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: Sun Aug 16 22:47:40 2026 Auto Mode Machine = Linux oleg329-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-oleg329-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 9408 16372 780776 571375 64 8 9992 30101 855419 712397 64 16 11552 47303 1163036 874936 64 32 16537 70403 598110 2006158 64 64 17176 70091 2467108 1526887 128 4 12006 18401 650117 486822 128 8 13919 39023 677178 819893 128 16 24975 60898 1455701 1294270 128 32 16679 87313 1306873 695603 128 64 34124 110539 1421023 1133103 128 128 39910 125501 1579934 2367096 256 4 14270 18404 1062263 571198 256 8 24203 39981 895676 737558 256 16 36342 74139 1471270 913973 256 32 41204 80401 1184092 1325925 256 64 39029 113577 1985448 1128110 256 128 55968 127298 1471270 1361224 256 256 37575 171694 1591186 2563818 512 4 18718 17891 648041 609594 512 8 28710 33459 971357 824748 512 16 46951 57444 1080328 1150968 512 32 64580 100826 1869318 973118 512 64 64321 128577 1475116 2081286 512 128 73298 163011 1718254 1657257 512 256 71071 244037 2160868 2263354 512 512 94691 179273 2449212 2205248 1024 4 17208 22071 839220 574361 1024 8 29514 35485 885778 852547 1024 16 52862 59421 1544504 1429841 1024 32 66989 99913 1367037 1727102 1024 64 94736 162075 2019445 1790460 1024 128 101096 149531 2174880 1560781 1024 256 58204 155508 2331932 1166221 1024 512 109073 188857 2169388 1771262 2048 4 16631 18990 859783 733254 2048 8 35378 33845 1486197 859783 2048 16 49422 63913 1407538 1178348 2048 32 66558 83611 1756343 1777789 2048 64 85496 120898 2043857 1320349 2048 128 77930 172930 1898409 1606254 2048 256 108659 158747 1957683 1903035 2048 512 89211 181047 1866644 1624172 4096 4 18026 19142 744593 677231 4096 8 31300 36873 926248 890249 4096 16 46019 62255 1211829 1236690 4096 32 66854 83887 1310659 1396986 4096 64 72903 100790 1712369 1293781 4096 128 92489 127335 1841791 1471911 4096 256 85070 140853 1857723 1565676 4096 512 105640 180590 1885037 1635740 8192 4 17752 19322 831334 697676 8192 8 29843 35791 937514 1029634 8192 16 50606 58815 1265141 1263420 8192 32 70180 89973 1579336 1380086 8192 64 86035 105494 1793323 1811190 8192 128 104441 147516 1080195 1596879 8192 256 104120 148553 1860923 1699899 8192 512 103035 170659 2246791 1774339 16384 4 18134 20094 968373 875442 16384 8 30865 34179 1104942 932816 16384 16 48271 55807 1223510 1060734 16384 32 64392 80841 1503418 1196978 16384 64 75644 116968 1588529 1362946 16384 128 93295 134088 1978517 1602009 16384 256 96977 138589 1774467 1778923 16384 512 98290 155298 2003377 1571887 32768 4 17335 18860 710848 661926 32768 8 29339 33813 1025282 978646 32768 16 47012 53126 1350369 1151409 32768 32 66187 86604 1629354 1482847 32768 64 89499 107568 1652689 1513814 32768 128 99155 136692 1784462 1580797 32768 256 111067 140707 1856635 1508580 32768 512 114180 160476 1946650 1500920 65536 4