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 Aug 13 10:44:55 2025 Auto Mode Machine = Linux oleg437-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-oleg437-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 14194 18406 240575 282027 64 8 21311 51703 423529 426219 64 16 26369 72066 1188789 447537 64 32 40581 117179 1638743 831569 64 64 32601 99983 1357066 1249666 128 4 13604 22967 260641 271173 128 8 21585 35135 503723 380003 128 16 33649 56861 533241 670413 128 32 38507 76599 853794 633247 128 64 46733 130599 1085013 1755594 128 128 48931 133722 1377278 1209698 256 4 20703 20181 324804 259370 256 8 29760 41444 746272 404452 256 16 33164 61245 627256 670332 256 32 53524 85825 794889 693718 256 64 80479 114853 1094754 931416 256 128 55663 208988 1212164 1368162 256 256 67118 143092 1463250 1842366 512 4 19025 21707 243567 244509 512 8 36618 41187 479905 357092 512 16 55124 76360 690108 846197 512 32 74010 94728 1082507 1028091 512 64 65777 117620 1032044 823167 512 128 90204 136976 1383861 1251589 512 256 83837 153800 1190529 1518938 512 512 68834 152295 1399189 2216629 1024 4 19069 22419 301722 350786 1024 8 31156 37113 467973 567606 1024 16 51279 61854 669331 630518 1024 32 66013 91037 885048 849176 1024 64 81444 146852 1214706 940475 1024 128 106301 149116 1213334 967813 1024 256 100627 199304 1542286 1408275 1024 512 82347 146142 2220992 1796451 2048 4 19483 20184 295442 299636 2048 8 34594 41238 482802 446861 2048 16 48714 62953 703066 632133 2048 32 68428 98089 1055559 884301 2048 64 106102 141435 1053487 1103423 2048 128 90946 139433 1427182 1233865 2048 256 96548 190018 1461667 1380839 2048 512 117633 166857 1919192 1534244 4096 4 21327 22673 306428 277149 4096 8 31925 35737 437884 468706 4096 16 52048 63300 770784 582984 4096 32 86772 91339 990376 753641 4096 64 87398 130870 1151866 1337287 4096 128 106379 152624 1444316 1299064 4096 256 109077 161412 1630617 1446749 4096 512 117924 184787 1653531 1463884 8192 4 19058 21212 281114 295825 8192 8 35519 39647 477750 427111 8192 16 65600 70617 968076 927743 8192 32 94762 98191 1026681 905399 8192 64 98492 121537 1557995 1443758 8192 128 104828 143268 1429642 1315517 8192 256 106704 169032 1638065 1557713 8192 512 122658 178845 1515059 1388227 16384 4 18871 20561 267297 255963 16384 8 34773 39987 570770 469213 16384 16 52168 58145 698256 594290 16384 32 82736 91749 989783 1081450 16384 64 94755 124317 1480837 1236522 16384 128 124678 166176 1515921 1278696 16384 256 131107 170704 1504208 1318617 16384 512 121739 199197 1808178 2076819 32768 4 22872 23792 349387 423244 32768 8 34567 45533 534341 506366 32768 16 56251 70933 722781 837992 32768 32 92728 94132 1072461 874467 32768 64 98552 134143 1276959 1303161 32768 128 116659 171548 1710230 1447932 32768 256 126902 189334 1673211 1655276 32768 512 152875 224914 2128335 1748836 65536 4 19812 24402 355062 321923 65536 8 35737 40082 501849 456655 65536 16 55915 64306 750655 709848