726 1540643 970382 32768 32 29510 30482 325340 362546 32768 64 32602 48867 890022 818465 32768 128 44862 54793 960656 689650 32768 256 46445 63290 485293 387626 32768 512