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: Thu Aug 27 05:48:59 2026 Auto Mode Machine = Linux oleg343-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-oleg343-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 1572 7983 496362 586352 64 8 2469 20719 811459 735831 64 16 4576 49574 1049372 743988 64 32 3365 37692 1310683 1279447 64 64 3359 91684 1562436 811459 128 4 3994 11409 20555 477725 128 8 5419 10479 859260 45134 128 16 12366 25161 1346196 1007629 128 32 3574 84655 1406136 1111981 128 64 10701 24020 1231904 1359835 128 128 7985 76425 1710838 1939522 256 4 9329 7997 695966 587127 256 8 11875 21162 741633 719277 256 16 14831 38624 930608 900936 256 32 17232 40893 945356 1254656 256 64 23637 53679 1274008 596919 256 128 18400 130216 1534342 1479379 256 256 26394 121963 1755037 1826695 512 4 3957 6514 628322 451075 512 8 9071 11531 518740 788992 512 16 12846 31663 1023680 549396 512 32 28862 19101 297855 198001 512 64 30101 32000 561462 647260 512 128 19638 58769 362089 530661 512 256 13626 82819 1053304 1174254 512 512 30848 64654 361054 1689859 1024 4 5954 5178 249637 330539 1024 8 6729 8610 196387 158125 1024 16 16861 23561 735590 276616 1024 32 12918 16974 1189476 1053512 1024 64 38425 55910 215040 332690 1024 128 18439 56778 228215 905384 1024 256 19908 52083 633307 468637 1024 512 35220 70499 1376236 1458489 2048 4 5748 8654 140379 359098 2048 8 7137 15640 215649 577870 2048 16 10279 17913 279285 239809 2048 32 14734 30118 702606 349542 2048 64 18124 31651 193830 532484 2048 128 18379 44877 469502 708401 2048 256 14470 35584 654480 826765 2048 512 27255 47113 677931 255875 4096 4 4902 7466 288466 389356 4096 8 1291 16174 728954 611714 4096 16 12503 14670 312891 667858 4096 32 24220 26061 633667 439677 4096 64 29636 35162 291471 478950 4096 128 26715 70953 590539 321986 4096 256 28156 48127 938595 522584 4096 512 37501 35378 596568 1510875 8192 4 5958 9587 184309 262530 8192 8 12488 11317 478335 358669 8192 16 15733 16389 183224 333684 8192 32 16956 25367 809001 541338 8192 64 27601 32028 327145 400431 8192 128 37239 53072 890337 437142 8192 256 35317 48709 340722 250887 8192 512 26104 48416 509956 721815 16384 4 5879 6149 142056 205418 16384 8 9492 13353 356087 436162 16384 16 16442 16952 519418 602708 16384 32 22558 25230 461090 541636 16384 64 22967 31909 556632 714274 16384 128 58741 48193 414575 392402 16384 256 31364 45655 586359 274081 16384 512 48081 63253 665694 543560 32768 4 5731 7272 313177 234031 32768 8 10583 11926 617553 464564 32768 16