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: Sat Aug 22 03:41:20 2026 Auto Mode Machine = Linux oleg246-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-oleg246-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 1083 1520 477808 201860 64 8 1437 5543 743988 681644 64 16 1906 4918 877797 877797 64 32 1855 10919 1143223 998622 64 64 1740 54796 1124074 1392258 128 4 1378 2901 522346 412721 128 8 2329 6684 718889 631014 128 16 2563 15719 1165070 919605 128 32 3552 11650 1240443 853794 128 64 4986 41384 1007629 146134 128 128 5403 44535 889145 1975201 256 4 2586 3299 530031 133122 256 8 4064 8353 239044 204335 256 16 3975 9912 987979 703260 256 32 6028 8263 1079348 544823 256 64 5136 21183 641497 572721 256 128 3851 22497 864661 399337 256 256 8389 59052 1376935 459687 512 4 4062 11205 260181 242878 512 8 11959 6152 267206 38180 512 16 3713 3343 489420 792486 512 32 7919 6834 151660 325287 512 64 6461 11138 1080328 1034530 512 128 7009 18569 365168 718990 512 256 21427 24916 759416 570107 512 512 14736 59541 1580419 993834 1024 4 4420 1583 97420 72036 1024 8 2469 2963 57315 43889 1024 16 4229 4778 230939 93413 1024 32 12066 13760 192041 253902 1024 64 11862 17401 1163693 244855 1024 128 14046 28113 856970 276153 1024 256 28235 23677 197489 727368 1024 512 13747 69654 1426517 393246 2048 4 2107 6938 701344 273105 2048 8 6356 14005 524486 1006341 2048 16 12602 13780 978931 154615 2048 32 9684 17917 334085 958825 2048 64 23163 18975 216328 170439 2048 128 29949 19755 507445 487737 2048 256 30565 13486 230399 91147 2048 512 14940 35443 125674 1284033 4096 4 1050 4078 175042 207981 4096 8 8748 7469 354906 442577 4096 16 14523 19065 730380 272269 4096 32 14159 21753 757529 492248 4096 64 17373 16536 465354 1214742 4096 128 26246 33881 177161 446964 4096 256 30009 36838 698374 304716 4096 512 30793 51506 248361 388501 8192 4 4087 4556 279048 236006 8192 8 6413 9854 418853 291446 8192 16 12931 13078 549239 524826 8192 32 21134 20979 480442 811331 8192 64 19145 26088 439226 477943 8192 128 26268 31266 361518 456330 8192 256 30092 51698 838312 515549 8192 512 23379 56952 573830 373009 16384 4 4851 5397 212925 240436 16384 8 8358 10478 426112 331418 16384 16 12531 11595 552190 509834 16384 32 23330 32988 465151 418547 16384 64 28564 29949 557124 657119 16384 128 23943 41687 776203 634969 16384 256 29630 42697 728857 598675 16384 512 35017 38748 743437 465481 32768 4 4076 5031