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 8 08:13:20 2026 Auto Mode Machine = Linux oleg348-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-oleg348-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 4608 12976 620221 620221 64 8 5758 20094 415659 633392 64 16 7872 27597 952555 346008 64 32 7047 51733 1101022 821391 64 64 4884 77030 1526887 1452528 128 4 5598 10720 296973 490380 128 8 7727 19717 767171 670413 128 16 9472 38825 1057236 669577 128 32 13310 50040 1185654 962469 128 64 12098 33126 940549 1048974 128 128 12947 89765 1406136 1939522 256 4 1461 7794 198590 246621 256 8 4263 18705 458902 690151 256 16 6204 8945 889002 576720 256 32 22283 36307 449865 629094 256 64 19591 26550 437760 1190657 256 128 12213 95521 113373 389629 256 256 25546 32019 1254656 891956 512 4 6934 13920 515131 643960 512 8 12777 25652 764281 616950 512 16 24984 21568 999850 896725 512 32 30245 60591 382059 757541 512 64 28202 78381 643960 157096 512 128 15881 117164 1365383 1399189 512 256 34174 89479 422832 1695195 512 512 37473 94478 1520013 402466 1024 4 4569 5202 171327 255351 1024 8 11629 14324 550227 540941 1024 16 22425 16518 1004011 698390 1024 32 24161 11863 421207 217501 1024 64 36236 75449 951728 852716 1024 128 45960 61372 387010 355667 1024 256 32681 61992 430970 742456 1024 512 61660 133455 1291018 1202127 2048 4 8417 6908 499391 339351 2048 8 10139 13292 760520 347773 2048 16 18706 37858 665535 34778 2048 32 39139 59173 605402 889245 2048 64 41065 28289 1054004 622107 2048 128 27365 37855 376738 567786 2048 256 29538 74818 1496033 1043885 2048 512 58247 63284 1084751 562028 4096 4 10004 9412 566603 305372 4096 8 12480 11581 350897 630643 4096 16 16463 19030 178412 734314 4096 32 12663 19861 1124351 856902 4096 64 24914 77581 1372653 1029363 4096 128 26133 35493 562245 551064 4096 256 45076 42036 1497051 1165621 4096 512 27891 128692 1459780 1303994 8192 4 2400 7712 585725 476531 8192 8 12512 12108 616585 384024 8192 16 33718 23954 1039194 822893 8192 32 29098 58096 714149 611842 8192 64 50446 40835 464818 738810 8192 128 43120 72048 1442970 576662 8192 256 46778 77719 1637128 1209304 8192 512 31916 42324 973148 1368979 16384 4 7468 8264 267375 193623 16384 8 8367 14385 349853 396734 16384 16 17355 16435 489309 886968 16384 32 24289 28567 1247453 668543 16384 64 47155 24649 727699 832894 16384 128 57334 28538 1223053 836768 16384 256 54341 55051 493179 1354163 16384 512 34058 57920 1273436 1046232 32768 4 8212 8562 474114 370767 32768 8 12246 14361 382736 696271 32768 16 21099 19387 966010 833793 32768 32 27427 22087 990988 287380 32768 64 38306 31053 1061617 906046 32768 128 28369 36686 1093103 869433 32768 256