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 Oct 2 01:39:20 2026 Auto Mode Machine = Linux oleg330-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-oleg330-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 4352 11361 645579 484710 64 8 6875 23255 942521 889431 64 16 8491 40126 666414 743988 64 32 6720 75555 1452528 1143223 64 64 9549 77474 1648808 1679761 128 4 2524 7978 649331 609522 128 8 11431 17304 702889 757430 128 16 3908 34215 336005 859260 128 32 11416 57555 1336145 253862 128 64 13485 76501 1455701 1440082 128 128 11622 92967 1598754 1975201 256 4 4782 8996 446870 621448 256 8 6255 26032 944525 789628 256 16 7524 22939 135303 955451 256 32 20124 30646 1430119 122074 256 64 19200 110344 1662639 1347557 256 128 11718 44896 1639786 1662639 256 256 22683 46725 1430119 1027695 512 4 3864 4911 603767 570107 512 8 11055 17031 535558 435789 512 16 15108 29268 530661 1110496 512 32 23154 59368 716112 585814 512 64 18603 28988 1463057 664073 512 128 20506 35565 1100818 958781 512 256 11689 54624 1463057 1585086 512 512 43283 88138 1451192 2942541 1024 4 14503 14893 645199 341444 1024 8 10771 19305 658858 374687 1024 16 26685 28368 819055 1041758 1024 32 33935 29725 826462 976172 1024 64 30060 41565 1062110 663232 1024 128 25136 67342 1324868 998178 1024 256 34409 60221 867879 1026078 1024 512 37037 75349 325060 336944 2048 4 6209 7029 103325 273906 2048 8 8630 11855 831165 517035 2048 16 13838 30297 638238 323747 2048 32 15543 37118 486935 261355 2048 64 29275 28044 952975 678145 2048 128 38554 27859 766492 1366343 2048 256 47509 64990 655779 1082563 2048 512 31820 40070 414236 906607 4096 4 6460 8116 422008 306817 4096 8 16451 11528 852818 402048 4096 16 17965 28164 525735 521981 4096 32 32800 32712 1423257 642218 4096 64 29573 44975 1545674 710857 4096 128 37485 89960 1013334 628704 4096 256 27958 69454 482908 861586 4096 512 59153 93070 720366 304037 8192 4 7747 2141 396361 270773 8192 8 11720 13778 450756 507403 8192 16 15160 28268 1096221 315879 8192 32 15151 30993 604086 522678 8192 64 25247 28495 831858 482846 8192 128 40158 45984 783685 438358 8192 256 31929 48014 836780 738429 8192 512 48228 52009 940208 647383 16384 4 7844 6857 457971 347465 16384 8 12510 10758 266000 240573 16384 16 16792 20419 467632 336504 16384 32 22291 37638 786823 796841 16384 64 31296 42385 1040387 896924 16384 128 33750 46924 722748 382793 16384 256 36145 58409 775170 828986 16384 512 43691 62026 677247 1114331 32768 4 7630 8251 241265 155781 32768 8 17092 16658 462904 375533 32768 16 17060 26812 438339 375190 32768 32 28469 37904 876150 920187 32768 64 34662 41137 862087 497419 32768 128 29836 45448 779951 739934 32768 256 45995 68681 648640 457666 32768 512 48203 66556 1214030 912604 65536 4