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: Tue Jun 16 09:40:10 2026 Auto Mode Machine = Linux oleg141-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-oleg141-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 8159 16166 695778 512471 64 8 7996 12204 735831 752329 64 16 9736 42301 1143223 874936 64 32 13281 84101 394870 969761 64 64 11055 123316 1599680 1638743 128 4 5792 15684 739689 624409 128 8 8514 32275 790905 774922 128 16 18971 54351 1065630 841746 128 32 13781 95804 1997245 921183 128 64 16738 98548 2326073 2336194 128 128 6380 124396 1543594 1727352 256 4 13518 22061 461267 633922 256 8 14947 18258 836374 790209 256 16 30688 36312 1254656 179651 256 32 27506 87283 281614 1163562 256 64 27616 122603 1579483 1354356 256 128 29011 88186 1897721 1479379 256 256 24178 162643 2463808 3159869 512 4 15789 20328 539053 552932 512 8 22775 35075 1007827 1135150 512 16 25424 61376 1518938 1153441 512 32 35322 62030 823167 1413929 512 64 54982 134135 1463057 1100818 512 128 39060 141246 1795846 1672748 512 256 65464 185434 1783912 1753325 512 512 40308 170953 1674052 2039772 1024 4 17417 19824 693765 622837 1024 8 28055 31343 1072185 936782 1024 16 38088 57486 1753902 852547 1024 32 44168 74859 1818510 1363565 1024 64 36296 74886 1771262 1302766 1024 128 49112 122065 2007176 1345623 1024 256 31693 85475 1689730 639245 1024 512 52966 141199 1475525 1954207 2048 4 14922 15322 459925 383945 2048 8 22999 24374 1164293 945111 2048 16 41939 63131 1277730 1157859 2048 32 59864 86119 1399740 1265681 2048 64 68040 105030 1491617 1234397 2048 128 82133 141671 1637174 1684365 2048 256 66124 98037 1810768 1545562 2048 512 85405 106850 945944 1748834 4096 4 17229 18503 688411 681989 4096 8 28110 32807 701482 786055 4096 16 43096 57480 1166571 1022014 4096 32 67370 77207