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: Wed Sep 2 10:35:57 2026 Auto Mode Machine = Linux oleg357-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-oleg357-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 3234 8151 571375 524487 64 8 4194 8719 818885 659861 64 16 4040 21888 926260 831569 64 32 4002 32451 1330167 1049372 64 64 3671 62198 639427 2067979 128 4 5514 5277 526444 373136 128 8 4594 10804 299792 450846 128 16 6994 20555 1015251 338761 128 32 5670 22479 1243315 168625 128 64 9174 65242 895074 748976 128 128 5711 69266 1618028 1406136 256 4 8285 13176 632056 582035 256 8 12900 27251 621448 282206 256 16 15071 36270 1093639 1219045 256 32 11749 46595 1272498 823544 256 64 20286 74899 1208072 1123389 256 128 10568 92685 236412 1292410 256 256 11913 81685 1572543 2049885 512 4 7270 13264 365168 393542 512 8 12572 16280 626672 563376 512 16 13816 21463 749870 461645 512 32 13491 45837 1216149 577155 512 64 23483 47650 856319 1418599 512 128 21092 92318 1789859 606667 512 256 23633 36707 904658 1438555 512 512 18538 66038 1700565 2922519 1024 4 7613 11385 665803 351418 1024 8 14540 21172 627478 517166 1024 16 17766 32789 908640 931702 1024 32 20108 55059 761275 576288 1024 64 28928 60466 1288307 738753 1024 128 21228 100648 1528019 664053 1024 256 31685 65256 721139 1597945 1024 512 29279 132076 1197435 775152 2048 4 10271 8264 494674 574469 2048 8 10931 15716 447653 843158 2048 16 15529 28741 1037456 755171 2048 32 33560 32435 441192 1185177 2048 64 40916 51405 1034457 573510 2048 128 38491 59677 423236 1178348 2048 256 41368 90100 1861789 1020933 2048 512 47084 72877 1639674 1180454 4096 4 8940 11686 337954 345798 4096 8 16620 19610 497869 486863 4096 16 25289 30086 780200 856176 4096 32 33760 58892 635119 777657 4096 64 34526 52015 748682 1080712 4096 128 36781 78593 1134298 909189 4096 256 45057 101969 1427752 607345 4096 512 63011 92352 1805213 771234 8192 4 8772 9839 500733 464554 8192 8 16853 18300 461026 606539 8192 16 23661 28455 551433 613130 8192 32 36597 44837 1376823 986022 8192 64 37467 57816 980144 659574 8192 128 47249 47492 743237 425582 8192 256 42300 68915 1217445 1016867 8192 512 52582 85386 997906 626010 16384 4 12152 12356 538875 483705 16384 8 20218 4812 794253 835700 16384 16 27790 27418 864452 881812 16384 32 38837 40011 743509 718471 16384 64 39047 49114 1012429 545753 16384 128 50391 74516 1630092 916274 16384 256 55380 62164 886670 896877 16384 512 51712 79230 1244426 1083377 32768 4 11668 13380 494732 380037 32768 8 18313 18820 688724 634066 32768 16 26800 30314 981518 851337 32768 32 38347 48873 996773 937536 32768 64 41224 60878 949965 964640 32768 128 47625 64001 890917 1022886 32768 256 44743 71334 1272208 917772 32768 512 59529 70872 1283015 639936 65536 4 10223 12214 545066 405238 65536 8 19712 20862 705856 656561 65536 16 30692 34983 1042006 964345 65536 32 44948 46407 1002816 640180 65536 64 45022 58164 1166556 906910 65536 128