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 14:24:51 2026 Auto Mode Machine = Linux oleg353-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-oleg353-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 3423 19446 456673 561808 64 8 6156 17191 901377 560635 64 16 6267 31529 460591 852702 64 32 10182 30830 969761 1226821 64 64 7933 64453 1279447 801764 128 4 5140 6390 586868 306117 128 8 7574 16760 870405 287742 128 16 10034 32347 1007629 859260 128 32 7832 34670 148110 1152564 128 64 9925 67549 1332828 1229084 128 128 11585 104068 257022 592699 256 4 10299 14304 654798 580461 256 8 11255 30225 713067 630572 256 16 12008 26471 737558 864661 256 32 7246 20101 530031 602276 256 64 19005 103644 1523457 1102624 256 128 17181 54805 1629830 485678 256 256 19494 95623 1274008 1405778 512 4 6665 11699 729492 519367 512 8 16715 12407 476286 449094 512 16 16416 29418 967855 1009722 512 32 20211 41230 1105920 1038532 512 64 17742 74008 747261 287488 512 128 28444 101951 1463057 1340664 512 256 28386 36775 1600443 1550747 512 512 38580 103919 782666 1968713 1024 4 8856 11615 220823 540396 1024 8 12817 17710 955115 427198 1024 16 29336 37002 677674 900637 1024 32 18498 32492 332999 292476 1024 64 35816 33849 337182 427028 1024 128 32074 80726 1012771 1174192 1024 256 34198 63673 976172 406343 1024 512 37890 82900 172976 1670669 2048 4 8995 9163 367157 428194 2048 8 16128 19856 311807 774928 2048 16 21858 30102 1131474 789530 2048 32 23900 36251 831165 624005 2048 64 25201 34274 1422220 721127 2048 128 50263 73043 835937 1368956 2048 256 65864 77053 1417292 1403858 2048 512 36095 69116 961078 270542 4096 4 9403 14150 272918 495943 4096 8 15234 19218 442132 336868 4096 16 13384 22820 661812 484625 4096 32 17568 41112 780342 598209 4096 64 21503 64920 1485145 545413 4096 128 23794 74900 1117040 1036692 4096 256 49451 67089 439531 892748 4096 512 41402 44239 596755 509066 8192 4 9257 9251 341776 242568 8192 8 15985 15654 255019 251744 8192 16 27120 33643 608203 646664 8192 32 32527 49381 1014884 885131 8192 64 40406 45816 1367616 701551 8192 128 49688 49811 1373356 739829 8192 256 47561 58610 625771 1075933 8192 512 42226 62578 587488 751627 16384 4 3283 8577 197287 324801 16384 8 12677 13900 664773 584767 16384 16 23508 21601 846582 753777 16384 32 26493 42358 953168 429822 16384 64 41851 61550 934732 846843 16384 128 47852 57431 1092262 750075 16384 256 45514 53496 1071134 776343 16384 512 56519 96891 703323 1093061 32768 4 12999 12503 371764 304498 32768 8 21619 24618 613277 557867 32768 16 27162 35024 904567 666908 32768 32 38478 39911 464616 588412 32768 64 42667 57406 696864 911309 32768 128 41975 70596 1047570 575017 32768 256 54564 62218 1102928 1002174 32768 512 52659 65547 1170033 1068999 65536 4 9299 12798 348532 266129 65536 8 18107 22675 976212 643329 65536 16 27757 26848 646286 674683 65536 32