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 2 03:15:09 2026 Auto Mode Machine = Linux oleg144-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-oleg144-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 1704 6868 424198 460591 64 8 4799 28304 789967 651849 64 16 6229 42161 1066042 877797 64 32 6124 50957 1336792 1363961 64 64 9102 52937 1638743 1562436 128 4 3275 13001 581781 609522 128 8 7590 18553 247999 711270 128 16 12910 19981 1102844 836500 128 32 6681 42287 1254941 1336145 128 64 12310 45279 1185654 1243315 128 128 5095 111806 1579934 1705404 256 4 2136 6145 525621 695516 256 8 9196 15194 687940 815414 256 16 5797 44887 856386 864661 256 32 21900 54666 1384034 1190657 256 64 22717 57438 1230218 1076103 256 128 15391 86363 1552085 533455 256 256 25617 124149 988889 2015259 512 4 8224 4236 501536 373423 512 8 8857 8028 86502 515626 512 16 7949 14233 1148506 829847 512 32 22887 51385 453936 1040545 512 64 28474 75493 1492545 1020276 512 128 11355 45333 1426135 558251 512 256 35664 71628 1599251 1402845 512 512 32142 69735 1730717 1917728 1024 4 4094 7758 160698 559837 1024 8 9462 16163 485043 397174 1024 16 23391 21846 522959 428647 1024 32 19807 37027 942952 1096268 1024 64 36830 70122 513272 1460969 1024 128 28392 57544 847667 714065 1024 256 41119 93748 1261072 1565332 1024 512 39695 113994 1747480 612010 2048 4 7415 8866 339915 336625 2048 8 13023 13175 841094 698720 2048 16 15043 18005 477382 1034831 2048 32 24235 32410 687700 421927 2048 64 23317 32068 1471432 1276781 2048 128 28754 46731 1321161 1368956 2048 256 27190 48103 935640 1015262 2048 512 43252 81215 405955 765263 4096 4 6821 7357 265458 246405 4096 8 10385 14098 543017 571029 4096 16 18959 19055 467202 488081 4096 32 23431 27319 547289 569760 4096 64 29211 35771 785875 456234 4096 128 27710 46724 1523739 1109466 4096 256 23241 45580 1222696 1393134 4096 512 30317 41799 492601 425646 8192 4 2271 5219 377808 419759 8192 8 13309 10390 464742 402674 8192 16 16076 14974 406230 381237 8192 32 13849 22110 779666 490889 8192 64 26142 53816 544892 487269 8192 128 24288 36814 1100046 666664 8192 256 33270 47649 894533 803928 8192 512 38265 61207 883606 486029 16384 4 6303 4717 172245 161549 16384 8 8301 11025 1226546 948262 16384 16 16498 23121 435316 380359 16384 32 16189 15549 561847 503905 16384 64 22751 23448 495840 457703 16384 128 32907 34857 750353 615061 16384 256 33676 51014 494833 934999 16384 512 38134 63019 863181 988302 32768 4 5619 6685 420857 324635 32768 8 9770 9992 628100 485300 32768 16 16090 17895 851622 679903 32768 32