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 Jun 11 18:39:53 2026 Auto Mode Machine = Linux oleg260-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-oleg260-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 1404 5838 679917 542506 64 8 2596 16359 463774 821391 64 16 4650 45391 874936 913649 64 32 2820 49813 1083249 1066042 64 64 8280 121694 1304314 1638743 128 4 6492 6923 627328 456986 128 8 5571 19683 1007629 819893 128 16 13223 28534 1155043 962469 128 32 9930 40660 1409828 426831 128 64 3841 94323 1349580 1471662 128 128 15692 83380 1196221 1598754 256 4 6942 4653 656399 393195 256 8 8955 9735 370025 648079 256 16 15127 30895 1048775 828628 256 32 29184 57918 638445 1004618 256 64 11968 57014 773697 477684 256 128 27213 153286 1561112 1453348 256 256 16033 26890 180163 1455317 512 4 8918 13148 251349 492338 512 8 9159 16265 785241 381245 512 16 38004 57289 705062 690996 512 32 37936 43294 1015932 1053304 512 64 32054 136349 1155924 850554 512 128 33352 147930 2370799 1312798 512 256 39227 114466 1729323 1387437 512 512 44114 254597 1551867 1657257 1024 4 10310 10838 301701 371961 1024 8 18863 37994 521879 788964 1024 16 23513 31215 1367037 177839 1024 32 22697 16799 1992279 1551758 1024 64 21103 77113 1414304 551145 1024 128 38265 45078 1065535 1108148 1024 256 38010 84768 1098511 1410588 1024 512 55527 55000 1058967 1076755 2048 4 4690 5642 325341 153110 2048 8 13611 15872 450896 515856 2048 16 16854 32866 1164293 314157 2048 32 25011 47074 1005399 711864 2048 64 42642 48628 1318727 320295 2048 128 29173 47344 1398828 341103 2048 256 47785 53688 1545562 1305301 2048 512 35707 33752 1270548 709864 4096 4 5245 5218 197064 173817 4096 8 13328 8502 384063 234189 4096 16 12762 15602 422225 280892 4096 32 13065 17537 628704 674572 4096 64 25824 27102 1005623 558880 4096 128 28301 25602 669733 324021 4096 256 31083 40337 1833535 785121 4096 512 26119 38346 956306 300070 8192 4 5610 6111 335256 218896 8192 8 12062 10762 592043 626775 8192 16 18862 21767 359438 678485 8192 32 22785 30709 687871 737289 8192 64 28302 32967 674463 770073 8192 128 38440 40877 655998 548065 8192 256 40496 50452 959265 919821 8192 512 31479 55718 401212 366645 16384 4 5840 6230 755999 308917 16384 8 15769 12713 346457 267031 16384 16 16716 18991 461533 323410 16384 32 13904 16393 1545063 1459483 16384 64 31093 33284 990696 819163 16384 128 26216 32158 1178361 998658 16384 256 19386 31356 971302 667478 16384 512 30900 53175 564343 351526 32768 4 5540 12008 227030 154694 32768 8 7186 10712 390076 320369 32768 16 16537 19215 768262 395649 32768 32