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 Jul 15 10:04:38 2026 Auto Mode Machine = Linux oleg205-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-oleg205-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 5203 19076 718114 395452 64 8 8208 34187 679917 1066042 64 16 16112 54896 955947 1562436 64 32 19167 91186 2006158 1143223 64 64 18369 77766 555990 1163036 128 4 13408 19349 538051 895074 128 8 20877 31211 1175271 680612 128 16 21907 45680 1539168 684954 128 32 17467 73354 1508887 1755594 128 64 18834 123566 1130717 1363288 128 128 21369 106209 1281909 1637771 256 4 14241 16959 717355 662883 256 8 26975 41619 1131677 965763 256 16 32189 68689 1080434 802614 256 32 41532 75319 1108314 1007446 256 64 58116 93159 1340826 1147398 256 128 27636 160600 1805197 1752173 256 256 57282 170684 1778290 1829808 512 4 16587 17925 567695 848872 512 8 31213 34862 1073309 675563 512 16 39363 63031 1145443 1184618 512 32 56295 119206 1904125 1434711 512 64 73006 118053 1480200 1571169 512 128 70580 194381 1402845 1842059 512 256 80301 172104 1585086 1629590 512 512 51364 167317 2263354 1835760 1024 4 19464 20341 653047 582146 1024 8 27926 36357 1544504 1172909 1024 16 38557 63681 1484193 1288307 1024 32 66453 103801 1592612 1464956 1024 64 71517 147700 2226749 1999700 1024 128 103029 147594 1732676 1380217 1024 256 53261 169736 1790460 1477555 1024 512 101859 255686 2150918 2156318 2048 4 17937 20143 662557 642007 2048 8 29063 40896 926657 826447 2048 16 46242 55976 1549185 1163032 2048 32 65508 82281 1524983 1250389 2048 64 87342 99013 1706788 1428131 2048 128 89978 130578 2070958 1671907 2048 256 92414 136251 1514764 1426234 2048 512 97914 180374 1662201 1706449 4096 4 18937 20147 578859 529804 4096 8 31883 34258 1179061 1140624 4096 16 46529 54090 1087071 1018681 4096 32 63798 79560 1609535 1368498 4096 64 75922 115553 1860137 1548600 4096 128 97922 132133 1826129 1265756 4096 256 104872 145531 1616349 1378712 4096 512 107761 166159 2279462 1780148 8192 4 17559 18418 856364 767835 8192 8 28042 31240 1073647 924498 8192 16 45899 57186 1064038 1047431 8192 32 64074 76620 1671453 1775439 8192 64 89358 110426 2008307 1717402 8192 128 83023 109491 1712438 1243260 8192 256 102179 148132 2093471 1591627 8192 512 106148 156938 1641743 1396975 16384 4 16937 18699 640425 662115 16384 8 29822 33753 1017436 1006321 16384 16 47723 54859 1280698 1304449 16384 32 71538 82220 1694818 1436059 16384 64 92695 122865 2251783 1495826 16384 128 111021 151307 1965895 1348265 16384 256 127545 164207 2148167 1781829 16384 512 118595 173372 1712387 1791771 32768 4 18007 18695 828270 616775 32768 8 29425 33592 1138967 950267 32768 16 47962 55215 1163299 1249924 32768 32 71945 89681 1587150 1463318 32768 64 94905 120936 2116535 1573107 32768 128 100832 133906 1551285 1428548 32768 256 104604 149136 1874615 1666314 32768 512 113996 163100 1802128 1642851 65536 4