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: Sat Feb 28 14:00:05 2026 Auto Mode Machine = Linux oleg106-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-oleg106-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 14736 23030 576282 566551 64 8 28108 48746 969761 1330167 64 16 34010 73226 1105556 1421755 64 32 41134 113273 1879725 1188789 64 64 38348 94927 2467108 1638743 128 4 23889 30858 1085013 558771 128 8 34143 37657 1319723 1332828 128 16 48931 74629 978253 1543594 128 32 49345 132763 1727352 1085013 128 64 68963 160556 1243315 2784517 128 128 65505 179567 2132084 2608629 256 4 22021 22042 1036624 757326 256 8 32478 56563 1219045 753077 256 16 54030 106355 1673001 1686137 256 32 42695 117159 2350543 1570244 256 64 79928 127616 1201314 2266207 256 128 97863 232723 2049885 1514860 256 256 95811 267512 2081678 3705040 512 4 28207 35335 1120344 999850 512 8 40270 53046 1351633 1066910 512 16 68623 81218 1736314 903136 512 32 96477 127546 1882427 1778004 512 64 97264 150713 1772135 1897396 512 128 79752 189275 2022482 1835760 512 256 126197 244509 1835760 2875558 512 512 143416 286491 1869318 2024389 1024 4 26452 29061 943781 925080 1024 8 42382 60696 1432225 1319577 1024 16 67899 101375 1001903 1515083 1024 32 105457 95512 1517224 1331440 1024 64 89753 194203 2102484 2146618 1024 128 153546 265419 2414523 2450338 1024 256 161770 269906 2403712 1561348 1024 512 158715 283032 2174880 2480051 2048 4 27109 33421 837323 523654 2048 8 37134 53876 986917 1245855 2048 16 61074 90105 1483118 1575323 2048 32 109408 155801 1972971 1967097 2048 64 123284 145599 1793378 1992189 2048 128 107564 224240 2275596 2013672 2048 256 148718 264225 2041913 2519185 2048 512 147338 200864 1655793 2434922 4096 4 26168 30178 904831 751137 4096 8 41454 53189 1164989 918375 4096 16 66481 77829 2029564 1475451 4096 32 98307 131967 1526040 1797281 4096 64 124528 182069 1786256 1449924 4096 128 147089 203558 2245498 1819746 4096 256 148670 241664 2341919 1798787 4096 512 142440 256608 2192762 2005867 8192 4 26115 32349 1026957 935371 8192 8 44221 56871 1208114 1027725 8192 16 74610 81007 1872077 1344025 8192 32 96041 128774 1543924 1384925 8192 64 119664 187228 1523253 1294551 8192 128 144739 207098 1930235 1636115 8192 256 147071 205205 2047439 1359231 8192 512 153339 242238 2443827 2305588 16384 4 24924 29062 878644 891837 16384 8 46268 51102 1105991 1037356 16384 16 76034 81709 1636614 1041633 16384 32 78322 123937 1566941 1293036 16384 64