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 Aug 24 01:26:10 2026 Auto Mode Machine = Linux oleg307-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-oleg307-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 1970 9287 551422 438759 64 8 2734 13002 306501 312204 64 16 2869 25177 363829 481234 64 32 2857 17457 1163036 983980 64 64 2165 51823 983980 1679761 128 4 3122 5665 589446 516318 128 8 4791 7261 627328 460514 128 16 4606 29425 107206 458548 128 32 3580 24863 526961 1024942 128 64 4335 67507 187664 1217930 128 128 4908 45486 513847 955616 256 4 3503 6296 555248 187428 256 8 4462 8369 507006 622890 256 16 6451 26283 862577 100267 256 32 7305 31988 1206714 529770 256 64 11887 20512 1260547 1201314 256 128 14832 79649 1248819 1012194 256 256 9836 49969 216227 2187712 512 4 7090 10729 337029 298559 512 8 11428 10855 749608 406350 512 16 13853 12243 357032 778128 512 32 18130 51581 1045103 225865 512 64 11629 20159 336659 299768 512 128 9630 35652 915847 1325766 512 256 13332 35990 453936 925717 512 512 12133 46465 815353 2073249 1024 4 4627 6466 225058 133542 1024 8 14018 10114 494708 449508 1024 16 13024 24942 963255 408623 1024 32 10595 26338 126920 540124 1024 64 13552 21374 201814 636404 1024 128 15757 20955 1088213 450498 1024 256 15608 69565 1678504 1517224 1024 512 36817 56091 1684429 1262555 2048 4 8439 8912 242654 279213 2048 8 8972 13564 150865 597610 2048 16 14933 16282 203015 888876 2048 32 21284 34641 247464 976594 2048 64 27842 25861 288496 951286 2048 128 25018 60060 393928 681534 2048 256 24601 39041 647915 483482 2048 512 17807 49976 1413328 706710 4096 4 7485 5845 139814 426746 4096 8 18041 19973 465291 357632 4096 16 9556 26699 273104 196104 4096 32 37241 28239 452187 233242 4096 64 20863 23774 371418 378454 4096 128 15955 38151 432428 205776 4096 256 47903 73178 886574 1147328 4096 512 15808 63229 759505 677364 8192 4 4642 1517 185831 164359 8192 8 9111 6254 462173 332184 8192 16 16824 33069 599627 694700 8192 32 28785 58133 958141 505276 8192 64 27940 28027 748744 630398 8192 128 34988 33076 404985 426379 8192 256 34306 43853 547157 902996 8192 512 34633 42378 650151 831676 16384 4 6356 6920 131059 259931 16384 8 11193 12862 489058 547575 16384 16 16400 23726 620672 626683 16384 32 19058 20613 682270 477070 16384 64 22481 34251 538732 652700 16384 128 33219 53903 765644 599689 16384 256 38313 50710 997918 819974 16384 512 41298 50037 931703 384754 32768 4 6736 6417 346267 306360 32768 8 10349 11799 295577 245245 32768 16 16667 22024 542651 539480 32768 32 23531 25331 689055 501423 32768 64 21542 30316 560376 665651 32768 128 28933 37612 620430 727144 32768 256 33797 50918 581518 711389