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: Fri Sep 11 06:46:07 2026 Auto Mode Machine = Linux oleg215-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-oleg215-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 1281 4409 516414 512471 64 8 1962 6122 710511 528618 64 16 1540 16394 831569 771797 64 32 1992 15020 901377 1002351 64 64 3417 30003 491815 1421755 128 4 4715 2659 63364 102655 128 8 3835 13710 723735 617941 128 16 2047 21017 1123617 901083 128 32 6010 15964 1306873 430942 128 64 3464 35834 1231904 983630 128 128 2610 66801 1281909 780556 256 4 4385 2868 592309 530031 256 8 8084 15500 833776 242664 256 16 3547 15869 1016025 873098 256 32 7160 28174 1237306 955451 256 64 5048 34777 1168627 1230218 256 128 6484 30589 1306564 1306564 256 256 6886 99000 1718521 805021 512 4 4528 3153 112305 518740 512 8 3693 3253 101025 572081 512 16 6728 17648 1007827 1094088 512 32 9887 33822 1258188 563968 512 64 22184 45342 957072 639359 512 128 8970 41160 764281 1101383 512 256 13935 32368 1640796 1053304 512 512 11875 57971 1010197 1862832 1024 4 9912 10265 624376 327140 1024 8 8753 8124 762491 411560 1024 16 12734 20258 499542 185681 1024 32 23494 38497 463128 950675 1024 64 24994 21256 694214 640007 1024 128 32496 59431 1225101 759659 1024 256 31184 64337 868581 1124099 1024 512 32163 43781 334634 1408275 2048 4 4736 3862 111153 253653 2048 8 14084 11509 628387 564948 2048 16 21340 15119 1012390 376820 2048 32 14143 23396 720100 1020448 2048 64 11110 34984 796854 490999 2048 128 40895 60696 306315 296216 2048 256 17249 30718 1211931 937683 2048 512 28354 62783 420255 1558743 4096 4 5184 4207 188860 209869 4096 8 9935 6579 269848 314547 4096 16 9232 13801 360430 428417 4096 32 27218 29388 753377 496731 4096 64 25411 34400 447837 1244574 4096 128 43645 46860 708161 540573 4096 256 33829 23128 1100793 656301 4096 512 38104 51176 496000 542228 8192 4 3598 4623 106242 170106 8192 8 5395 7683 198248 197439 8192 16 11411 15091 755427 404242 8192 32 14095 24208 635681 784526 8192 64 20289 28327 190635 165230 8192 128 16613 25147 482222 335863 8192 256 16699 39722 409454 324488 8192 512 17852 38540 514638 330563 16384 4 4553 5982 248047 145670 16384 8 7100 10641 322601 207820 16384 16 12316 14202 756490 352684 16384 32 13606 16559 566488 843413 16384 64 16008 51327 499967 322437 16384 128 31323 53686 961275 838698 16384 256 16591 36199 663643 729871 16384 512 34907 35688 430930 703539 32768 4 5426 4582 150371 148438 32768 8