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 Apr 22 10:59:32 2026 Auto Mode Machine = Linux oleg339-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-oleg339-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 10585 18136 877797 477808 64 8 13892 39605 811459 1083249 64 16 14984 49767 780776 831569 64 32 19710 67432 1933893 771797 64 64 18432 93019 2052169 1285575 128 4 15849 20938 597981 715059 128 8 23159 44154 969421 800337 128 16 27784 58528 1162547 1521718 128 32 25739 95873 1175271 1007629 128 64 31150 92694 1346196 1684006 128 128 24178 120867 1642783 2066432 256 4 19174 24633 833776 958864 256 8 23668 35217 826078 673696 256 16 34539 75161 2131261 1219045 256 32 54030 80679 1415041 1471270 256 64 45319 106176 1552085 1062263 256 128 57878 170684 1826695 2000242 256 256 49814 202066 1884399 1967260 512 4 15242 19539 856319 581846 512 8 29152 33642 1312798 764281 512 16 33652 55017 1053304 803757 512 32 59122 90125 1264113 1080328 512 64 79293 114515 1848401 1454140 512 128 72274 127774 1707325 1835760 512 256 72306 159595 1672748 1667552 512 512 82796 210955 1848401 2613128 1024 4 17119 20841 894262 698050 1024 8 31153 32468 703308 743098 1024 16 42058 63233 1151834 915223 1024 32 60231 79331 1242826 925080 1024 64 93355 112714 1640674 1369216 1024 128 93182 177472 1469467 1321200 1024 256 94091 170693 1438461 2044438 1024 512 98450 178334 1670020 1692394 2048 4 19884 21193 655980 769582 2048 8 36357 38314 1100454 958397 2048 16 57352 64102 1500214 1458688 2048 32 76952 87847 2094183 1854954 2048 64 87152 136115 1681397 1398828 2048 128 106583 164681 2467091 1616227 2048 256 127513 201396 2378293 1671581 2048 512 137053 195546 2199836 2096227 4096 4 22010 22155 954818 893769 4096 8 33567 42073 858315 1139943 4096 16 52475 63243 1150247 1358542 4096 32 61763 83604 1829435 1358113 4096 64 86607 115426 1854315 1508619 4096 128 90307 168164 2036783 1466509 4096 256 111238 155381 1948757 1619702 4096 512 115179 156186 2303918 1550416 8192 4 19256 22637 706949 901503 8192 8 34167 33749 1276421 944550 8192 16 57565 59227 1319356 1051212 8192 32 69565 82274 1403939 1224169 8192 64 80673 114827 1831073 1351851 8192 128 96670 131233 1798863 1534067 8192 256 92730 171668 1542192 1320015 8192 512 114555 145941 1666427 1556513 16384 4 18413 20044 891502 670376 16384 8 31042 37080 1219147 1109491 16384 16 49263 55832 1366795 1335920 16384 32 67304 89960 1402272 1163971 16384 64 82090 113496 1854886 1325995 16384 128 91708 137079 1894517 1406347 16384 256 102659 148231 1688032 1376459 16384 512 105838 163267 1736532 1653428 32768 4 17458 19367 643836 584548 32768 8 30531 32717 1071024 915741 32768 16 46260 55516 1170910 1123612 32768 32 69371 90542 1535170 1446972 32768 64 97015 122767 1996214 1499053 32768 128 111653 149194 1859700 1682058 32768 256 113047 155787 2217622 1399570 32768 512 122875 169735 2133588 1894538 65536 4 19598 20133 741156 635014 65536 8 29142 32234