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: Thu Jan 22 04:30:55 2026 Auto Mode Machine = Linux oleg306-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-oleg306-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 5591 22175 376589 115714 64 8 7378 32534 321554 450541 64 16 8882 49464 760859 566551 64 32 5347 35456 877797 718114 64 64 6207 74777 1232453 1421755 128 4 4324 13937 275911 83070 128 8 9878 31730 247999 425141 128 16 6454 35904 606767 581781 128 32 6275 75341 990891 535903 128 64 10500 75204 907174 1105114 128 128 18010 66290 889145 1487977 256 4 7863 8623 287342 258061 256 8 9262 15473 224125 377041 256 16 18100 41674 707430 414923 256 32 20254 62409 1012194 930608 256 64 23750 71731 958008 1132871 256 128 41981 45935 540164 1430119 256 256 26958 177044 1256123 1752173 512 4 6314 3602 51282 62814 512 8 7969 13006 83065 316606 512 16 9961 29492 488975 580588 512 32 24162 36534 949875 962649 512 64 34137 98577 727268 377293 512 128 22467 71279 773364 1319250 512 256 29252 49850 141441 1566585 512 512 21831 110942 581059 1909204 1024 4 3465 9816 440608 93318 1024 8 13966 15849 234264 415060 1024 16 24142 22442 616048 621755 1024 32 40891 94316 1023877 618354 1024 64 30605 38085 516420 1135091 1024 128 41464 56976 1365299 335078 1024 256 48827 186690 557150 631630 1024 512 43048 120941 1662264 1376236 2048 4 11381 8812 205212 98731 2048 8 10145 20728 310545 271800 2048 16 11710 17466 339915 457548 2048 32 27814 40813 935538 410907 2048 64 23322 38460 1174321 306906 2048 128 31671 40683 691631 393099 2048 256 28259 56863 644850 1384846 2048 512 44125 93876 410161 842414 4096 4 9514 5551 134569 115007 4096 8 10931 16275 142597 75552 4096 16 11428 18803 408540 318111 4096 32 30847 37179 471019 242626 4096 64 26107 41795 747997 678944 4096 128 35700 58795 1422668 422350 4096 256 42715 52254 1618329 443285 4096 512 37226 68708 601455 691181 8192 4 6978 6849 126537 121711 8192 8 14555 3261 339352 367139 8192 16 19887 14704 156662 249497 8192 32 20003 33133 609887 479009 8192 64 25822 51294 871503 515510 8192 128 28770 45846 869716 568928 8192 256 49383 43457 1151704 883333 8192 512 21809 38136 1032667 1220342 16384 4 5148 7268 168804 129957 16384 8 12869 11954 192607 145408 16384 16 20296 20015 276388 171335 16384 32 31005 24545 905994 531519 16384 64 33397 47398 561209 662166 16384 128 31763 83518 954824 601489 16384 256 33866 57759 867847 662600 16384 512 40780 64407 452147 1219862 32768 4 7118 8159 76783 110831 32768 8 10980 13166 243715 264049 32768 16 15104 19502 314620 346059 32768 32 21985 25101 612533 272655 32768 64 28686 32505 602617 383992 32768 128 34178 66424 834963 853664 32768 256 36628 46320 341867 1020744 32768 512 36226 59639 1132081 497971 65536 4