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: Mon Sep 21 09:24:37 2026 Auto Mode Machine = Linux oleg418-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-oleg418-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 2395 7118 347801 471099 64 8 3183 9995 901377 695778 64 16 4559 17625 852702 754443 64 32 4766 16064 115964 852702 64 64 3494 29424 1163036 1562436 128 4 4896 5483 524387 520321 128 8 3711 15932 735635 640042 128 16 5933 31038 646205 542400 128 32 5919 15481 1243315 819893 128 64 3172 37614 1266785 1266785 128 128 5327 45699 767171 2098744 256 4 4975 5633 460476 465466 256 8 3704 11862 888266 552960 256 16 8701 36739 1164824 1062263 256 32 6360 14392 1312954 370025 256 64 7260 32079 1098113 636553 256 128 7403 33350 1662639 1591186 256 256 6590 66544 1778290 913973 512 4 4888 4530 577776 264866 512 8 10099 15456 407275 503536 512 16 8161 19522 924123 781526 512 32 15909 20501 675563 918982 512 64 9703 35839 1062161 977103 512 128 11870 25025 915847 667582 512 256 6400 34267 1213400 262438 512 512 12323 66305 816594 1947291 1024 4 5222 8863 184074 257356 1024 8 6588 8585 296802 302594 1024 16 17546 12847 772225 483896 1024 32 12273 19710 524620 877454 1024 64 18226 15689 1073257 733579 1024 128 20316 32260 1475525 785357 1024 256 17898 38008 1456510 542375 1024 512 26119 35315 1656494 768632 2048 4 5664 4406 276792 140611 2048 8 6886 12307 326268 466950 2048 16 23636 36531 653485 516010 2048 32 9953 23960 387216 637812 2048 64 10802 20293 412564 392722 2048 128 31497 48008 775488 295992 2048 256 35893 56507 848069 1367213 2048 512 30609 31895 426134 476376 4096 4 5255 5943 343365 314887 4096 8 5692 5821 155169 109592 4096 16 16612 23959 457497 435928 4096 32 17525 21194 650560 198816 4096 64 31281 29131 1259908 705370 4096 128 25375 29907 803743 269793 4096 256 27680 46661 893769 622576 4096 512 30848 34685 1791845 536337 8192 4 2068 5691 421184 390168 8192 8 10191 13476 456785 288014 8192 16 15710 20276 443793 445340 8192 32 26136 28673 561206 519768 8192 64 28269 39151 833634 468705 8192 128 42447 59672 753489 686373 8192 256 28740 55431 763247 645498 8192 512 33773 57658 918689 824967 16384 4 5997 9049 314448 191650 16384 8 12923 14784 514410 454200 16384 16 26339 29216 496439 415678 16384 32 27225 31104 556519 756840 16384 64 30039 30492 771013 738650 16384 128 30453 34202 1253757 838494 16384 256 35635 47504 964445 453939 16384 512 26067 45405 730088 444217 32768 4 8508 9648 468180 307827 32768 8 12120 15664 571329 518252 32768 16 26969 25486 526790 567018 32768 32 23128 31563 603316 593235 32768 64 24481 34640 450921 458069 32768 128 29896 34297 367675 783602 32768 256 25618 40872 418754 676943 32768 512 34600 47521 922781 827956 65536 4